subject:( Fe2O3)

1. Ταπεινός, Χρήστος. Σύνθεση και χαρακτηρισμός νανοσφαιρών οξειδίων σιδήρου : μελέτη μαγνητικών ιδιοτήτων αιματίτη και μαγγεμίτη.

Degree: 2009, University of Patras

URL: http://nemertes.lis.upatras.gr/jspui/handle/10889/4137

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Πολλοί από τους τομείς της επιστημονικής έρευνας, όπως χημεία, ενέργεια, βιομηχανία και ιατρική χρησιμοποιούν τη νανοτεχνολογία, με στόχο την παρασκευή υλικών, με καλύτερες και πιο… (more)

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Πολλοί από τους τομείς της επιστημονικής έρευνας, όπως χημεία, ενέργεια, βιομηχανία και ιατρική χρησιμοποιούν τη νανοτεχνολογία, με στόχο την παρασκευή υλικών, με καλύτερες και πιο εξειδικευμένες ιδιότητες σε σχέση με τα συμβατικά υλικά του μακρόκοσμου. Οι νανοσφαίρες λόγω των ποικίλων ιδιοτήτων που παρουσιάζουν, όπως οπτικές, μηχανικές, ηλεκτρικές κ.α., μπορούν να χρησιμοποιηθούν σε διάφορους τομείς της καθημερινής μας ζωής με μεγαλύτερο ενδιαφέρον στον τομέα της υγείας. Η παρούσα ερευνητική εργασία πραγματοποιήθηκε με στόχο τη σύνθεση και τη μελέτη νανοσφαιρών οξειδίων του σιδήρου. Πιο συγκεκριμένα παρασκευάσθηκαν νανοσφαίρες αιματίτη (α – Fe2O3) και μαγγεμίτη (γ – Fe2O3) και μελετήθηκαν οι μαγνητικές τους ιδιότητες. Στο πρώτο κεφάλαιο παρουσιάζεται μία εισαγωγή – ιστορική αναδρομή στο χώρο της νανοτεχνολογίας και των νανοσφαιρών. Γίνεται επίσης αναφορά στους τρόπους σύνθεσης των νανοσφαιρών και αναφέρονται εν συντομία κάποιες ιδιότητες και εφαρμογές αυτών. Στο δεύτερο κεφάλαιο αναφέρονται κάποιες βασικές έννοιες οι οποίες είναι απαραίτητες για την κατανόηση των ταχνικών που θα χρησιμοποιηθούν. Παρουσιάζονται αναλυτικά οι τρόποι με τους οποίους πραγματοποιείται η σύνθεση των νανοσφαιρών και περιγράφονται αναλυτικά, η μέθοδος λύματος – πηκτής (sol – gel) και η τεχνική του πολυμερισμού. Στο τρίτο κεφάλαιο αναφέρονται τα αντιδραστήρια καθώς επίσης και οι πειραματικές μέθοδοι που χρησιμοποιήθηκαν για το χαρακτηρισμό των νανοσφαιρών και τη μελέτη των ιδιοτήτων τους. Αναφέρονται επίσης τα όργανα που χρησιμοποιήθηκαν καθώς επίσης και οι βασικές αρχές λειτουργίας αυτών. Στο τέταρτο κεφάλαιο περιγράφεται αναλυτικά η πειραματική διαδικασία που πραγματοποιήθηκε και γίνεται συζήτηση των αποτελεσμάτων. Τέλος στο πέμπτο κεφάλαιο ανγράφονται τα συμπεράσματα και αναφέρονται μελλοντικοί στόχοι.

Nanotechnology is the study of the control of matter on an atomic and molecular scale and it’s main objective is the manufacture of new materials with better and more sophisticated properties. Nanotechnology is used in many different sciences like chemistry, physics and most of all in medicine. Nanospheres exhibit many diverse properties (electrical, optical etc) which render them the best solution for application such as drug delivery systems, Magnetic Resonance Imaging (MRI) agents, hyperthermia etc. The present work deals with the synthesis and characterization of magnetic nanospheres and more specifically in the study of magnetic properties of hematite (α – Fe2O3) and maghemite (γ – Fe2O3). The first chapter starts with a short introduction for nanospheres and nanotechnology . It reports also a quick historical review and some lines about new generation nanospheres, it’s properties and it’s applications. In the second chapter, polymerization and sol – gel techniques are described analytically. In the third chapter, reactants and experimental methods are described as well as some basic principles of the methods that were used to characterize the samples. The fourth chapter is the results and discussion session. …

Advisors/Committee Members: Κόρδας, Γεώργιος, Tapeinos, Christos, Κόρδας, Γεώργιος, Πουλόπουλος, Παναγιώτης, Μπουρόπουλος, Νικόλαος.

Subjects/Keywords: Μαγγεμίτης; γ-Fe2O3; Οξείδια; Σίδηρος; Μαγνητικές ιδιότητες; Νανόσφαιρες; Αιματίτης; α-Fe2O3; 546.621 2; Maghemite; Oxides; Iron; Magnetic properties; Hematite; Nanospheres

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Ταπεινός, �. (2009). Σύνθεση και χαρακτηρισμός νανοσφαιρών οξειδίων σιδήρου : μελέτη μαγνητικών ιδιοτήτων αιματίτη και μαγγεμίτη. (Masters Thesis). University of Patras. Retrieved from http://nemertes.lis.upatras.gr/jspui/handle/10889/4137

Chicago Manual of Style (16^th Edition):

Ταπεινός, Χρήστος. “Σύνθεση και χαρακτηρισμός νανοσφαιρών οξειδίων σιδήρου : μελέτη μαγνητικών ιδιοτήτων αιματίτη και μαγγεμίτη.” 2009. Masters Thesis, University of Patras. Accessed January 15, 2021. http://nemertes.lis.upatras.gr/jspui/handle/10889/4137.

MLA Handbook (7^th Edition):

Ταπεινός, Χρήστος. “Σύνθεση και χαρακτηρισμός νανοσφαιρών οξειδίων σιδήρου : μελέτη μαγνητικών ιδιοτήτων αιματίτη και μαγγεμίτη.” 2009. Web. 15 Jan 2021.

Vancouver:

Ταπεινός �. Σύνθεση και χαρακτηρισμός νανοσφαιρών οξειδίων σιδήρου : μελέτη μαγνητικών ιδιοτήτων αιματίτη και μαγγεμίτη. [Internet] [Masters thesis]. University of Patras; 2009. [cited 2021 Jan 15]. Available from: http://nemertes.lis.upatras.gr/jspui/handle/10889/4137.

Council of Science Editors:

Ταπεινός �. Σύνθεση και χαρακτηρισμός νανοσφαιρών οξειδίων σιδήρου : μελέτη μαγνητικών ιδιοτήτων αιματίτη και μαγγεμίτη. [Masters Thesis]. University of Patras; 2009. Available from: http://nemertes.lis.upatras.gr/jspui/handle/10889/4137

University of Alberta

2. Olson, Blake J. The Role of Sulfur during the Cracking of n-Hexadecane and Cold Lake Bitumen with alpha-Fe2O3 and Steam.

Degree: MS, Department of Chemical and Materials Engineering, 2013, University of Alberta

URL: https://era.library.ualberta.ca/files/5h73pw85g

► Coke produced during bitumen upgrading has a high heteroatom content and low economic value. To improve feed efficiency, cracking of hexadecane and bitumen with α-Fe2O3… (more)

Subjects/Keywords: Coke; Alpha-Fe2O3; Hexadecane; Liquid phase cracking; Cold Lake Bitumen; Steam

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Olson, B. J. (2013). The Role of Sulfur during the Cracking of n-Hexadecane and Cold Lake Bitumen with alpha-Fe2O3 and Steam. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/5h73pw85g

Chicago Manual of Style (16^th Edition):

Olson, Blake J. “The Role of Sulfur during the Cracking of n-Hexadecane and Cold Lake Bitumen with alpha-Fe2O3 and Steam.” 2013. Masters Thesis, University of Alberta. Accessed January 15, 2021. https://era.library.ualberta.ca/files/5h73pw85g.

MLA Handbook (7^th Edition):

Olson, Blake J. “The Role of Sulfur during the Cracking of n-Hexadecane and Cold Lake Bitumen with alpha-Fe2O3 and Steam.” 2013. Web. 15 Jan 2021.

Vancouver:

Olson BJ. The Role of Sulfur during the Cracking of n-Hexadecane and Cold Lake Bitumen with alpha-Fe2O3 and Steam. [Internet] [Masters thesis]. University of Alberta; 2013. [cited 2021 Jan 15]. Available from: https://era.library.ualberta.ca/files/5h73pw85g.

Council of Science Editors:

Olson BJ. The Role of Sulfur during the Cracking of n-Hexadecane and Cold Lake Bitumen with alpha-Fe2O3 and Steam. [Masters Thesis]. University of Alberta; 2013. Available from: https://era.library.ualberta.ca/files/5h73pw85g

Universidade do Rio Grande do Norte

3. Brasileiro, Islanny Larissa Ouriques. Aplicação de óxidos mistos de a-Fe2O3/Nb2O5 obtidos pelo método Pechini em reações de fotodegradação .

Degree: 2019, Universidade do Rio Grande do Norte

URL: http://repositorio.ufrn.br/handle/123456789/26680

► New catalysts with high efficiency for the degradation of organic compounds at effluents, mediated by sunlight and that are stable, has been a great challenge.… (more)

▼ New catalysts with high efficiency for the degradation of organic compounds at effluents, mediated by sunlight and that are stable, has been a great challenge. In this work, mixed oxides of -Fe2O3/Nb2O5 were prepared from a Pechini method, with two different mass ratios (-Fe2O3 and Nb2O5 (60/40 and 80/20, respectively) and calcination temperatures between 500 and 800 ° C. The influence of these parameters was investigated on the materials structural, morphological, optical and photocatalytic properties. These catalysts were submitted to methylene blue (MB) degradation tests by both photocatalysis and photo-Fenton reaction. The best performing sample in these initial tests was used in the following tests to optimize the process operating conditions through a 24 experimental design with triplicate at the central point. The catalytic reaction mechanism, the limiting step, the reaction rate law and the catalyst stability were also evaluated. Crystalline nanoparticles were obtained with significant differences in their properties and in the degradation efficiency of the methylene blue dye under UV-Vis radiation. Calcination temperatures between 500 and 800 °C led to the formation of different crystalline phases, including: -Fe2O3, Nb2O5, FeNbO4 and FeNb2O6; as well as the formation of materials with multigap behavior. The sample of 60 % -Fe2O3 and 40 % of Nb2O5 and calcined at 500 ºC (0,6-Fe/Nb-1) presented the highest catalytic activity and was then used in the following tests at photo-Fenton-like reactions. According to the factorial experimental design 24 performed, the variables that presented a significant effect on the response were: AM, catalyst and H2O2 concentrations. The proposed mechanism followed an LH type kinetics with double site mechanism, with the highest colour removal percentage obtained at 85 % after 4 h of experiment, under the optimum operating conditions found. This result this result was superior to pure synthesized oxides. The catalyst was stable even after 5 consecutive cycles of reaction, unlike Nb2O5, with potential application in the treatment of environmental pollutants. Advisors/Committee Members: Souza, Carlson Pereira de (advisor), 13681389420 (advisor), Moriyama, André Luis Lopes (advisor), 06663278401 (advisor).

Subjects/Keywords: a-Fe2O3; Nb2O5; Pechini; Fotocatálise; Foto-Fenton; Planejamento experimental

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Brasileiro, I. L. O. (2019). Aplicação de óxidos mistos de a-Fe2O3/Nb2O5 obtidos pelo método Pechini em reações de fotodegradação . (Masters Thesis). Universidade do Rio Grande do Norte. Retrieved from http://repositorio.ufrn.br/handle/123456789/26680

Chicago Manual of Style (16^th Edition):

Brasileiro, Islanny Larissa Ouriques. “Aplicação de óxidos mistos de a-Fe2O3/Nb2O5 obtidos pelo método Pechini em reações de fotodegradação .” 2019. Masters Thesis, Universidade do Rio Grande do Norte. Accessed January 15, 2021. http://repositorio.ufrn.br/handle/123456789/26680.

MLA Handbook (7^th Edition):

Brasileiro, Islanny Larissa Ouriques. “Aplicação de óxidos mistos de a-Fe2O3/Nb2O5 obtidos pelo método Pechini em reações de fotodegradação .” 2019. Web. 15 Jan 2021.

Vancouver:

Brasileiro ILO. Aplicação de óxidos mistos de a-Fe2O3/Nb2O5 obtidos pelo método Pechini em reações de fotodegradação . [Internet] [Masters thesis]. Universidade do Rio Grande do Norte; 2019. [cited 2021 Jan 15]. Available from: http://repositorio.ufrn.br/handle/123456789/26680.

Council of Science Editors:

Brasileiro ILO. Aplicação de óxidos mistos de a-Fe2O3/Nb2O5 obtidos pelo método Pechini em reações de fotodegradação . [Masters Thesis]. Universidade do Rio Grande do Norte; 2019. Available from: http://repositorio.ufrn.br/handle/123456789/26680

Univerzitet u Beogradu

4. Nikolić, Violeta, 1986-. Магнетне особине наночестица оксида гвожђа површински модификованих силицијум диоксидом и олеинском киселином.

Degree: Fakultet za fizičku hemiju, 2017, Univerzitet u Beogradu

URL: https://fedorabg.bg.ac.rs/fedora/get/o:16782/bdef:Content/get

► У оквиру ове дисертације су представљени резултати проучавања магнетних особина наночестичних оксида гвожђа површински модификованих силицијум диоксидом (SiO2) и олеинском киселином (ОК). Узорци су синтетисани… (more)

Subjects/Keywords: nanoparticle iron oxide: ε-Fe2O3 phase and Fe3O4; coercivity; SR phenomenon

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Nikolić, Violeta, 1. (2017). Магнетне особине наночестица оксида гвожђа површински модификованих силицијум диоксидом и олеинском киселином. (Thesis). Univerzitet u Beogradu. Retrieved from https://fedorabg.bg.ac.rs/fedora/get/o:16782/bdef:Content/get

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Nikolić, Violeta, 1986-. “Магнетне особине наночестица оксида гвожђа површински модификованих силицијум диоксидом и олеинском киселином.” 2017. Thesis, Univerzitet u Beogradu. Accessed January 15, 2021. https://fedorabg.bg.ac.rs/fedora/get/o:16782/bdef:Content/get.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Nikolić, Violeta, 1986-. “Магнетне особине наночестица оксида гвожђа површински модификованих силицијум диоксидом и олеинском киселином.” 2017. Web. 15 Jan 2021.

