Electrochemical Studies on the Hydrophilic Mechanism of TiO2 Thin Films under UV Irradiation
- Received Date: 2003-04-11
- Film of TiO2，Cyclic voltammetry，UV light，Hydrophilicity /
Abstract: The nanometer films of TiO2 were prepared by sol-gel method on ITO（Indium-tin oxide，SnO2：In） substrate. The TiO2 film was the anatase phase with a particle size of 100 nm from the measurements of X-ray diffraction and AFM（Atomic-Force-Microscope）. Electrochemical characteristics of ITO/ TiO2 electrode under UV（ultraviolet）irradiation were investigated using the method of cyclic voltammetry. A new oxidative peak was observed at 0.035 V when the TiO2 electrode was irradiated by 253.7 nm UV light for a certain time. The peak current increased with the irradiation time. It was assumed that the new oxidative peak resulted from Ti3+，which was formed during the UV illumination. The changes of hydrophilicity of the TiO2 thin film on ITO under UV light were also observed. It was assumed that the changes of hydrophilicity of the films may be related with the formation of Ti3+ on the surface when the film was irradiated by UV light.
|Citation:||Wo Songtao, Cui Xiaoli, Zhang Qun, Yang Xiliang, Zhang Zhuangjian. Electrochemical Studies on the Hydrophilic Mechanism of TiO2 Thin Films under UV Irradiation[J]. Chinese Journal of Chemical Physics , 2004, 17(2): 211-214. doi: 10.1088/1674-0068/17/2/211-214|