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Electrochemical and Morphological Analysis of Poly(3,4-alkylenedioxythiophene)-Modified TiO2 Nanorod Electrodes

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In this study, poly(3,4-propylenedioxythiophene)/TiO2 nanorod modified with 3-aminopropyltriethoxysilane (APTES)/FTO electrodes and for comparision poly(3,4-alkylenedioxythiophene)/FTO (fluoride tin oxide) were produced by using an electrochemical deposition method. The surface roughness of these electrodes were characterized by AFM measurement and morphological effect on electrocatalytic ability for triiodide (I- 3) reduction were investigated. We found that catalytic activity become better with increasing roughness of the electrode surfaces. Electrochemical impedance spectroscopy (EIS) measurements within a symmetrical polymer/I- 3/I- 3/polymer cell were carried out in order to understand impedance properties of these electrodes. Cyclic voltammetry and EIS results of electrodes indicated that the poly(3,4-propylenedioxythiophene)/modified TiO2 nanorod/FTO electrode shows better catalytic activity towards I- 3/- 3 redox reaction than that of poly(3,4-alkylenedioxythiophene)/FTO electrodes. In addition, we showed that the modification of TiO2 surfaces with 3-aminopropyltriethoxysilane provides to improve the contact between TiO2 and poly(3,4-propylenedioxythiophene) thus increasing in electrocatalytic ability for I- 3;
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Keywords: Nanoscale Electropolymerization; Poly(3,4-alkylenedioxythiophene); Surface Modification; Surface Roughness; TiO2 Nanorod

Document Type: Research Article

Affiliations: Department of Chemistry, Istanbul Technical University, Maslak, 34469 Istanbul, Turkey

Publication date: August 1, 2017

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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