Preparation and visible-light photocatalytic activity of Au- and Cu-modified TiO2 powders

被引：39

作者：

Nogawa, Takashi ^{[1
]}

Isobe, Toshihiro ^{[1
]}

Matsushita, Sachiko ^{[1
]}

Nakajima, Akira ^{[1
]}

机构：

[1] Tokyo Inst Technol, Grad Sch Sci & Engn, Dept Met & Ceram Sci, Meguro Ku, Tokyo 1528552, Japan

来源：

MATERIALS LETTERS | 2012年 / 82卷

关键词：

TiO2; Au; Cu; Photocatalyst; LSPR; ILLUMINATION; DEPENDENCE; SURFACES; TITANIA; IONS; GOLD;

D O I：

10.1016/j.matlet.2012.05.031

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A rutile powder was modified with either Cu or Au, or both. Then, visible-light photocatalytic activity of the obtained powders was evaluated by the decomposition of gaseous 2-propanol (IPA) to acetone. The modified powders possessed almost identical Cu and Au concentrations, and the difference of specific surface area among the powders was within 10%. The order of acetone generation by photocatalytic decomposition of IPA was Cu-Au-TiO2 > Cu-TiO2 > Au-TiO2 > bare TiO2. The photocatalytic activity measurement by changing the wavelength range of illuminated light suggests that both the localized surface plasmon resonance from Au and the interfacial charge transfer by Cu contribute the entire photocatalytic decomposition activity of IPA on Cu-Au-TiO2 under visible light. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：174 / 177

页数：4

共 23 条

[1] A COMPILATION OF SPECIFIC BIMOLECULAR RATE CONSTANTS FOR REACTIONS OF HYDRATED ELECTRONS HYDROGEN ATOMS AND HYDROXYL RADICALS WITH INORGANIC AND ORGANIC COMPOUNDS IN AQUEOUS SOLUTION [J].