Reaction Mechanism and Activity of WO3-Catalyzed Photodegradation of Organic Substances Promoted by a CuO Cocatalyst

被引：118

作者：

Arai, Takeo ^{[1
]}

Horiguchi, Masumi ^{[1
,2
]}

Yanagida, Masatoshi ^{[1
]}

Gunji, Takahiro ^{[1
,2
]}

Sugihara, Hideki ^{[1
]}

Sayama, Kazuhiro ^{[1
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, Energy Technol Res Inst, Tsukuba, Ibaraki 3058565, Japan

[2] Tokyo Univ Sci, Grad Sch Sci & Technol, Chiba 2788510, Japan

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2009年 / 113卷 / 16期

关键词：

PHOTOCATALYTIC ACTIVITY; COMPLETE OXIDATION; LIGHT; COPPER; TIO2; REDUCTION; PLATINUM; OXYGEN; WATER; DECOMPOSITION;

D O I：

10.1021/jp8111342

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：

WO3 is known as a visible-light-responsive photocatalyst; however, WO3 has low activity for the photodegradation of organic substances in the absence of cocatalysts. The activity Of WO3 was significantly improved by the loading of CuO as a cocatalyst, and this catalyst system can be used practically because it is inexpensive and easy to prepare. We investigated the properties of a CuO/WO3 catalyst by means of XPS measurements, electrochemical measurements, and a layered model reaction, and we proposed a reaction mechanism Of CuO/WO3 in which CuO promotes oxygen reduction for WO3-catalyzed photodegradation by the Cu(II)/Cu(I) redox reaction. Furthermore, the oxygen reduction reaction over CuO was improved by light irradiation of CuO. The optimized CuO/WO3 photocatalyst showed higher activity for the photodegradation of acetaldehyde than did N-TiO2 and TiO2 under fluorescent-lamp irradiation simulating that used in indoor applications.

引用

页码：6602 / 6609

页数：8

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