Efficient photocatalytic activity of water oxidation over WO3/BiVO4 composite under visible light irradiation

被引：292
作者：
Chatchai, Ponchio [1 ]
Murakami, Yoshinori [1 ]
Kishioka, Shin-ya [1 ]
Nosaka, Atsuko Y. [1 ]
Nosaka, Yoshio [1 ]
机构：
[1] Nagaoka Univ Technol, Dept Chem, Nagaoka, Niigata 9402188, Japan
来源：
ELECTROCHIMICA ACTA | 2009年 / 54卷 / 03期
关键词：
WO3/BiVO4; Water oxidation; Photo-electrode; Semiconductor composite; Heterojunction; OXIDE THIN-FILMS; O-2; EVOLUTION; WO3; ELECTRODE; BIVO4; DEGRADATION; BEHAVIOR; PHENOL; TIO2; H-2;
D O I：
10.1016/j.electacta.2008.08.058
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
A coupled WO3/BiVO4 thin film has been deposited on IFTO substrate by a spin coating method from precursor solutions. The composite films were characterized by AFM, SEM, XPS and XRD techniques. The incident photon to current efficiency (IPCE) of BiVO4 electrode was increased by 10 times when a WO3 film was layered between the BiVO4 layer and the FTO substrate. The enhanced performance of WO3/BiVO4 composite film electrode is mainly ascribed to the effective electron-hole separations at the semiconductor heterojunction. A schematic mechanism of charge transfer was proposed to explain the photocurrent enhancement for the WO3/BiVO4 electrode Surface. (C) 2008 Elsevier Ltd. All rights reserved.
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收藏
页码：1147 / 1152
页数：6
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