Photoinduced surface reactions on TiO{sub 2} and SrTiO{sub 3} films: Photocatalytic oxidation and photoinduced hydrophilicity
In the present study, the authors have evaluated photocatalytic activities and photoinduced wettabilities for TiO{sub 2} and SrTiO{sub 3} films. Although both types of films had almost the same photocatalytic oxidation activity, photoinduced wettabilities of these films showed different phenomena. The photoinduced hydrophilicity peculiar to TiO{sub 2} is not caused by the photocatalytic oxidation of organic compounds adsorbed on the surface. The highly hydrophilic surface of TiO{sub 2} is ascribed to photogenerated Ti{sup 3+} defect sites that are favorable for dissociative water absorption. The yield of this photoinduced hydrophilic reaction is not clear at the present time. It is noted that this reaction involves a surface structural change, which should not require a high quantum efficiency as compared to conventional photocatalytic oxidation.
- Research Organization:
- Univ. of Tokyo (JP)
- Sponsoring Organization:
- Japanese Ministry of Education, Science, Sports and Culture
- OSTI ID:
- 20014842
- Journal Information:
- Chemistry of Materials, Vol. 12, Issue 1; Other Information: PBD: Jan 2000; ISSN 0897-4756
- Country of Publication:
- United States
- Language:
- English
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