Citation: Jiang Lin CAO, Wen Hua LENG, Jian Qing ZHANG, Chu Nan CAO. Photostability Study of Nanoporous TiO₂ Film Electrodes in Basic Solutions[J]. Chinese Chemical Letters, ;2005, 16(6): 827-830. shu

Photostability Study of Nanoporous TiO₂ Film Electrodes in Basic Solutions

Department of Chemistry, Yuquan Campus, Zhejiang University, Hangzhou 310027

Received Date: 24 May 2004

Fund Project: Financial support from the foundation of NNSFC (Grant No. 20107006 and 20373062).

The nanoporous TiO₂ film electrodes have been prepared by a sol-gel deposition process.The photostability of the electrodes in basic solutions has been studied. The results show that the photostability of the electrodes decreases rapidly in strong basic solutions with or without methanol. The reaction of holes to O_ad^2- produces active O_ad^- atoms and the products O_ad^- atoms oxidize Ti³⁺ to Ti⁴⁺ on TiO₂ film surface and subsurface. This results in the TiO₂ film electrodes unstable in basic solutions both without methanol and with too low concentration.
- Photostability,
- TiO₂ film,
- photoelectrochemistry
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