Chapter 79. High-Temperature Phase Stability and Improvement of Photo Catalysis for Anatase Phase TiO2

  1. Waltraud M. Kriven and
  2. Hua-Tay Lin
  1. Toshiro Tanaka,
  2. Mitsuhide Kubota,
  3. Katuhito Nakano,
  4. Eiji Okutani and
  5. Takashi Nishikawa

Published Online: 26 MAR 2008

DOI: 10.1002/9780470294826.ch79

27th Annual Cocoa Beach Conference on Advanced Ceramics and Composites: B: Ceramic Engineering and Science Proceedings, Volume 24, Issue 4

27th Annual Cocoa Beach Conference on Advanced Ceramics and Composites: B: Ceramic Engineering and Science Proceedings, Volume 24, Issue 4

How to Cite

Tanaka, T., Kubota, M., Nakano, K., Okutani, E. and Nishikawa, T. (2003) High-Temperature Phase Stability and Improvement of Photo Catalysis for Anatase Phase TiO2, in 27th Annual Cocoa Beach Conference on Advanced Ceramics and Composites: B: Ceramic Engineering and Science Proceedings, Volume 24, Issue 4 (eds W. M. Kriven and H.-T. Lin), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294826.ch79

Author Information

  1. Department of Materials Science and Engineering, Ehime University, Matsuyama, 790-8577 Japan

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2003

ISBN Information

Print ISBN: 9780470375846

Online ISBN: 9780470294826

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Keywords:

  • anatase structure;
  • photocatalysis;
  • phase stability;
  • photocatalytic;
  • phase transformation

Summary

TiO2 having Anatase structure is a promising candidate for use in highly effective photocatalysis. We have studied the phase stability and an improvement in the efficiency of the photocatalytic ability of TiO2 by mixing TiO2 with metal elements in their oxide form. The Anatase phase was found to be strongly stabilized by mixing with commercial grade tungsten oxide powder. Even when fired at over 900°C, at which Anatase phase usually changes to Rutile phase, only 1 mol% WO3 mixed into TiO2 powder maintained an Anatase structure after firing. The activation energy of the phase transformation was found to be approximately six times larger than that of non-doped TiO2. The efficiency of photocatalysis for WO3 mixed TiO2 was also found to be higher than that for non-doped TiO2.