Vancouver:

Nikolić, Violeta 1. Магнетне особине наночестица оксида гвожђа површински модификованих силицијум диоксидом и олеинском киселином. [Internet] [Thesis]. Univerzitet u Beogradu; 2017. [cited 2021 Jan 15]. Available from: https://fedorabg.bg.ac.rs/fedora/get/o:16782/bdef:Content/get.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Nikolić, Violeta 1. Магнетне особине наночестица оксида гвожђа површински модификованих силицијум диоксидом и олеинском киселином. [Thesis]. Univerzitet u Beogradu; 2017. Available from: https://fedorabg.bg.ac.rs/fedora/get/o:16782/bdef:Content/get

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of South Florida

5. Alrobei, Hussein. Synthesis and Characterization of Alpha-Hematite Nanomaterials for Water-Splitting Applications.

Degree: 2018, University of South Florida

URL: https://scholarcommons.usf.edu/etd/7661

► The recent momentum in energy research has simplified converting solar to electrical energy through photoelectrochemical (PEC) cells. There are numerous benefits to these PEC cells,… (more)

▼ The recent momentum in energy research has simplified converting solar to electrical energy through photoelectrochemical (PEC) cells. There are numerous benefits to these PEC cells, such as the inexpensive fabrication of thin film, reduction in absorption loss (due to transparent electrolyte), and a substantial increase in the energy conversion efficiency. Alpha-hematite ([U+F061]-Fe2O3) has received considerable attention as a photoanode for water-splitting applications in photoelectrochemical (PEC) devices. The alpha-hematite ([U+F061]-Fe2O3) nanomaterial is attractive due to its bandgap of 2.1eV allowing it to absorb visible light. Other benefits of [U+F061]-Fe2O3 include low cost, chemical stability and availability in nature, and excellent photoelectrochemical (PEC) properties to split water into hydrogen and oxygen. However, [U+F061]-Fe2O3 suffers from low conductivity, slow surface kinetics, and low carrier diffusion that causes degradation of PEC device performance. The low carrier diffusion of [U+F061]-hematite is related to higher resistivity, slow surface kinetics, low electron mobility, and higher electro-hole combinations. All the drawbacks of [U+F061]-Fe2O3, such as low carrier mobility and electronic diffusion properties, can be enhanced by doping, which forms the nanocomposite and nanostructure films. In this study, all nanomaterials were synthesized utilizing the sol-gel technique and investigated using Scanning Electron Microscopy (SEM), X-ray Diffractometer (XRD), UV-Visible Spectrophotometer (UV-Vis), Fourier Transform Infrared Spectroscopy (FTIR), Raman techniques, Particle Analyzer, Cyclic Voltammetry (CV), and Chronoamperometry, respectively. The surface morphology is studied by SEM. X-Ray diffractometer (XRD) is used to identify the crystalline phase and to estimate the crystalline size. FTIR is used to identify the chemical bonds as well as functional groups in the compound. A UV-Vis absorption spectral study may assist in understanding electronic structure of the optical band gap of the material. Cyclic voltammetry and chronoamperometry were used to estimate the diffusion coefficient and study electrochemical activities at the electrode/electrolyte interface. In this investigation, the [U+F061]-Fe2O3 was doped with various materials such as metal oxide (aluminum, Al), dichalcogenide (molybdenum disulfide, MoS2), and co-catalyst (titanium dioxide, TiO2). By doping or composite formation with different percentage ratios (0.5, 10, 20, 30) of aluminum (Al) containing [U+F061]-Fe2O3, the mobility and carrier diffusion properties of [U+F061]-hematite ([U+F061]-Fe2O3) can be enhanced. The new composite, Al-[U+F061]-Fe2O3, improved charge transport properties through strain introduction in the lattice structure, thus increasing light absorption. The increase of Al contents in [U+F061]-Fe2O3 shows clustering due to the denser formation of the Al-[U+F061]-Fe2O3 particle. The presence of aluminum causes the change in structural and optical and morphological properties of Al-[U+F061]-Fe2O3 more than the…

Subjects/Keywords: hematite (α-Fe2O3); MoS2; nanocomposite; photoelectrochemical; TiO2; Mechanical Engineering

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Alrobei, H. (2018). Synthesis and Characterization of Alpha-Hematite Nanomaterials for Water-Splitting Applications. (Thesis). University of South Florida. Retrieved from https://scholarcommons.usf.edu/etd/7661

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Alrobei, Hussein. “Synthesis and Characterization of Alpha-Hematite Nanomaterials for Water-Splitting Applications.” 2018. Thesis, University of South Florida. Accessed January 15, 2021. https://scholarcommons.usf.edu/etd/7661.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Alrobei, Hussein. “Synthesis and Characterization of Alpha-Hematite Nanomaterials for Water-Splitting Applications.” 2018. Web. 15 Jan 2021.

Vancouver:

Alrobei H. Synthesis and Characterization of Alpha-Hematite Nanomaterials for Water-Splitting Applications. [Internet] [Thesis]. University of South Florida; 2018. [cited 2021 Jan 15]. Available from: https://scholarcommons.usf.edu/etd/7661.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Alrobei H. Synthesis and Characterization of Alpha-Hematite Nanomaterials for Water-Splitting Applications. [Thesis]. University of South Florida; 2018. Available from: https://scholarcommons.usf.edu/etd/7661

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

6. Τσούλος, Θεόδωρος. Μη-γραμμικές οπτικές ιδιότητες νανοσωματιδίων/νανοδομών οξειδίων μετάλλων.

Degree: 2014, University of Patras

URL: http://hdl.handle.net/10889/8113

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Η παρούσα ειδική ερευνητική εργασία συνιστά μια μελέτη των μη-γραμμικών οπτικών ιδιοτήτων πέντε δειγμάτων νανοσωματιδίων οξειδίων μετάλλων. Κατ’ όνομα πρόκειται για το μονοξείδιο του Κοβαλτίου… (more)

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Η παρούσα ειδική ερευνητική εργασία συνιστά μια μελέτη των μη-γραμμικών οπτικών ιδιοτήτων πέντε δειγμάτων νανοσωματιδίων οξειδίων μετάλλων. Κατ’ όνομα πρόκειται για το μονοξείδιο του Κοβαλτίου (CoO), το τετροξείδιο του Μαγγανίου (Mn3O4), το μονοξείδιο του Νικελίου (NiO), τον Αιματίτη (α-Fe2O3) και τον Μαγγεμίτη (γ-Fe2O3). Οι τρίτης τάξης οπτικές μη-γραμμικότητές τους διερευνήθηκαν με την πειραματική τεχνική Z-scan, της οποίας οι βασικές αρχές και οι πειραματικές λεπτομέρειες περιγράφονται στο δεύτερο κεφάλαιο της παρούσης. Ειδικότερα, δίδονται τεχνικές λεπτομέρειες για τις πειραματικές διατάξεις που χρησιμοποιήθηκαν, μελετώνται τα δύο κύρια φαινόμενα που αξιοποιεί η τεχνική, η μη-γραμμική διάθλαση και η μη-γραμμική απορρόφηση και γίνεται σύντομη μαθηματική περιγραφή και παράθεση της διαδικασίας ανάλυσης δεδομένων. Προηγείται των ανωτέρω μια περιεκτική θεωρητική θεμελίωση των βασικών αρχών της μη-γραμμικής οπτικής στο πρώτο κεφάλαιο. Αναπτύσσεται εκ των εξισώσεων Maxwell η μη-γραμμική κυματική εξίσωση. Περιγράφονται οι διεργασίες της γενέσεως δευτέρας αρμονικής, αθροίσματος και διαφοράς συχνοτήτων και διαδοχικά τα βαρύνουσας σημασίας φαινόμενα της αυτό-εστίασης, αυτό-απoεστίασης, κορέσιμης και ανάστροφα κορέσιμης απορρόφησης. Παρατίθεται εν συνεχεία ένας κβαντομηχανικός ορισμός της τρίτης τάξης μη-γραμμικής επιδεκτικότητος και τέλος περιγράφονται αναλυτικά οι μηχανισμοί συνεισφοράς στον μη-γραμμικό δείκτη διάθλασης, από την παραμόρφωση του ηλεκτρονικού νέφους, ως την ηλεκτροσυστολή και τα θερμικά φαινόμενα. Στο τρίτο κεφάλαιο παρουσιάζονται θεωρητικά στοιχεία για τις ιδιότητες των νανοσωματιδίων οξειδίων μετάλλων, την επίδραση του μεγέθους στις εγγενείς ιδιότητες της ύλης και παραδείγματα των πιο ευρέως διαδεδομένων εφαρμογών τους. Εν συντομία δίδονται οι τεχνικές σύνθεσης και οι ενδελεχείς χαρακτηρισμοί που εφαρμόστηκαν με σκοπό να φωτιστούν πλευρές της κρύφιας και ασαφούς φύσης των νανοσωματιδίων. Στο τέταρτο κεφάλαιο παρατίθενται λεπτομερώς οι πειραματικές μετρήσεις, από τα φάσματα απορρόφησης που ελήφθησαν για κάθε παρασκευασθείσα συγκέντρωση διεσπαρμένων νανοσωματιδίων, ως τις γραφικές παραστάσεις που αντιστοιχούν στην τεχνική Z-scan. Συγκεντρώνονται σε πίνακες όλες οι μη-γραμμικές οπτικές παράμετροι που υπολογίστηκαν και λαμβάνει χώρα αναλυτική συζήτηση για τα αποτελέσματα. Τα αποτελέσματα ομαδοποιούνται, εξάγονται ενδιαφέροντα συμπεράσματα και γίνεται σύγκριση με τη βιβλιογραφία.

The present work, a master thesis, is a study of the nonlinear optical properties of five metal oxide nanoparticles, namely Cobalt monoxide (CoO), Manganese tetroxide (Mn3O4), Nickel monoxide (NiO), Hematite (α-Fe2O3) and Maghemite (γ-Fe2O3). Their third ordrer optical nonlinearities were investigated by the means of the Z-scan experimental technique. The basic principles and the experimental details of this technique are described in the second chapter of the present work. Moreover, technical details of the experimental setups used are presented, the two most important phaenomena involved in Z-scan, nonlinear absorption and…

Advisors/Committee Members: Κουρής, Στυλιανός, Tsoulos, Theodoros, Βάινος, Νικόλαος, Κούτσελας, Ιωάννης.

Subjects/Keywords: Νανοσωματίδια; Οπτικές ιδιότητες; Μονοξείδιο του κοβαλτίου (CoO); Τετροξείδιο του μαγγανίου (Mn3O4); Μονοξείδιο του νικελίου (NiO); Αιματίτης (α-Fe2O3); Μαγγεμίτης (γ-Fe2O3); 669.967 3; Nanoparticles; Optical properties; Z-scan

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Τσούλος, �. (2014). Μη-γραμμικές οπτικές ιδιότητες νανοσωματιδίων/νανοδομών οξειδίων μετάλλων. (Masters Thesis). University of Patras. Retrieved from http://hdl.handle.net/10889/8113

Chicago Manual of Style (16^th Edition):

Τσούλος, Θεόδωρος. “Μη-γραμμικές οπτικές ιδιότητες νανοσωματιδίων/νανοδομών οξειδίων μετάλλων.” 2014. Masters Thesis, University of Patras. Accessed January 15, 2021. http://hdl.handle.net/10889/8113.

MLA Handbook (7^th Edition):

Τσούλος, Θεόδωρος. “Μη-γραμμικές οπτικές ιδιότητες νανοσωματιδίων/νανοδομών οξειδίων μετάλλων.” 2014. Web. 15 Jan 2021.

Vancouver:

Τσούλος �. Μη-γραμμικές οπτικές ιδιότητες νανοσωματιδίων/νανοδομών οξειδίων μετάλλων. [Internet] [Masters thesis]. University of Patras; 2014. [cited 2021 Jan 15]. Available from: http://hdl.handle.net/10889/8113.

Council of Science Editors:

Τσούλος �. Μη-γραμμικές οπτικές ιδιότητες νανοσωματιδίων/νανοδομών οξειδίων μετάλλων. [Masters Thesis]. University of Patras; 2014. Available from: http://hdl.handle.net/10889/8113

7. Rajh, Tina. Novi kompoziti nanodelcev Fe2O3 in polimernih nosilnih materialov- razširjanje možnosti biomedicinske uporabe.

Degree: 2019, Univerza v Mariboru

URL: https://dk.um.si/IzpisGradiva.php?id=73078 ; https://dk.um.si/Dokument.php?id=132715&dn= ; https://plus.si.cobiss.net/opac7/bib/22194966?lang=sl

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Namen magistrske naloge je priprava biokompatibilnih nanodelcev Fe2O3 s primerno magnetizacijo in Curiejevo temperaturo (Tc). V prvi fazi smo sintetizirati magnetne Fe2O3 nanodelce s pomočjo… (more)

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Namen magistrske naloge je priprava biokompatibilnih nanodelcev Fe2O3 s primerno magnetizacijo in Curiejevo temperaturo (Tc). V prvi fazi smo sintetizirati magnetne Fe2O3 nanodelce s pomočjo soobarjanja in jih nato oblekli še s siliko. Nato smo s pomočjo rentgenske praškovne difrakcije (XRD) ter z metodo Fourierjeve transformirane infrardeče spektroskopije (FTIR) analizirali kemijsko sestavo sintetiziranih nanodelcev ter kasneje z metodo dinamičnega sipanja svetlobe (DLS) in z uporabo transmisijskega elektronskega mikroskopa (TEM) preverili ali so delci oblečeni s siliko ter tako primerni za nadaljne delo. S termogravimetrično metodo (TGA) smo določili Curiejevo temperaturo (Tc) ter opazovali kako se spreminja masa delcev s časom po termičnem razkroju. V naslednji fazi smo pripravljali tanke filme na osnovi alginata z vgrajenimi nanodelci Fe2O3 in modelne zdravilne učinkovine (ZU) lidokaina (LID), pogosto uporabljen lokalni anestetik. Tanke filme smo pripravili na dva različna načina in sicer na:  In situ način: nanodelce smo prelili z raztopino učinkovine v etanolu.  Ločeno vgrajevanje nanodelcev in učinkovine lidokaina v tanke filme. Tanke filme smo pripravili v treh slojih s pomočjo »spin- coating« metode. Nato smo s pomočjo UV-VIS spektrofotometra spremljali sproščanje zdravilne učinkovine (ZU) lidokaina. Sproščanje je potekalo 24 ur v Francovih difuzijskih celicah. Dokazali smo, da je sproščanje zdravilne učinkovine bilo uspešno ter da s koncentracijo vgrajene zdravilne učinkovine v tanke filme lahko vplivamo tudi na sproščanje zdravilne učinkovine. S pomočjo uporabljenih metod smo dokazali, da so pripravljeni delci primerni za nadaljnje preskušanje v smeri biomedicinskih aplikacij, še posebej na področju zdravljenja raka ali kot kontrastna sredstva.

The purpose of this master thesis is the preparation of biocompatible Fe2O3 nanoparticles with a suitable magnetization and Curie temperature (Tc). In the first phase we synthesized magnetic Fe2O3 nanoparticles with the help of a co-precipitate and coated these with silica. With the help of X-ray powder diffraction (XRD) and the Fourier transform infrared spectroscopy (FTIR) we analysed the chemical composition of the synthesized nanoparticles and later on, by using dynamic light scattering (DLS) and transmission electron microscopy (TEM), we checked if the particles are indeed coated with silica and therefore ready for further work. With the thermogravimetric analysis (TGA) we determined the Curie temperature (Tc) and observed the changes in mass of the particles after thermic disintegration. In the next phase, we prepared alginate-based thin films with incorporated Fe2O3 nanoparticles and the model drug lidocaine (LID), a common local anaesthetic. We prepared the thin films in two different ways:  In situ approach: we covered the nanoparticles with the solution of the active substance in ethanol.  Separate incorporation of nanoparticles and the active substance lidocaine into the thin films. The thin films were prepared in three layers with the help…

Advisors/Committee Members: Kristl, Matjaž.

Subjects/Keywords: nanodelci; Fe2O3; soobarjanje; lidokain; alginat; Curiejeva temperatura; nanoparticles; Fe2O3; co-precipitation; lidocaine; alginate; Curie temperature; info:eu-repo/classification/udc/544.023.22:615.015.1(043.2)

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Rajh, T. (2019). Novi kompoziti nanodelcev Fe2O3 in polimernih nosilnih materialov- razširjanje možnosti biomedicinske uporabe. (Masters Thesis). Univerza v Mariboru. Retrieved from https://dk.um.si/IzpisGradiva.php?id=73078 ; https://dk.um.si/Dokument.php?id=132715&dn= ; https://plus.si.cobiss.net/opac7/bib/22194966?lang=sl

Chicago Manual of Style (16^th Edition):

Rajh, Tina. “Novi kompoziti nanodelcev Fe2O3 in polimernih nosilnih materialov- razširjanje možnosti biomedicinske uporabe.” 2019. Masters Thesis, Univerza v Mariboru. Accessed January 15, 2021. https://dk.um.si/IzpisGradiva.php?id=73078 ; https://dk.um.si/Dokument.php?id=132715&dn= ; https://plus.si.cobiss.net/opac7/bib/22194966?lang=sl.

MLA Handbook (7^th Edition):

Rajh, Tina. “Novi kompoziti nanodelcev Fe2O3 in polimernih nosilnih materialov- razširjanje možnosti biomedicinske uporabe.” 2019. Web. 15 Jan 2021.

Vancouver:

Rajh T. Novi kompoziti nanodelcev Fe2O3 in polimernih nosilnih materialov- razširjanje možnosti biomedicinske uporabe. [Internet] [Masters thesis]. Univerza v Mariboru; 2019. [cited 2021 Jan 15]. Available from: https://dk.um.si/IzpisGradiva.php?id=73078 ; https://dk.um.si/Dokument.php?id=132715&dn= ; https://plus.si.cobiss.net/opac7/bib/22194966?lang=sl.

Council of Science Editors:

Rajh T. Novi kompoziti nanodelcev Fe2O3 in polimernih nosilnih materialov- razširjanje možnosti biomedicinske uporabe. [Masters Thesis]. Univerza v Mariboru; 2019. Available from: https://dk.um.si/IzpisGradiva.php?id=73078 ; https://dk.um.si/Dokument.php?id=132715&dn= ; https://plus.si.cobiss.net/opac7/bib/22194966?lang=sl

8. Godnjavec, Jerneja. VPLIV POVRŠINSKE OBDELAVE NANODELCEV TITANOVEGA DIOKSIDA RUTILNE KRISTALNE STRUKTURE NA UV ABSORPCIJSKE LASTNOSTI POLIMERNEGA NANOKOMPOZITA.

