Topics in Catalysis

, Volume 35, Issue 3–4, pp 327–330 | Cite as

Effect of γ-ray Irradiation on the Wettability of TiO2 Single Crystals

  • Satoru Dohshi
  • Masakazu Anpo
  • Shuichi Okuda
  • Takao Kojima

The contact angles of the water droplets on TiO2 single crystal surfaces decreased and became superhydrophilic state by γ-ray irradiation. It was found that these behaviors were dependent on γ-ray irradiation atmosphere, i.e., in air and in N2 atmosphere (r. h.; 30%) as well as crystal faces of TiO2 single crystals, i.e., TiO2 (100) and (110) surfaces. It was also found from the results of UV–Vis and ESR measurements that γ-ray irradiation under N2 atmosphere led to the oxygen vacancies and associated Ti3+, regardless of the presence of gaseous water. Moreover, it was suggested that the organic molecules adsorbed on TiO2 single crystal surfaces decomposed by γ-ray irradiation.

Keywords

TiO2 single Crystals hydrophilicity of TiO2 surfaces Contact angle v-irradiation water droplet 

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Copyright information

© Springer Science+Business Media, Inc. 2005

Authors and Affiliations

  • Satoru Dohshi
    • 1
  • Masakazu Anpo
    • 1
  • Shuichi Okuda
    • 2
  • Takao Kojima
    • 2
  1. 1.Department of Applied Chemistry, Graduate School of EngineeringOsaka Prefecture UniversityOsakaJapan
  2. 2.Research Center for Radiation and Radioisotopes, Research Institute for Advanced Science and TechnologyOsaka Prefecture UniversityOsakaJapan

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