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Development of Nanostructured Titanium Dioxide Electrodes for Energy Storage and Environmental Applications

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Title: Development of Nanostructured Titanium Dioxide Electrodes for Energy Storage and Environmental Applications
Author: van der Zalm, Joshua
Department: Department of Chemistry
Program: Chemistry
Advisor: Chen, Aicheng
Abstract: Nanoporous TiO2 electrodes were fabricated by a three-step anodization process that yielded a uniformly structured and reproducible morphology, which increased the available surface area for electrochemical and photoelectrochemical activities. Enhancement of the electrochemical and photoelectrochemical performance of the prepared TiO2 electrodes was achieved via a reduction treatment at -5mA cm-2 for 10min. The capacitance of the electrode displayed a 25-fold increase following the reduction with an average capacitance of 3.20mF cm-2, which was determined through a variety of electrochemical techniques. The TiO2 electrodes exhibited 83% capacitance retention after 5000 charge/discharge cycles. The photoelectrochemical investigation revealed a six-fold increase in the photocurrent of the reduced over the unreduced electrodes. Removal of the pollutant atrazine was achieved by a photoelectrocatalytic process using a UV light source and an applied potential of 1.5V at the reduced TiO2 electrode. LC-MS and UV-Vis monitoring of the solution revealed that 96.1% of the target pollutant was removed.
URI: http://hdl.handle.net/10214/17634
Date: 2019-12-09
Rights: Attribution-NonCommercial-NoDerivatives 4.0 International
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Attribution-NonCommercial-NoDerivatives 4.0 International Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivatives 4.0 International