Self-cleaning efficiency of titanium dioxide surface under simultaneous UV irradiation of various intensities and water flow

Shunsuke Nishimoto, Sana Tomoishi, Yoshikazu Kameshima, Eiji Fujii, Michihiro Miyake

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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 nanometersized photo-induced superhydrophilic domains of the TiO2 film surface located at the interface of the TiO2 surface, oleic acid, and air.

Original languageEnglish
Pages (from-to)513-516
Number of pages4
JournalJournal of the Ceramic Society of Japan
Issue number1426
Publication statusPublished - Jun 2014



  • Photocatalyst
  • Self-cleaning
  • Superhydrophilicity
  • Titanium dioxide

ASJC Scopus subject areas

  • Ceramics and Composites
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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