Degree: 2012, Univerza v Mariboru

URL: https://dk.um.si/IzpisGradiva.php?id=37160 ; https://dk.um.si/Dokument.php?id=48815&dn= ; https://plus.si.cobiss.net/opac7/bib/16199190?lang=sl

► Polimerni kompoziti, ki se uporabljajo tudi v premaznih sredstvih, estetsko spreminjajo okolje, v katerem živimo, obenem pa jih uporabljamo tudi za zaščito površin, ki lahko… (more)

▼ Polimerni kompoziti, ki se uporabljajo tudi v premaznih sredstvih, estetsko spreminjajo okolje, v katerem živimo, obenem pa jih uporabljamo tudi za zaščito površin, ki lahko propadajo zaradi škodljivih zunanjih vplivov, npr. zaradi izpostave UV svetlobi. Nove tehnološke rešitve zaradi izboljšanja funkcionalne lastnosti, kot je npr. UV zaščita, se v industriji polimernih kompozitov uvajajo tudi s pomočjo nanotehnologije, v tem primeru z vgradnjo nanodelcev TiO2. Pomembno vlogo v skupini nanodelcev, ki se uporabljajo v polimernih kompozitih, predstavljajo nanodelci TiO2. Veliko raziskav je bilo usmerjenih v študij posebnih lastnosti nanodelcev TiO2, ki omogočajo doseganje posebnih funkcijskih lastnosti in transparentnosti polimernih kompozitov. Nanodelci TiO2 rutilne kristalne strukture so odlični UV absorberji, zato se dodajajo različnim polimernim kompozitom za doseganje izboljšane UV in vremenske obstojnosti. Za optimalno izkoriščanje posebnih lastnosti nanodelcev v polimernih kompozitih je ključni problem tendenca aglomeracije nanodelcev zaradi London - van der Waals - ovih interakcij v disperziji. To je mogoče preprečiti z ustrezno stabilizacijo nanodelcev v disperziji, kar zagotavlja tudi ozko porazdelitev velikosti delcev in posledično omogoča zadostno transparentnost polimernega kompozita ter učinkovitost UV zaščite. Eden izmed načinov stabilizacije nanodelcev TiO2 rutilne kristalne strukture v disperziji je površinska obdelava z anorganskimi ter organskimi snovmi. Površinska obdelava površine rutilnih TiO2 nanodelcev z anorganskimi oksidi je pomembna zaradi izboljšanja disperzbilnosti ter zmanjšanja fotokatalitske aktivnosti. Prav tako anorganski sloj na površini nanodelcev poveča njihovo specifično površino v primerjavi z neobdelanim nanodelcem. Po apliciranju anorganskega oksida na površini TiO2 je le ta v vodni disperziji obdelan še z organskimi reagenti – površinsko aktivnimi sredstvi, ki omogočajo stabilizacijo v topilu oziroma polimeru in vzpostavijo odbojne sile med posameznimi delci ter posledično izboljšajo funkcionalno učinkovitost sistema. Doktorski študij temelji na izvedbi dveh inovativnih sklopov dodatne površinske obdelave nanodelcev TiO2 rutilne kristalne strukture ter določitvi vpliva na aplikacijske lastnosti in UV absorpcijsko učinkovitost polimernih nanokompozitov. V ta namen smo uporabili s koprecipitacijsko metodo sintetizirane nanodelce TiO2 rutilne kristalne strukture. Poleg klasične stabilizacije nanodelcev TiO2 s polidimetilsiloksani smo razvili dodatna komplementarna postopka površinske obdelave. Z namenom izboljšanje stabilnosti nanodelcev v vodni ter polimerni disperziji smo v prvem sklopu raziskav nanodelce TiO2 dodatno površinsko obdelali z 3 – glicidil oksipropil trimetoksi silanom (GLYMO), v drugem pa z anorganskim oksidom  - Fe2O3. Študirali smo vpliv razmerja TiO2/GLYMO ter procesnih pogojev priprave disperzij kot sta čas in temperatura površinske obdelave z GLYMO ter vpliv ut. % dodatka  - Fe2O3 na stabilnost disperzije nanodelcev TiO2. V tretjem delu doktorske… Advisors/Committee Members: Venturini, Peter.

Subjects/Keywords: TiO2; nanodelci; rutil; GLYMO; -Fe2O3; POSS; UV absorber; polimerni nanokompozit; TiO2; nanoparticles; rutile; GLYMO; -Fe2O3; POSS; UV absorber; polymer nanocomposite; info:eu-repo/classification/udc/620.168:[620.3:678.7:549.514.6](043.3)

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Godnjavec, J. (2012). VPLIV POVRŠINSKE OBDELAVE NANODELCEV TITANOVEGA DIOKSIDA RUTILNE KRISTALNE STRUKTURE NA UV ABSORPCIJSKE LASTNOSTI POLIMERNEGA NANOKOMPOZITA. (Doctoral Dissertation). Univerza v Mariboru. Retrieved from https://dk.um.si/IzpisGradiva.php?id=37160 ; https://dk.um.si/Dokument.php?id=48815&dn= ; https://plus.si.cobiss.net/opac7/bib/16199190?lang=sl

Chicago Manual of Style (16^th Edition):

Godnjavec, Jerneja. “VPLIV POVRŠINSKE OBDELAVE NANODELCEV TITANOVEGA DIOKSIDA RUTILNE KRISTALNE STRUKTURE NA UV ABSORPCIJSKE LASTNOSTI POLIMERNEGA NANOKOMPOZITA.” 2012. Doctoral Dissertation, Univerza v Mariboru. Accessed January 15, 2021. https://dk.um.si/IzpisGradiva.php?id=37160 ; https://dk.um.si/Dokument.php?id=48815&dn= ; https://plus.si.cobiss.net/opac7/bib/16199190?lang=sl.

MLA Handbook (7^th Edition):

Godnjavec, Jerneja. “VPLIV POVRŠINSKE OBDELAVE NANODELCEV TITANOVEGA DIOKSIDA RUTILNE KRISTALNE STRUKTURE NA UV ABSORPCIJSKE LASTNOSTI POLIMERNEGA NANOKOMPOZITA.” 2012. Web. 15 Jan 2021.

Vancouver:

Godnjavec J. VPLIV POVRŠINSKE OBDELAVE NANODELCEV TITANOVEGA DIOKSIDA RUTILNE KRISTALNE STRUKTURE NA UV ABSORPCIJSKE LASTNOSTI POLIMERNEGA NANOKOMPOZITA. [Internet] [Doctoral dissertation]. Univerza v Mariboru; 2012. [cited 2021 Jan 15]. Available from: https://dk.um.si/IzpisGradiva.php?id=37160 ; https://dk.um.si/Dokument.php?id=48815&dn= ; https://plus.si.cobiss.net/opac7/bib/16199190?lang=sl.

Council of Science Editors:

Godnjavec J. VPLIV POVRŠINSKE OBDELAVE NANODELCEV TITANOVEGA DIOKSIDA RUTILNE KRISTALNE STRUKTURE NA UV ABSORPCIJSKE LASTNOSTI POLIMERNEGA NANOKOMPOZITA. [Doctoral Dissertation]. Univerza v Mariboru; 2012. Available from: https://dk.um.si/IzpisGradiva.php?id=37160 ; https://dk.um.si/Dokument.php?id=48815&dn= ; https://plus.si.cobiss.net/opac7/bib/16199190?lang=sl

9. Ismail, Mehdi. Préparation et caractérisation de nouveaux matériaux pour les réactions de dépollution photocatalytique de l'eau dans le visible : Prepartion and characterization of new materials for reactions of water photocatalytic decontamination in the visible.

Degree: Docteur es, Génie des procédés et des produits, 2011, Vandoeuvre-les-Nancy, INPL; Institut National des Sciences Appliquées et de Technologie (Tunisie)

URL: http://www.theses.fr/2011INPL087N

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Le rôle de WO3 et de Fe2O3 dans l’amélioration de l'activité photocatalytique des dépôts de TiO2 a été étudié, à travers la dégradation de l'acide… (more)

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Le rôle de WO3 et de Fe2O3 dans l’amélioration de l'activité photocatalytique des dépôts de TiO2 a été étudié, à travers la dégradation de l'acide salicylique avec deux sources de lumière : UV et visible.Différentes procédures de couplage de semi-conducteurs ont été entreprises (imprégnation humide / mélange de semi-conducteurs à l'état solide / sol gel). Aussi différents substrats ont été testés (verre ordinaire, ITO).La spectrophotométrie UV-Visible (sans / avec sphère intégratrice), la diffraction des rayons X, la microscopie électronique à balayage et la caractérisation électrochimique ont été réalisées afin de mieux comprendre le comportement et le rôle des semi-conducteurs chargés.Des résultats prometteurs ont été trouvés pour les photocatalyseurs préparés par imprégnation humide et par mélange solide (addition de WO3): le gap d’énergie a diminué, l'activité sous la lumière visible a augmenté en conséquence (2,5% molaire de WO3) pour le premier cas. Une amélioration de 30% sous UV (0,5% WO3) a été atteinte pour le deuxième. La méthode Sol gel améliore le recouvrement sur le substrat de verre, elle semble être appropriée pour assurer un bon contact entre les semi-conducteurs et atteindre l’effet désiré : la séparation de charges. Le photocourant a été nettement augmenté avec l’addition de 4% de WO3 (substrat ITO), en cohérence avec le potentiel de circuit ouvert diminué. Cela confirme le rôle positif de WO3 dans la séparation de charges.Les dépôts Fe2O3-TiO2 préparés par imprégnation humide présentent une activité supérieure avec la lampe blanche comparant à la lampe UV (de 1 à 2% molaire de Fe2O3), l’effet positif de l’introduction du fer a également été observé avec la méthode sol gel. Le Fer sous sa forme ionique peut jouer un rôle positif dans le piégeage de charges, mais il peut former des phases allotropiques qui peuvent être des centres de recombinaison

The role of WO3 and Fe2O3 in enhancing the photocatalytic activity of TiO2 deposits has been investigated through the oxidation of salicylic acid using UV and vis-light irradiation. Different procedures of semiconductor loading (wet impregnation/mixing semiconductors in solid form/sol gel) and deposition were undertaken. Also different substrates were tested (ordinary glass, ITO).UV-Vis spectrophotometry (without/with Integrating sphere), X-ray powder diffraction, scanning electron microscopy and electrochemical characterization were done in order to better understand the behavior and the effective role of loaded semiconductors.Promising results were found for catalysts prepared by wet impregnation and mixing in solid form methods (WO3-loading): the bang gap energy decreased, activity under visible light increased consequently (at 2.5 % molar -WO3) for the first case. 30% improvement under UV (0.5 % -WO3) was reached for the second. Sol gel method enhances coverage on the glass substrate, it seems to be an appropriate method to ensure good contact between semiconductors and reach the charge separation desired effect. Enhanced photocurrent on the ITO…

Advisors/Committee Members: Zahraa, Orfan (thesis director), Bousselmi, Latifa (thesis director).

Subjects/Keywords: TiO2; WO3; Fe2O3; Bande interdite Eg; Acide salicylique; Photocatalyse; Sol gel; TiO2; WO3; Fe2O3; Band gap; Salicylic acid; Photocatalysis; Sol gel; 628.16; 541.35

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Ismail, M. (2011). Préparation et caractérisation de nouveaux matériaux pour les réactions de dépollution photocatalytique de l'eau dans le visible : Prepartion and characterization of new materials for reactions of water photocatalytic decontamination in the visible. (Doctoral Dissertation). Vandoeuvre-les-Nancy, INPL; Institut National des Sciences Appliquées et de Technologie (Tunisie). Retrieved from http://www.theses.fr/2011INPL087N

Chicago Manual of Style (16^th Edition):

Ismail, Mehdi. “Préparation et caractérisation de nouveaux matériaux pour les réactions de dépollution photocatalytique de l'eau dans le visible : Prepartion and characterization of new materials for reactions of water photocatalytic decontamination in the visible.” 2011. Doctoral Dissertation, Vandoeuvre-les-Nancy, INPL; Institut National des Sciences Appliquées et de Technologie (Tunisie). Accessed January 15, 2021. http://www.theses.fr/2011INPL087N.

MLA Handbook (7^th Edition):

Ismail, Mehdi. “Préparation et caractérisation de nouveaux matériaux pour les réactions de dépollution photocatalytique de l'eau dans le visible : Prepartion and characterization of new materials for reactions of water photocatalytic decontamination in the visible.” 2011. Web. 15 Jan 2021.

Vancouver:

Ismail M. Préparation et caractérisation de nouveaux matériaux pour les réactions de dépollution photocatalytique de l'eau dans le visible : Prepartion and characterization of new materials for reactions of water photocatalytic decontamination in the visible. [Internet] [Doctoral dissertation]. Vandoeuvre-les-Nancy, INPL; Institut National des Sciences Appliquées et de Technologie (Tunisie); 2011. [cited 2021 Jan 15]. Available from: http://www.theses.fr/2011INPL087N.

Council of Science Editors:

Ismail M. Préparation et caractérisation de nouveaux matériaux pour les réactions de dépollution photocatalytique de l'eau dans le visible : Prepartion and characterization of new materials for reactions of water photocatalytic decontamination in the visible. [Doctoral Dissertation]. Vandoeuvre-les-Nancy, INPL; Institut National des Sciences Appliquées et de Technologie (Tunisie); 2011. Available from: http://www.theses.fr/2011INPL087N

Univerzitet u Beogradu

10. Трпков, Ђорђе Б., 1981- 30684007. Хидротермална синтеза наночестичног хематита, структурна, морфолошка и магнетна својства.

Degree: Fakultet za fizičku hemiju, 2019, Univerzitet u Beogradu

URL: https://fedorabg.bg.ac.rs/fedora/get/o:20527/bdef:Content/get

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Физичка хемија - Физичка хемија материјала / Physical chemistry - Physical chemistry of materials

У овој докторској дисертацији описана је хидротермална синтеза наночестичног хематита (α-Fe2O3),… (more)

Subjects/Keywords: hydrothermal synthesis; iron oxide; hematite (α-Fe2O3); magnetic properties; self-assembl; TEM image analysis

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Трпков, Ђорђе Б., 1. 3. (2019). Хидротермална синтеза наночестичног хематита, структурна, морфолошка и магнетна својства. (Thesis). Univerzitet u Beogradu. Retrieved from https://fedorabg.bg.ac.rs/fedora/get/o:20527/bdef:Content/get

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Трпков, Ђорђе Б., 1981- 30684007. “Хидротермална синтеза наночестичног хематита, структурна, морфолошка и магнетна својства.” 2019. Thesis, Univerzitet u Beogradu. Accessed January 15, 2021. https://fedorabg.bg.ac.rs/fedora/get/o:20527/bdef:Content/get.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Трпков, Ђорђе Б., 1981- 30684007. “Хидротермална синтеза наночестичног хематита, структурна, морфолошка и магнетна својства.” 2019. Web. 15 Jan 2021.

Vancouver:

Трпков, Ђорђе Б. 13. Хидротермална синтеза наночестичног хематита, структурна, морфолошка и магнетна својства. [Internet] [Thesis]. Univerzitet u Beogradu; 2019. [cited 2021 Jan 15]. Available from: https://fedorabg.bg.ac.rs/fedora/get/o:20527/bdef:Content/get.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Трпков, Ђорђе Б. 13. Хидротермална синтеза наночестичног хематита, структурна, морфолошка и магнетна својства. [Thesis]. Univerzitet u Beogradu; 2019. Available from: https://fedorabg.bg.ac.rs/fedora/get/o:20527/bdef:Content/get

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Cambridge

11. Zheng, Yaoyao. Investigation of the conversion of fuels in the presence of solid oxygen carriers and the development of a plasma-assisted chemical looping system for H2 production.

