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International Journal of Photoenergy
Volume 2012 (2012), Article ID 576089, 6 pages
http://dx.doi.org/10.1155/2012/576089
Research Article

Photoelectrocatalytic Degradation of Sodium Oxalate by TiO2/Ti Thin Film Electrode

1Center of General Education, National Taitung College, 889 Jhengci N. Rd., Taitung 95045, Taiwan
2Department of Environmental Engineering, National Chung Hsing University, 250 Kuo-Kung Road, Taichung 40227, Taiwan

Received 19 October 2011; Revised 18 December 2011; Accepted 19 December 2011

Academic Editor: Jiaguo Yu

Copyright © 2012 Chen-Yu Chang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The photocatalytically active TiO2 thin film was deposited on the titanium substrate plate by chemical vapor deposition (CVD) method, and the photoelectrocatalytic degradation of sodium oxalate was investigated by TiO2 thin film reactor prepared in this study with additional electric potential at 365 nm irradiation. The batch system was chosen in this experiment, and the controlled parameters were pH, different supporting electrolytes, applied additional potential, and different electrolyte solutions that were examined and discussed. The experimental results revealed that the additional applied potential in photocatalytic reaction could prohibit recombination of electron/hole pairs, but the photoelectrocatalytic effect was decreased when the applied electric potential was over 0.25 V. Among the electrolyte solutions added, sodium sulfate improved the photoelectrocatalytic effect most significantly. At last, the better photoelectrocatalytic degradation of sodium oxalate occurred at pH 3 when comparing the pH influence.