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Crystallization of titania in liquid media and photochemical properties of crystallized titania

Published online by Cambridge University Press:  31 January 2011

Shu Yin ,
Yuichi Inoue ,
Satoshi Uchida ,
Yoshinobu Fujishiro  and
Tsugio Sato
Shu Yin
Affiliation:
Institute for Chemical Reaction Science, Tohoku University, Sendai 980–77, Japan
Yuichi Inoue
Affiliation:
Institute for Chemical Reaction Science, Tohoku University, Sendai 980–77, Japan
Satoshi Uchida
Affiliation:
Institute for Chemical Reaction Science, Tohoku University, Sendai 980–77, Japan
Yoshinobu Fujishiro
Affiliation:
Institute for Chemical Reaction Science, Tohoku University, Sendai 980–77, Japan
Tsugio Sato
Affiliation:
Institute for Chemical Reaction Science, Tohoku University, Sendai 980–77, Japan
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Abstract

Titania gels in liquid media crystallized from amorphous to anatase at temperatures as low as 120 °C, while the onset of crystallization in air was 370 °C. The crystallization rate in water was much faster than in methanol and n-hexane, and the crystallite size of anatase prepared in water was larger than of those prepared in organic solvents. The crystallized powders were capable of efficient hydrogen evolution following band gap irradiation in the presence of a sacrificial hole acceptor such as methanol. The photocatalytic activity of powder crystallized in methanol was superior to those prepared in water and air.

Type
Articles
Information
Journal of Materials Research , Volume 13 , Issue 4 , April 1998 , pp. 844 - 847
Copyright
Copyright © Materials Research Society 1998

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References

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