Topics in Catalysis

, Volume 35, Issue 3, pp 327–330

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

Authors

  • Satoru Dohshi
    • Department of Applied Chemistry, Graduate School of EngineeringOsaka Prefecture University
    • Department of Applied Chemistry, Graduate School of EngineeringOsaka Prefecture University
  • Shuichi Okuda
    • Research Center for Radiation and Radioisotopes, Research Institute for Advanced Science and TechnologyOsaka Prefecture University
  • Takao Kojima
    • Research Center for Radiation and Radioisotopes, Research Institute for Advanced Science and TechnologyOsaka Prefecture University
Article

DOI: 10.1007/s11244-005-3841-1

Cite this article as:
Dohshi, S., Anpo, M., Okuda, S. et al. Top Catal (2005) 35: 327. doi:10.1007/s11244-005-3841-1

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 Crystalshydrophilicity of TiO2 surfacesContact anglev-irradiationwater droplet

Copyright information

© Springer Science+Business Media, Inc. 2005