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University of Arizona
1.
Doan, Donald Jay, 1910-.
The determination of magnetite in metallurgical products by an electromagnetic method
.
Degree: 1932, University of Arizona
URL: http://hdl.handle.net/10150/553124
Subjects/Keywords: Magnetite.
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APA (6th Edition):
Doan, Donald Jay, 1. (1932). The determination of magnetite in metallurgical products by an electromagnetic method
. (Masters Thesis). University of Arizona. Retrieved from http://hdl.handle.net/10150/553124
Chicago Manual of Style (16th Edition):
Doan, Donald Jay, 1910-. “The determination of magnetite in metallurgical products by an electromagnetic method
.” 1932. Masters Thesis, University of Arizona. Accessed January 23, 2021.
http://hdl.handle.net/10150/553124.
MLA Handbook (7th Edition):
Doan, Donald Jay, 1910-. “The determination of magnetite in metallurgical products by an electromagnetic method
.” 1932. Web. 23 Jan 2021.
Vancouver:
Doan, Donald Jay 1. The determination of magnetite in metallurgical products by an electromagnetic method
. [Internet] [Masters thesis]. University of Arizona; 1932. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/10150/553124.
Council of Science Editors:
Doan, Donald Jay 1. The determination of magnetite in metallurgical products by an electromagnetic method
. [Masters Thesis]. University of Arizona; 1932. Available from: http://hdl.handle.net/10150/553124

University of KwaZulu-Natal
2.
Maharaj, Shaheel.
Hydrocracking of short residue over unsupported and supported magnetite nanocatalysts.
Degree: 2017, University of KwaZulu-Natal
URL: https://researchspace.ukzn.ac.za/handle/10413/16887
► With the rapid depletion of crude oil and current cracking methods of heavy petroleum residue all resulting in the production of undesirable coke formation, a…
(more)
▼ With the rapid depletion of crude oil and current cracking methods of heavy petroleum residue all resulting in the production of undesirable coke formation, a better solution must be found. This project investigated the use of an unsupported molybdenum-doped
magnetite nano-catalyst, as well as a
magnetite nanocatalyst on a mesoporous silica support, to determine if the use of these catalysts can be successful in cracking petroleum residue. Short residue from the vacuum distillation column supplied by SAPREF, was used throughout the experimental work.
A lot of effort went into the preparation of the feedstock due to the high viscosity of short residue. The solvent used during experimental work was toluene, which was used to dilute the short residue. A temperature range between 350˚C and 400˚C was used in order to determine temperature effects on product distribution from the cracking reaction. The feedstock to catalyst ratio was also varied, using the unsupported catalyst, in order to determine the effects of the amount of catalyst on the reaction. Kerosene and gas oil are the desired products due to their higher heating value and use as liquid fuels compared to the heavier residue. There is a strong interaction between temperature and catalyst to feedstock ratio. The high temperature-high catalyst combination gave improved gas oil yields over the low temperature-high catalyst combination. Results carried out at 400˚C with a high catalyst amount showed the most favourable results with a yield of 49.3% and 6% of gas oil and kerosene respectively. Aquaprocessing (catalytic splitting of water that occurs on the surface complexes of the iron-based catalyst, at a relatively low pressure) was simulated at the experimental conditions using kinetics from literature for a nickel-based catalyst. The simulated composition profiles proved that the unsupported
magnetite nanocatalyst was much more efficient in upgrading residue than the nickel based catalyst, due to the presence of greater amounts of lighter components. Analysis of the catalyst after the cracking reaction shows that no major phase changes had taken place and that the catalyst could be regenerated to be used again.
The supported
magnetite nanocatlyst was compared to conventional nickel-molybdenum and cobalt-molybdenum catalyst, in a fixed bed reactor set up. The supported catalyst proved to be the most consistent, and was able to shift the residue into the lighter fractions more effectively than the conventional catalysts. The supported catalyst was the most effective in cracking the vacuum residue, mostly into vacuum gas oil. The yields using the catalyst compared quite favourably with the unsupported catalyst, with the unsupported catalyst yielding more lighter components. The most favourable results implementing a supported catalyst were also at 400˚C, due to the extensive decrease in vacuum residue and a corresponding increase in lighter components.
Ultimately this investigation proved that hydrocracking can take place with the use of a supported and…
Advisors/Committee Members: Lokhat, David. (advisor).
Subjects/Keywords: Hydrocracking.; Magnetite.; Nanocatalysts.
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APA ·
Chicago ·
MLA ·
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APA (6th Edition):
Maharaj, S. (2017). Hydrocracking of short residue over unsupported and supported magnetite nanocatalysts. (Thesis). University of KwaZulu-Natal. Retrieved from https://researchspace.ukzn.ac.za/handle/10413/16887
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Maharaj, Shaheel. “Hydrocracking of short residue over unsupported and supported magnetite nanocatalysts.” 2017. Thesis, University of KwaZulu-Natal. Accessed January 23, 2021.
https://researchspace.ukzn.ac.za/handle/10413/16887.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Maharaj, Shaheel. “Hydrocracking of short residue over unsupported and supported magnetite nanocatalysts.” 2017. Web. 23 Jan 2021.
Vancouver:
Maharaj S. Hydrocracking of short residue over unsupported and supported magnetite nanocatalysts. [Internet] [Thesis]. University of KwaZulu-Natal; 2017. [cited 2021 Jan 23].
Available from: https://researchspace.ukzn.ac.za/handle/10413/16887.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Maharaj S. Hydrocracking of short residue over unsupported and supported magnetite nanocatalysts. [Thesis]. University of KwaZulu-Natal; 2017. Available from: https://researchspace.ukzn.ac.za/handle/10413/16887
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Rhodes University
3.
Modisha, Phillimon Mokanne.
Fabrication, characterization and application of phthalocyanine-magnetite hybrid nanofibers.
Degree: Faculty of Science, Chemistry, 2014, Rhodes University
URL: http://hdl.handle.net/10962/d1013223
► Magnetic nanoparticles comprising magnetite (Fe3O4) were functionalized with 3-aminopropyl-triethoxysilane forming amino functionalized magnetite nanoparticles (AMNPs). The amino group allows for conjugation with zinc octacarboxyphthalocyanine (ZnOCPc)…
(more)
▼ Magnetic nanoparticles comprising magnetite (Fe3O4) were functionalized with 3-aminopropyl-triethoxysilane forming amino functionalized magnetite nanoparticles (AMNPs). The amino group allows for conjugation with zinc octacarboxyphthalocyanine (ZnOCPc) or zinc tetracarboxyphthalocyanine (ZnTCPc) via the carboxyl group to form an amide bond. A reduced aggregation of ZnTCPc is observed after conjugation with AMNPs. The thermal stability, conjugation, morphology and the sizes of the nanoparticles and their conjugates were confirmed using thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM) and Powder X-ray diffractometry (PXRD), respectively. The covalent linkage of AMNPs to ZnOCPc or ZnTCPc resulted in improvement in the photophysical behavior of the phthalocyanines. Improvement in the triplet quantum yield (ΦT), singlet oxygen quantum yield (ΦΔ), triplet lifetime (τT) and singlet oxygen lifetime (τΔ) of the ZnOCPc or ZnTCPc were observed, hence improving the photosensitizers efficiency. The conjugates comprising of zinc octacarboxyphthalocyanine (ZnOCPc) and AMNPs were electrospun into fibers using polyamide-6 (PA-6). This was used for the photodegradation of Orange-G and compared with ZnOCPc-AMNPs in suspension. For ZnOCPc-AMNPs in suspension, it is noteworthy that the catalyst can be easily recovered using an external magnetic field. The singlet oxygen generation increases as we increase the fiber diameter by increasing the ZnOCPc concentration. The singlet oxygen quantum yield is higher for PA-6/ZnOCPc-AMNPs nanofibers when compared to PA-6/ZnOCPc. The rate of degradation of Orange-G increased with an increase in the singlet oxygen quantum yield. Moreover, the kinetic analysis showed that the photodecomposition of Orange-G is a first-order reaction according to the Langmuir-Hinshelwood model.
Subjects/Keywords: Nanofibers; Nanoparticles; Magnetite
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APA ·
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CSE |
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APA (6th Edition):
Modisha, P. M. (2014). Fabrication, characterization and application of phthalocyanine-magnetite hybrid nanofibers. (Thesis). Rhodes University. Retrieved from http://hdl.handle.net/10962/d1013223
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Modisha, Phillimon Mokanne. “Fabrication, characterization and application of phthalocyanine-magnetite hybrid nanofibers.” 2014. Thesis, Rhodes University. Accessed January 23, 2021.
http://hdl.handle.net/10962/d1013223.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Modisha, Phillimon Mokanne. “Fabrication, characterization and application of phthalocyanine-magnetite hybrid nanofibers.” 2014. Web. 23 Jan 2021.
Vancouver:
Modisha PM. Fabrication, characterization and application of phthalocyanine-magnetite hybrid nanofibers. [Internet] [Thesis]. Rhodes University; 2014. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/10962/d1013223.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Modisha PM. Fabrication, characterization and application of phthalocyanine-magnetite hybrid nanofibers. [Thesis]. Rhodes University; 2014. Available from: http://hdl.handle.net/10962/d1013223
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of North Texas
4.
Phadnis, Ameya.
Corrosion Protection of Low Carbon Steel By Cation Substituted Magnetite.
Degree: 2013, University of North Texas
URL: https://digital.library.unt.edu/ark:/67531/metadc271878/
► Surfaces of low carbon steel sheet were modified by exposure to highly caustic aqueous solutions containing either chromium or aluminum cations. Corrosion resistances of such…
(more)
▼ Surfaces of low carbon steel sheet were modified by exposure to highly caustic aqueous solutions containing either chromium or aluminum cations. Corrosion resistances of such surfaces were compared with that of steel surfaces exposed to plain caustic aqueous solution. In all cases a highly uniform, black coating having a spinel structure similar to
magnetite (Fe3O4) was obtained. The coated steel surfaces were characterized using X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and Fourier transform infrared spectrophotometry (FTIR). Polarization resistances (Rp) of modified steel surfaces were measured and compared with that of bare steel surfaces. Results indicate that chromium (Fe2+ Fe3+x Cr3+1-x) or aluminum (Fe2+ Fe3+x Al3+1-x) substituted spinel phases formed on steel surfaces showed higher Rp values compared to only
magnetite (Fe2+ 2Fe3+O4) phase formed in the absence of either chromium or aluminum cations. Average Rp values for steel surfaces with chromium containing spinel phase were much higher (21.8 k?) as compared to 1.7 k? for bare steel surfaces. Steel surfaces with aluminum containing spinel phase and steels with plain
magnetite coated samples showed average Rp values of 3.3 k? and 2.5 k? respectively. XPS and EDS analysis confirmed presence of cations of chromium and aluminum in Fe3O4 in cation substituted samples. FTIR results showed all coating phases were of spinel form with major absorption bands centered at either 570 cm-1 or 600 cm-1 assigned to Fe3O4 and ?-Fe2O3 respectively.
Advisors/Committee Members: Nasrazadani, Seifollah, Boubekri, Nourredine, Foster, Phillip R..
Subjects/Keywords: Cation; substituted; magnetite
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University of Alberta
5.
Davies, Joshua.
Re-Os geochronology of oxide minerals.
Degree: MS, Department of Earth and Atmospheric
Sciences, 2010, University of Alberta
URL: https://era.library.ualberta.ca/files/tq57ns675
► 187Re-187Os analysis of magnetite and other oxide minerals from various well dated geological settings (kimberlites, lamprophyres, Manicouagan impact melt rock, Great Bear magmatic zone iron…
(more)
▼ 187Re-187Os analysis of magnetite and other oxide
minerals from various well dated geological settings (kimberlites,
lamprophyres, Manicouagan impact melt rock, Great Bear magmatic
zone iron ore deposits and Laramie Anorthosite complex) worldwide
have been used to investigate the potential for precise
geochronology. 187Re-187Os isotopes in groundmass oxide minerals
from kimberlites and lamprophyres are not suitable for emplacement
geochronology due to low Re contents and large quantities of
un-radiogenic Os. TRD and TMA ages can be calculated however, and
correlate well with previously published depletion ages and large
magmatic events in the overlying crust, indicating the
effectiveness of this technique. Geochronology using magnetite from
the remaining settings is im-precise due to very low Re and Os
contents but the ages produced are in the correct area. Young ages
produced from the Laramie anorthosite complex indicate that
magnetite may have a low closure temperature to Os diffusion
(~200-300ºC).
Subjects/Keywords: Kimberlite; Geochronology; Re-Os; Magnetite
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APA ·
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MLA ·
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APA (6th Edition):
Davies, J. (2010). Re-Os geochronology of oxide minerals. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/tq57ns675
Chicago Manual of Style (16th Edition):
Davies, Joshua. “Re-Os geochronology of oxide minerals.” 2010. Masters Thesis, University of Alberta. Accessed January 23, 2021.
https://era.library.ualberta.ca/files/tq57ns675.
MLA Handbook (7th Edition):
Davies, Joshua. “Re-Os geochronology of oxide minerals.” 2010. Web. 23 Jan 2021.
Vancouver:
Davies J. Re-Os geochronology of oxide minerals. [Internet] [Masters thesis]. University of Alberta; 2010. [cited 2021 Jan 23].
Available from: https://era.library.ualberta.ca/files/tq57ns675.
Council of Science Editors:
Davies J. Re-Os geochronology of oxide minerals. [Masters Thesis]. University of Alberta; 2010. Available from: https://era.library.ualberta.ca/files/tq57ns675

