Preparation of TiO2-based powders with high photocatalytic activities

被引：53

作者：

Kasuga, T ^{[1
]}

Hiramatsu, M ^{[1
]}

Hirano, M ^{[1
]}

Hoson, A ^{[1
]}

Oyamada, K ^{[1
]}

机构：

[1] TECHNO CHUBU CO,R&D CTR,MIDORI KU,NAGOYA,AICHI 459,JAPAN

来源：

JOURNAL OF MATERIALS RESEARCH | 1997年 / 12卷 / 03期

关键词：

D O I：

10.1557/JMR.1997.0090

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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 (approximate to 200 m(2) . g(-1)), they showed poorer activity in a photocatalytic property than the undoped TiO2 powders which;have the area of 50 m(2) . 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.

引用

页码：607 / 609

页数：3