Development of a Potential Fe2O3-Based Photocatalyst Thin Film for Water Oxidation by Scanning Electrochemical Microscopy: Effects of Ag-Fe2O3 Nanocomposite and Sn Doping

被引：88

作者：

Jang, Jum Suk ^{[1
]}

Yoon, Ki You ^{[1
]}

Xiao, Xiaoyin ^{[1
]}

Fan, Fu-Ren F. ^{[1
]}

Bard, Allen J. ^{[1
]}

机构：

[1] Univ Texas Austin, Dept Chem & Biochem, Ctr Electrochem, Austin, TX 78712 USA

来源：

CHEMISTRY OF MATERIALS | 2009年 / 21卷 / 20期

关键词：

PHOTOELECTROCHEMICAL PROPERTIES; HYDROGEN-PRODUCTION; ALPHA-FE2O3; FILMS; IRON(III) OXIDE; VISIBLE-LIGHT; SOLAR-CELLS; TIO2; ELECTRODES; NANOPARTICLES; FABRICATION;

D O I：

10.1021/cm901056c

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：

Ag-Fe2O3 and Sn-doped Ag-Fe2O3 nanocomposite photocatalysts were optimized by scanning photoelectrochemical microscopy (SPECM) as a potential photoelectrochemical material for visible light irradiation (lambda >= 420 nm). The photocurrent vs potential response and the action spectra were investigated in a three-electrode cell. Among different mole ratios, the composition of nanocomposite with 50% Ag-50% Fe (atomic percentage) showed a dramatic improvement in photocurrent on a thin film electrode under visible light (lambda >= 420 nm). The addition of 2 atomic % Sn (relative to Fe) produced an Ag-Fe2O3 nanocomposite with the largest photocurrent in alkaline solution under visible light irradiation (lambda >= 420 nm).

引用

页码：4803 / 4810

页数：8

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