Characterization of Cr(III)-grafted TiO2 for photocatalytic reaction under visible light

被引：84

作者：

Irie, Hiroshi ^{[1
]}

Shibanuma, Toshihiko ^{[2
]}

Kamiya, Kazuhide ^{[2
]}

Miura, Shuhei ^{[2
]}

Yokoyama, Toshihiko ^{[3
]}

Hashimoto, Kazuhito ^{[2
,4
]}

机构：

[1] Univ Yamanashi, Clean Energy Res Ctr, Yamanashi 4008511, Japan

[2] Univ Tokyo, Sch Engn, Dept Appl Chem, Bunkyo Ku, Tokyo 1138656, Japan

[3] Inst Mol Sci, Okazaki, Aichi 4448585, Japan

[4] Univ Tokyo, Adv Sci & Technol Res Ctr, Meguro Ku, Tokyo 1538904, Japan

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2010年 / 96卷 / 1-2期

关键词：

Photocatalysis; Visible light; Cr(III) ion; TiO2; Oxidative decomposition; TITANIUM-DIOXIDE; OXIDE PHOTOCATALYSTS; THIN-FILMS; ILLUMINATION; HYDROPHILICITY; PARTICLES; WATER; UV;

D O I：

10.1016/j.apcatb.2010.02.011

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

We investigated the chemical state and environment of Cr ions in a Cr ion-grafted TiO2 photocatalyst by means of X-ray absorption fine structure (XAFS) measurements. The XAFS results indicated that the Cr ions exist on TiO2 as Cr(III) in an amorphous Cr2O3-like structure. The Cr2O3-like structure formed clusters and attached to the TiO2 surface. The activity (CO2 generation rate and QE value) was evaluated by 2-propanol decomposition under visible light (1 mW cm(-2), 450-580 nm) and was highest with a weight fraction of Cr/TiO2 equaling 1.0 x 10(-3). In addition, the activity of the Cr(III)-grafted TiO2 photocatalyst was highly reproducible. (c) 2010 Elsevier B.V. All rights reserved.

引用

页码：142 / 147

页数：6

共 23 条

[1]

The design and development of highly reactive titanium oxide photocatalysts operating under visible light irradiation [J].