Virginia Tech
6.
Zhang, Rui.
Ionic Copolymer-Magnetite Complexes for Magnetic Resonance Imaging and Drug Delivery.
Degree: MS, Chemistry, 2015, Virginia Tech
URL: http://hdl.handle.net/10919/73648
► This thesis is focused on the design, synthesis and characterization of magnetite-ionic copolymer complexes as nanocarriers for drug delivery and magnetic resonance imaging. The polymers…
(more)
▼ This thesis is focused on the design, synthesis and characterization of
magnetite-ionic copolymer complexes as nanocarriers for drug delivery and magnetic resonance imaging. The polymers included phosphonate and carboxylate-containing graft and block copolymers. Oleic-acid coated
magnetite nanoparticles (8-nm and 16-nm diameters) were investigated. Cisplatin and carboplatin were used as sample drugs. The potentials of the
magnetite-ionomer complexes as dual drug delivery carriers and magnetic resonance imaging agents were evaluated.
An acrylate-functional poly(ethylene oxide) macromonomer and hexyl (and propyl) ammonium bisphosphonate methacrylate monomers were synthesized. Conventional free radical copolymerizations were conducted to synthesize the graft copolymers. The acrylate-functional poly(ethylene oxide) macromonomer was also used to form graft copolymers with tert-butyl acrylate. Block ionomers containing poly(tert-butyl acrylate) were synthesized via atom transfer radical polymerization, then the tert-butyl groups were removed to afford anions. All the monomers and polymers were characterized by 1H NMR to confirm their structures and assess their compositions. Phosphonate-containing polymers were also characterized by 31P NMR.
Magnetite nanoparticles (8-nm diameter) were synthesized by reducing Fe(acac)3 with benzyl alcohol. The 16-nm diameter
magnetite was synthesized by thermal decomposition of an iron oleate precursor in trioctylamine as a high-boiling solvent. The iron-oleate precursor was synthesized with iron (III) chloride hexahydrate and sodium oleate with mixed solvents. TEM images of the
magnetite were obtained.
Magnetite-ionomer complexes were synthesized by binding a portion of the anions (carboxylate or phosphonate) on the copolymers onto the surfaces the
magnetite. The remainder of the anions was used to bind with cisplatin and carboplatin via chelation. Physicochemical properties of the complexes were measured by dynamic light scattering. All the complexes with different polymers and
magnetite nanoparticles displayed relatively uniform sizes and good size distributions. The
magnetite-ionomer complexes displayed good colloidal stabilities in simulated physiological conditions for at least 24 hours. Those graft and block copolymer-
magnetite complexes may be good candidates as drug carriers for delivery applications.
After cisplatin and carboplatin loading, the sizes of the complexes increased slightly and the zeta potential decreased slightly, which indicated that the loadings were successful. Minimal loss of iron was found, signaling that the binding strengths between the
magnetite and the anions of the graft copolymers were strong. 8.7 wt% of platinum was found in the cisplatin loaded complexes and 6.9% in the carboplatin loaded complexes. The results indicated that the
magnetite-graft ionomer complexes were capable of loading drugs. Drug release studies were performed at pH 4.6 and 7.4 to mimick endosomal conditions and the physiological environment. Sustained release…
Advisors/Committee Members: Riffle, Judy S. (committeechair), Davis, Richey M. (committee member), Turner, S. Richard (committee member).
Subjects/Keywords: ionomer; magnetite; bisphosphonate; contrast enhancement
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Zhang, R. (2015). Ionic Copolymer-Magnetite Complexes for Magnetic Resonance Imaging and Drug Delivery. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/73648
Chicago Manual of Style (16th Edition):
Zhang, Rui. “Ionic Copolymer-Magnetite Complexes for Magnetic Resonance Imaging and Drug Delivery.” 2015. Masters Thesis, Virginia Tech. Accessed January 23, 2021.
http://hdl.handle.net/10919/73648.
MLA Handbook (7th Edition):
Zhang, Rui. “Ionic Copolymer-Magnetite Complexes for Magnetic Resonance Imaging and Drug Delivery.” 2015. Web. 23 Jan 2021.
Vancouver:
Zhang R. Ionic Copolymer-Magnetite Complexes for Magnetic Resonance Imaging and Drug Delivery. [Internet] [Masters thesis]. Virginia Tech; 2015. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/10919/73648.
Council of Science Editors:
Zhang R. Ionic Copolymer-Magnetite Complexes for Magnetic Resonance Imaging and Drug Delivery. [Masters Thesis]. Virginia Tech; 2015. Available from: http://hdl.handle.net/10919/73648

University of Illinois – Urbana-Champaign
7.
Grimm, Theodore.
Isotopic study of uranium: determining the isotopic fractionation of uranium during abiotic reduction with iron(II).
Degree: MS, 0336, 2015, University of Illinois – Urbana-Champaign
URL: http://hdl.handle.net/2142/73101
► Uranium is a contaminant of interest due to its toxicity and mobility in groundwater. It is a redox active element in which the oxidation state…
(more)
▼ Uranium is a contaminant of interest due to its toxicity and mobility in groundwater. It is a redox active element in which the oxidation state can change by the addition or removal of electrons. In one method of groundwater remediation, mobile, hexavalent uranium (U(VI)) can be reduced to immobile, tetravalent uranium (U(IV)) by microbial or abiotic chemical reactions. Unfortunately, due to uranium’s complex geochemistry, measuring concentrations does not reliably give an accurate indicator of the efficiency of removal. However, uranium isotope ratios can provide a direct way to track the extent of reduction.
At the Old Rifle site (Colorado, USA), reduction of U(VI) to U(IV) was induced via injections of acetate to stimulate microbial activity. A decrease of ~1‰ in the 238U/235U ratio of the dissolved U(VI) was observed and correlated closely to the decrease in concentration (Bopp et al., 2010). However, the primary mechanism of chemical reduction, microbial or abiotic, is still not well understood. Microbial laboratory experiments observed a shift of 1-2‰ in 238U/235U during reduction experiments with multiple bacterial strains (Basu et al., 2014). Little work has been done to determine the isotopic fractionation induced by abiotic reduction.
This study focuses on determining the isotopic fractionation of uranium during reduction with Fe(II). Time series experiments with aqueous Fe(II) and
magnetite (Fe3O4) were conducted with samples analyzed by a MC-ICP-MS. We find aqueous Fe(II) has a limited ability to reduce U(VI) and no isotopic data is reported. Stoichiometric
magnetite (χ=0.49) reduces U(VI) to U(VI) completely and rapidly as confirmed by XANES analysis, but induces no shift in 238U/235U. This finding matches results observed in three other studies (Rademacher et al, 2006; Stirling et al., 2007; Stylo et al., 2014) where abiotic reduction does not induce isotopic fractionation.
Advisors/Committee Members: Johnson, Thomas M. (advisor).
Subjects/Keywords: Uranium; Isotope; Magnetite; Reduction
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APA ·
Chicago ·
MLA ·
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CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Grimm, T. (2015). Isotopic study of uranium: determining the isotopic fractionation of uranium during abiotic reduction with iron(II). (Thesis). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/73101
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Grimm, Theodore. “Isotopic study of uranium: determining the isotopic fractionation of uranium during abiotic reduction with iron(II).” 2015. Thesis, University of Illinois – Urbana-Champaign. Accessed January 23, 2021.
http://hdl.handle.net/2142/73101.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Grimm, Theodore. “Isotopic study of uranium: determining the isotopic fractionation of uranium during abiotic reduction with iron(II).” 2015. Web. 23 Jan 2021.
Vancouver:
Grimm T. Isotopic study of uranium: determining the isotopic fractionation of uranium during abiotic reduction with iron(II). [Internet] [Thesis]. University of Illinois – Urbana-Champaign; 2015. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/2142/73101.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Grimm T. Isotopic study of uranium: determining the isotopic fractionation of uranium during abiotic reduction with iron(II). [Thesis]. University of Illinois – Urbana-Champaign; 2015. Available from: http://hdl.handle.net/2142/73101
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Georgia Tech
8.
Minnici, Krysten.
Polymeric Binder Design Frameworks for High Capacity Li-ion Battery Anodes.
Degree: PhD, Chemical and Biomolecular Engineering, 2019, Georgia Tech
URL: http://hdl.handle.net/1853/63528
► Battery electrodes are complex mesoscale systems comprised of an active material, conductive agent, current collector, and polymeric binder. While the focus of research related to…
(more)
▼ Battery electrodes are complex mesoscale systems comprised of an active material, conductive agent, current collector, and polymeric binder. While the focus of research related to the design of robust, high-performance Li-ion batteries relates to the synthesis of active particles, the binder plays a crucial role in stability and ensures electrode integrity during volume changes that occur with cycling. Conventional polymeric binders such as poly(vinylidene difluoride) generally do not interact with active particle surfaces and fail to accommodate large changes in particle spacing during cycling. Recently, a poly[3-(potassium-4-butanoate)thiophene] (PPBT) binder component, coupled with a polyethylene glycol (PEG) surface coating for the active material was demonstrated to enhance both electron and ion transport in
magnetite based anodes; and it was established that the PEG/PPBT approach aids in overall battery electrode performance.
In this thesis, the PEG/PPBT system is first used as a model polymeric binder system for understanding cation effects in anode systems. Potassium showed the most stable electrochemical performance, which is attributed to cation size and proposed to be a result of higher ionic conductivity. Next, a series of water-soluble, carboxylated polymers with varying functional groups were investigated as alternative polymeric binders to aid in electron and ion transport in
magnetite-based anodes. Conjugated polymers under investigation include PPBT, a poly(3,4-ethylenedioxythiophene) (PEDOT) derivative, and the potassium salt form of poly(acrylic acid) (PAA-K). The results of this investigation create a framework of desirable qualities necessary for polymeric binders by investigating how different functional groups aid or hinder overall electrochemical performance in the overall design of composite Li-ion battery anodes. Finally, the model PPBT polymer was functionalized onto the
magnetite surface using two functionalization methods. Direct attachment of the polymer onto the
magnetite surface using Fischer-esterification led to enhanced performance. Additional work focused on understanding polymeric binder and carbon additive interactions for composite electrode design. Altogether, these studies demonstrate frameworks for designing optimal polymeric binders to enhance performance of high-capacity anodes, often hindered by their large volume changes during cycling.
Advisors/Committee Members: Reichmanis, Elsa (advisor), Fuller, Thomas (committee member), Liu, Nian (committee member), Meredith, Carson (committee member), Stingelin, Natalie (committee member).
Subjects/Keywords: Magnetite; Poly(thiophene); Conjugated polyelectrolytes
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Minnici, K. (2019). Polymeric Binder Design Frameworks for High Capacity Li-ion Battery Anodes. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/63528
Chicago Manual of Style (16th Edition):
Minnici, Krysten. “Polymeric Binder Design Frameworks for High Capacity Li-ion Battery Anodes.” 2019. Doctoral Dissertation, Georgia Tech. Accessed January 23, 2021.
http://hdl.handle.net/1853/63528.
MLA Handbook (7th Edition):
Minnici, Krysten. “Polymeric Binder Design Frameworks for High Capacity Li-ion Battery Anodes.” 2019. Web. 23 Jan 2021.
Vancouver:
Minnici K. Polymeric Binder Design Frameworks for High Capacity Li-ion Battery Anodes. [Internet] [Doctoral dissertation]. Georgia Tech; 2019. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/1853/63528.
Council of Science Editors:
Minnici K. Polymeric Binder Design Frameworks for High Capacity Li-ion Battery Anodes. [Doctoral Dissertation]. Georgia Tech; 2019. Available from: http://hdl.handle.net/1853/63528