Degree: PhD, 2018, University of Cambridge

URL: https://doi.org/10.17863/CAM.33343 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.763919

► The thesis, entitled 'Investigation of the conversion of fuels in the presence of solid oxygen carriers and the development of a plasma-assisted chemical looping system… (more)

▼ The thesis, entitled 'Investigation of the conversion of fuels in the presence of solid oxygen carriers and the development of a plasma-assisted chemical looping system for H2 production', presents the work of Yaoyao Zheng in the Department of Engineering, University of Cambridge, for the degree of Doctor of Philosophy. The thesis focused on chemical looping conversion of fuels, which employ oxygen carriers to supply oxygen, followed by the regeneration of the reduced oxygen carriers in air. Combustion of a Polish coal-derived char was first carried out in a fluidised bed reactor in the presence of Fe2O3 or ZrO2-supported Fe2O3. CO2 was introduced to the fluidised bed, to allow the char to be gasified in situ, prior to the reaction with the oxygen carriers. The presence of Fe2O3 did not alter the gasification step, given that the gasification of the char was free of external mass transfer limitation. A numerical model was developed to describe the gasification behaviour, as well as predicting the effect of CO on gasification. The inhibition effect of CO on char gasification was found more significant than expected. Combustion of biomass (wood pellets), by Fe2O3 or mayenite-supported CuO was studied in a fluidised bed. This was to understand how efficient the wood pellets were combusted by the oxygen carriers, as well as the distribution of the products. A tar measurement system, based on a plasma reactor, was first developed. With the developed measuring system, it was found that both Fe2O3 and mayenite-supported CuO were efficient for combusting wood pellets. Particularly, the CLOU nature of CuO makes mayenite-supported CuO a promising candidate for direct combustion, without introducing any reactive gaseous oxidant. The final part of the dissertation was focused on developing a plasma-assisted chemical looping system for H2-rich gas production (PCLH) from CH4 at mild temperatures (~ 673 K). SrFeO3-, Fe2O3, and Ni-doped SrFeO3- and Fe2O3 were investigated as the packing material. Total combustion of CH4 was observed in SrFeO3-. The addition of Ni onto SrFeO3- significantly improved the selectivity towards H2; whilst it was only active in the fresh cycle. Fe2O3 was found to be inert for converting CH4; however, the addition of Ni to form NiO/Fe2O3 dramatically improved H2 production and the reactivity maintained high for three redox cycles. The energy cost of such PCLH was comparable to that of water electrolysis.

Subjects/Keywords: 665.8; chemical looping; hydrogen production; gasification; fuel conversion; plasma-assisted processing; Ni-impregnated Fe2O3

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Zheng, Y. (2018). Investigation of the conversion of fuels in the presence of solid oxygen carriers and the development of a plasma-assisted chemical looping system for H2 production. (Doctoral Dissertation). University of Cambridge. Retrieved from https://doi.org/10.17863/CAM.33343 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.763919

Chicago Manual of Style (16^th Edition):

Zheng, Yaoyao. “Investigation of the conversion of fuels in the presence of solid oxygen carriers and the development of a plasma-assisted chemical looping system for H2 production.” 2018. Doctoral Dissertation, University of Cambridge. Accessed January 15, 2021. https://doi.org/10.17863/CAM.33343 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.763919.

MLA Handbook (7^th Edition):

Zheng, Yaoyao. “Investigation of the conversion of fuels in the presence of solid oxygen carriers and the development of a plasma-assisted chemical looping system for H2 production.” 2018. Web. 15 Jan 2021.

Vancouver:

Zheng Y. Investigation of the conversion of fuels in the presence of solid oxygen carriers and the development of a plasma-assisted chemical looping system for H2 production. [Internet] [Doctoral dissertation]. University of Cambridge; 2018. [cited 2021 Jan 15]. Available from: https://doi.org/10.17863/CAM.33343 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.763919.

Council of Science Editors:

Zheng Y. Investigation of the conversion of fuels in the presence of solid oxygen carriers and the development of a plasma-assisted chemical looping system for H2 production. [Doctoral Dissertation]. University of Cambridge; 2018. Available from: https://doi.org/10.17863/CAM.33343 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.763919

Universidade do Minho

12. Barros, Óscar José Maciel. Development of hyaluronic acid-doxorubicin nanogels .

Degree: 2016, Universidade do Minho

URL: http://hdl.handle.net/1822/44772

► Cancer is the leading cause of death in the world. Cancer research is continuously growing aiming to achieve more efficient therapies and early diagnostics. Different… (more)

▼ Cancer is the leading cause of death in the world. Cancer research is continuously growing aiming to achieve more efficient therapies and early diagnostics. Different challenges arise, concerning the development of efficient drug delivery systems compared to conventional therapies, such as chemotherapy. New formulations promoting a controlled drug distribution, potentiating selective and efficient pharmaceutical actions, have been developed. Nanogels, produced by self-assembly of chemical modified natural polymers, are suitable for this purpose since they are able to encapsulate the hydrophobic drugs, physically or chemically. The use of labile linkages, to stabilize drugs, allows a selective drug release, such as pH-sensitive hydrazone. Doxorubicin is a drug currently used in chemotherapy, however, a major drawback remains its toxicity to healthy tissues, when used in high dosages, and the development of multi-drug resistance during prolonged treatment. Doxorubicin can be conjugated with hyaluronic acid, a natural polymer abundant in the human body, via hydrazone or amide linkages. The main goals of this work consist in the development of hyaluronic acid-based nanogels for cancer therapy with doxorubicin, as well as the incorporation of 𝘺-Fe2O3 into the nanogels to develop a theranostic formulation. Chemical modifications were performed on the hyaluronic acid to obtain an amphiphilic polymer grafted with doxorubicin via hydrazone or amide linkage. Doxorubicin content, average size and polydispersity index were evaluated. The most promising nanogels were further characterized concerning release profile at different pH, cytotoxicity and physical incorporation of 𝘺-Fe2O3. Hyaluronic acid-doxorubicin conjugates, via hydrazone, were produced in PBS pH 7.4, containing 22 μg DOX/mg, an average size of 100 nm and a polydispersity index around 0.5. The conjugation, via amide, was performed in DMSO, leading to a doxorubicin content of 29 μg DOX/mg, an average size of 70 nm and a polydispersity index around 0.45. The release studies indicated a satisfactory release at pH 5.0 (lysosomal pH) although exhibiting some release at pH 7.4 (extracellular pH). 𝘺-Fe2O3 stabilization into nanogels, designed as nanomagnetogels, lead to 0.6-0.9 mM of stabilized 𝘺-Fe2O3. Concerning the cytotoxicity assay performed using A549 cell line, hyaluronic acid-doxorubicin conjugate via amide presented a fast action and promoted a decrease in cell viability. In summary, hyaluronic acid-doxorubicin nanogels were produced using a pH-sensitive linkage, hydrazone, and amide linkage. The nanogels exhibited interesting characteristics for drug delivery applications envisaging more effective therapies, even though further optimizations are required. 𝘺-Fe2O3 incorporation was accomplished allowing imaging detection for diagnostic purposes or therapy evaluation along with the controlled drug release. Advisors/Committee Members: Gonçalves, Catarina (advisor), Gama, F. M (advisor).

Subjects/Keywords: Hyaluronic acid; Doxorubicin; Self-assembled nanogels; 𝘺-Fe2O3; Theranostics; Ácido hialurónico; Doxorrubicina; Nanogéis auto-organizados; Teranósticos

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Barros, �. J. M. (2016). Development of hyaluronic acid-doxorubicin nanogels . (Masters Thesis). Universidade do Minho. Retrieved from http://hdl.handle.net/1822/44772

Chicago Manual of Style (16^th Edition):

Barros, Óscar José Maciel. “Development of hyaluronic acid-doxorubicin nanogels .” 2016. Masters Thesis, Universidade do Minho. Accessed January 15, 2021. http://hdl.handle.net/1822/44772.

MLA Handbook (7^th Edition):

Barros, Óscar José Maciel. “Development of hyaluronic acid-doxorubicin nanogels .” 2016. Web. 15 Jan 2021.

Vancouver:

Barros �JM. Development of hyaluronic acid-doxorubicin nanogels . [Internet] [Masters thesis]. Universidade do Minho; 2016. [cited 2021 Jan 15]. Available from: http://hdl.handle.net/1822/44772.

Council of Science Editors:

Barros �JM. Development of hyaluronic acid-doxorubicin nanogels . [Masters Thesis]. Universidade do Minho; 2016. Available from: http://hdl.handle.net/1822/44772

Univerzitet u Beogradu

13. Džunuzović, Enis S., 1971-. Dobijanje nanokompozita na bazi termoplastičnih polimera i uticaj nanočestica oksida titana i gvožđa na njihova svojstva.

Degree: Tehnološko-metalurški fakultet, 2014, Univerzitet u Beogradu

URL: https://fedorabg.bg.ac.rs/fedora/get/o:6830/bdef:Content/get

►

Hemija I hemijska tehnologija - fizička hemija makromolekula / Chemistry and chemical technology - Physical chemistry of macromolecules

U ovoj disertaciji prikazan je postupak dobijanja… (more)

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Hemija I hemijska tehnologija - fizička hemija makromolekula / Chemistry and chemical technology - Physical chemistry of macromolecules

U ovoj disertaciji prikazan je postupak dobijanja polimernih nanokompozita in situ polimerizacijom monomera u prisustvu čestica punila. Kao punilo korišćene su nanočestice TiO2 i α-Fe2O3. Polimerni nanokompoziti poli(metil metakrilata) i TiO2 dobijeni su polimerizacijom metil metakrilata preko slobodnih radikala u rastvoru, u masi i u suspenziji, dok su nanokompoziti poli(metil metakrilata) i α-Fe2O3 dobijeni polimerizacijom preko slobodnih radikala u masi. Nanokompoziti poli(stirena) i TiO2 su dobijeni polimerizacijom stirena preko slobodnih radikala u masi. Površinska modifikacija nanočestica TiO2, dobijenih kontrolisanom hidrolizom TiCl4, izvršena je sa pet različitih jedinjenja - palmitatom askorbinske kiseline, oktil galatom, decil galatom, lauril galatom i cetil galatom. Kao punilo su korišćene dve vrste α-Fe2O3 čestica, u obliku štapića i u obliku kocki, dobijene forsiranom hidrolizom FeCl3. Površinskom modifikacijom nanočestica TiO2 izvršena je njihova hidrofobizacija što je omogućilo njihovo prebacivanje iz vodene sredine u organsku fazu, odnosno monomere metil metakrilat i stiren. Palmitat askorbinske kiseline i estri galne kiseline su se preko OH grupa hemijski vezali za površinu TiO2 čestica, što je rezultiralo pomeranjem apsorpcionog spektra površinski modifikovanih čestica TiO2 ka većim talasnim dužinama u odnosu na spektar TiO2 koloida. Karakterizacija površinski modifikovanih čestica TiO2 izvršena je apsorpcionom UV i FTIR spektroskopijom. Kristalna struktura sintetisanih α-Fe2O3 čestica određena je na osnovu difrakcije rendgenskih zraka, a veličina i oblik čestica su određeni pomoću transmisione elektronske mikroskopije. Karakterizacija dobijenih polimernih kompozita izvršena je UV i NMR spektroskopijom i transmisionom elektronskom mikroskopijom. Molarne mase poli(metil metakrilata) i poli(stirena), čistih i ekstrahovanih iz kompozitnih uzoraka, određene su korišćenjem gel propusne hromatografije i viskozimetrijske metode. Termička svojstva dobijeni polimernih nanokompozita ispitivana su termogravimetrijskom analizom i diferencijalnom skenirajućom kalorimetrijom. Cilj ovog rada je bio da se ispita uticaj načina sinteze polimerne matrice, vrste, veličine, oblika, načina površinske modifikacije i koncentracije oksidnih čestica punila na svojstva dobijenih polimernih nanokompozita. Dobijeni rezultati su pokazali da su površinski modifikovane nanočestice TiO2 i nanočestice α-Fe2O3 u obliku štapića, prisutne u toku polimerizacije MMA, uticale na reakcije terminacije pa samim tim i na molarne mase dobijenog PMMA. Čestice α-Fe2O3 u obliku kocki, prisutne u toku polimerizacije MMA, nemaju uticaj na reakcije terminacije pa ni na molarne mase dobijenog PMMA. Nanočestice TiO2 i α-Fe2O3 nisu dovele do značajnije promene vrednosti temperature ostakljivanja PMMA, što je ukazalo na slabu interakciju između čestica punila i PMMA matrice. Površinski modifikovane nanočestice TiO2,…

Advisors/Committee Members: Jeremić, Katarina, 1950-.

Subjects/Keywords: TiO2 nanoparticles; α-Fe2O3 particles; surface modification; ascorbic acid palmitate; gallic acid esters; polymer nanocomposites; PMMA; PS

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Džunuzović, Enis S., 1. (2014). Dobijanje nanokompozita na bazi termoplastičnih polimera i uticaj nanočestica oksida titana i gvožđa na njihova svojstva. (Thesis). Univerzitet u Beogradu. Retrieved from https://fedorabg.bg.ac.rs/fedora/get/o:6830/bdef:Content/get

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Džunuzović, Enis S., 1971-. “Dobijanje nanokompozita na bazi termoplastičnih polimera i uticaj nanočestica oksida titana i gvožđa na njihova svojstva.” 2014. Thesis, Univerzitet u Beogradu. Accessed January 15, 2021. https://fedorabg.bg.ac.rs/fedora/get/o:6830/bdef:Content/get.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Džunuzović, Enis S., 1971-. “Dobijanje nanokompozita na bazi termoplastičnih polimera i uticaj nanočestica oksida titana i gvožđa na njihova svojstva.” 2014. Web. 15 Jan 2021.

Vancouver:

Džunuzović, Enis S. 1. Dobijanje nanokompozita na bazi termoplastičnih polimera i uticaj nanočestica oksida titana i gvožđa na njihova svojstva. [Internet] [Thesis]. Univerzitet u Beogradu; 2014. [cited 2021 Jan 15]. Available from: https://fedorabg.bg.ac.rs/fedora/get/o:6830/bdef:Content/get.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Džunuzović, Enis S. 1. Dobijanje nanokompozita na bazi termoplastičnih polimera i uticaj nanočestica oksida titana i gvožđa na njihova svojstva. [Thesis]. Univerzitet u Beogradu; 2014. Available from: https://fedorabg.bg.ac.rs/fedora/get/o:6830/bdef:Content/get

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

14. BAO JI. A study of a-Fe2O3 thin films for the oxygen evolution reaction in water photolysis.

Degree: 2010, National University of Singapore

URL: http://scholarbank.nus.edu.sg/handle/10635/22084

Subjects/Keywords: Fe2O3 Thin Film; Water Photolysis; Photocatalyst; Electrodeposition; Calciantion; Sustainable

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

JI, B. (2010). A study of a-Fe2O3 thin films for the oxygen evolution reaction in water photolysis. (Thesis). National University of Singapore. Retrieved from http://scholarbank.nus.edu.sg/handle/10635/22084

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

JI, BAO. “A study of a-Fe2O3 thin films for the oxygen evolution reaction in water photolysis.” 2010. Thesis, National University of Singapore. Accessed January 15, 2021. http://scholarbank.nus.edu.sg/handle/10635/22084.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

JI, BAO. “A study of a-Fe2O3 thin films for the oxygen evolution reaction in water photolysis.” 2010. Web. 15 Jan 2021.

Vancouver:

JI B. A study of a-Fe2O3 thin films for the oxygen evolution reaction in water photolysis. [Internet] [Thesis]. National University of Singapore; 2010. [cited 2021 Jan 15]. Available from: http://scholarbank.nus.edu.sg/handle/10635/22084.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

JI B. A study of a-Fe2O3 thin films for the oxygen evolution reaction in water photolysis. [Thesis]. National University of Singapore; 2010. Available from: http://scholarbank.nus.edu.sg/handle/10635/22084

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of South Africa

15. Mathevula, Langutani Eulenda. Optical and magnetic properties of rare earth Doped α-Fe2O3 for future bio-imaging applications .

Degree: 2018, University of South Africa

URL: http://hdl.handle.net/10500/26881

► Imaging techniques have been developed for decades for the detection of biomolecules in biomedicine cells, in vitro or in living cells and organisms. The application… (more)

▼ Imaging techniques have been developed for decades for the detection of biomolecules in biomedicine cells, in vitro or in living cells and organisms. The application however, often constrained by the available probes, whose optical properties may limit the imaging possibilities. It is very essential to improve the sensitivity of these devices by enhancing efficiency to detection. Recently, Fe3O4 has been used primarily in cancer theranostic application such as magnetic resonance imaging (MRI). However, its toxicity towards normal cells has been pointed out by scientific communities, when they are involved in in vitro (helics) cancer treatment. In this work, we have chosen to use α-Fe2O3, because it has proven to be less toxic than Fe3O4. Hematite is antiferromagnetic (AFM) at room temperature with a small canted moment lying within the crystal symmetry plane. At low temperature, hematite undergoes a magnetic phase transition from weak ferromagnetic (WFM) to a pure antiferromagnetic configuration (AF), which is known as the Morin transition. This magnetic property makes it possible for hematite to be applied in imaging technique. To enhance the optical properties, the α-Fe2O3 is doped with lanthanide ions due to their unique optical properties. Incorporation of these rare earth ions, enable the α-Fe2O3 to have enhance luminescence properties. Imaging techniques have been developed for decades for the detection of biomolecules in biomedicine cells, in vitro or in living cells and organisms. The application however, often constrained by the available probes, whose optical properties may limit the imaging possibilities. It is very essential to improve the sensitivity of these devices by enhancing efficiency to detection. Recently, Fe3O4 has been used primarily in cancer theranostic application such as magnetic resonance imaging (MRI). However, its toxicity towards normal cells has been pointed out by scientific communities, when they are involved in in vitro (helics) cancer treatment. In this work, we have chosen to use α-Fe2O3, because it has proven to be less toxic than Fe3O4. Hematite is antiferromagnetic (AFM) at room temperature with a small canted moment lying within the crystal symmetry plane. At low temperature, hematite undergoes a magnetic phase transition from weak ferromagnetic (WFM) to a pure antiferromagnetic configuration (AF), which is known as the Morin transition. This magnetic property makes it possible for hematite to be applied in imaging technique. To enhance the optical properties, the α-Fe2O3 is doped with lanthanide ions due to their unique optical properties. Incorporation of these rare earth ions, enable the α-Fe2O3 to have enhance luminescence properties. These lanthanide-doped nanoparticles (UCNPs) undergoes up-conversion process which have remarkable ability to combine two or more low energy photons to generate a singly high energy photon by an anti-stokes process and hold great promise for bio-imaging. These nanoparticles exhibit excellent photostability,…

Subjects/Keywords: α-Fe2O3; Intrinsic defect; Extrinsic defect; sol-gel; Microwave; Band gap; Thermoluminescence; Lanthanides; Photoluminescence,; Up-conversion; ,Magnetic properties

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Mathevula, L. E. (2018). Optical and magnetic properties of rare earth Doped α-Fe2O3 for future bio-imaging applications . (Doctoral Dissertation). University of South Africa. Retrieved from http://hdl.handle.net/10500/26881

Chicago Manual of Style (16^th Edition):

Mathevula, Langutani Eulenda. “Optical and magnetic properties of rare earth Doped α-Fe2O3 for future bio-imaging applications .” 2018. Doctoral Dissertation, University of South Africa. Accessed January 15, 2021. http://hdl.handle.net/10500/26881.

