Photoinduced hydrophilicity of TiO2 film as the effect of H 2O2 addition

Y. H. Tseng*, C. S. Kuo, C. H. Huang, T. Hirakawa, N. Negishi, Hsun-Ling Bai

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

TiO2 thin film photocatalysts coated onto glass plates were prepared by thermal decomposition of tetraisopropyl orthotitanate with a dip-coating process. In this Letter, the mechanism for photoinduced hydrophilicity of TiO2 film is clarified by adding the extra H 2O2 on TiO2 surface. Results show that the photoinduced hydrophilicity of TiO2 film is inhibited with the presence of H2O2. The amount of Ti-OH bonds on the surface oppositely increased by the addition of H2O2. It indicates the photoinduced hydrophilicity of TiO2 results from surface oxygen vacancy, not Ti-OH bonds.

Original languageEnglish
Pages (from-to)81-84
Number of pages4
JournalMicro and Nano Letters
Volume5
Issue number2
DOIs
StatePublished - 8 Sep 2010

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