Georgia State University
9.
Chidzugwe, Joshua M.
Experimental Reduction Of Fe-Oxyhydroxides In Simulated Carbonate and Sulfide/Sulfate Brine: Implications for Paleolake Deposits.
Degree: MS, Geosciences, 2020, Georgia State University
URL: https://scholarworks.gsu.edu/geosciences_theses/139
► Mineral reduction simulations imitating various geochemical environments were conducted over 1 – 30 hours. Ferrihydrite was prepared from solid phases using a solvent-deficient method.…
(more)
▼ Mineral reduction simulations imitating various geochemical environments were conducted over 1 – 30 hours. Ferrihydrite was prepared from solid phases using a solvent-deficient method. In each experiment, ferrihydrite was abiotically reduced with sodium dithionite solution in 1 Molar buffered Na-carbonate and Na-sulfate/sulfide brine at 70°C under nitrogen atmosphere. Six (n=6) and ten (n=10) samples of resultant sulfate/sulfide and carbonate precipitates were collected, respectively. X-Ray Diffractometry (XRD) and Scanning Electron Microscopy (SEM) analytical methods were used to characterize the experimental products. Diagenetic siderite and goethite in carbonate simulations were identified with XRD. Siderite was observed as spherules and platy structures possibly of chukanovite. Calculations using PHREEQ software predicted siderite and pyrite forming in carbonate and sulfate/sulfide brines respectively. The expected pyrite did not precipitate. Rather
magnetite, which was unexpected, was formed by either partial reduction of ferrihydrite or partial oxidation of an intermediate reduced phase such as wüstite. Understanding the diagenetic pathways and water-mineral interactions of these systems is necessary for paleoenvironmental reconstruction and for the fidelity of paleomagnetic records.
Advisors/Committee Members: Prof. Daniel Deocampo, Prof. W. Crawford Elliott, Prof. Nadine Kabengi.
Subjects/Keywords: Ferrihydrite; Diagenesis; Reduction; Siderite; Magnetite.
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APA (6th Edition):
Chidzugwe, J. M. (2020). Experimental Reduction Of Fe-Oxyhydroxides In Simulated Carbonate and Sulfide/Sulfate Brine: Implications for Paleolake Deposits. (Thesis). Georgia State University. Retrieved from https://scholarworks.gsu.edu/geosciences_theses/139
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Chidzugwe, Joshua M. “Experimental Reduction Of Fe-Oxyhydroxides In Simulated Carbonate and Sulfide/Sulfate Brine: Implications for Paleolake Deposits.” 2020. Thesis, Georgia State University. Accessed January 23, 2021.
https://scholarworks.gsu.edu/geosciences_theses/139.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Chidzugwe, Joshua M. “Experimental Reduction Of Fe-Oxyhydroxides In Simulated Carbonate and Sulfide/Sulfate Brine: Implications for Paleolake Deposits.” 2020. Web. 23 Jan 2021.
Vancouver:
Chidzugwe JM. Experimental Reduction Of Fe-Oxyhydroxides In Simulated Carbonate and Sulfide/Sulfate Brine: Implications for Paleolake Deposits. [Internet] [Thesis]. Georgia State University; 2020. [cited 2021 Jan 23].
Available from: https://scholarworks.gsu.edu/geosciences_theses/139.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Chidzugwe JM. Experimental Reduction Of Fe-Oxyhydroxides In Simulated Carbonate and Sulfide/Sulfate Brine: Implications for Paleolake Deposits. [Thesis]. Georgia State University; 2020. Available from: https://scholarworks.gsu.edu/geosciences_theses/139
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Alberta
10.
Mann, Ajaypal S.
Removal of model waste-water bacteria by magnetite in water
and waste-water treatment processes.
Degree: MS, Department of Civil and Environmental
Engineering, 2012, University of Alberta
URL: https://era.library.ualberta.ca/files/jq085k29f
► Conventional disinfection processes used for water and waste-water treatment such as chlorination, and ozonation produce disinfection by products which are carcinogenic. The use of magnetite…
(more)
▼ Conventional disinfection processes used for water and
waste-water treatment such as chlorination, and ozonation produce
disinfection by products which are carcinogenic. The use of
magnetite as an alternative method of removing pathogenic
microorganisms from the water streams was proposed as it does not
produce any harmful by products. The removal of three model
bacteria Escherichia coli ATCC® 25922™, Pseudomonas putida ATCC®
17453™ and Micrococcus luteus ATCC® 4698™ using magnetite and the
mechanism of removal has been studied in this thesis. It was found
that at a cell : magnetite ratio of 1:50 the removal of bacterial
cells was 96.8% for E. coli, 94.8% for P. putida and 99.7% for M
luteus. To better understand the removal mechanism the effect of
varying magnetite ratios, buffers, pH, and mixing times were also
studied. The analyses indicate that magnetite could be efficiently
used for disinfection processes in water and waste-water treatment
industry.
Subjects/Keywords: Water treatment; Magnetite; Wastewater treatment; Bacteria; disinfection
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Mann, A. S. (2012). Removal of model waste-water bacteria by magnetite in water
and waste-water treatment processes. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/jq085k29f
Chicago Manual of Style (16th Edition):
Mann, Ajaypal S. “Removal of model waste-water bacteria by magnetite in water
and waste-water treatment processes.” 2012. Masters Thesis, University of Alberta. Accessed January 23, 2021.
https://era.library.ualberta.ca/files/jq085k29f.
MLA Handbook (7th Edition):
Mann, Ajaypal S. “Removal of model waste-water bacteria by magnetite in water
and waste-water treatment processes.” 2012. Web. 23 Jan 2021.
Vancouver:
Mann AS. Removal of model waste-water bacteria by magnetite in water
and waste-water treatment processes. [Internet] [Masters thesis]. University of Alberta; 2012. [cited 2021 Jan 23].
Available from: https://era.library.ualberta.ca/files/jq085k29f.
Council of Science Editors:
Mann AS. Removal of model waste-water bacteria by magnetite in water
and waste-water treatment processes. [Masters Thesis]. University of Alberta; 2012. Available from: https://era.library.ualberta.ca/files/jq085k29f
11.
Van Laeren, Laura Jane.
Investigation of thiazyl radical – metalloporphyrin complexes.
Degree: PhD, Chemistry and Polymer Science, 2017, Stellenbosch University
URL: http://hdl.handle.net/10019.1/101402
► ENGLISH ABSTRACT: The aim of this project was to investigate the formation of novel dithiadiazolyl-metalloporphyrin complexes with the goal of forming complexes with interesting magnetic,…
(more)
▼ ENGLISH ABSTRACT: The aim of this project was to investigate the formation of novel dithiadiazolyl-metalloporphyrin
complexes with the goal of forming complexes with interesting magnetic, conductive or redox
behaviour. The crystal structure of one such dithiadiazolyl radical – metalloporphyrin complex,
containing 4-(4′-pyridyl)-1,2,3,5-dithiadiazolyl and cobalt (II) tetraphenylporphyrin, was determined
through the use of single crystal X-ray diffraction. The complex crystallizes as a coordination polymer,
with each dithiadiazolyl radical bridging two cobalt porphyrins via a dithiadiazolyl sulfur atom and the
pyridyl nitrogen. The sulfur-sulfur bond remains intact and is unusually long; it is proposed that this is
as a result of delocalisation of the unpaired electron from the cobalt ion to the dithiadiazolyl radical,
resulting in partial oxidation of the Co(II) centre with associated partial reduction of the dithiadiazolyl
radical to a dithiadiazolide anion. This is only the third example of an isolated dithiadiazolyl anion. In
solution, initial coordination occurs through the dithiadiazolyl sulfur atom. Following dissolution, the
nitrogen-bound species predominates. Ligand-metalloporphyrin association was studied in solution
through the use of ultraviolet-visible spectroscopy and a logβ value of 4.19 ± 0.05 in dichloromethane
at 25 °C was determined. The interaction between a range of eight dithiadiazolyl radicals and three different cobalt porphyrins was subsequently studied spectroscopically. It was found that changing the
substituents on the dithiadiazolyl radical has a limited effect on the strength of coordination, while
changing the substituents on the porphyrin has a far greater effect. When electron-donating substituents
were added, logβ values were higher than for the parent porphyrin while electron-withdrawing
substituents resulted in lower logβ values with respect to any of the dithiadiazolyl ligands. Electrostatic
potential maps were generated to provide further insight into the electron density across the eight
dithiadiazolyl radicals and confirmed that the substituents had a negligible effect on the coordinating
sulfur atoms, rationalising the spectrophotometric observations. Coordination of dithiadiazolyl radicals
to cobalt, copper, iron and zinc porphyrins was reported, with negligible interaction with magnesium.
Coordination to copper and iron was weaker than for cobalt, while coordination to zinc was stronger.
The choice of metal affects the magnetic behaviour of the complexes. Coordination to a paramagnetic
metal centre, such as cobalt, copper and iron, results in a diamagnetic complex, while coordination to
the diamagnetic zinc leads to paramagnetic complexes. These zinc complexes associate at high concentration, leading to loss of paramagnetism. Finally, coordination of dithiadiazolyl radicals to
haematin, an iron-containing biological metalloporphyrin, was investigated in order to illustrate a
potential application of these dithiadiazolyl complexes to the…
Advisors/Committee Members: Haynes, Delia A., De Villiers, Katherine A., Stellenbosch University. Faculty of Science. Dept. of Chemistry and Polymer Science..
Subjects/Keywords: Dithiadiazolyl complexes; Metalloporphyrin; Magnetite crystals; UCTD
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Van Laeren, L. J. (2017). Investigation of thiazyl radical – metalloporphyrin complexes. (Doctoral Dissertation). Stellenbosch University. Retrieved from http://hdl.handle.net/10019.1/101402
Chicago Manual of Style (16th Edition):
Van Laeren, Laura Jane. “Investigation of thiazyl radical – metalloporphyrin complexes.” 2017. Doctoral Dissertation, Stellenbosch University. Accessed January 23, 2021.
http://hdl.handle.net/10019.1/101402.
MLA Handbook (7th Edition):
Van Laeren, Laura Jane. “Investigation of thiazyl radical – metalloporphyrin complexes.” 2017. Web. 23 Jan 2021.
Vancouver:
Van Laeren LJ. Investigation of thiazyl radical – metalloporphyrin complexes. [Internet] [Doctoral dissertation]. Stellenbosch University; 2017. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/10019.1/101402.
Council of Science Editors:
Van Laeren LJ. Investigation of thiazyl radical – metalloporphyrin complexes. [Doctoral Dissertation]. Stellenbosch University; 2017. Available from: http://hdl.handle.net/10019.1/101402