MLA Handbook (7^th Edition):

Mathevula, Langutani Eulenda. “Optical and magnetic properties of rare earth Doped α-Fe2O3 for future bio-imaging applications .” 2018. Web. 15 Jan 2021.

Vancouver:

Mathevula LE. Optical and magnetic properties of rare earth Doped α-Fe2O3 for future bio-imaging applications . [Internet] [Doctoral dissertation]. University of South Africa; 2018. [cited 2021 Jan 15]. Available from: http://hdl.handle.net/10500/26881.

Council of Science Editors:

Mathevula LE. Optical and magnetic properties of rare earth Doped α-Fe2O3 for future bio-imaging applications . [Doctoral Dissertation]. University of South Africa; 2018. Available from: http://hdl.handle.net/10500/26881

Delft University of Technology

16. Enache, C.S. Characterization of Thin Film Photoanodes for Solar Water Splitting.

Degree: 2012, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:b838e009-91d2-4fcb-81bd-1587cc850335 ; urn:NBN:nl:ui:24-uuid:b838e009-91d2-4fcb-81bd-1587cc850335 ; urn:NBN:nl:ui:24-uuid:b838e009-91d2-4fcb-81bd-1587cc850335 ; http://resolver.tudelft.nl/uuid:b838e009-91d2-4fcb-81bd-1587cc850335

► For centuries, mankind has mostly used fossil fuels, i.e., natural gas, coal, and oil for its energy needs. With the fast rise of the world… (more)

▼ For centuries, mankind has mostly used fossil fuels, i.e., natural gas, coal, and oil for its energy needs. With the fast rise of the world population and the rising standards of living in the developing countries, the amount of energy the world is going to need in the coming decades will grow enormously. Due to environmental concerns and the need to secure the energy supply, more actions have to be taken in the development and implementation of cleaner technologies, based on solar, wind, geothermal power, and biomass, combined with storage technologies such as batteries and hydrogen. Moreover, to fulfill the future global energy demand, all of the available energy sources will be needed. Despite the fact that solar energy is abundant, clean, and widely available, only a small percentage of this energy is utilized through conversion to electricity by photovoltaic systems. This is partly due to the need for smart technological inventions to make the alternative energy cost-effective and competitive with the conventional energy production. The Netherlands intends to increase the percentage of energy produced by sustainable sources from 4% nowadays to 20% in 2020. When considering sustainable energy production, also energy storage has to be investigated, since especially solar and wind energy are not continuous. In the chain of solar energy production and the need for energy storage, hydrogen is a promising storage candidate due to its high gravimetric energy density and its nonpollutive combustion product, water. Nowadays, hydrogen can be produced by a number of processes, such as electrolysis of water, steam reforming of natural gas, and biomass conversion, which directly or indirectly release large amounts of carbon dioxide into the atmosphere. An elegant alternative will be the use of solar energy for the electrolysis of water in a photoelectrochemical cell. Direct photoelectrolysis has the potential to be economically more attractive than coupled systems of photovoltaic cells and electrolysers. Additional information regarding this subject can be found in Chapter 1, as well as the necessary requirements for the photoelectrodes. In this thesis three different metal oxides, TiO2, InVO4, and Fe2O3 are investigated as photoanodes for water splitting applications. The aim of the research presented in this thesis is two-fold. First, the use of low-cost deposition techniques for the preparation of efficient thin-film photoanodes is explored. Special attention is given to the possibility to introduce dopants in a controlled manner. Second, the influence of the presence of ionic point defects on the photoelectrochemical performance of the materials is investigated. Titanium dioxide has long been considered as one of the most promising semiconductors for photoelectrolysis applications due to its low cost, non-toxicity, and excellent stability against corrosion. However, because of its wide bandgap (3.2 eV for anatase) the utilization of TiO2 typically remains confined to the UV light region, which constitutes only a small… Advisors/Committee Members: Schoonman, J., Van de Krol, R..

Subjects/Keywords: thin films; photoelectrodes; photoelectrolysis; electrodeposition; TiO2; Fe2O3; InVO4

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Enache, C. S. (2012). Characterization of Thin Film Photoanodes for Solar Water Splitting. (Doctoral Dissertation). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:b838e009-91d2-4fcb-81bd-1587cc850335 ; urn:NBN:nl:ui:24-uuid:b838e009-91d2-4fcb-81bd-1587cc850335 ; urn:NBN:nl:ui:24-uuid:b838e009-91d2-4fcb-81bd-1587cc850335 ; http://resolver.tudelft.nl/uuid:b838e009-91d2-4fcb-81bd-1587cc850335

Chicago Manual of Style (16^th Edition):

Enache, C S. “Characterization of Thin Film Photoanodes for Solar Water Splitting.” 2012. Doctoral Dissertation, Delft University of Technology. Accessed January 15, 2021. http://resolver.tudelft.nl/uuid:b838e009-91d2-4fcb-81bd-1587cc850335 ; urn:NBN:nl:ui:24-uuid:b838e009-91d2-4fcb-81bd-1587cc850335 ; urn:NBN:nl:ui:24-uuid:b838e009-91d2-4fcb-81bd-1587cc850335 ; http://resolver.tudelft.nl/uuid:b838e009-91d2-4fcb-81bd-1587cc850335.

MLA Handbook (7^th Edition):

Enache, C S. “Characterization of Thin Film Photoanodes for Solar Water Splitting.” 2012. Web. 15 Jan 2021.

Vancouver:

Enache CS. Characterization of Thin Film Photoanodes for Solar Water Splitting. [Internet] [Doctoral dissertation]. Delft University of Technology; 2012. [cited 2021 Jan 15]. Available from: http://resolver.tudelft.nl/uuid:b838e009-91d2-4fcb-81bd-1587cc850335 ; urn:NBN:nl:ui:24-uuid:b838e009-91d2-4fcb-81bd-1587cc850335 ; urn:NBN:nl:ui:24-uuid:b838e009-91d2-4fcb-81bd-1587cc850335 ; http://resolver.tudelft.nl/uuid:b838e009-91d2-4fcb-81bd-1587cc850335.

Council of Science Editors:

Enache CS. Characterization of Thin Film Photoanodes for Solar Water Splitting. [Doctoral Dissertation]. Delft University of Technology; 2012. Available from: http://resolver.tudelft.nl/uuid:b838e009-91d2-4fcb-81bd-1587cc850335 ; urn:NBN:nl:ui:24-uuid:b838e009-91d2-4fcb-81bd-1587cc850335 ; urn:NBN:nl:ui:24-uuid:b838e009-91d2-4fcb-81bd-1587cc850335 ; http://resolver.tudelft.nl/uuid:b838e009-91d2-4fcb-81bd-1587cc850335

Université de Bordeaux I

17. Pinho, Sonia Luzia Claro. Nanoparticules multifonctionelles pour la résonance magnétique et l'imagerie fluorescente : Multifunctional nanoparticles for MR and fluorescence imaging.

Degree: Docteur es, Physico-Chimie de la Matière Condensée, 2011, Université de Bordeaux I

URL: http://www.theses.fr/2011BOR14399

►

Cette thèse décrit une stratégie de synthèse de nouvelles générations des nanoparticules (NPs) pour applications biomédicales, visant à une amélioration de leurs performances pour l’imagerie,… (more)

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Cette thèse décrit une stratégie de synthèse de nouvelles générations des nanoparticules (NPs) pour applications biomédicales, visant à une amélioration de leurs performances pour l’imagerie, le diagnostic thérapeutique. Ces NPs présentent plusieurs fonctionnalités leur permettant de réaliser des tâches multiples. Deux types de sondes bimodales ont été développés et étudiés afin d'évaluer leur potentiel comme agents (1) de contraste en IRM et (2) luminescents. Ces objetscombinent les propriétés des complexes de lanthanide (Ln3+) et celles des NPs de silice ou de type coeur-écorce Fe2O3@SiO2 pour une imagerie bimodale. Ces NPs testées sur des cellules vivantes ont permis d’illustrer la preuve du concept aussi bien en IRM avec une augmentation d'intensité des images et un impact significatif sur les relaxivities r1, r2 et r2* qu’en photoluminescence. L’étude du système coeur-écorce a montré que l’influence du contrôle fin de l’écorce autour du noyau d'oxyde de fer a pu être modélisée.

This thesis describes a strategy of synthesis of new generations of nanoparticles (NPs) for biomedical applications, aiming at an improvement of their performances for the imaging, and the therapeutic diagnosis. These NPs present several functionalities enabling them to carry out multiple tasks. Two types of bimodal probes were developed and studied so as to evaluate their potential as contrast agents (1) in MRI and (2) and luminescence. These objects combine the properties of the lanthanide complexes (Ln3+) and those of NPs of silica or core/shell Fe2O3@SiO2 for a bimodal imaging. These NPs tested on living cells were able to illustrate the proof of the concept not only in MRI with an increase of intensity of the images and a significant impact on the relaxivities r1, r 2 and r2* but also in photoluminescence. The study of the core/shell system showed that the influence of the fine control of the shell around the iron oxide core could be modeled.

Advisors/Committee Members: Delville, Marie-Hélène (thesis director), Rocha, João (thesis director).

Subjects/Keywords: Nanoparticules multifunctionelles; Coeur-écorce/couronne; Fe2O3; Lanthanides; Agents de contraste IRM; Agents de contraste optiques; Relaxométrie; RMRD; Photoluminescence; Multifunctional nanoparticles; Core-shell/corona; Fe2O3; Lanthanides; MRI contrast agents; Optical contrast agents; Relaxometry; RMRD; Photoluminescence

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APA (6^th Edition):

Pinho, S. L. C. (2011). Nanoparticules multifonctionelles pour la résonance magnétique et l'imagerie fluorescente : Multifunctional nanoparticles for MR and fluorescence imaging. (Doctoral Dissertation). Université de Bordeaux I. Retrieved from http://www.theses.fr/2011BOR14399

Chicago Manual of Style (16^th Edition):

Pinho, Sonia Luzia Claro. “Nanoparticules multifonctionelles pour la résonance magnétique et l'imagerie fluorescente : Multifunctional nanoparticles for MR and fluorescence imaging.” 2011. Doctoral Dissertation, Université de Bordeaux I. Accessed January 15, 2021. http://www.theses.fr/2011BOR14399.

MLA Handbook (7^th Edition):

Pinho, Sonia Luzia Claro. “Nanoparticules multifonctionelles pour la résonance magnétique et l'imagerie fluorescente : Multifunctional nanoparticles for MR and fluorescence imaging.” 2011. Web. 15 Jan 2021.

Vancouver:

Pinho SLC. Nanoparticules multifonctionelles pour la résonance magnétique et l'imagerie fluorescente : Multifunctional nanoparticles for MR and fluorescence imaging. [Internet] [Doctoral dissertation]. Université de Bordeaux I; 2011. [cited 2021 Jan 15]. Available from: http://www.theses.fr/2011BOR14399.

Council of Science Editors:

Pinho SLC. Nanoparticules multifonctionelles pour la résonance magnétique et l'imagerie fluorescente : Multifunctional nanoparticles for MR and fluorescence imaging. [Doctoral Dissertation]. Université de Bordeaux I; 2011. Available from: http://www.theses.fr/2011BOR14399

18. Cristiane Alves Sierra Pereira. Catalisadores de CuO, Fe2O3 ou Co3O4 suportados em TiO2, CeO2 ou ZrO2: preparação via Sol-gel in situ ou impregnação e avaliação na redução de NO com CO.

Degree: 2012, Universidade Federal de São Carlos

URL: http://www.bdtd.ufscar.br/htdocs/tedeSimplificado//tde_busca/arquivo.php?codArquivo=5129

►

A minimização das emissões de óxidos de nitrogênio (NOx) é assunto de interesse crucial, pois geram graves problemas ambientais que afetam à saúde humana, à… (more)

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A minimização das emissões de óxidos de nitrogênio (NOx) é assunto de interesse crucial, pois geram graves problemas ambientais que afetam à saúde humana, à flora e à fauna. Para abater os NOx, processos envolvendo à sua redução catalítica apresentam forte potencial. No caso da redução catalítica de NO com CO, tem-se a vantagem adicional de minimizar as emissões de ambos poluentes. Para a obtenção de catalisadores eficientes e estáveis para essa reação, muitos estudos têm sido desenvolvidos no sentido de aumentar a atividade por meio de uma interação metalsuporte mais favorável ao processo reativo e de se conseguir uma melhor distribuição da fase ativa no suporte. Nesse contexto, o objetivo do presente estudo foi preparar catalisadores para a redução de NO com CO à base de óxido de Cu, Fe ou Co, suportados em TiO2, CeO2 ou ZrO2, com a adição do precursor da fase ativa durante a preparação do suporte via processo sol-gel (adição in situ). Além disso, catalisadores de mesma composição foram preparados por rotas convencionais. Resultados de medidas de adsorção/dessorção de N2 dos suportes mostram que o método sol-gel utilizado é mais eficiente no preparo de suportes com propriedades texturais melhoradas. Análises de RTP-H2 e ERD-UVVIS evidenciaram a presença dos óxidos de Cu, Fe ou Co em todos os catalisadores, os quais, em sua maioria, não apresentaram picos de difração de raios X característicos dessas fases, o que sugeriu sua alta dispersão no suporte. Em geral, os resultados da redução de NO a N2 com CO mostraram que os catalisadores preparados pelo método sol-gel in situ são tão ativos quanto os catalisadores preparados por métodos convencionais, o que demonstra o forte potencial desse procedimento, que resulta no uso de um número menor de etapas na preparação do catalisador, com a consequente economia de tempo e energia. De maneira geral, dentre os suportes estudados a céria mostrou uma relação metal-suporte mais favorável ao processo de óxidoredução. Os catalisadores 6,5Cu/CeP, 5,5Cu-ZrSG e 8,4Fe/TiC, na presença de O2, SO2 e vapor de água não apresentaram alteração significativa da sua atividade e seletividade, mostrando uma alta estabilidade para atuar sob as drásticas condições dos processos reais.

The minimization of the emissions of nitrogen oxides (NOx) is a subject of crucial interest, since them cause serious environmental problems which affect human health, vegetation and fauna. With the purpose to abate NOx, processes involving their catalytic reduction show strong potential. In the case of the reduction of NO with CO a meaningful advantage arises, once both pollutants are removed simultaneously. In order to obtain efficient and stable catalysts for this reaction, many studies have been done with the aim to improve the catalytic activity by achieving a better favorable metal-support interaction to the occurrence of the reaction and a better distribution of the active phases on the support. In this context, the objective of this study was to prepare Cu, Fe and Co based catalysts supported on TiO2,…

Advisors/Committee Members: Ernesto Antonio Urquieta-González.

