Catalysis Letters

, Volume 142, Issue 12, pp 1474–1481 | Cite as

Effects of Silica-Coating on the Photoinduced Hole Formation and Decomposition Activity of Titanium Dioxide Photocatalysts Under UV Irradiation

  • Junichi Oguma
  • Yusuke Kakuma
  • Masami Nishikawa
  • Yoshio Nosaka


Contrary to the general knowledge in practical use of TiO2 photocatalyst, that silica coating improves weather resistance by inhibiting chemical activity against resin, the present study revealed that the number of photoinduced holes was increased and the decomposition activity to gaseous reactants was persistent as the effect of silica coating.

Graphical Abstract

Silica-coating did not block the hole formation, but prevent the adsorption of the reaction intermediates to sustain the photocatalytic activity.


TiO2 Silica coating Photocatalytic reaction ESR 



The authors wish to thank the Analysis & Simulation Center, Asahi Kasei Corporation for their cooperation in the use of STEM-EDX.


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Copyright information

© Springer Science+Business Media New York 2012

Authors and Affiliations

  • Junichi Oguma
    • 1
    • 2
  • Yusuke Kakuma
    • 1
  • Masami Nishikawa
    • 1
  • Yoshio Nosaka
    • 1
  1. 1.Department of Materials Science and TechnologyNagaoka University of TechnologyNagaokaJapan
  2. 2.Department of Latex Research and DevelopmentAsahi Kasei Chemicals CorporationKawasakiJapan

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