Penn State University
12.
Raman, Balaji.
DEPOSITION OF MAGNETITE IN HIGH TEMPERATURE BOILER ENVIRONMENTS.
Degree: 2017, Penn State University
URL: https://submit-etda.libraries.psu.edu/catalog/13699bxr932
► Suspended magnetite particles in boiler water may deposit in lower orifice headers in forced circulation boilers, impeding flow and causing inefficiencies, ultimately leading to overheating…
(more)
▼ Suspended
magnetite particles in boiler water may deposit in lower orifice headers in forced circulation boilers, impeding flow and causing inefficiencies, ultimately leading to overheating boiler tube failures. The surface charge and zeta potential developed by the suspended particles could be a driving factor in this process. To study the mechanism behind the deposition of suspended
magnetite on stainless steel, laboratory-scale experiments were carried out under a range of standard boiler water chemistry, simulating fouling experienced in boiler units. A high-temperature–high-pressure electrophoretic deposition cell with provisions to test deposition on metal substrates has been developed. The trends in the deposition processes for the various chemistry were validated using visual observations, surface microscopy, and in situ electrochemical impedance spectroscopy (EIS). A three-electrode assembly design was developed to carry out the in situ electrochemical measurements in various boiler water environments. The experimental setup was successfully used to test boiler water chemistry at 300°C (572°F) and 10 MPa (1450 psi). The chemistry tested included all-volatile treatment (AVT; oxidizing and reducing using hydrazine), caustic treatment (CT), phosphate treatment (PT), and a filming amine (GE HRSG-02). In addition, the effect of particle size on the deposition process was studied.
The experimental results have been explained using established principles of suspended oxide behavior in aqueous environments. The results indicated that the presence of suspended
magnetite particles at a pH25°C = 9.3, controlled by ammonium hydroxide, caused the particles to aggressively deposit on the stainless steel surface. On the other end of the AVT spectrum, when tested at pH25°C = 9.8, no visually observable deposits were found on the surface of the steel. Operating close to the point of zero charge of
magnetite at 300 °C resulted in deposition and moving away from the point of zero charge mitigated deposition. In case of the caustic treatment and phosphate treatment, it was seen that the compression of the double layer due to the additional electrolytes in the system could influence the deposition process even when the pH of the system was away from the point of zero charge of
magnetite at 300°C. No significant influence of hydrazine was observed on the deposition of
magnetite. Impedance spectroscopy was successfully used in these tests to identify in situ the cases where deposition occurred.
The filming amine chemistry did not mitigate deposition completely, but the presence of the HRSG-02 affected the nature of deposits observed on the substrate. Macroscopically the substrate appeared to be covered with deposits and some darker regions. The results of the filming amine study point to possible interactions between the amine-substrate and amine-
magnetite. Increasing the particle size distribution clearly showed a decrease in the deposition even though the boiler water chemistry was conducive for deposition. Although,…
Advisors/Committee Members: Serguei N Lvov, Dissertation Advisor/Co-Advisor, Serguei N. Lvov, Committee Chair/Co-Chair, Sarma V. Pisupati, Committee Member, Zuleima T. Karpyn, Committee Member, James Adair, Outside Member.
Subjects/Keywords: Deposition; fouling; magnetite; boilers; DLVO interaction energy
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Raman, B. (2017). DEPOSITION OF MAGNETITE IN HIGH TEMPERATURE BOILER ENVIRONMENTS. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/13699bxr932
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Raman, Balaji. “DEPOSITION OF MAGNETITE IN HIGH TEMPERATURE BOILER ENVIRONMENTS.” 2017. Thesis, Penn State University. Accessed January 23, 2021.
https://submit-etda.libraries.psu.edu/catalog/13699bxr932.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Raman, Balaji. “DEPOSITION OF MAGNETITE IN HIGH TEMPERATURE BOILER ENVIRONMENTS.” 2017. Web. 23 Jan 2021.
Vancouver:
Raman B. DEPOSITION OF MAGNETITE IN HIGH TEMPERATURE BOILER ENVIRONMENTS. [Internet] [Thesis]. Penn State University; 2017. [cited 2021 Jan 23].
Available from: https://submit-etda.libraries.psu.edu/catalog/13699bxr932.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Raman B. DEPOSITION OF MAGNETITE IN HIGH TEMPERATURE BOILER ENVIRONMENTS. [Thesis]. Penn State University; 2017. Available from: https://submit-etda.libraries.psu.edu/catalog/13699bxr932
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Toronto
13.
Foroozan Ebrahimy, Amirhossein.
Electrochemical Study of the Effects of Sulfur and Lead Relevant to Nuclear Steam Generators.
Degree: 2017, University of Toronto
URL: http://hdl.handle.net/1807/79125
► Steam Generators contain crevices at tube surfaces where they contact tubesheets, in which solids accumulate. Within this matrix there are elusive effects of impurities including…
(more)
▼ Steam Generators contain crevices at tube surfaces where they contact tubesheets, in which solids accumulate. Within this matrix there are elusive effects of impurities including sulfate and lead ions. Exposure to environments containing reduced sulfur species can result in rapid corrosion or cracking of Ni-Fe-Cr alloys, mediated by adsorption of sulfur mainly on the nickel component. The important aspect of the lead effect is the adsorption of zero-valent species on the metal. This disrupts the surface oxide network and facilitates its undercutting. The viability of sulfate reduction at elevated temperature and the effects of sulfur and lead on nickel dissolution and undercutting of the protective oxide layer has been examined via electrochemical measurements. Experiments done at different pH suggested that sulfate reduction is more likely to occur in acidic environment. Studies on joint lead-sulfur effects on nickel at ambient temperature revealed that sulfur can replace lead and dominate the surface.
M.A.S.
Advisors/Committee Members: Newman, Roger C., Chemical Engineering Applied Chemistry.
Subjects/Keywords: Adsorption; Corrosion; Lead; Magnetite; Nickel; Sulfur; 0794
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Foroozan Ebrahimy, A. (2017). Electrochemical Study of the Effects of Sulfur and Lead Relevant to Nuclear Steam Generators. (Masters Thesis). University of Toronto. Retrieved from http://hdl.handle.net/1807/79125
Chicago Manual of Style (16th Edition):
Foroozan Ebrahimy, Amirhossein. “Electrochemical Study of the Effects of Sulfur and Lead Relevant to Nuclear Steam Generators.” 2017. Masters Thesis, University of Toronto. Accessed January 23, 2021.
http://hdl.handle.net/1807/79125.
MLA Handbook (7th Edition):
Foroozan Ebrahimy, Amirhossein. “Electrochemical Study of the Effects of Sulfur and Lead Relevant to Nuclear Steam Generators.” 2017. Web. 23 Jan 2021.
Vancouver:
Foroozan Ebrahimy A. Electrochemical Study of the Effects of Sulfur and Lead Relevant to Nuclear Steam Generators. [Internet] [Masters thesis]. University of Toronto; 2017. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/1807/79125.
Council of Science Editors:
Foroozan Ebrahimy A. Electrochemical Study of the Effects of Sulfur and Lead Relevant to Nuclear Steam Generators. [Masters Thesis]. University of Toronto; 2017. Available from: http://hdl.handle.net/1807/79125

University of Waikato
14.
O'Shea, Benjamin.
The preparation of fluorescent fingerprinting powders using 8-hydroxyquinoline compounds and magnetite
.
Degree: 2018, University of Waikato
URL: http://hdl.handle.net/10289/12287
► Fluorescent fingerprinting powders were prepared by using rotary evaporation to coat magnetite powder with varying amounts of either tris(8-hydroxyquinolinato)aluminium (Alq₃), tris(8-hydroxyquinolinato)gallium (Gaq₃), bis(8-hydroxyquinolinato)magnesium (Mgq₂) or…
(more)
▼ Fluorescent fingerprinting powders were prepared by using rotary evaporation to coat
magnetite powder with varying amounts of either tris(8-hydroxyquinolinato)aluminium (Alq₃), tris(8-hydroxyquinolinato)gallium (Gaq₃), bis(8-hydroxyquinolinato)magnesium (Mgq₂) or bis(8-hydroxyquinolinato)zinc (Znq₂). The performance of each fingerprinting powder was tested on various surfaces under visible light and under UV excitation. The efficacy of powder application using a magnetic brush was compared to that of standard brushes. The effects of varying the particle sizes of the fingerprinting powders made with Alq₃ and Znq₂ were explored. The stability of each fluorescent compound under standard conditions was tested.
The synthesis of sodium tetrakis(8-hydroxyquinolinato)boron (NaBq₄) was attempted twice, but failed both times. The product acquired was suspected to be Na₄(C₉H₆NO)₄(H₂O)₈ (Na₄q₄(H₂O)₈) instead. Crystals of Na₄q₄(H₂O)₈ were prepared using a modified literature method. The Na₄q₄(H₂O)₈ crystals and the products of the attempted syntheses were characterised by powder X-ray crystal diffraction, inductively coupled plasma mass spectrometry, electrospray ionisation mass spectrometry, nuclear magnetic resonance spectroscopy, UV-Vis absorption, and melting point measurements. Fingerprint powders were prepared using the products of the attempted NaBq₄ syntheses and tested in the same manner as the Alq₃, Gaq₃, Znq₂, and Mgq₂ fingerprint powders.
Advisors/Committee Members: Henderson, William (advisor).
Subjects/Keywords: Fingerprint;
Fluorescent;
8-Hydroxyquinoline;
Hydroxyquinoline;
Magnetite;
Alq₃
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
O'Shea, B. (2018). The preparation of fluorescent fingerprinting powders using 8-hydroxyquinoline compounds and magnetite
. (Masters Thesis). University of Waikato. Retrieved from http://hdl.handle.net/10289/12287
Chicago Manual of Style (16th Edition):
O'Shea, Benjamin. “The preparation of fluorescent fingerprinting powders using 8-hydroxyquinoline compounds and magnetite
.” 2018. Masters Thesis, University of Waikato. Accessed January 23, 2021.
http://hdl.handle.net/10289/12287.
MLA Handbook (7th Edition):
O'Shea, Benjamin. “The preparation of fluorescent fingerprinting powders using 8-hydroxyquinoline compounds and magnetite
.” 2018. Web. 23 Jan 2021.
Vancouver:
O'Shea B. The preparation of fluorescent fingerprinting powders using 8-hydroxyquinoline compounds and magnetite
. [Internet] [Masters thesis]. University of Waikato; 2018. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/10289/12287.
Council of Science Editors:
O'Shea B. The preparation of fluorescent fingerprinting powders using 8-hydroxyquinoline compounds and magnetite
. [Masters Thesis]. University of Waikato; 2018. Available from: http://hdl.handle.net/10289/12287

University of Newcastle
15.
Alam, Mohammad Khairul.
Advanced applications of tunable magnetite nanofluids in energy systems and energy harvesters.
Degree: PhD, 2018, University of Newcastle
URL: http://hdl.handle.net/1959.13/1385053
► Research Doctorate - Doctor of Philosophy (PhD)
The properties of nanofluids have the potential to provide a wide range of resources to overcome energy associated…
(more)
▼ Research Doctorate - Doctor of Philosophy (PhD)
The properties of nanofluids have the potential to provide a wide range of resources to overcome energy associated difficulties, in addition to offering new ways to gain, store and exchange of energy. A significant improvement in energy saving is possible by improving the performance of a heat exchanger circuit and may in part alleviate current challenging issues such as global warming, climate change and the fuel crisis. Ferrofluids or Magnetic nanofluids are the suspensions of magnetic nanoparticles and non-magnetic base fluid. Ferrofluids have drawn considerable attention due to the possibility of tuning their heat transfer and flow properties through the application of an external magnetic field. They can also be utilised to improve the performance of an energy harvester, which can supply power and enhance the capability, assertion and lifespan of those devices where batteries or direct electricity are currently used as the primary source of power. Electromagnetic ferrofluid based energy harvesters convert the ferrofluids’ sloshing movement into electromotive force (EMF), hence it is necessary to estimate the feasibility, stability and efficacy of ferrofluids through several physico-chemical studies. This study is divided into five different sections. Initially, we look at the preparation of various conventional metal oxide nanofluids, their stability and thermophysical properties. Secondly, the heat transfer performance of these conventional nanofluids under various flow conditions as well as the different amount of surfactant in the nanosuspensions is considered. Then the focus is shifted to the specific case of magnetite nanofluids, which includes the preparation and characterisation of magnetite nanofluid. This is followed by the heat transfer performance measurement of this colloid compared to the conventional nanofluids by varying the external magnets configurations. Finally, different types of magnetite nanofluids are implemented in vibration-based energy harvester. Stability of nanofluids is a major concern in heat transfer applications. The objective of this work is to prepare a stable Al2O3/DI-water, CuO/DI-water and Fe3O4/DI-water nanofluids with the aim of applying them in the novel heat transfer applications as well as energy harvester devices. This study is investigated the overall stability of Al2O3 and CuO nanofluids with respect to pH, zeta potential, particle size distribution and its effect on viscosity and thermal conductivity at various weight concentrations of anionic surfactants (sodium dodecylbenzene sulfonate). The results clearly showed that nanofluid’s stability has a strong effect on viscosity and thermal conductivity of these colloids. The stability of the nanofluids is enhanced with a decrease in viscosity and an increase in thermal conductivity. Furthermore, water based polymer coated Fe3O4 nanofluids are prepared by using a chemical…
Advisors/Committee Members: University of Newcastle. Faculty of Engineering & Built Environment, School of Engineering.
Subjects/Keywords: tunable magnetite nanofluids; energy systems; energy harvesters
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Alam, M. K. (2018). Advanced applications of tunable magnetite nanofluids in energy systems and energy harvesters. (Doctoral Dissertation). University of Newcastle. Retrieved from http://hdl.handle.net/1959.13/1385053
Chicago Manual of Style (16th Edition):
Alam, Mohammad Khairul. “Advanced applications of tunable magnetite nanofluids in energy systems and energy harvesters.” 2018. Doctoral Dissertation, University of Newcastle. Accessed January 23, 2021.
http://hdl.handle.net/1959.13/1385053.
MLA Handbook (7th Edition):
Alam, Mohammad Khairul. “Advanced applications of tunable magnetite nanofluids in energy systems and energy harvesters.” 2018. Web. 23 Jan 2021.
Vancouver:
Alam MK. Advanced applications of tunable magnetite nanofluids in energy systems and energy harvesters. [Internet] [Doctoral dissertation]. University of Newcastle; 2018. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/1959.13/1385053.
Council of Science Editors:
Alam MK. Advanced applications of tunable magnetite nanofluids in energy systems and energy harvesters. [Doctoral Dissertation]. University of Newcastle; 2018. Available from: http://hdl.handle.net/1959.13/1385053

