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Citation: CHEN Xun, GENG Qiang, LIU Jun-Feng, DING Zheng-Xin, DAI Wen-Xin, WANG Xu-Xu. Influence of Conducting Substrates on the Photoinduced Hydrophilicity of TiO₂ Films[J]. Acta Physico-Chimica Sinica, ;2009, 25(11): 2237-2242. doi: 10.3866/PKU.WHXB20091036 shu

Influence of Conducting Substrates on the Photoinduced Hydrophilicity of TiO₂ Films

1.
State Key Laboratory Breeding Base of Photocatalysis, Institute of Photocatalysis, Fuzhou University, Fuzhou 350002, P. R. China

Received Date: 1 June 2009
Available Online: 9 September 2009

TiO2 films on Al alloy (Al), anodic aluminumoxide (AAO/Al, formed at the surface of Al alloy), indium-tin oxide glass (ITO/glass) and glass were prepared by a dip coating method. The measurement of water drop contact angle under UV irradiation shows that TiO2 films on the conducting Al substrate have a higher activity for photoinduced hydrophilicity than that on the non-conducting AAO/Al substrate. Alternatively, TiO2 films on the conducting ITO/glass substrate have a lower activity for photoinduced hydrophilicity compared to TiO2 films on the non-conducting substrate glass. These observations are due to electron transfer between TiO2 and substrates. Al acts as an electron donor and donates electrons to TiO2, which results in an increase in the photoinduced hydrophilicity of TiO2 film. ITO accepts the photogenerated electrons, which results in a decrease in the photoinduced hydrophilicity of TiO2 films.
- Photoinduced hydrophilicity,
- Electron transfer,
- TiO2 film,
- Conducting substrate
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沈阳化工大学材料科学与工程学院沈阳 110142

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Influence of Conducting Substrates on the Photoinduced Hydrophilicity of TiO2 Films

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通讯作者: 陈斌, bchen63@163.com

Influence of Conducting Substrates on the Photoinduced Hydrophilicity of TiO₂ Films