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Home  >  Journal list  >  Journal of the Ceramic Society of Japan  >  Vol.122  No.1426 (June) (2014)  >  pp.513-516

Journal of the Ceramic Society of Japan
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Self-cleaning efficiency of titanium dioxide surface under simultaneous UV irradiation of various intensities and water flow

Shunsuke NISHIMOTO1), Sana TOMOISHI1), Yoshikazu KAMESHIMA1), Eiji FUJII2), Michihiro MIYAKE1)
1) Department of Material and Energy Science, Graduate School of Environmental and Life Science, Okayama University 2) Industrial Technology Center of Okayama Prefecture

We investigated the self-cleaning efficiencies of titanium dioxide (TiO2) surface under ultraviolet (UV) irradiation in combination with a water flow (UV/water) condition using oleic acid as the model surface contaminant. UV light intensities were varied from a typical indoor intensity level to a representative outdoor intensity level in Japan. The combined UV/water treatment exhibited a much higher self-cleaning efficiency than either condition alone. This suggests that the self-cleaning effect occurred at nanometer-sized photo-induced superhydrophilic domains of the TiO2 film surface located at the interface of the TiO2 surface, oleic acid, and air.

Titanium dioxide, Photocatalyst, Superhydrophilicity, Self-cleaning

Received: January 30, 2014
Accepted: March 31, 2014 , Published online: June 01, 2014
Copyright © 2014 The Ceramic Society of Japan



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