Wichita State University
16.
Abedin, Farhana.
Magnetic and albumin targeted drug delivery for breast cancer treatment
.
Degree: 2011, Wichita State University
URL: http://hdl.handle.net/10057/5054
► This research work involves multifunctional magnetically targeted drug delivery microspheres for treatment against breast cancer. A combination therapy approach was followed by encapsulating two chemotherapeutics,…
(more)
▼ This research work involves multifunctional magnetically targeted drug delivery
microspheres for treatment against breast cancer. A combination therapy approach was followed
by encapsulating two chemotherapeutics, 5-Fluorouracil (5-Fu) and cyclophosphamide in
poly(D, L-lactide-co-glycolide) (PLGA) microspheres.
Magnetite nanoparticles and albumin
were also incorporated in the microspheres to achieve targeted treatment. The microspheres were
fabricated using oil-in-oil emulsion/solvent evaporation technique. Albumin is attracted to cancer
cells and thus it is likely to draw the microspheres towards tumor cells. On application of
magnetic field near tumor site, magnetites in the microspheres are likely to guide them to the
region of magnetic field. This will allow release of drugs from microspheres in the cancer cells.
Also the burst release of drugs and then slow release due to diffusion in the cancer cells lead to
effective treatment and also limit excessive spreading of drugs in other regions of the body.
Release rate study was carried out using high performance liquid chromatography (HPLC). Invitro
and in-vivo study was carried out to check the efficacy of treatment.
Advisors/Committee Members: Asmatulu, Ramazan (advisor).
Subjects/Keywords: Targeted drug delivery;
Magnetite nanoparticle;
Breast cancer
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Abedin, F. (2011). Magnetic and albumin targeted drug delivery for breast cancer treatment
. (Masters Thesis). Wichita State University. Retrieved from http://hdl.handle.net/10057/5054
Chicago Manual of Style (16th Edition):
Abedin, Farhana. “Magnetic and albumin targeted drug delivery for breast cancer treatment
.” 2011. Masters Thesis, Wichita State University. Accessed January 23, 2021.
http://hdl.handle.net/10057/5054.
MLA Handbook (7th Edition):
Abedin, Farhana. “Magnetic and albumin targeted drug delivery for breast cancer treatment
.” 2011. Web. 23 Jan 2021.
Vancouver:
Abedin F. Magnetic and albumin targeted drug delivery for breast cancer treatment
. [Internet] [Masters thesis]. Wichita State University; 2011. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/10057/5054.
Council of Science Editors:
Abedin F. Magnetic and albumin targeted drug delivery for breast cancer treatment
. [Masters Thesis]. Wichita State University; 2011. Available from: http://hdl.handle.net/10057/5054

Michigan State University
17.
Kim, Joon Yol.
Hydrostatic pressure effects on saturation remanent magnetization, susceptibility and magnetic hardness of magnetite.
Degree: MS, 1976, Michigan State University
URL: http://etd.lib.msu.edu/islandora/object/etd:7417
Subjects/Keywords: Magnetite; Magnetostriction; Geophysics
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APA (6th Edition):
Kim, J. Y. (1976). Hydrostatic pressure effects on saturation remanent magnetization, susceptibility and magnetic hardness of magnetite. (Masters Thesis). Michigan State University. Retrieved from http://etd.lib.msu.edu/islandora/object/etd:7417
Chicago Manual of Style (16th Edition):
Kim, Joon Yol. “Hydrostatic pressure effects on saturation remanent magnetization, susceptibility and magnetic hardness of magnetite.” 1976. Masters Thesis, Michigan State University. Accessed January 23, 2021.
http://etd.lib.msu.edu/islandora/object/etd:7417.
MLA Handbook (7th Edition):
Kim, Joon Yol. “Hydrostatic pressure effects on saturation remanent magnetization, susceptibility and magnetic hardness of magnetite.” 1976. Web. 23 Jan 2021.
Vancouver:
Kim JY. Hydrostatic pressure effects on saturation remanent magnetization, susceptibility and magnetic hardness of magnetite. [Internet] [Masters thesis]. Michigan State University; 1976. [cited 2021 Jan 23].
Available from: http://etd.lib.msu.edu/islandora/object/etd:7417.
Council of Science Editors:
Kim JY. Hydrostatic pressure effects on saturation remanent magnetization, susceptibility and magnetic hardness of magnetite. [Masters Thesis]. Michigan State University; 1976. Available from: http://etd.lib.msu.edu/islandora/object/etd:7417

Michigan State University
18.
Sanderson, Dewey Dennis, 1942-.
Magnetic minerals and properties of the Melrose Stock.
Degree: PhD, Department of Geology, 1972, Michigan State University
URL: http://etd.lib.msu.edu/islandora/object/etd:36363
Subjects/Keywords: Petrology – Nevada; Magnetite
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APA (6th Edition):
Sanderson, Dewey Dennis, 1. (1972). Magnetic minerals and properties of the Melrose Stock. (Doctoral Dissertation). Michigan State University. Retrieved from http://etd.lib.msu.edu/islandora/object/etd:36363
Chicago Manual of Style (16th Edition):
Sanderson, Dewey Dennis, 1942-. “Magnetic minerals and properties of the Melrose Stock.” 1972. Doctoral Dissertation, Michigan State University. Accessed January 23, 2021.
http://etd.lib.msu.edu/islandora/object/etd:36363.
MLA Handbook (7th Edition):
Sanderson, Dewey Dennis, 1942-. “Magnetic minerals and properties of the Melrose Stock.” 1972. Web. 23 Jan 2021.
Vancouver:
Sanderson, Dewey Dennis 1. Magnetic minerals and properties of the Melrose Stock. [Internet] [Doctoral dissertation]. Michigan State University; 1972. [cited 2021 Jan 23].
Available from: http://etd.lib.msu.edu/islandora/object/etd:36363.
Council of Science Editors:
Sanderson, Dewey Dennis 1. Magnetic minerals and properties of the Melrose Stock. [Doctoral Dissertation]. Michigan State University; 1972. Available from: http://etd.lib.msu.edu/islandora/object/etd:36363

University of Ontario Institute of Technology
19.
Egan, Jacquelyn G.
The Functionalization of Magnetic [email protected] by Molecular Motif for the Detection of Mercury (II).
Degree: 2019, University of Ontario Institute of Technology
URL: http://hdl.handle.net/10155/1072
► 2,6-bis(2-thienyl)pyridine (L) molecular receptor showed strong potential for Hg2+ detection. The chelation through S,N,S was confirmed as a main binding mode of the ligand with…
(more)
▼ 2,6-bis(2-thienyl)pyridine (L) molecular receptor showed strong potential for Hg2+ detection. The chelation through S,N,S was confirmed as a main binding mode of the ligand with Hg2+ ion based on the results of 1H NMR. L showed a strong characteristic fluorescence signal at 413 nm in the absence of Hg2+; however, this signal was quenched when Hg2+ was introduced and a new fluorescence signal at 563 nm appeared. L was anchored into the surface of the coated
magnetite microspheres (
[email protected]) through a siloxane template layer and was fully characterized using thermogravimetric analysis (TGA) and X-ray photoelectron spectroscopy (XPS). Detailed emission studies showed the ability of the L and
[email protected] not only effectively detect Hg2+ but differentiate it from competing Zn2+, Cd2+,Cu2+,Cr3+,Co2+,Ru3+, Fe2+ ions in solution with minimum interference. Magnetic micropsheres decorated by L showed promising performance as single ???excitation -single emission sensor for Hg2+ ions and effective mercury uptake.
Advisors/Committee Members: Zenkina, Olena.
Subjects/Keywords: Mercury; Magnetite; Fluorscence; Surface sensor; Thiophene
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APA (6th Edition):
Egan, J. G. (2019). The Functionalization of Magnetic [email protected] by Molecular Motif for the Detection of Mercury (II). (Thesis). University of Ontario Institute of Technology. Retrieved from http://hdl.handle.net/10155/1072
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Egan, Jacquelyn G. “The Functionalization of Magnetic [email protected] by Molecular Motif for the Detection of Mercury (II).” 2019. Thesis, University of Ontario Institute of Technology. Accessed January 23, 2021.
http://hdl.handle.net/10155/1072.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Egan, Jacquelyn G. “The Functionalization of Magnetic [email protected] by Molecular Motif for the Detection of Mercury (II).” 2019. Web. 23 Jan 2021.
Vancouver:
Egan JG. The Functionalization of Magnetic [email protected] by Molecular Motif for the Detection of Mercury (II). [Internet] [Thesis]. University of Ontario Institute of Technology; 2019. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/10155/1072.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Egan JG. The Functionalization of Magnetic [email protected] by Molecular Motif for the Detection of Mercury (II). [Thesis]. University of Ontario Institute of Technology; 2019. Available from: http://hdl.handle.net/10155/1072
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Arizona
20.
Green, William Delap, 1936-.
The location of trace quantities of uranium and thorium associated with magnetite
.
Degree: 1962, University of Arizona
URL: http://hdl.handle.net/10150/347454
Subjects/Keywords: Magnetite.;
Thorium.;
Uranium.
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APA ·
Chicago ·
MLA ·
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CSE |
Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Green, William Delap, 1. (1962). The location of trace quantities of uranium and thorium associated with magnetite
. (Masters Thesis). University of Arizona. Retrieved from http://hdl.handle.net/10150/347454
Chicago Manual of Style (16th Edition):
Green, William Delap, 1936-. “The location of trace quantities of uranium and thorium associated with magnetite
.” 1962. Masters Thesis, University of Arizona. Accessed January 23, 2021.
http://hdl.handle.net/10150/347454.
MLA Handbook (7th Edition):
Green, William Delap, 1936-. “The location of trace quantities of uranium and thorium associated with magnetite
.” 1962. Web. 23 Jan 2021.
Vancouver:
Green, William Delap 1. The location of trace quantities of uranium and thorium associated with magnetite
. [Internet] [Masters thesis]. University of Arizona; 1962. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/10150/347454.
Council of Science Editors:
Green, William Delap 1. The location of trace quantities of uranium and thorium associated with magnetite
. [Masters Thesis]. University of Arizona; 1962. Available from: http://hdl.handle.net/10150/347454

University of Arizona
21.
Whittier, Donald Andrews, 1935-.
Character and distribution of mineralization associated with magnetite bodies northeast of Aquila, Michoacan, Mexico
.
Degree: 1964, University of Arizona
URL: http://hdl.handle.net/10150/551733
Subjects/Keywords: Magnetite.;
Geology – Mexico.
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Export
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APA (6th Edition):
Whittier, Donald Andrews, 1. (1964). Character and distribution of mineralization associated with magnetite bodies northeast of Aquila, Michoacan, Mexico
. (Masters Thesis). University of Arizona. Retrieved from http://hdl.handle.net/10150/551733
Chicago Manual of Style (16th Edition):
Whittier, Donald Andrews, 1935-. “Character and distribution of mineralization associated with magnetite bodies northeast of Aquila, Michoacan, Mexico
.” 1964. Masters Thesis, University of Arizona. Accessed January 23, 2021.
http://hdl.handle.net/10150/551733.
MLA Handbook (7th Edition):
Whittier, Donald Andrews, 1935-. “Character and distribution of mineralization associated with magnetite bodies northeast of Aquila, Michoacan, Mexico
.” 1964. Web. 23 Jan 2021.
Vancouver:
Whittier, Donald Andrews 1. Character and distribution of mineralization associated with magnetite bodies northeast of Aquila, Michoacan, Mexico
. [Internet] [Masters thesis]. University of Arizona; 1964. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/10150/551733.
Council of Science Editors:
Whittier, Donald Andrews 1. Character and distribution of mineralization associated with magnetite bodies northeast of Aquila, Michoacan, Mexico
. [Masters Thesis]. University of Arizona; 1964. Available from: http://hdl.handle.net/10150/551733

