Efficient Visible Light Active CaFe2O4/WO3 Based Composite Photocatalysts: Effect of Interfacial Modification

被引：183

作者：

Liu, Zhifu ^{[1
]}

Zhao, Zhi-Gang ^{[1
]}

Miyauchi, Masahiro ^{[1
]}

机构：

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

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2009年 / 113卷 / 39期

关键词：

WO3-CATALYZED PHOTODEGRADATION; TIO2; PHOTOCATALYSTS; SEMICONDUCTORS; DEGRADATION; ACETALDEHYDE; MECHANISM; DIOXIDE; OXYGEN;

D O I：

10.1021/jp906195f

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 report oil the photocatalytic decomposition of acetaldehyde over CaFe2O4 (CFO)/WO3 based composite photocatalysts under visible light irradiation, emphasizing the photocatalyst composition optimization and the effect of interface modification oil photocatalytic activity. Although heat treatment caused deactivation of CFO/WO3 Composite photocatalyst, the photocatalytic activity of WO3 was improved by simply mixing with CFO, and 5 wt % CFO coupled WO3 showed the optimized performance. Ag and ITO coating on the CFO particle surface obviously promoted the photocatalytic activity of the CFO/WO3 composite. The CFO/Ag (or ITO)/WO3 composite photocatalyst could completely decompose acetaldehyde under visible light irradiation. X-ray photoelectron spectra suggested that the photoinduced self-reduction in WO3 was effectively suppressed after coupling with CFO. The possible mechanism of the surface modification effects was discussed.

引用

页码：17132 / 17137

页数：6

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