Subjects/Keywords: Engenharia química; Abatimento de NO; Redução (Química); Sol-gel - método; Óxidos metálicos; CO; Sol-gel, In situ; CuO; Fe2O3; Co3O4; TiO2; CeO2; ZrO2; ENGENHARIA QUIMICA; Abatement; Reduction; NO; CO; Sol-ge; In situ; CuO; Fe2O3; Co3O4; TiO2; CeO2; ZrO2

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Pereira, C. A. S. (2012). Catalisadores de CuO, Fe2O3 ou Co3O4 suportados em TiO2, CeO2 ou ZrO2: preparação via Sol-gel in situ ou impregnação e avaliação na redução de NO com CO. (Thesis). Universidade Federal de São Carlos. Retrieved from http://www.bdtd.ufscar.br/htdocs/tedeSimplificado//tde_busca/arquivo.php?codArquivo=5129

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Pereira, Cristiane Alves Sierra. “Catalisadores de CuO, Fe2O3 ou Co3O4 suportados em TiO2, CeO2 ou ZrO2: preparação via Sol-gel in situ ou impregnação e avaliação na redução de NO com CO.” 2012. Thesis, Universidade Federal de São Carlos. Accessed January 15, 2021. http://www.bdtd.ufscar.br/htdocs/tedeSimplificado//tde_busca/arquivo.php?codArquivo=5129.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Pereira, Cristiane Alves Sierra. “Catalisadores de CuO, Fe2O3 ou Co3O4 suportados em TiO2, CeO2 ou ZrO2: preparação via Sol-gel in situ ou impregnação e avaliação na redução de NO com CO.” 2012. Web. 15 Jan 2021.

Vancouver:

Pereira CAS. Catalisadores de CuO, Fe2O3 ou Co3O4 suportados em TiO2, CeO2 ou ZrO2: preparação via Sol-gel in situ ou impregnação e avaliação na redução de NO com CO. [Internet] [Thesis]. Universidade Federal de São Carlos; 2012. [cited 2021 Jan 15]. Available from: http://www.bdtd.ufscar.br/htdocs/tedeSimplificado//tde_busca/arquivo.php?codArquivo=5129.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Pereira CAS. Catalisadores de CuO, Fe2O3 ou Co3O4 suportados em TiO2, CeO2 ou ZrO2: preparação via Sol-gel in situ ou impregnação e avaliação na redução de NO com CO. [Thesis]. Universidade Federal de São Carlos; 2012. Available from: http://www.bdtd.ufscar.br/htdocs/tedeSimplificado//tde_busca/arquivo.php?codArquivo=5129

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

19. Džunuzović Enis. Preparation of nanocomposites based on thermoplastic polymers and influence of titanium and iron oxides nanoparticles on their properties.

Degree: PhD, Technology and Metallurgy, 2010, University of Belgrade

URL: http://dx.doi.org/10.2298/BG20100713DZUNUZOVIC ; http://eteze.bg.ac.rs/application/showtheses?thesesId=641 ; https://fedorabg.bg.ac.rs/fedora/get/o:6830/bdef:Content/get ; http://vbs.rs/scripts/cobiss?command=SEARCH&base=99999&select=ID=37200143

► The synthesis of polymer nanocomposites by in situ polymerization of monomers in the presence of filler particles is presented in this dissertation. Nanoparticles of TiO2… (more)

▼ The synthesis of polymer nanocomposites by in situ polymerization of monomers in the presence of filler particles is presented in this dissertation. Nanoparticles of TiO2 and α-Fe2O3 were used as fillers. Polymer nanocomposites of poly(methyl methacrylate) and TiO2 were obtained by radical polymerization of methyl methacrylate in solution, bulk and suspension, while nanocomposites of poly(methyl methacrylate) and α-Fe2O3 and poly(styrene) and TiO2 were prepared by radical polymerization in bulk. Surface modification of TiO2 nanoparticles, obtained by control hydrolysis of TiCl4, was performed using five different compounds- ascorbic acid palmitate, octyl gallate, decyl gallate, lauryl gallate and cetyl gallate. The α-Fe2O3 particles were obtained by forced hydrolysis of FeCl3 and depending on the conditions of the reaction they were in the shape of rods or cubes. Surface modification of TiO2 nanoparticles allows the extraction of the TiO2 nanoparticles from water into organic phase, methyl methacrylate and styrene, due to the increased hydrophobic character of the modified particles. Ascorbic acid palmitate and gallic acid esters were chemically bonded to the surface of TiO2 particles through –OH groups, which resulted in the red-shift of the absorption spectrum of the surface modified TiO2 particles compared to the non-modified ones. Characterization of surface modified TiO2 particles was performed using absorption UV and FTIR spectroscopy. Crystal structure of the synthesized α-Fe2O3 particles was determined from the X-ray diffraction measurements, while size and shape of the particles were determined using transmission electron microscopy. Characterization of the obtained polymer composites was done using UV and NMR spectroscopy and transmission electron microscopy. Molar masses of poly(methyl methacrylate) and poly(styrene) samples, pure and extracted from the composites, were determined by gel permeation chromatography and viscosimetry. Thermal properties of the synthesized polymer nanocomposites were investigated by thermogravimetric analysis and differential scanning calorimetry, The goal of this study was to examine the influence of methods of synthesis of polymer matrix, and the influence of nature, size, shape, surface modification method and concentration of filler particles on the properties of the obtained polymer nanocomposites. The obtained results showed that surface modified TiO2 nanoparticles and α-Fe2O3 nanorods, present during the polymerization of MMA, influenced the termination reactions and thus the molar masses of the obtained PMMA. Cubic α-Fe2O3 particles, present during the polymerization of MMA, did not have the influence on the termination reactions and molar masses of obtained PMMA. The presence of TiO2 and α-Fe2O3 nanoparticles did not lead to significant changes of glass transition temperature of PMMA, indicating weak interactions between filler particles and PMMA matrix. Surface modified TiO2 nanoparticles, present during the polymerization of styrene, did not influence molar masses of…

Subjects/Keywords: TiO2 nanoparticles; α-Fe2O3 particles; surface modification; ascorbic acid palmitate; gallic acid esters; polymer nanocomposites; PMMA; PS; nanočestice TiO2; α-Fe2O3; površinska modifikacija; palmitat askorbinske kiseline; estri galne kiseline; polimerni nanokompoziti; PMMA; PS

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Enis, D. (2010). Preparation of nanocomposites based on thermoplastic polymers and influence of titanium and iron oxides nanoparticles on their properties. (Doctoral Dissertation). University of Belgrade. Retrieved from http://dx.doi.org/10.2298/BG20100713DZUNUZOVIC ; http://eteze.bg.ac.rs/application/showtheses?thesesId=641 ; https://fedorabg.bg.ac.rs/fedora/get/o:6830/bdef:Content/get ; http://vbs.rs/scripts/cobiss?command=SEARCH&base=99999&select=ID=37200143

Chicago Manual of Style (16^th Edition):

Enis, Džunuzović. “Preparation of nanocomposites based on thermoplastic polymers and influence of titanium and iron oxides nanoparticles on their properties.” 2010. Doctoral Dissertation, University of Belgrade. Accessed January 15, 2021. http://dx.doi.org/10.2298/BG20100713DZUNUZOVIC ; http://eteze.bg.ac.rs/application/showtheses?thesesId=641 ; https://fedorabg.bg.ac.rs/fedora/get/o:6830/bdef:Content/get ; http://vbs.rs/scripts/cobiss?command=SEARCH&base=99999&select=ID=37200143.

MLA Handbook (7^th Edition):

Enis, Džunuzović. “Preparation of nanocomposites based on thermoplastic polymers and influence of titanium and iron oxides nanoparticles on their properties.” 2010. Web. 15 Jan 2021.

Vancouver:

Enis D. Preparation of nanocomposites based on thermoplastic polymers and influence of titanium and iron oxides nanoparticles on their properties. [Internet] [Doctoral dissertation]. University of Belgrade; 2010. [cited 2021 Jan 15]. Available from: http://dx.doi.org/10.2298/BG20100713DZUNUZOVIC ; http://eteze.bg.ac.rs/application/showtheses?thesesId=641 ; https://fedorabg.bg.ac.rs/fedora/get/o:6830/bdef:Content/get ; http://vbs.rs/scripts/cobiss?command=SEARCH&base=99999&select=ID=37200143.

Council of Science Editors:

Enis D. Preparation of nanocomposites based on thermoplastic polymers and influence of titanium and iron oxides nanoparticles on their properties. [Doctoral Dissertation]. University of Belgrade; 2010. Available from: http://dx.doi.org/10.2298/BG20100713DZUNUZOVIC ; http://eteze.bg.ac.rs/application/showtheses?thesesId=641 ; https://fedorabg.bg.ac.rs/fedora/get/o:6830/bdef:Content/get ; http://vbs.rs/scripts/cobiss?command=SEARCH&base=99999&select=ID=37200143

Brno University of Technology

20. Jakub, Zdeněk. Příprava vzorků pro elektrochemické studium povrchů – transport vzorku mezi UHV a elektrochemickým prostředím: UHV-EC transfer system for electrochemical surface science studies.

Degree: 2019, Brno University of Technology

URL: http://hdl.handle.net/11012/60789

► This thesis deals with the combined ultra-high vacuum (UHV) and electrochemical (EC) studies of selected iron oxide surfaces, namely Fe3O4(001) and -Fe2O3(012). The state-of- the-art… (more)

Subjects/Keywords: rastrovací tunelovací mikroskop (STM); UHV-EC; magnetit Fe3O4; hematit -Fe2O3; oxidy železa; povrchová struktura; stabilita povrchových rekonstrukcí; katalýza na jednotlivých atomech; Scanning Tunneling Microscopy (STM); UHV-EC; magnetite Fe3O4; hematite -Fe2O3; iron oxides; surface structure; surface structure stability; single atom catalysis

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Jakub, Z. (2019). Příprava vzorků pro elektrochemické studium povrchů – transport vzorku mezi UHV a elektrochemickým prostředím: UHV-EC transfer system for electrochemical surface science studies. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/60789

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Jakub, Zdeněk. “Příprava vzorků pro elektrochemické studium povrchů – transport vzorku mezi UHV a elektrochemickým prostředím: UHV-EC transfer system for electrochemical surface science studies.” 2019. Thesis, Brno University of Technology. Accessed January 15, 2021. http://hdl.handle.net/11012/60789.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Jakub, Zdeněk. “Příprava vzorků pro elektrochemické studium povrchů – transport vzorku mezi UHV a elektrochemickým prostředím: UHV-EC transfer system for electrochemical surface science studies.” 2019. Web. 15 Jan 2021.

Vancouver:

Jakub Z. Příprava vzorků pro elektrochemické studium povrchů – transport vzorku mezi UHV a elektrochemickým prostředím: UHV-EC transfer system for electrochemical surface science studies. [Internet] [Thesis]. Brno University of Technology; 2019. [cited 2021 Jan 15]. Available from: http://hdl.handle.net/11012/60789.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Jakub Z. Příprava vzorků pro elektrochemické studium povrchů – transport vzorku mezi UHV a elektrochemickým prostředím: UHV-EC transfer system for electrochemical surface science studies. [Thesis]. Brno University of Technology; 2019. Available from: http://hdl.handle.net/11012/60789

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

21. William Nova Castelblanco. Redução de NO com CO sobre catalisadores de CuO, Fe2O3 e CuO-Fe2O3 suportados em TiO2, ZrO2 e TiO2-ZrO2: Efeito do vapor de água na atividade e seletividade a N2.

Degree: 2013, Universidade Federal de São Carlos

URL: http://www.bdtd.ufscar.br/htdocs/tedeSimplificado//tde_busca/arquivo.php?codArquivo=6544

►

A combustão de derivados do petróleo gera grandes emissões de NOX, SOX e outros fortes poluentes da atmosfera. O abatimento de NOX pode ser realizado… (more)

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A combustão de derivados do petróleo gera grandes emissões de NOX, SOX e outros fortes poluentes da atmosfera. O abatimento de NOX pode ser realizado por meio da redução catalítica não seletiva com CO, onde os metais nobres suportados têm sido os mais empregados, com a desvantagem de seu elevado custo. Óxidos de metais de transição apresentam boa atividade nessa reação, no entanto, têm baixo desempenho na presença de SO2, O2 e vapor de água. Assim, este trabalho teve como objetivo preparar, caracterizar e avaliar catalisadores a base de CuO, Fe2O3 e CuO-Fe2O3 suportados em TiO2, ZrO2 ou suas misturas, na redução de NO a N2 com CO na presença ou ausência de vapor de água. Dados de DRX, adsorção de N2 e RTP-H2 mostraram que os suportes mistos e seus catalisadores, que foram preparados via síntese sol-gel in-situ, apresentaram áreas superficiais específicas entre 30 e 60 m2/g, com as espécies de Cu ou Fe altamente distribuídas, tendo essas últimas maior interação com a titânia. Refinamento de Rietveld mostrou formação preferencial de titanato de zircônia, evidenciando a estreita interação dessas espécies nos suportes mistos. Todos os catalisadores foram altamente ativos na redução de NO a N2. Em temperaturas inferiores 500 C os catalisadores de CuO foram mais ativos e seletivos à formação de N2 que o Fe2O3, com a formação de N2O sendo favorecida com o aumento de zircônia no suporte. A 600 C, a alta conversão de NO a N2 sobre CuO não foi influenciada pelo conteúdo de TiO2 no suporte. Nessa temperatura, o aumento do teor de titânia provocou nos catalisadores de Fe2O3 uma queda significativa na conversão de NO a N2. A presença de vapor de água durante a redução de NO com CO a 600 C provocou sobre CuO queda significativa da conversão de NO a N2 e de CO a CO2 sobre o suporte com maior conteúdo de titânia. Nos catalisadores de Fe2O3 puro, o vapor de água anulou completamente a atividade para a redução de NO a N2, mas manteve-se a conversão de CO a CO2. Os catalisadores de CuO e CuO-Fe2O3 sobre suporte contendo alto teor de zircônia apresentaram alto potencial para o abatimento de NOx na presença de vapor de água em temperaturas superiores a 500 C.

The combustion of petroleum fuels produces large emissions of NOX, SOX and other strong atmospheric pollutants. The abatement of NOX can be achieved by the nonselective catalytic reduction of NO with CO, for that, supported noble metals have been the most commonly used, with high cost as disadvantage. Transition metal oxides show good activity for this reaction, however, they have poor performance in the presence of SO2, O2 and water steam. Thus, this study aimed to prepare, characterize and evaluate catalysts based on CuO, Fe2O3 and CuO-Fe2O3 supported on TiO2, ZrO2 and their mixtures, in the reduction of NO to N2 with CO in the presence or absence of water steam. XRD data, N2 adsorption and H2-TPR showed that mixed oxides and their catalysts, prepared by sol-gel in-situ, presented specific surface areas between 30 to 60 m2/g, with Cu or Fe species highly distributed, having the…

Advisors/Committee Members: Ernesto Antonio Urquieta-González.

Subjects/Keywords: Óxidos mistos; CO; CuO; Fe2O3; TiO2; ZrO2; ENGENHARIA QUIMICA; NOX reduction; Water steam; Redução de NO; Catálise heterogênea; Abatimento de NO/CO; Óxido de ferro

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Castelblanco, W. N. (2013). Redução de NO com CO sobre catalisadores de CuO, Fe2O3 e CuO-Fe2O3 suportados em TiO2, ZrO2 e TiO2-ZrO2: Efeito do vapor de água na atividade e seletividade a N2. (Thesis). Universidade Federal de São Carlos. Retrieved from http://www.bdtd.ufscar.br/htdocs/tedeSimplificado//tde_busca/arquivo.php?codArquivo=6544

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Castelblanco, William Nova. “Redução de NO com CO sobre catalisadores de CuO, Fe2O3 e CuO-Fe2O3 suportados em TiO2, ZrO2 e TiO2-ZrO2: Efeito do vapor de água na atividade e seletividade a N2.” 2013. Thesis, Universidade Federal de São Carlos. Accessed January 15, 2021. http://www.bdtd.ufscar.br/htdocs/tedeSimplificado//tde_busca/arquivo.php?codArquivo=6544.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Castelblanco, William Nova. “Redução de NO com CO sobre catalisadores de CuO, Fe2O3 e CuO-Fe2O3 suportados em TiO2, ZrO2 e TiO2-ZrO2: Efeito do vapor de água na atividade e seletividade a N2.” 2013. Web. 15 Jan 2021.

