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You searched for +publisher:"Addis Ababa University" +contributor:("Dr. Shimelis Admassie"). Showing records 1 – 3 of 3 total matches.

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Addis Ababa University

1. Alemayehu, Yifru. Poly(3,4 –ethylenedioxythiophene ) (PEDOT) Modified Glassy Carbon Electrode for the Voltammetric Determination of Diazinon .

Degree: 2012, Addis Ababa University

A glassy carbon electrode (GCE) is modified with PEDOT and its application for differential pulse voltammetry (DPV) detection of diazinon ,DZN ( organophosphate pesticide) is observed. The PEDOT shows a strong affinity toward diazinon molecule which provides sensitivity for the modified GCE. Instrumental and Chemical parameters influencing the voltammetric response are optimized for diazinon determination . Under Optimum experimental condition the peak current is linear to diazinon concentration over the range of 20μM to 80μM with a correlation coefficient of 0.99866. The limit of detection based on three times the standard deviation of the blank (3Sb) was 4.245x 10-6M. The recovery values for sample tap-water solution containing low ,middle and high concentration of diazinon (50μM, 60 μM & 80 μM) were 95.24%,88.4% & 81.29%; respectively. Thus this modified electrode is considerably applied for the determination of DZN in tap-water sample. Advisors/Committee Members: Dr. Shimelis Admassie (advisor).

Subjects/Keywords: GCE; PEDOT; differential pulse voltammetry; Diazinon

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APA (6th Edition):

Alemayehu, Y. (2012). Poly(3,4 –ethylenedioxythiophene ) (PEDOT) Modified Glassy Carbon Electrode for the Voltammetric Determination of Diazinon . (Thesis). Addis Ababa University. Retrieved from http://etd.aau.edu.et/dspace/handle/123456789/479

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):

Alemayehu, Yifru. “Poly(3,4 –ethylenedioxythiophene ) (PEDOT) Modified Glassy Carbon Electrode for the Voltammetric Determination of Diazinon .” 2012. Thesis, Addis Ababa University. Accessed October 23, 2019. http://etd.aau.edu.et/dspace/handle/123456789/479.

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

MLA Handbook (7th Edition):

Alemayehu, Yifru. “Poly(3,4 –ethylenedioxythiophene ) (PEDOT) Modified Glassy Carbon Electrode for the Voltammetric Determination of Diazinon .” 2012. Web. 23 Oct 2019.

Vancouver:

Alemayehu Y. Poly(3,4 –ethylenedioxythiophene ) (PEDOT) Modified Glassy Carbon Electrode for the Voltammetric Determination of Diazinon . [Internet] [Thesis]. Addis Ababa University; 2012. [cited 2019 Oct 23]. Available from: http://etd.aau.edu.et/dspace/handle/123456789/479.

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

Council of Science Editors:

Alemayehu Y. Poly(3,4 –ethylenedioxythiophene ) (PEDOT) Modified Glassy Carbon Electrode for the Voltammetric Determination of Diazinon . [Thesis]. Addis Ababa University; 2012. Available from: http://etd.aau.edu.et/dspace/handle/123456789/479

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


Addis Ababa University

2. Kibret, Melaku. Electrocatalytic Reduction of Molecular Oxygen at Poly (1, 8-Diaminonaphthalene) and Polypyrrole Multi-Wall Carbon Nanotubes Modified Glassy Carbon Electrodes .

Degree: 2012, Addis Ababa University

The electrochemical growth current of poly (1, 8- Diaminonaphthalene) and polypyrrole and their redox currents were enhanced several-fold when deposited on carbon nanotubes modified glassy carbon electrode compared the bare glassy carbon electrode surface. Cyclic voltammetry were used to characterize the modified film on the electrode surface. The electrocatalytic ability of the modified electrodes for the reduction of molecular oxygen was investigated using cyclic voltammetry and rotating disk techniques in 0.2 M NaSO 4 (pH=1) solution. GC/MWCNT/p-DAN modified electrode showed good electrocatalytic activity for oxygen reduction reaction. The oxygen reduction behavior of GC/MWCNT/p-DAN electrode at different deposition cycle (5 and 8) of p-DAN was investigated using rotating disk electrodes and compared with each other. The RDE data indicated that the reduction of oxygen on both electrodes of GC/MWCNT/p-DAN proceeds by four-electron pathway in 0.2 M NaSO4 (pH=1) solution. From Koutecky-Levich analysis, the kinetics parameters (total number of exchanged electrons, limiting current, rate constant, exchange current, Tafel slope and transfer coefficient) were determined. Advisors/Committee Members: Dr. Shimelis Admassie (advisor).

