Electrically enhanced photodegradation of an azodye(Acid Orange II) using a Pt/TiO2 film electrode irradiating with an UV lamp

Article type: Research Article

Authors: Su, Jing | Quan, Xie | Chen, Shuo | Zhao, Ya-zhi | Chen, Guo-hua

Affiliations: School of Environmental Science and Technology, Dalian University of Technology, Dalian 116012, China | Department of Chemical Engineering, Hong Kong University of Science and Technology, Hong Kong SAR

Abstract: A photoelectrochemical process in the degradation of anazodye (Acid Orange II) on a Pt/TiO2 film electrode was investigated. By using the glass device and the voltage stabilized source of direct current, decolorization ratios higher than 78% were observed during a period of 5h. Comparing this value with the sum of the decolorization ratios obtained by a sole application of electrochemical (lower than 3%) and photochemical (about 23%) procedures, a significant synergic effect between both processes was observed. The effects of adscititious voltage and pH value on the decolorization ratios were obvious while the effect of the amount of aeration was minor.

Keywords: photoelectrochemical process, Pt/TiO2 film electrode, synergic effect

Journal: Journal of Environmental Sciences, vol. 15, no. 1, pp. 60-64, 2003