Georgia Tech
22.
Minnici, Krysten.
PEG-coated Fe3O4 for li-Ion battery anodes: Effects of crystallite size and surface chemistry.
Degree: MS, Chemical and Biomolecular Engineering, 2017, Georgia Tech
URL: http://hdl.handle.net/1853/59796
► Battery electrodes are complex mesoscale systems comprised of an active material, conductive agent, current collector, and polymeric binder. Previous work focused on enhancing electron and…
(more)
▼ Battery electrodes are complex mesoscale systems comprised of an active material, conductive agent, current collector, and polymeric binder. Previous work focused on enhancing electron and ion transport in high capacity anode systems by introducing poly[3-(potassium-4- butanoate) thiophene] (PPBT) as a binder component and a polyethylene glycol (PEG) surface coating on
magnetite (Fe3O4) nanoparticles. The PPBT/PEG system will be utilized in this work, which takes a closer look at the active material, Fe3O4, and examines the effects of surface chemistry and crystallite size (10 nm vs. 20 nm) on battery performance. Variations in surface chemistry are due to the synthesis methods used for Fe3O4, which use ammonium hydroxide or triethylamine as a base. XRD and TEM initially characterized the active materials to confirm the
magnetite phase and crystallite size. DLS and zeta potential measurements demonstrated aggregate size and colloidal stability. SEM images of the electrodes, which are composed of Fe3O4 particles, carbon additives, and the PPBT binder, indicate that the bases produce different morphologies. The Fe3O4 particles synthesized with ammonium hydroxide appear more dispersed relative to those made with triethylamine, which could have a significant impact on the battery performance. Furthermore, XPS and FTIR data indicate that these bases produce difference chemical interactions within the electrode. Electrochemical testing demonstrates that the triethylamine-based electrode has a higher capacity and better capacity retention over 100 cycles at 0.3C as compared to the ammonium hydroxide-based electrode. With regards to differences in active material size, the electrodes with 20 nm crystallite size Fe3O4 initially have a higher capacity, but the electrodes with 10 nm crystallite size Fe3O4 have better capacity retention over 100 cycles at 0.3C. Rate capability testing and electrical impedance confirm the superior performance of triethylamine derived electrodes and the 10 nm crystallite size.
Advisors/Committee Members: Reichmanis, Elsa (advisor), Fuller, Thomas (advisor), Meredith, Carson (advisor).
Subjects/Keywords: Li-ion battery; Anode; Fe3O4; Magnetite; PEG
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Minnici, K. (2017). PEG-coated Fe3O4 for li-Ion battery anodes: Effects of crystallite size and surface chemistry. (Masters Thesis). Georgia Tech. Retrieved from http://hdl.handle.net/1853/59796
Chicago Manual of Style (16th Edition):
Minnici, Krysten. “PEG-coated Fe3O4 for li-Ion battery anodes: Effects of crystallite size and surface chemistry.” 2017. Masters Thesis, Georgia Tech. Accessed January 23, 2021.
http://hdl.handle.net/1853/59796.
MLA Handbook (7th Edition):
Minnici, Krysten. “PEG-coated Fe3O4 for li-Ion battery anodes: Effects of crystallite size and surface chemistry.” 2017. Web. 23 Jan 2021.
Vancouver:
Minnici K. PEG-coated Fe3O4 for li-Ion battery anodes: Effects of crystallite size and surface chemistry. [Internet] [Masters thesis]. Georgia Tech; 2017. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/1853/59796.
Council of Science Editors:
Minnici K. PEG-coated Fe3O4 for li-Ion battery anodes: Effects of crystallite size and surface chemistry. [Masters Thesis]. Georgia Tech; 2017. Available from: http://hdl.handle.net/1853/59796

University of Tennessee – Knoxville
23.
Hah, Hien-Yoong.
Mössbauer Spectroscopy of Iron Oxide Nanoparticles: Materials for Biomedical Applications.
Degree: 2018, University of Tennessee – Knoxville
URL: https://trace.tennessee.edu/utk_graddiss/5232
► Nanoparticles of Fe3O4 (magnetite) and gamma-Fe2O3 (maghemite) have been studied by Mössbauer spectroscopy. These nanoparticles have applications as contrast agents for Magnetic Resonance Imaging. At…
(more)
▼ Nanoparticles of Fe3O4 (magnetite) and gamma-Fe2O3 (maghemite) have been studied by Mössbauer spectroscopy. These nanoparticles have applications as contrast agents for Magnetic Resonance Imaging. At room temperature, they are superparamagnetic and the magnetic hyperfine fields were averaged to zero. The spectra of Fe3O4 were composed of two lines corresponding to two crystal sites, identified from their isomer shifts as Fe3+ on the tetrahedral A site and Fe2.5+ (mixed Fe2+ and Fe3+) on the octahedral B site. The relative intensity of the two lines shows that the samples are almost stoichiometric with the formula Fe3-xO4, where x is less than 0.04 at room temperature. The x that was obtained was compared to those obtained in a magnetic field and at room temperature. The lines are broad and the measurements as a function of temperature were analyzed using Néel’s theory of superparamagnetism to yield values of the relaxation times. The same nanoparticles that have oxidized into gamma-Fe2O3 have been studied for comparison.
Subjects/Keywords: Mossbauer; nanoparticles; mri; superparmagnet; stoichiometry; relaxation; magnetite
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APA ·
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APA (6th Edition):
Hah, H. (2018). Mössbauer Spectroscopy of Iron Oxide Nanoparticles: Materials for Biomedical Applications. (Doctoral Dissertation). University of Tennessee – Knoxville. Retrieved from https://trace.tennessee.edu/utk_graddiss/5232
Chicago Manual of Style (16th Edition):
Hah, Hien-Yoong. “Mössbauer Spectroscopy of Iron Oxide Nanoparticles: Materials for Biomedical Applications.” 2018. Doctoral Dissertation, University of Tennessee – Knoxville. Accessed January 23, 2021.
https://trace.tennessee.edu/utk_graddiss/5232.
MLA Handbook (7th Edition):
Hah, Hien-Yoong. “Mössbauer Spectroscopy of Iron Oxide Nanoparticles: Materials for Biomedical Applications.” 2018. Web. 23 Jan 2021.
Vancouver:
Hah H. Mössbauer Spectroscopy of Iron Oxide Nanoparticles: Materials for Biomedical Applications. [Internet] [Doctoral dissertation]. University of Tennessee – Knoxville; 2018. [cited 2021 Jan 23].
Available from: https://trace.tennessee.edu/utk_graddiss/5232.
Council of Science Editors:
Hah H. Mössbauer Spectroscopy of Iron Oxide Nanoparticles: Materials for Biomedical Applications. [Doctoral Dissertation]. University of Tennessee – Knoxville; 2018. Available from: https://trace.tennessee.edu/utk_graddiss/5232

University of British Columbia
24.
Cann, Robert Michael.
Geochemistry of magnetite and the genesis of magnetite-apatite lodes in the iron mask batholith, British Columbia.
Degree: MS- MSc, Geological Sciences, 1979, University of British Columbia
URL: http://hdl.handle.net/2429/21560
► Magnetite-apatite lodes, in the Upper Triassic Iron Mask batholith, south-central British Columbia, are tabular bodies up to 200 m long and 6 m wide which…
(more)
▼ Magnetite-apatite lodes, in the Upper Triassic Iron Mask batholith, south-central British Columbia, are tabular bodies up to 200 m long and 6 m wide which consist of 50 to 90 percent magnetite, 10 to 40 percent apatite and variable amounts of amphibole. Lodes occur in close spatial association with alkaline "porphyry-type" copper mineralization, disseminated-magnetite rich diorite and late syenitic units. To aid in determining the genesis of these lodes 84 samples of lode magnetite and disseminated magnetite from dioritic, syenitic and picritic units of the batholith were analyzed by atomic absorption spectrophotometry for: chromium, cobalt, copper, lead, magnesium, manganese, nickel, titanium, vanadium and zinc, fourteen samples were also analyzed for major and minor oxides by electron microprobe. Minor element data indicates a magmatic-injection origin for the lodes; magnetite being concentrated by immiscibility between magnetite-apatite and an alkalic magma.
With the exception of copper and lead, minor element variations in magnetite due to sampling error and analytical variations are insignificant relative to between and within rock unit variations, as revealed by analysis of variance.
Disseminated magnetite from picrite has high and distinctive contents of chromium, magnesium, nickel and zinc relative to disseminated magnetite in syenite and diorite. Minor element concentrations in disseminated magnetite from syenite and diorite are very similar statistically. Lode magnetite, compared to disseminated magnetite from diorite and syenite, is markedly lower in chromium and less so in titanium and vanadium, however other elements occur in statistically similar concentrations.. Minor element concentrations in magnetite from Iron Mask lodes are statistically the same as those in magnetite from magmatic iron deposits in Kiruna, Sweden and Missouri, U.S.A. Magnetite from hydrothermal vein and metasomatic deposits has lower chromium and nickel contents than Iron Mask lode magnetite. Geochemical evidence presented here suggests that Iron Mask lodes are: 1) genetically related to the Cherry Creek syenite and Pothook diorite units of the Iron Mask batholith, and 2) magmatically emplaced based on analogy to Kiruna and Missouri ores.
Experimental documentation of immiscibility between a magnetite-apatite melt and a silicate magma allows a model to be developed that describes the genesis of the Iron Mask batholith. and associated magnetite-apatite lodes. Crystal settling of plagioclase and pyroxene from the Iron Mask magma fromed the early. Pothook diorite and enriched the residual magma in iron and alkaliis. The magma also differentiated toward the experimentally determined magnetite-apatite eutectic composition-(i.e. 20 to 35 weight percent apatite in total magnetite plus apatite). When the eutectic was reached after crystallization of Pothgok diorite, (just before the Cherry Creek syenite started to crystallize) magnetite and apatite separated together from the silicate magma as an immiscible melt, and settled to the base…
Subjects/Keywords: Magnetite – British Columbia
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Cann, R. M. (1979). Geochemistry of magnetite and the genesis of magnetite-apatite lodes in the iron mask batholith, British Columbia. (Masters Thesis). University of British Columbia. Retrieved from http://hdl.handle.net/2429/21560
Chicago Manual of Style (16th Edition):
Cann, Robert Michael. “Geochemistry of magnetite and the genesis of magnetite-apatite lodes in the iron mask batholith, British Columbia.” 1979. Masters Thesis, University of British Columbia. Accessed January 23, 2021.
http://hdl.handle.net/2429/21560.
MLA Handbook (7th Edition):
Cann, Robert Michael. “Geochemistry of magnetite and the genesis of magnetite-apatite lodes in the iron mask batholith, British Columbia.” 1979. Web. 23 Jan 2021.
Vancouver:
Cann RM. Geochemistry of magnetite and the genesis of magnetite-apatite lodes in the iron mask batholith, British Columbia. [Internet] [Masters thesis]. University of British Columbia; 1979. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/2429/21560.
Council of Science Editors:
Cann RM. Geochemistry of magnetite and the genesis of magnetite-apatite lodes in the iron mask batholith, British Columbia. [Masters Thesis]. University of British Columbia; 1979. Available from: http://hdl.handle.net/2429/21560