Subjects/Keywords: Electrocatalysis, Electropolymerization, Multi-walled carbon nanotubes; polypyrrole; 1, 8- Diaminonaphthalene; Oxygen Reduction, poly ()

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

APA (6th Edition):

Kibret, M. (2012). Electrocatalytic Reduction of Molecular Oxygen at Poly (1, 8-Diaminonaphthalene) and Polypyrrole Multi-Wall Carbon Nanotubes Modified Glassy Carbon Electrodes . (Thesis). Addis Ababa University. Retrieved from http://etd.aau.edu.et/dspace/handle/123456789/504

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):

Kibret, Melaku. “Electrocatalytic Reduction of Molecular Oxygen at Poly (1, 8-Diaminonaphthalene) and Polypyrrole Multi-Wall Carbon Nanotubes Modified Glassy Carbon Electrodes .” 2012. Thesis, Addis Ababa University. Accessed October 23, 2019. http://etd.aau.edu.et/dspace/handle/123456789/504.

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

MLA Handbook (7th Edition):

Kibret, Melaku. “Electrocatalytic Reduction of Molecular Oxygen at Poly (1, 8-Diaminonaphthalene) and Polypyrrole Multi-Wall Carbon Nanotubes Modified Glassy Carbon Electrodes .” 2012. Web. 23 Oct 2019.

Vancouver:

Kibret M. Electrocatalytic Reduction of Molecular Oxygen at Poly (1, 8-Diaminonaphthalene) and Polypyrrole Multi-Wall Carbon Nanotubes Modified Glassy Carbon Electrodes . [Internet] [Thesis]. Addis Ababa University; 2012. [cited 2019 Oct 23]. Available from: http://etd.aau.edu.et/dspace/handle/123456789/504.

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

Council of Science Editors:

Kibret M. Electrocatalytic Reduction of Molecular Oxygen at Poly (1, 8-Diaminonaphthalene) and Polypyrrole Multi-Wall Carbon Nanotubes Modified Glassy Carbon Electrodes . [Thesis]. Addis Ababa University; 2012. Available from: http://etd.aau.edu.et/dspace/handle/123456789/504

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


Addis Ababa University

3. Bedasa, Abdisa. ELECTROSYNTHESIS AND CHARACTERIZATIONS OF SOME POLY(DYES) .

Degree: 2007, Addis Ababa University

The electrochemical polymerization and characterization studies were made for monomers: malachite green, neutral red, aniline, and methylene blue using GC working electrode with respect to Ag wire reference electrode. The electrochemical properties of their corresponding polymers were also studied in monomer free solution using cyclic voltammetry. Copolymer films were electropolymerized from malachite green and neutral red, and aniline and neutral red where neutral red plays a role of electrocatalysis. In addition, PB film was also deposited potentiostatically from 2mM K3[Fe(CN)6] and 2mM FeCl3 solution on to GC/Polymer modified electrode at a potential of +0.4 V for 60 s. GC/Polymer/PB modified electrodes were also characterized using cyclic voltammetry where the presence of PB film together with GC/Polymer modified electrode enhances the peak currents of the GC/Polymer modified electrode indicating PB film also plays a role of electrocatalysis. Advisors/Committee Members: Dr. Shimelis Admassie (advisor).

Subjects/Keywords: Electrosynthesis; poly(neutral red); poly(malachite green); poly(aniline); poly(methylene blue); Prussian blue

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

APA (6th Edition):

Bedasa, A. (2007). ELECTROSYNTHESIS AND CHARACTERIZATIONS OF SOME POLY(DYES) . (Thesis). Addis Ababa University. Retrieved from http://etd.aau.edu.et/dspace/handle/123456789/676

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):

Bedasa, Abdisa. “ELECTROSYNTHESIS AND CHARACTERIZATIONS OF SOME POLY(DYES) .” 2007. Thesis, Addis Ababa University. Accessed October 23, 2019. http://etd.aau.edu.et/dspace/handle/123456789/676.

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

MLA Handbook (7th Edition):

Bedasa, Abdisa. “ELECTROSYNTHESIS AND CHARACTERIZATIONS OF SOME POLY(DYES) .” 2007. Web. 23 Oct 2019.

Vancouver:

Bedasa A. ELECTROSYNTHESIS AND CHARACTERIZATIONS OF SOME POLY(DYES) . [Internet] [Thesis]. Addis Ababa University; 2007. [cited 2019 Oct 23]. Available from: http://etd.aau.edu.et/dspace/handle/123456789/676.

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

Council of Science Editors:

Bedasa A. ELECTROSYNTHESIS AND CHARACTERIZATIONS OF SOME POLY(DYES) . [Thesis]. Addis Ababa University; 2007. Available from: http://etd.aau.edu.et/dspace/handle/123456789/676

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

.