Preparation of S, C cation-codoped SrTiO3 and its photocatalytic activity under visible light

被引：172

作者：

Ohno, T

Tsubota, T

Nakamura, Y

Sayama, K

机构：

[1] Kyushu Inst Technol, Fac Engn, Dept Appl Chem, Kitakyushu, Fukuoka 8048550, Japan

[2] Natl Inst Adv Ind Sci & Technol, Energy Elect Inst, Tsukuba, Ibaraki 3058565, Japan

来源：

APPLIED CATALYSIS A-GENERAL | 2005年 / 288卷 / 1-2期

关键词：

strontium titanate; visible light activity; photocatalyst; doping of S cation; doping of C cation; utilization of solar light;

D O I：

10.1016/j.apcata.2005.04.035

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

S, C cation-codoped strontium titanium dioxide (SrTiO3) was synthesized by calcination of a mixture of thiourea and SrTiO3 powders in a lidded crucible. After C and S ions were doped into SrTiO3, the absorption edge of SrTiO3 powder was greatly shifted from 400 to 700 nm. The obtained powder was found by XPS, XRD and FIF-IR to have a perovskite structure in which C and S atoms were incorporated into SrTiO3. S and C doping improved the photocatalytic activity of the doped SrTiO3 for oxidation of 2-propanol. Under a wide range of light irradiation at wavelengths longer than 350 nm, the photocatalytic activity levels of C, S cation-codoped SrTiO3 were about two times higher than those of pure SrTiO3. We found that a new absorption edge was formed in the visible light region due to doping of S and C atoms. The formation of this new absorption edge might be the reason for the high level of visible-light photocatalytic activity of this substance. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：74 / 79

页数：6