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Preparation of TiO2-based powders with high photocatalytic activities

Published online by Cambridge University Press:  31 January 2011

Tomoko Kasuga ,
Masayoshi Hiramatsu ,
Masayoshi Hirano ,
Akihiko Hoson  and
Kyoko Oyamada
Tomoko Kasuga
Affiliation:
Electric Power Research and Development Center, Chubu Electric Power Co. Inc., Oodaka, Midori-ku, Nagoya 459, Japan
Masayoshi Hiramatsu
Affiliation:
Electric Power Research and Development Center, Chubu Electric Power Co. Inc., Oodaka, Midori-ku, Nagoya 459, Japan
Masayoshi Hirano
Affiliation:
Electric Power Research and Development Center, Chubu Electric Power Co. Inc., Oodaka, Midori-ku, Nagoya 459, Japan
Akihiko Hoson
Affiliation:
Electric Power Research and Development Center, Chubu Electric Power Co. Inc., Oodaka, Midori-ku, Nagoya 459, Japan
Kyoko Oyamada
Affiliation:
R & D Center, Techno Chubu Company, Oodaka, Midori-ku, Nagoya 459, Japan
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Abstract

TiO2-based powders doped with a small amount of SiO2 were prepared by a sol-gel method and subsequently were heated to precipitate fine anatase crystals. Although the obtained powders have large specific surface areas (≈200 m2 · g−1), they showed poorer activity in a photocatalytic property than the undoped TiO2 powders which have the area of 50 m2 · g−1. The SiO2-doped TiO2 powders were treated chemically with aqueous NaOH. Infrared reflection spectra showed that the treatment reduced the amount of SiO2 in the powders. The photocatalytic property of the powders was extremely improved by the treatment, and the powders showed higher activity than the undoped TiO2 powders.

Type
Articles
Information
Journal of Materials Research , Volume 12 , Issue 3 , March 1997 , pp. 607 - 609
Copyright
Copyright © Materials Research Society 1997

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