Delft University of Technology
25.
Zhang, Haochen (author).
Effect of magnetite nanoparticles on methanogenic degradation of <i>p</i>-cresol in anaerobic membrane bioreactor.
Degree: 2020, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:24c92322-144f-4676-a620-41844646d93a
► Anaerobic membrane bioreactor (AnMBR) is a promising technology to treat phenolic wastewater. Conductive materials such as magnetite and granular activated carbon have been reported to…
(more)
▼ Anaerobic membrane bioreactor (AnMBR) is a promising technology to treat phenolic wastewater. Conductive materials such as magnetite and granular activated carbon have been reported to be capable of improving anaerobic digestion by facilitating direct interspecies electron transfer (DIET). This research first investigated the effect of magnetite on the treatment of synthetic <i>p</i>-cresol (a relative abundant compound in phenolic wastewater) wastewater in a lab-scale AnMBR. Magnetite increased the reactor stability, permitted higher <i>p</i>-cresol loading rate in the AnMBR, and reduced the fouling potential of supernatant of the mixed liquor. Activities of dehydrogenase and F420 were significantly increased and this may have contributed to the enhanced reactor performance. Magnetite supplement did not have a substantial influence on the soluble microbial products (SMPs) concentration compared to the stage without magnetite whereas extracellular polymeric substances (EPS) concentration significantly increased with magnetite supplement. Reduced fouling potential of the supernatant of the mixed liquor may be attributed to the decrease of protein content in SMPs in the stage with magnetite supplement. Second, the effect of magnetite on the methanogenic degradation pathway of <i>p</i>-cresol was studied, in which the rate limiting step was the conversion of intermediate compound benzoate. Moreover, magnetite increased the maximum substrate degradation rate of all the chosen intermediates as well as the accumulative methane production. Batch test using inoculum adapted to magnetite failed to yield faster substrate degradation rate in comparison with the batch test using non-adapted inoculum. This may be ascribed to the loss of biomass when magnetite was removed from the collected sludge because magnetite and DIET-based microorganisms were closely associated and shaking manually was not sufficient for microorganisms to detach from the magnetite. Since magnetite nanoparticles enhanced reactor performance and stability as well as reduced fouling potential of the supernatant of the mixed liquor, potential commercial application of magnetite nanoparticles in AnMBR may permit shorter hydraulic retention time (HRT) and higher flux, which can lead to higher treatment capacity and lower operational costs. Further research should investigate the effect of potential magnetite corrosion on the reactor performance, the effect of magnetite on fouling potential of the mixed liquor, and likely loss of biomass in case of magnetite removal and methods to remove magnetite with as little loss of biomass as possible.
Civil Engineering
Advisors/Committee Members: Liu, Ziwei (mentor), Lee, Joonyeob (graduation committee), van Lier, J.B. (graduation committee), Spanjers, H.L.F.M. (mentor), Weissbrodt, D.G. (mentor), Delft University of Technology (degree granting institution).
Subjects/Keywords: AnMBR; magnetite nanoparticles; DIET; p-cresol
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Zhang, H. (. (2020). Effect of magnetite nanoparticles on methanogenic degradation of <i>p</i>-cresol in anaerobic membrane bioreactor. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:24c92322-144f-4676-a620-41844646d93a
Chicago Manual of Style (16th Edition):
Zhang, Haochen (author). “Effect of magnetite nanoparticles on methanogenic degradation of <i>p</i>-cresol in anaerobic membrane bioreactor.” 2020. Masters Thesis, Delft University of Technology. Accessed January 23, 2021.
http://resolver.tudelft.nl/uuid:24c92322-144f-4676-a620-41844646d93a.
MLA Handbook (7th Edition):
Zhang, Haochen (author). “Effect of magnetite nanoparticles on methanogenic degradation of <i>p</i>-cresol in anaerobic membrane bioreactor.” 2020. Web. 23 Jan 2021.
Vancouver:
Zhang H(. Effect of magnetite nanoparticles on methanogenic degradation of <i>p</i>-cresol in anaerobic membrane bioreactor. [Internet] [Masters thesis]. Delft University of Technology; 2020. [cited 2021 Jan 23].
Available from: http://resolver.tudelft.nl/uuid:24c92322-144f-4676-a620-41844646d93a.
Council of Science Editors:
Zhang H(. Effect of magnetite nanoparticles on methanogenic degradation of <i>p</i>-cresol in anaerobic membrane bioreactor. [Masters Thesis]. Delft University of Technology; 2020. Available from: http://resolver.tudelft.nl/uuid:24c92322-144f-4676-a620-41844646d93a

University of British Columbia
26.
Sangster, Donald Frederick.
The contact metasomatic magnetite deposits of southwestern British Columbia.
Degree: PhD, Geological Sciences, 1964, University of British Columbia
URL: http://hdl.handle.net/2429/38943
► Ore zones, skarn, host rocks, and associated intrusions of 12 magnetite deposits were studied in both field and laboratory to determine their mineralogical and geochemical…
(more)
▼ Ore zones, skarn, host rocks, and associated intrusions of 12 magnetite deposits were studied in both field and laboratory to determine their mineralogical and geochemical characteristics, origin of the iron, and factors controlling emplacement of iron-bearing minerals. This study seeks a better understanding of the origin and mode of occurrence of contact metasomatic magnetite deposits which in turn may provide better guides to their exploration and evaluation.
Local folds and faults are important factors in the explacement of magnetite in volcanic rocks and limestone of the Vancouver group. Adjacent stocks are of intermediate composition. Post-ore leucodiorite dykes are common in many orebodies .
The author proposes that the process by which skarn is formed be called skarnification i.e. the replacement by, conversion into, or introduction of skarn. The term would include all processes by which skarn may be formed such as contact metamorphism, contact metasomatism, or regional metamorphism. Skarn in the coastal British Columbia region is composed mainly of garnet (andradite-grossularite), pyroxene (diopside-hedenbergite), epidote, and magnetite. Conformity to Gibbs Phase Rule and the non-appearance of incompatible phases is strong evidence that equilibrium was attained during skarnification. Magnetite is the major metallic mineral, but chalcopyrite, pyrite, pyrrhotite, and arsenopyrite are locally abundant.
The temperature of intrusion is estimated to be in the range 800-900°C and stability relations of coexisting minerals indicate a temperature of 700-
550°C daring skarnification. The pyrite-pyrrhotite geothermometer applied to eight specimens shows that ore deposition, took place within the temperature range 400-550°C. The composition of arsenopyrite coexisting with pyrite and pyrrbotite in one orebody indicates a confining pressure of 2600± 1,000 bars during ore formation.
The immediate source of iron in these deposits is believed to be nearby intrusions. The ultimate source, however, is very probably underlying volcanic rocks which have been assimilated, in part, by an advancing pluton. Iron is considered to have been derived from plutons adjacent to the orebodies and to have been carried to the sites of deposition as aqueous supercritical solutions of iron chloride. Magnetite was precipitated from the ore-forming fluid by an increase in pH brought about by reaction with limestone.
Changes in the chemical and physical nature of the ore-forming fluid during ore deposition are discussed in terms of temperature, density, pH, partial pressures of oxygen and sulphur, and composition. Hydrothermal processes operative in formation of the deposits were solvate opposition, metasomatism, and cavity filling
Subjects/Keywords: Magnetite – British Columbia.
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APA (6th Edition):
Sangster, D. F. (1964). The contact metasomatic magnetite deposits of southwestern British Columbia. (Doctoral Dissertation). University of British Columbia. Retrieved from http://hdl.handle.net/2429/38943
Chicago Manual of Style (16th Edition):
Sangster, Donald Frederick. “The contact metasomatic magnetite deposits of southwestern British Columbia.” 1964. Doctoral Dissertation, University of British Columbia. Accessed January 23, 2021.
http://hdl.handle.net/2429/38943.
MLA Handbook (7th Edition):
Sangster, Donald Frederick. “The contact metasomatic magnetite deposits of southwestern British Columbia.” 1964. Web. 23 Jan 2021.
Vancouver:
Sangster DF. The contact metasomatic magnetite deposits of southwestern British Columbia. [Internet] [Doctoral dissertation]. University of British Columbia; 1964. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/2429/38943.
Council of Science Editors:
Sangster DF. The contact metasomatic magnetite deposits of southwestern British Columbia. [Doctoral Dissertation]. University of British Columbia; 1964. Available from: http://hdl.handle.net/2429/38943