Vancouver:

Castelblanco WN. Redução de NO com CO sobre catalisadores de CuO, Fe2O3 e CuO-Fe2O3 suportados em TiO2, ZrO2 e TiO2-ZrO2: Efeito do vapor de água na atividade e seletividade a N2. [Internet] [Thesis]. Universidade Federal de São Carlos; 2013. [cited 2021 Jan 15]. Available from: http://www.bdtd.ufscar.br/htdocs/tedeSimplificado//tde_busca/arquivo.php?codArquivo=6544.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Castelblanco WN. Redução de NO com CO sobre catalisadores de CuO, Fe2O3 e CuO-Fe2O3 suportados em TiO2, ZrO2 e TiO2-ZrO2: Efeito do vapor de água na atividade e seletividade a N2. [Thesis]. Universidade Federal de São Carlos; 2013. Available from: http://www.bdtd.ufscar.br/htdocs/tedeSimplificado//tde_busca/arquivo.php?codArquivo=6544

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Queensland

22. Nicol, Stuart L. Solidification of melts in the CaO-“Fe2O3”-SiO2 system.

Degree: School of Chemical Engineering, 2019, University of Queensland

URL: http://espace.library.uq.edu.au/view/UQ:740

Subjects/Keywords: Sintering; Solidification; Iron Ore; “Fe2O3”- CaO-SiO2; 0914 Resources Engineering and Extractive Metallurgy

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APA (6^th Edition):

Nicol, S. L. (2019). Solidification of melts in the CaO-“Fe2O3”-SiO2 system. (Thesis). University of Queensland. Retrieved from http://espace.library.uq.edu.au/view/UQ:740

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Nicol, Stuart L. “Solidification of melts in the CaO-“Fe2O3”-SiO2 system.” 2019. Thesis, University of Queensland. Accessed January 15, 2021. http://espace.library.uq.edu.au/view/UQ:740.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Nicol, Stuart L. “Solidification of melts in the CaO-“Fe2O3”-SiO2 system.” 2019. Web. 15 Jan 2021.

Vancouver:

Nicol SL. Solidification of melts in the CaO-“Fe2O3”-SiO2 system. [Internet] [Thesis]. University of Queensland; 2019. [cited 2021 Jan 15]. Available from: http://espace.library.uq.edu.au/view/UQ:740.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Nicol SL. Solidification of melts in the CaO-“Fe2O3”-SiO2 system. [Thesis]. University of Queensland; 2019. Available from: http://espace.library.uq.edu.au/view/UQ:740

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

23. Μπασινά, Γεωργία. Μελέτη σύνθεσης και επιφανειακής τροποποίησης μαγνητικών νανοσωματιδίων για βιοϊατρικές εφαρμογές.

Degree: 2012, University of Ioannina; Πανεπιστήμιο Ιωαννίνων

URL: http://hdl.handle.net/10442/hedi/29359

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The purpose of this thesis was the synthesis, surface modification and characterization of magnetic nanoparticles (γ-Fe2O3, Fe3O4, MnFe2O4, Fe, FeCo, FePt) which are suitable for… (more)

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The purpose of this thesis was the synthesis, surface modification and characterization of magnetic nanoparticles (γ-Fe2O3, Fe3O4, MnFe2O4, Fe, FeCo, FePt) which are suitable for biomedical applications. The nanoparticles were prepared by wet chemical routes such as thermolysis, coprecipitation and modified polyol process and their characterization was processed with a plethora of techniques such as XRD, TEM, SEM, Μössbauer spectroscopy, FT-IR, TGA, VSM and SQUID. Specifically, organophilic γ-Fe2O3 and Fe3O4 nanopartcicles with controllable size (2-20 nm) and narrow size distribution, were initially prepared by thermolysis and then transformed into hydrophilic particles, through simple processes in emulsions, in the presence of cationic or anionic surfactant molecules. Such nanoparticles consist of an organophilic and hydrophilic shell and are suitable for the encapsulation of non-water soluble drugs. Second, hydrophilic Fe3O4 nanoparticles were successfully prepared through a one step precipitation method, which they brought on their surface a doubly hydrophilic copolymer which was responsible for their ferrofluid behaviour. However, replacing the copolymer with a biocompatible, synthetic silicate material (Laponite), a composite material was produced (γ-Fe2O3@ laponite) which was suitable for biomedical applications due to its high rate increasement of temperature (SAR = 131 W/g) in magnetic hyperthermia and high relaxation coefficient (r2=64 mM-1s1) in magnetic resonance imaging (MRI). Moreover, amphiphilic γ-Fe2O3, Fe3O4 and MnFe2O4 nanoparticles were also prepared by modified polyol process. Especially in the case of MnFe2O4 nanoparticles, found that exhibit excellent contrast in MRI technique as they reveal a very high coefficient relaxation, r2 reached up to 453 mM-1s1. The synthesis of metallic Fe nanoparticles was also studied by the modified polyol process. The reaction leads to Fe nanoparticles with mean diameter 20 nm, which display a very high value of saturation magnetisation (168 emu/g) that approximates the value of the magnetization for the bulk material by 80%. Finally FeCo and FePt nanoparticles were also synthesized. The FeCo nanoparticles exhibit the highest saturation magnetization, which is 145 emu/g when the size of the particles is about 8 nm and FePt nanoparticles show very high coercivity values (up to 2.8 kOe) due to their large magnetocrystalline anisotropy which are appropriate as T1 contrast agents in MRI.

Ο σκοπός της διατριβής, ήταν η σύνθεση, επιφανειακή τροποποίηση και ο χαρακτηρισμός μαγνητικών νανοσωματιδίων (γ-Fe2O3, Fe3O4, MnFe2O4, Fe, FeCo, FePt) που είναι κατάλληλα για βιοϊατρικές εφαρμογές. Τα νανοσωματίδια παρασκευάστηκαν με μεθόδους υγρής χημείας όπως η θερμόλυση, η συγκαταβύθιση και η μέθοδος της τροποποιημένης πολυόλης ενώ ο χαρακτηρισμός τους έγινα με πληθώρα τεχνικών όπως XRD, TEM, SEM, φασματοσκοπία Μössbauer, FT-IR, TGA, VSM και SQUID. Συγκεκριμένα με τη μέθοδο της θερμόλυσης παρασκευάστηκαν οργανόφιλα νανοσωματίδια γ-Fe2O3 και Fe3O4, με ελεγχόμενο μέγεθος (2-20…

Subjects/Keywords: Χημεία υλικών; Μαγνητικά νανοσωματίδια; Μέθοδοι υγρής χημείας; Χαρακτηρισμός νανοδομημένων υλικών; Οξείδια σιδήρου (γ-Fe2O3, Fe3O4); Νανοσωματίδια με βάση τον σίδηρο (Fe, FeCo, FePt); Επιφανειακή τροποποίηση; ΄Σιδηρορευστά/Κολλοειδή; Βιοϊατρικές εφαρμογές; Materials chemistry; Magnetic nanoparticles; Wet chemical methods; Characterization of ananostructured materials; Iron oxides (γ-Fe2O3, Fe3O4); Metallic iron-based nanoparticles (Fe, FeCo, FePt); Surface modification; Ferrofluids/Colloids; Biomedical applications

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Μπασινά, . �. (2012). Μελέτη σύνθεσης και επιφανειακής τροποποίησης μαγνητικών νανοσωματιδίων για βιοϊατρικές εφαρμογές. (Thesis). University of Ioannina; Πανεπιστήμιο Ιωαννίνων. Retrieved from http://hdl.handle.net/10442/hedi/29359

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Μπασινά, Γεωργία. “Μελέτη σύνθεσης και επιφανειακής τροποποίησης μαγνητικών νανοσωματιδίων για βιοϊατρικές εφαρμογές.” 2012. Thesis, University of Ioannina; Πανεπιστήμιο Ιωαννίνων. Accessed January 15, 2021. http://hdl.handle.net/10442/hedi/29359.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Μπασινά, Γεωργία. “Μελέτη σύνθεσης και επιφανειακής τροποποίησης μαγνητικών νανοσωματιδίων για βιοϊατρικές εφαρμογές.” 2012. Web. 15 Jan 2021.

Vancouver:

Μπασινά �. Μελέτη σύνθεσης και επιφανειακής τροποποίησης μαγνητικών νανοσωματιδίων για βιοϊατρικές εφαρμογές. [Internet] [Thesis]. University of Ioannina; Πανεπιστήμιο Ιωαννίνων; 2012. [cited 2021 Jan 15]. Available from: http://hdl.handle.net/10442/hedi/29359.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Μπασινά �. Μελέτη σύνθεσης και επιφανειακής τροποποίησης μαγνητικών νανοσωματιδίων για βιοϊατρικές εφαρμογές. [Thesis]. University of Ioannina; Πανεπιστήμιο Ιωαννίνων; 2012. Available from: http://hdl.handle.net/10442/hedi/29359

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Vanderbilt University

24. Harris, Andrew Gordon. Recent Advances in Chemical Synthesis Methodology of Inorganic Materials and Theoretical Computation of Metal Nanoparticles/Carbon Interfaces.

Degree: PhD, Chemistry, 2015, Vanderbilt University

URL: http://hdl.handle.net/1803/14937

► Using density functional theory (DFT) the interface of metal nanoparticles to cup-stacked carbon nanofibers were modelled and studied for binding interactions and characterization signatures for… (more)

▼ Using density functional theory (DFT) the interface of metal nanoparticles to cup-stacked carbon nanofibers were modelled and studied for binding interactions and characterization signatures for different crystal facets of mono-metallic Pt and the PtRu alloy. The strongest metal–carbon interaction is predicted for a (111) facet attached to a zigzag edge. The anchoring of the PtRu metal is found to have pronounced effects on the surface composition of the alloy. Whereas the bare surface is rich in Pt, the interface with carbon favors the stoichiometric bulk composition. Core level binding energies of carbon, platinum and ruthenium are found to provide valuable signatures of the interface and give means to interpret future high resolution photoemission core level spectroscopy experiments. A new synthesis methodology, namely Confined-Plume Chemical Deposition (CPCD), has been developed within the Lukehart Group. Originally this technique utilized the free electron laser (FEL) at Vanderbilt University; however this laser is not widely available to other researchers. As such, considerable effort has been made to extend CPCD to table-top lasers. CPCD represents a much faster synthesis methodology, capable of depositing desired materials directly on the support for application. Successful application of CPCD to several different research interests, namely magnetic field assisted deposition of Fe₃O₄, deposition Au on onion, and formation of lanthanide doped YBO₃ powders, is shown. Dysprosium and Holmium have the two highest magnetic susceptibilities of any elements. This makes them ideal materials for detecting small changes in electrical flow and thus magnetic flux. Dysprosium was produced by ball milling metallic flakes in a planetary ball mill under nitrogen atmosphere. This technique produces flat 5 to 20 μm metallic particles, but spherical particles are desired. Tumble milling was used to round these particles into 1 to 10 μm particles. These metallic dysprosium particles are then coated with platinum through a reductive transmetallization reaction with platinum hexafluoroacetylacetonate. Advisors/Committee Members: Janet E. Macdonald (committee member), D. Greg Walker (committee member), Borisla L. Ivanov (committee member), Charles M Lukehart (committee member), Timothy P. Hanusa (Committee Chair).

Subjects/Keywords: beam shaping; magneticly controlled plasma; radiation detection; lanthanide magnetic microparticles; dysprosium; DFT; Pt; PtRu; metal on carbon interface; Au on onion; Fe2O3 chain-like aggregates; femtosecond laser; Confined-Plume Chemical Deposition

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Harris, A. G. (2015). Recent Advances in Chemical Synthesis Methodology of Inorganic Materials and Theoretical Computation of Metal Nanoparticles/Carbon Interfaces. (Doctoral Dissertation). Vanderbilt University. Retrieved from http://hdl.handle.net/1803/14937

Chicago Manual of Style (16^th Edition):

Harris, Andrew Gordon. “Recent Advances in Chemical Synthesis Methodology of Inorganic Materials and Theoretical Computation of Metal Nanoparticles/Carbon Interfaces.” 2015. Doctoral Dissertation, Vanderbilt University. Accessed January 15, 2021. http://hdl.handle.net/1803/14937.

MLA Handbook (7^th Edition):

Harris, Andrew Gordon. “Recent Advances in Chemical Synthesis Methodology of Inorganic Materials and Theoretical Computation of Metal Nanoparticles/Carbon Interfaces.” 2015. Web. 15 Jan 2021.

Vancouver:

Harris AG. Recent Advances in Chemical Synthesis Methodology of Inorganic Materials and Theoretical Computation of Metal Nanoparticles/Carbon Interfaces. [Internet] [Doctoral dissertation]. Vanderbilt University; 2015. [cited 2021 Jan 15]. Available from: http://hdl.handle.net/1803/14937.

Council of Science Editors:

Harris AG. Recent Advances in Chemical Synthesis Methodology of Inorganic Materials and Theoretical Computation of Metal Nanoparticles/Carbon Interfaces. [Doctoral Dissertation]. Vanderbilt University; 2015. Available from: http://hdl.handle.net/1803/14937

Indian Institute of Science

25. Penki, Tirupathi Rao. High Capacity Porous Electrode Materials of Li-ion Batteries.

Degree: PhD, Faculty of Science, 2017, Indian Institute of Science

URL: http://etd.iisc.ac.in/handle/2005/2907

► Lithium-ion battery is attractive for various applications because of its high energy density. The performance of Li-ion battery is influenced by several properties of the… (more)

▼ Lithium-ion battery is attractive for various applications because of its high energy density. The performance of Li-ion battery is influenced by several properties of the electrode materials such as particle size, surface area, ionic and electronic conductivity, etc. Porosity is another important property of the electrode material, which influences the performance. Pores can allow the electrolyte to creep inside the particles and also facilitate volume expansion/contraction arising from intercalation/deintercalation of Li+ ions. Additionally, the rate capability and cycle-life can be enhanced. The following porous electrode materials are investigated. Poorly crystalline porous -MnO2 is synthesized by hydrothermal route from a neutral aqueous solution of KMnO4 at 180 °C and the reaction time of 24 h. On heating, there is a decrease in BET surface area and also a change in morphology from nanopetals to clusters of nanorods. As prepared MnO2 delivers a high discharge specific capacity of 275 mAh g-1 at a specific current of 40 mA g-1 (C/5 rate). Lithium rich manganese oxide (Li2MnO3) is prepared by reverse microemulsion method employing Pluronic acid (P123) as a soft template. It has a well crystalline structure with a broadly distributed mesoporosity but low surface area. However, the sample gains surface area with narrowly distributed mesoporosity and also electrochemical activity after treating in 4 M H2SO4. A discharge capacity of about 160 mAh g-1 is obtained at a discharge current of 30 mA g-1. When the acid-treated sample is heated at 300 °C, the resulting porous sample with a large surface area and dual porosity provides a discharge capacity of 240 mAh g-1 at a discharge current density of 30 mA g-1. Solid solutions of Li2MnO3 and LiMO2 (M=Mn, Ni, Co, Fe and their composites) are more attractive positive electrode materials because of its high capacity >200 mAh g-1.The solid solutions are prepared by microemulsion and polymer template route, which results in porous products. All the solid solution samples exhibit high discharge capacities with high rate capability. Porous flower-like α-Fe2O3 nanostructures is synthesized by ethylene glycol mediated iron alkoxide as an intermediate and heated at different temperatures from 300 to 700 °C. The α-Fe2O3 samples possess porosity with high surface area and deliver discharge capacity values of 1063, 1168, 1183, 1152 and 968 mAh g-1 at a specific current of 50 mA g-1 when prepared at 300, 400, 500, 600 and 700 °C, respectively. Partially exfoliated and reduced graphene oxide (PE-RGO) is prepared by thermal exfoliation of graphite oxide (GO) under normal air atmosphere at 200-500 °C. Discharge capacity values of 771, 832, 1074 and 823 mAh g -1 are obtained with current density of 30 mA g-1 at 1st cycle for PE-RGO samples prepared at 200, 300, 400 and 500 °C, respectively. The electrochemical performance improves on increasing of exfoliation temperature, which is attributed to an increase in surface area. The high rate capability is attributed to porous nature of the… Advisors/Committee Members: Munichandraiah, N (advisor).

Subjects/Keywords: Porous Electrode Materials; Rechargable Batteries; Li-ion Batteries; Electrochemical Energy Storage; Electrochemical Power Sources; Electrode Materials; Lithium-ion Batteries; Porous MnO2; Porous Li2MnO3; Porous Li1.2Mn0.53Ni0.13Co0.13O2 Composite; Dual Porosity Li1.2Mn0.6Ni0.2O2 Composite; Porous α-Fe2O3; Graphite Oxide (GO); Reduced Graphite Oxide (RGO); Li-ion Cells; Graphene; Electrochemistry

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Penki, T. R. (2017). High Capacity Porous Electrode Materials of Li-ion Batteries. (Doctoral Dissertation). Indian Institute of Science. Retrieved from http://etd.iisc.ac.in/handle/2005/2907

Chicago Manual of Style (16^th Edition):

Penki, Tirupathi Rao. “High Capacity Porous Electrode Materials of Li-ion Batteries.” 2017. Doctoral Dissertation, Indian Institute of Science. Accessed January 15, 2021. http://etd.iisc.ac.in/handle/2005/2907.

