Journal of the Ceramic Society of Japan
Online ISSN : 1348-6535
Print ISSN : 1882-0743
ISSN-L : 1348-6535
Regular Issue: Papers
Self-cleaning efficiency of titanium dioxide surface under simultaneous UV irradiation of various intensities and water flow
Shunsuke NISHIMOTOSana TOMOISHIYoshikazu KAMESHIMAEiji FUJIIMichihiro MIYAKE
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2014 Volume 122 Issue 1426 Pages 513-516

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Abstract

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.

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© 2014 The Ceramic Society of Japan
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