Topics in Catalysis

, Volume 35, Issue 3, pp 305–310

Photocatalytic Water Splitting on Visible Light-responsive TiO2 Thin Films Prepared by a RF Magnetron Sputtering Deposition Method

  • M. Matsuoka
  • M. Kitano
  • M. Takeuchi
  • M. Anpo
  • J. M. Thomas
Article

DOI: 10.1007/s11244-005-3838-9

Cite this article as:
Matsuoka, M., Kitano, M., Takeuchi, M. et al. Top Catal (2005) 35: 305. doi:10.1007/s11244-005-3838-9

The development of visible light-responsive TiO2 (Vis-TiO2) thin films has been achieved by applying a radio-frequency magnetron sputtering deposition (RF-MS) method. Pt-loaded Vis-TiO2 thin films act as photocatalysts to decompose water involving sacrificial reagent such as methanol or silver nitrate even under visible light (λ ≧ 420 nm) irradiation. It was also found that Pt-loaded Vis-TiO2 thin films decompose pure water into H2 and O2 stoichiometrically under light irradiation of wavelengths longer than 390 nm. Vis-TiO2 thin films exhibit columnar structures perpendicular to the substrate and a declined composition of the O/Ti ratio from the surface (O/Ti = 2.00) to bottom (O/Ti = 1.93). This unique structure (anisotropic structure) of Vis-TiO2 can be considered an important factor in the modification of the electronic properties of Vis-TiO2 thin films, enabling the absorption of visible light. Furthermore, the effect of the Pt loadings on the photocatalytic activity of the TiO2 thin films was investigated and the optimum Pt loading was determined to be 21 μ g/cm2 as Pt metal

Keywords

photocatalytic water splitting visible light TiO2 thin film magnetron sputtering deposition method 

Copyright information

© Springer Science+Business Media, Inc. 2005

Authors and Affiliations

  • M. Matsuoka
    • 1
  • M. Kitano
    • 1
  • M. Takeuchi
    • 1
  • M. Anpo
    • 1
  • J. M. Thomas
    • 2
    • 3
  1. 1.Department of Applied ChemistryGraduate School of EngineeringOsakaJapan
  2. 2.Davy Faraday Research LaboratoryThe Royal Institution of Great BritainLondonUK
  3. 3.Department of Materials Science and MetallurgyUniversity of CambridgeCambridgeUK