University of New Orleans
27.
Pradhan, Anindya.
Synthesis and Characterization of Novel Nanoparticles for Use as Photocatalytic Probes and Radiotracers.
Degree: PhD, Chemistry, 2008, University of New Orleans
URL: https://scholarworks.uno.edu/td/689
► Two novel synthetic routes to formation of gold-magnetite nanoparticles have been designed. Treatment of preformed magnetite nanoparticles with ultrasound in aqueous media with dissolved tetrachloroauric…
(more)
▼ Two novel synthetic routes to formation of gold-
magnetite nanoparticles have been designed. Treatment of preformed
magnetite nanoparticles with ultrasound in aqueous media with dissolved tetrachloroauric acid resulted in the formation of gold-
magnetite nanocomposite materials. The other route involved irradiation of preformed
magnetite nanoparticles by UV light in aqueous media with dissolved tetrachloroauric acid. This method resulted in the formation of gold-
magnetite nanocomposite materials. These materials maintained the morphology of the original
magnetite particles. The morphology of the gold particles could be controlled by adjusting experimental parameters, like addition of small amounts of solvent modifiers such as methanol, diethylene glycol, and oleic acid as well as variation of the concentration of the tetrachloroauric acid solution and time of the reaction. The nanocomposite materials were magnetic and exhibited optical properties similar to gold nanoparticles. Since we were not able to directly synthesize core shell gold
magnetite nanoparticles, TiO2 was used as a bridging material. TiO2 nanoparticles with embedded
magnetite were suspended in aqueous HAuCl4 and irradiated with ultraviolet light to photodeposit gold. The degree of gold coating and the wavelength of absorbance could be controlled by adjusting concentration of HAuCl4. Absorbance maxima were between 540-590 nm. Particles exhibited superparamagnetic properties (blocking temperature ~170 K) whether or not coated with gold. These particles have potential applications as drug delivery agents, magnetic imaging contrast agents, and magnetically separatable photocatalysts with unique surface properties. Another goal was to synthesize and characterize indium doped
magnetite nanoparticles for application as radiotracers for in vivo fate studies. The labeled particles will be useful for determination of pharmacological behavior in biological systems. Indium doped
magnetite particles with varying size and surface chemistry were synthesized with wet chemical techniques. The synthesized nanoparticles were characterized in terms of the size and shape with the help of TEM, the elemental composition by ICP and EDS, the crystal structure by XRD and magnetic properties by SQUID measurements. It was found that the indium loading could be controlled even though the magnetic properties were similar to undoped
magnetite.
Advisors/Committee Members: Tarr, Matthew A., Cole, Richard B., Wiley, John B..
Subjects/Keywords: magnetite nanoparticles; gold magnetite nanocomposites; TiO2 nanoparticles; indium magnetite nanocomposites; radiotracers
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Pradhan, A. (2008). Synthesis and Characterization of Novel Nanoparticles for Use as Photocatalytic Probes and Radiotracers. (Doctoral Dissertation). University of New Orleans. Retrieved from https://scholarworks.uno.edu/td/689
Chicago Manual of Style (16th Edition):
Pradhan, Anindya. “Synthesis and Characterization of Novel Nanoparticles for Use as Photocatalytic Probes and Radiotracers.” 2008. Doctoral Dissertation, University of New Orleans. Accessed January 23, 2021.
https://scholarworks.uno.edu/td/689.
MLA Handbook (7th Edition):
Pradhan, Anindya. “Synthesis and Characterization of Novel Nanoparticles for Use as Photocatalytic Probes and Radiotracers.” 2008. Web. 23 Jan 2021.
Vancouver:
Pradhan A. Synthesis and Characterization of Novel Nanoparticles for Use as Photocatalytic Probes and Radiotracers. [Internet] [Doctoral dissertation]. University of New Orleans; 2008. [cited 2021 Jan 23].
Available from: https://scholarworks.uno.edu/td/689.
Council of Science Editors:
Pradhan A. Synthesis and Characterization of Novel Nanoparticles for Use as Photocatalytic Probes and Radiotracers. [Doctoral Dissertation]. University of New Orleans; 2008. Available from: https://scholarworks.uno.edu/td/689
28.
Santos, Germano Pereira dos.
Estudo eletroquímico de micropartículas individuais e colisões de nanopartículas de magnetita modificadas com azul da Prússia.
Degree: Mestrado, Físico-Química, 2015, University of São Paulo
URL: http://www.teses.usp.br/teses/disponiveis/75/75134/tde-07052015-093611/
;
► De acordo com a literatura recente, a eletroquímica de partículas magnéticas e fenômenos de colisões em superfícies eletródicas resultam em curvas voltamétricas e amperométricas com…
(more)
▼ De acordo com a literatura recente, a eletroquímica de partículas magnéticas e fenômenos de colisões em superfícies eletródicas resultam em curvas voltamétricas e amperométricas com perfis completamente destoados do convencional. Alguns modelos teóricos propõem explicações, no entanto, ainda se observa a necessidade de aquisição de mais dados experimentais. Visando contribuir com esta área, esta Dissertação de Mestrado aborda a manipulação de micropartículas e nanopartículas de magnetita modificadas com azul da Prússia (Fe3O4-PB), bem como o estudo das propriedades eletroquímicas das partículas na presença de um campo magnético externo. Filmes constituídos por micropartículas sobre eletrodos de carbono (grafite) foram obtidos por duas técnicas distintas, drop coating e magneto-deposição. Para ambos os métodos, os filmes apresentaram dois picos nos voltamogramas, um de oxidação (0,12 V) e outro de redução (-0,05 V), que estão associados ao par redox azul da Prússia/branco da Prússia. Para o filme obtido via drop coating, observaram-se correntes de pico mais elevadas. Também, micropartículas de Fe3O4-PB individuais foram isoladas (single particle) com auxílio de um microscópio óptico e analisadas por voltametria, onde se verificou o aparecimento de picos com os mesmos valores de potenciais. Utilizando os dois estados de comutação de campo (0,2 Tesla), ligado e desligado, foi possível controlar a presença e a ausência da partícula no eletrodo. Também, observaram-se diferenças nos valores de densidade de corrente nos cronoamperogramas para cada micropartícula de Fe3O4-PB e que a morfologia da micropartícula interfere significativamente na resposta eletroquímica. Por fim, e agora se tratando da eletroquímica de nanopartículas de Fe3O4-PB sobre um ultramicroeletrodo (UME) de ouro, controlaram-se as colisões das mesmas em diferentes condições experimentais, como na presença e na ausência de um campo magnético externo paralelo a superfície do eletrodo e com intensidades variadas (0,1 e 0,2 Tesla). Na ausência do campo, as nanopartículas que chegaram ao UME colidiram e se acumularam, gerando sinais eletroquímicos do tipo corrente staircase. Na presença de um campo de 0,1 T, observaram-se vários transientes de correntes (spikes) associados às colisões das nanopartículas, eventos esses não observados frequentemente na presença do campo de 0,2 T. Assim, esses resultados abrem a discussão da necessidade de se aperfeiçoarem os modelos que explicam os perfis das curvas voltamétricas e amperométricas para esses sistemas.
According to recent literature, the electrochemistry of magnetic particles and collision phenomena on surfaces result in unconventional voltammetric and amperometric responses. Some theoretical models has been proposed; however, experimental data are required for improve that. In order to contribute to this research area, this Master\'s Dissertation describes the manipulation of microparticles and nanoparticles of magnetite modified with Prussian blue (Fe3O4-PB), as well as the study of electrochemical properties…
Advisors/Committee Members: Crespilho, Frank Nelson.
Subjects/Keywords: Azul da Prússia; Colisões; Collisions; Magnetite microparticles; Magnetite nanoparticles; Micromanipulação; Micromanipulation; Micropartículas de magnetita; Nanopartículas de magnetita; Prussian blue
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Santos, G. P. d. (2015). Estudo eletroquímico de micropartículas individuais e colisões de nanopartículas de magnetita modificadas com azul da Prússia. (Masters Thesis). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/75/75134/tde-07052015-093611/ ;
Chicago Manual of Style (16th Edition):
Santos, Germano Pereira dos. “Estudo eletroquímico de micropartículas individuais e colisões de nanopartículas de magnetita modificadas com azul da Prússia.” 2015. Masters Thesis, University of São Paulo. Accessed January 23, 2021.
http://www.teses.usp.br/teses/disponiveis/75/75134/tde-07052015-093611/ ;.
MLA Handbook (7th Edition):
Santos, Germano Pereira dos. “Estudo eletroquímico de micropartículas individuais e colisões de nanopartículas de magnetita modificadas com azul da Prússia.” 2015. Web. 23 Jan 2021.
Vancouver:
Santos GPd. Estudo eletroquímico de micropartículas individuais e colisões de nanopartículas de magnetita modificadas com azul da Prússia. [Internet] [Masters thesis]. University of São Paulo; 2015. [cited 2021 Jan 23].
Available from: http://www.teses.usp.br/teses/disponiveis/75/75134/tde-07052015-093611/ ;.
Council of Science Editors:
Santos GPd. Estudo eletroquímico de micropartículas individuais e colisões de nanopartículas de magnetita modificadas com azul da Prússia. [Masters Thesis]. University of São Paulo; 2015. Available from: http://www.teses.usp.br/teses/disponiveis/75/75134/tde-07052015-093611/ ;
29.
Khan, Latif Ullah.
Nanomateriais ópticos e magnéticos contendo matrizes de Fe3O4 e SiO2 funcionalizadas com calixareno e complexos de terras raras.
Degree: PhD, Química, 2015, University of São Paulo
URL: http://www.teses.usp.br/teses/disponiveis/46/46136/tde-20072015-151110/
;
► Neste trabalho são investigados o designer e a fabricação nanomateriais magnéticos e luminescentes sofisticados bifuncionais baseados em Fe3O4 e complexos de RE3+. Portanto, novos nanomateriais…
(more)
▼ Neste trabalho são investigados o designer e a fabricação nanomateriais magnéticos e luminescentes sofisticados bifuncionais baseados em Fe3O4 e complexos de RE3+. Portanto, novos nanomateriais [email protected](TTA) e [email protected](ACAC) emissores vermelho e verde superparamagnéticos foram preparados pelo método one-pot. Neste caso, o ligante calixareno quimicamente modicado como surfactantes para estabilizar as nanopartículas de Fe3O4. O ligante calixareno proporciona uma superfície quimicamente modificada e estabilidade coloidal das nanopartículas magnetitas. Consequentemente, as nanopartículas funcionalizadas ([email protected]) foram coordenadas aos íons TR3+ por meio da síntese one-pot, usando ligantes TTA e ACAC como sensibilizadores (efeito antena) para produzir nanofósforos altamente luminescentes. Além do mais, nanocompósitos bifuncionais óptico e magnético [email protected](L), L: TTA, TC, AB e AMB bem como [email protected](AB ou AMB) foram também preparados por meio de um protocolo de múltiplas etapas, utilizando as nanopartículas Fe3O4 como precursoras. Elas foram modificas com camadas de sílica, usando o método Stöber modificado e ligados com complexos de TR3+ para produzir nanocompósitos luminescentes e magnéticos. As técnicas de difração de raios X pelo método do pó (XPD), Espalhamento de Raios-X a baixo ângulo (SAXS), microscopia eletrônica de transmissão (TEM) e microscopia de eletrônica de varredura (MEV) foram utilizas para determinar as estruturas, morfologias, distribuições de tamanhos e monodispersividade dos materiais sintetizados. Estes novos nanomateriais bifuncionais [email protected](TTA), [email protected](ACAC), [email protected](L) e [email protected](AB ou AMB) apresentam propriedades fotônicas e superparamagnéticas muito interessantes. As propriedades magnéticas (ZFC/FC e M-H) obtidas nas temperaturas de 2, 5 e 300 K foram investigadas a fim de obter informações sobre o efeito da cristalinidade na magnetização de saturação e das temperaturas de bloqueios. Também foram estudadas a influência dos íons TR3+ sobre a magnetização dos nanomateriais. Apesar da magnetita atuar como um forte supressor de luminescência, as camadas do ligante calixareno modificado e da sílica sobre as nanopartículas de Fe3O4 compensam esta desvantagem. Do mesmo modo foi considerada a discussão sobre a transferência de energia intramolecular do estado tripleto T1 dos ligantes TTA e ACAC para os níveis excitados dos íons Eu3+ e Tb3+ nos nanomateriais [email protected](TTA) e [email protected](ACAC). As eficiências quânticas de emissão (η) dos compostos [email protected](TTA) e [email protected](L) foram calculadas e discutidas, bem como suas características estruturais baseadas nos níveis de energia e parâmetros de intensidades experimentais dos sistemas contendo o íon Eu3+. Estes novos nanomateriais podem atuar como camadas emissores vermelha e verde para dispositivos moleculares conversores de luz e magnéticos (MLCMDs).
The design and fabrication of sophisticated bifunctional luminescent and magnetic nanomaterials based on…
Advisors/Committee Members: Brito, Hermi Felinto de.
Subjects/Keywords: Calixarene; Calixareno; Complexos de terras raras; Fotoluminescência; Magnetism; Magnetismo; Magnetite; Magnetite; Photoluminescence; Rare earth complexes; Silica; Sílica
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Khan, L. U. (2015). Nanomateriais ópticos e magnéticos contendo matrizes de Fe3O4 e SiO2 funcionalizadas com calixareno e complexos de terras raras. (Doctoral Dissertation). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/46/46136/tde-20072015-151110/ ;
Chicago Manual of Style (16th Edition):
Khan, Latif Ullah. “Nanomateriais ópticos e magnéticos contendo matrizes de Fe3O4 e SiO2 funcionalizadas com calixareno e complexos de terras raras.” 2015. Doctoral Dissertation, University of São Paulo. Accessed January 23, 2021.
http://www.teses.usp.br/teses/disponiveis/46/46136/tde-20072015-151110/ ;.
MLA Handbook (7th Edition):
Khan, Latif Ullah. “Nanomateriais ópticos e magnéticos contendo matrizes de Fe3O4 e SiO2 funcionalizadas com calixareno e complexos de terras raras.” 2015. Web. 23 Jan 2021.
Vancouver:
Khan LU. Nanomateriais ópticos e magnéticos contendo matrizes de Fe3O4 e SiO2 funcionalizadas com calixareno e complexos de terras raras. [Internet] [Doctoral dissertation]. University of São Paulo; 2015. [cited 2021 Jan 23].
Available from: http://www.teses.usp.br/teses/disponiveis/46/46136/tde-20072015-151110/ ;.
Council of Science Editors:
Khan LU. Nanomateriais ópticos e magnéticos contendo matrizes de Fe3O4 e SiO2 funcionalizadas com calixareno e complexos de terras raras. [Doctoral Dissertation]. University of São Paulo; 2015. Available from: http://www.teses.usp.br/teses/disponiveis/46/46136/tde-20072015-151110/ ;

Luleå University of Technology
30.
Koivisto, Evelina.
Utilization Potential of Iron Oxide By-Product from Serpentinite Carbonation.
Degree: 2013, Luleå University of Technology
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-55702
► Mineral carbonation is a naturally occurring process to capture CO2. Research at Åbo Akademi University (ÅAU) has tried to speed up the process in…
(more)
▼ Mineral carbonation is a naturally occurring process to capture CO2. Research at Åbo Akademi University (ÅAU) has tried to speed up the process in order to find a suitable option for future CO2 capture and storage. Mineral carbonation is a safe way to store CO2 since no leakage is expected in a time range of hundred thousand years. This study was focused on the possibilities to use the iron by-product that is extracted from different suitable rocks suggested for use in the in-direct gas solid route developed at ÅAU.Two different serpentinites from Finland and Lithuania were studied. Serpentinite is a magnesium silicate rich rock which is found to be suitable for mineral carbonation. Magnesium will be extracted by allowing serpentinite react with ammonium sulphate. This reaction will make it possible for magnesium to form sulphates which can be dissolved in water. Magnesium hydroxide will precipitate as pH of the solution is increased. The hydroxides are in next step carbonated to magnesium carbonate by carbon monoxide.Iron content in the studied rocks is approximately 10 wt%, which makes it interesting to study the possibility to utilize iron as a by-product from mineral carbonation. The focus of this report was held on the characterization of the chosen rock types as well as finding a suitable iron-rich product which could be used for iron and steel making. Goethite has until today been precipitated in the process route developed at ÅAU. Attempts were therefore done in order to precipitate magnetite instead, which has some benefits with respect to energy needs comparing to other iron oxides. Increased temperature and sufficient time for iron to form magnetite seems to be two important factors to achieve optimum magnetite precipitation.Twelve precipitation experiments were conducted and two of the final iron precipitates were found to contain visible amounts of magnetic material. This indicates that it is possible to precipitate magnetite instead of goethite as the developed process proposes. Precipitations were done at different temperatures, with/without nitrogen gas supply and with ammonia/sodium hydroxide to increase solution pH. Iron will precipitate at pH 8-10 while magnesium will precipitate at higher pH. Taking advantage of this, it becomes possible to extract iron and magnesium separately.Analyses of the presence of ferrous and ferric ions in the starting solutions were done by the ferrozine method. Some differences could be found between the Lithuanian and Finnish serpentinite. The Finnish serpentinite, unlike the Lithuanian serpentinite, resulted in an iron rich initial solution containing both ferrous and ferric ions. This can partly explain why it seemed to be somewhat easier to precipitate magnetite from the Finnish serpentinite than from the Lithuanian serpentinite, which seemed to contain only ferrous ions.Reduction tests by TGA/DTA showed a large weight decrease upon reduction of two different iron precipitates. Hydroxide compounds are expected to form upon precipitation. Decomposition of these…
Subjects/Keywords: Technology; mineral carbonation; serpentinite; magnetite; goethite; iron precipitation; Teknik; mineral carbonation; serpentinite; magnetite; goethite; iron precipitation
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Koivisto, E. (2013). Utilization Potential of Iron Oxide By-Product from Serpentinite Carbonation. (Thesis). Luleå University of Technology. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-55702
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Koivisto, Evelina. “Utilization Potential of Iron Oxide By-Product from Serpentinite Carbonation.” 2013. Thesis, Luleå University of Technology. Accessed January 23, 2021.
http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-55702.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Koivisto, Evelina. “Utilization Potential of Iron Oxide By-Product from Serpentinite Carbonation.” 2013. Web. 23 Jan 2021.
Vancouver:
Koivisto E. Utilization Potential of Iron Oxide By-Product from Serpentinite Carbonation. [Internet] [Thesis]. Luleå University of Technology; 2013. [cited 2021 Jan 23].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-55702.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Koivisto E. Utilization Potential of Iron Oxide By-Product from Serpentinite Carbonation. [Thesis]. Luleå University of Technology; 2013. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-55702
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
◁ [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] ▶
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