Formation of new crystal faces on TiO2 particles by treatment with aqueous HF solution or hot sulfuric acid

被引：86

作者：

Taguchi, T ^{[1
]}

Saito, Y ^{[1
]}

Sarukawa, K ^{[1
]}

Ohno, T ^{[1
]}

Matsumura, M ^{[1
]}

机构：

[1] Osaka Univ, Res Ctr Solar Energy Chem, Osaka 5608531, Japan

来源：

NEW JOURNAL OF CHEMISTRY | 2003年 / 27卷 / 09期

关键词：

D O I：

10.1039/b304518h

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We have demonstrated that new crystal faces are generated on anatase and rutile TiO2 particles by means of chemical etching in aqueous hydrofluoric acid or hot sulfuric acid. In the treatment with aqueous hydrofluoric acid, the {112} face of anatase particles and the {021} face of rutile particles are newly formed. When treated with hot sulfuric acid, anatase particles exposed the {122} face and rutile particles exposed the {001}, {010}, {021} and {121} faces. In both cases, anatase particles are etched at a higher rate than rutile particles. The etched particles are expected to show photocatalytic properties unique to the crystal faces. For example, the {112} face of anatase particles is demonstrated to be active in the oxidation of Pb2+ ions.

引用

页码：1304 / 1306

页数：3

共 18 条

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