Photocatalytic activity of titania particles calcined at high temperature: Investigating deactivation

被引：20

作者：

Amano, Fumiaki ^{[1
]}

Nakata, Masashi ^{[1
]}

Asami, Kenji ^{[1
]}

Yamakata, Akira ^{[2
,3
]}

机构：

[1] Univ Kitakyushu, Grad Sch Environm Engn, Kitakyushu, Fukuoka 8080135, Japan

[2] Toyota Technol Inst, Grad Sch Engn, Nagoya, Aichi 4688511, Japan

[3] Japan Sci & Technol Agcy JST, Precursory Res Embryon Sci & Technol PRESTO, Kawaguchi, Saitama 3320012, Japan

来源：

CHEMICAL PHYSICS LETTERS | 2013年 / 579卷

基金：

日本学术振兴会;

关键词：

TIO2 NANOWIRE ARRAYS; ABSORPTION-SPECTROSCOPY; WATER;

D O I：

10.1016/j.cplett.2013.06.038

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：

We examined the effect of high temperature calcination on the photocatalytic activity and photoexcited electron behavior of rutile TiO2 with a small specific surface area. Photocatalytic activity for H-2 evolution was significantly decreased by calcination at temperatures higher than 500 degrees C, although the specific surface area showed little change. This deactivation was attributed to fast charge carrier recombination. Samples deactivated by high temperature calcination were reduced by hydrogen at 500 or 700 degrees C, increasing both the density of long-lived charge carriers and photocatalytic activity. These results suggest that density of oxygen vacancies is an important factor for photocatalytic reactivity. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：111 / 113

页数：3

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