MLA Handbook (7^th Edition):

Penki, Tirupathi Rao. “High Capacity Porous Electrode Materials of Li-ion Batteries.” 2017. Web. 15 Jan 2021.

Vancouver:

Penki TR. High Capacity Porous Electrode Materials of Li-ion Batteries. [Internet] [Doctoral dissertation]. Indian Institute of Science; 2017. [cited 2021 Jan 15]. Available from: http://etd.iisc.ac.in/handle/2005/2907.

Council of Science Editors:

Penki TR. High Capacity Porous Electrode Materials of Li-ion Batteries. [Doctoral Dissertation]. Indian Institute of Science; 2017. Available from: http://etd.iisc.ac.in/handle/2005/2907

University of Queensland

26. Crivits, Tijl. Fundamental studies on the chemical aspects of freeze linings.

Degree: School of Chemical Engineering, 2016, University of Queensland

URL: http://espace.library.uq.edu.au/view/UQ:396577

Subjects/Keywords: Freeze lining; Phase equilibria; Slag; Cu2O–Fe2O3–MgO–SiO2; Al2O3–CaO–SiO2; H2O–CaCl2; 091407 Pyrometallurgy

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Crivits, T. (2016). Fundamental studies on the chemical aspects of freeze linings. (Thesis). University of Queensland. Retrieved from http://espace.library.uq.edu.au/view/UQ:396577

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Crivits, Tijl. “Fundamental studies on the chemical aspects of freeze linings.” 2016. Thesis, University of Queensland. Accessed January 15, 2021. http://espace.library.uq.edu.au/view/UQ:396577.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Crivits, Tijl. “Fundamental studies on the chemical aspects of freeze linings.” 2016. Web. 15 Jan 2021.

Vancouver:

Crivits T. Fundamental studies on the chemical aspects of freeze linings. [Internet] [Thesis]. University of Queensland; 2016. [cited 2021 Jan 15]. Available from: http://espace.library.uq.edu.au/view/UQ:396577.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Crivits T. Fundamental studies on the chemical aspects of freeze linings. [Thesis]. University of Queensland; 2016. Available from: http://espace.library.uq.edu.au/view/UQ:396577

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

27. Kumar, Prateek. Heat Capacity and Oxidation Kinetic Studies of Fe-Ti Composite Metal Oxide (ITCMO) using Simultaneous Differential Scanning Calorimetry and Thermogravimetric Analysis.

Degree: MS, Chemical Engineering, 2017, The Ohio State University

URL: http://rave.ohiolink.edu/etdc/view?acc_num=osu1502723527531035

► The present work aims to understand the oxidation kinetics of Iron-Titanium composite (ITCMO) metal oxides used in Coal Direct Chemical Looping (CDCL), an advanced combustion… (more)

▼ The present work aims to understand the oxidation kinetics of Iron-Titanium composite (ITCMO) metal oxides used in Coal Direct Chemical Looping (CDCL), an advanced combustion process with near zero carbon dioxide emissions. Chemical Looping is an emerging third-generation advanced carbon capture technology with the most cost reduction benefits among all existing CO2 capture technologies. The Ohio State University has pioneered the development of Coal Direct Chemical Looping (CDCL) technology for efficient and cost-effective carbon capture from power plants.The CDCL process uses a proprietary Fe-Ti composite metal oxide developed by the OSU Clean Energy Laboratory that transfers oxygen from the air to fully oxidize coal through a redox reaction mechanism. Pulverized coal is injected into the moving bed reducer where the oxygen carrier is reduced while maximizing the oxidation of coal. The reduced oxygen carrier is combusted in an air combustor in a highly exothermic reaction. The design of the reducer has been studied in greater detail to develop this technology to establish the gas-solid multi phase flow contact pattern and kinetics. A pre-FEED study is in progress to demonstrate this technology on a 10MWe scale. For a successful demonstration of this technology and further scale up on to a 550MWe unit; the oxidation kinetics need to be thoroughly established. The kinetics of the Combustor is necessary for the development of a heat exchanger network and a CFD model. The HEN network is required to remove the exothermic heat using in bed heat exchangers in the fluidized bed combustor. System parameters for dynamic simulation models of the process also need to be established. This study focused on the estimation of the heat capacity of Fe-Ti composite metal oxide particles (ITCMO) used in the CDCL technology. Calculation of activation energy, rate constant and heat of reaction of the ITCMO particles reduced using H2 and CO is also carried out. A preliminary kinetic model is created for the development of an ASPEN Plus simulation model. A simultaneous Differential Scanning Calorimetry and Thermogravimetric Analyzer was used to measure the heat and weight changes in the ITCMO samples. The heat capacity experiments were performed at temperatures from 200C -1200C under inert N2 atmosphere. The heat of reaction studies was carried out at temperatures ranging from 750C - 1100C which are representative of the temperatures used in the combustor. The model prepared from the isothermal studies show that the reaction rate is governed by a complex diffusion controlled mechanism. The initial reaction is governed by a logarithmic rate law indicating that the for the first 90 seconds, the reaction proceeds by a followed by a slow diffusion process. At higher temperature, ionic diffusion affects the reaction rate. The reaction happens on the grain boundaries. At temperatures above 800C, the formation of pseudobrookite is favored. Based on the observations from the isothermal studies, temperature programmed oxidation and corresponding… Advisors/Committee Members: Fan, Liang-Shih (Advisor), Palmer, Andre (Committee Chair).

Subjects/Keywords: Chemical Engineering; ITCMO, Chemical Looping, Heat Capacity, Oxidation, Iron, Titania, Fe, TiO2, Fe2O3, ilmenite, pseudobrookite

…Coal + Fe2O3 → Fe/FeO +H2O +CO2 Combustor: Air +Fe/FeO → Fe2O3 + Spent Air(Heat)… …oxides compounds like Fe3O4 and Fe2O3 are not usually reported. From a study of phase diagram… …and thermodynamics, Fe2O3, FeTiO3, Fe2TiO5 should not be expected to release gas phase… …performed on analytical grade TiO2 Fe2O3, FeTiO3, and Fe2TiO5 to ascertain the loss in weight… …of the particles. A new sintered ITCMO particle showed small peaks of Fe2O3 as illustrated…

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APA (6^th Edition):

Kumar, P. (2017). Heat Capacity and Oxidation Kinetic Studies of Fe-Ti Composite Metal Oxide (ITCMO) using Simultaneous Differential Scanning Calorimetry and Thermogravimetric Analysis. (Masters Thesis). The Ohio State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=osu1502723527531035

Chicago Manual of Style (16^th Edition):

Kumar, Prateek. “Heat Capacity and Oxidation Kinetic Studies of Fe-Ti Composite Metal Oxide (ITCMO) using Simultaneous Differential Scanning Calorimetry and Thermogravimetric Analysis.” 2017. Masters Thesis, The Ohio State University. Accessed January 15, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=osu1502723527531035.

MLA Handbook (7^th Edition):

Kumar, Prateek. “Heat Capacity and Oxidation Kinetic Studies of Fe-Ti Composite Metal Oxide (ITCMO) using Simultaneous Differential Scanning Calorimetry and Thermogravimetric Analysis.” 2017. Web. 15 Jan 2021.

Vancouver:

Kumar P. Heat Capacity and Oxidation Kinetic Studies of Fe-Ti Composite Metal Oxide (ITCMO) using Simultaneous Differential Scanning Calorimetry and Thermogravimetric Analysis. [Internet] [Masters thesis]. The Ohio State University; 2017. [cited 2021 Jan 15]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1502723527531035.

Council of Science Editors:

Kumar P. Heat Capacity and Oxidation Kinetic Studies of Fe-Ti Composite Metal Oxide (ITCMO) using Simultaneous Differential Scanning Calorimetry and Thermogravimetric Analysis. [Masters Thesis]. The Ohio State University; 2017. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1502723527531035

28. Najjar, Samar. Couplage AFM/Raman et spectroscopie Raman exaltée par effet de pointe de nanostructures : Study of nanostructures with AFM/Raman coupling device and Tip Enhanced Raman Spectroscopy (TERS).

Degree: Docteur es, Chimie-physique, 2013, Université de Bordeaux I

URL: http://www.theses.fr/2013BOR14848

►

Pour mieux comprendre leurs propriétés, diverses nanostructures individuelles ont été étudiées à l’aide d’une technique couplant microscopie à force atomique et spectroscopie Raman confocale. Sous… (more)

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Pour mieux comprendre leurs propriétés, diverses nanostructures individuelles ont été étudiées à l’aide d’une technique couplant microscopie à force atomique et spectroscopie Raman confocale. Sous excitation lumineuse polarisée, la composition chimique, la structure et la présence de défauts a pu être précisée dans des nanobâtonnets d’oxydes métalliques (ZnO et α-Fe2O3). Sous irradiation laser résonnante, les spectres de nanotubes de carbone monoparoi enrobés de polymères ont révélé notamment l’absence de transfert de charge polymère-nanotube et un effet de désolvatation. Finalement, des feuillets de graphène oxydé et des ADNs double-brin peignés ont pu être préparés et caractérisés par spectroscopie Raman exaltée par effet de pointe en atteignant une résolution spatiale latérale voisine du rayon de courbure de l’apex de la pointe utilisée (12 nm), bien plus faible que la limite de diffraction, ce qui ouvre la voie à de nouveaux travaux spectroscopiques à l’échelle nanométrique.

To better understand their properties, various nanostructures have been studied using a technique combining atomic force microscopy and confocal Raman spectroscopy. Under polarized light excitation, the chemical composition, the structure and the presence of defects has been described in metal oxides nanorods (ZnO et α-Fe2O3). Under resonant laser excitation, Raman spectra of polymer-wrapped single-walled carbon nanotubes have revealed the absence of polymer-nanotube charge transfer and an effect due to desolvation. Finally, graphene oxide sheets and combed double-stranded DNAs have been prepared and characterized using tip-enhanced Raman spectroscopy with a lateral spatial resolution down to the curvature radius of the apex of the used tip (12 nm), well below the diffraction limit, which opens new opportunities for spectroscopic works at the nanometer scale.

Advisors/Committee Members: Rodriguez, Vincent (thesis director), Bonhommeau, Sébastien (thesis director).

Subjects/Keywords: Spectroscopie Raman exaltée de pointe; Diffusion; Fe2O3 ZnO hématite nanotubes de carbone swnt graphène oxydé adn; Tip Enhanced Raman spectroscopie; Scattering; Fe2O3 ZnO hematite carbon nanotubes swnt graphene oxide dna

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APA (6^th Edition):

Najjar, S. (2013). Couplage AFM/Raman et spectroscopie Raman exaltée par effet de pointe de nanostructures : Study of nanostructures with AFM/Raman coupling device and Tip Enhanced Raman Spectroscopy (TERS). (Doctoral Dissertation). Université de Bordeaux I. Retrieved from http://www.theses.fr/2013BOR14848

Chicago Manual of Style (16^th Edition):

Najjar, Samar. “Couplage AFM/Raman et spectroscopie Raman exaltée par effet de pointe de nanostructures : Study of nanostructures with AFM/Raman coupling device and Tip Enhanced Raman Spectroscopy (TERS).” 2013. Doctoral Dissertation, Université de Bordeaux I. Accessed January 15, 2021. http://www.theses.fr/2013BOR14848.

MLA Handbook (7^th Edition):

Najjar, Samar. “Couplage AFM/Raman et spectroscopie Raman exaltée par effet de pointe de nanostructures : Study of nanostructures with AFM/Raman coupling device and Tip Enhanced Raman Spectroscopy (TERS).” 2013. Web. 15 Jan 2021.

Vancouver:

Najjar S. Couplage AFM/Raman et spectroscopie Raman exaltée par effet de pointe de nanostructures : Study of nanostructures with AFM/Raman coupling device and Tip Enhanced Raman Spectroscopy (TERS). [Internet] [Doctoral dissertation]. Université de Bordeaux I; 2013. [cited 2021 Jan 15]. Available from: http://www.theses.fr/2013BOR14848.

Council of Science Editors:

Najjar S. Couplage AFM/Raman et spectroscopie Raman exaltée par effet de pointe de nanostructures : Study of nanostructures with AFM/Raman coupling device and Tip Enhanced Raman Spectroscopy (TERS). [Doctoral Dissertation]. Université de Bordeaux I; 2013. Available from: http://www.theses.fr/2013BOR14848

University of Notre Dame

29. Anand Kumar. Combustion Synthesis of Novel Catalysts for Hydrogen Production from Light Alcohols</h1>.

Degree: Chemical Engineering, 2011, University of Notre Dame

URL: https://curate.nd.edu/show/pk02c823v3s

► Combustion synthesis (CS) has been explored as a novel tool for catalyst synthesis. CS is a simple, fast and economic process for materials synthesis… (more)

▼ Combustion synthesis (CS) has been explored as a novel tool for catalyst synthesis. CS is a simple, fast and economic process for materials synthesis which possesses many advantages over other traditional techniques for catalyst’s synthesis such as co-precipitation. Some modifications were introduced to the conventional CS technique in order to prepare fine nano-particles with high surface are to suite the catalytic applications. Time-temperature profile, adiabatic combustion temperature and product surface area were measured with varying the fuel content in the reactive combustion mixture, more specifically the so called Solution Combustion Synthesis (SCS) mixture. A correlation was established between surface area, adiabatic combustion temperature and the amount of fuel in the reactive mixture. Based on thermodynamic calculations the fuel content was adjusted to produce metal oxides, pure metals and alloys. A mechanism for product synthesis was developed on the basis of TGA/DTA results, XRD analysis of the products during CS and thermodynamic calculations. These findings were used to synthesize partially reduced catalyst with high surface area for hydrogen production from alcohols. The reactive mixture of the SCS was impregnated on a thin cellulose paper in order to enhance the heat transfer effects after combustion which would in fine particles with high surface area. This technique is known as Impregnated Layer Combustion Synthesis (ILCS). Temperature distribution across the combustion front was measured using FLIR systems IR camera, and SONY camcorder was used to record the visual changes leading to product development. The evolution of catalyst synthesis and the mechanism of self propagation were explained on the basis of these images, TGA/DTA, XRD results and with some help from other literature results. A model for ILCS process was developed in order to study the effect of different combustion parameters on the physical properties of the catalysts synthesized. Using the abovementioned techniques, Cu, Zn, Zr based catalysts were synthesized to study hydrogen production from partial oxidation of methanol. Addition of small amount of Pd, and impregnation of the Cu/Zn/Zr catalyst on ZrO2 support were also studied. Presence of Pd helps in starting the methanol combustion reaction at an earlier temperature whereas ZrO2 provides structural stability as well as high surface area to increase the active sites participating in the reaction. Ni, Fe and Cu based multicomponant catalysts were synthesized for hydrogen abstraction from ethanol reforming reactions. The molar ratios of these elements were optimized to get high ethanol conversion and hydrogen selectivity for ethanol partial oxidation using a high throughput ten-channel reactor. The most active and hydrogen selective catalyst was further studied along with single phase Ni, Fe and Cu catalysts, using a single flow recycle reactor for ethanol decomposition and partial oxidation reactions where the effluent products were analyzed using gas chromatographs. These… Advisors/Committee Members: Eduardo Wolf, Committee Member, Davide Hill, Committee Member, Joan Brennecke, Committee Member, David Leighton, Committee Chair, Alexander Mukasyan, Committee Member.

Subjects/Keywords: Combustion synthesis; Methanol partial oxidation; Impregnated layer combustion synthesis; CuO/ZnO/ZrO2 catalysts; Ethanol partial oxidation; NiO/Fe2O3/CuO catalysts; Ethanol decomposition; Hydrogen production

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Kumar, A. (2011). Combustion Synthesis of Novel Catalysts for Hydrogen Production from Light Alcohols</h1>. (Thesis). University of Notre Dame. Retrieved from https://curate.nd.edu/show/pk02c823v3s

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Kumar, Anand. “Combustion Synthesis of Novel Catalysts for Hydrogen Production from Light Alcohols</h1>.” 2011. Thesis, University of Notre Dame. Accessed January 15, 2021. https://curate.nd.edu/show/pk02c823v3s.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Kumar, Anand. “Combustion Synthesis of Novel Catalysts for Hydrogen Production from Light Alcohols</h1>.” 2011. Web. 15 Jan 2021.

Vancouver:

Kumar A. Combustion Synthesis of Novel Catalysts for Hydrogen Production from Light Alcohols</h1>. [Internet] [Thesis]. University of Notre Dame; 2011. [cited 2021 Jan 15]. Available from: https://curate.nd.edu/show/pk02c823v3s.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Kumar A. Combustion Synthesis of Novel Catalysts for Hydrogen Production from Light Alcohols</h1>. [Thesis]. University of Notre Dame; 2011. Available from: https://curate.nd.edu/show/pk02c823v3s

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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