Photocatalytic oxygen evolution on α-Fe2O3 films using Fe3+ ion as a sacrificial oxidizing agent

被引：141

作者：

Ohmori, T ^{[1
]}

Takahashi, H ^{[1
]}

Mametsuka, H ^{[1
]}

Suzuki, E ^{[1
]}

机构：

[1] Res Inst Innovat Technol Earth, Kizu, Kyoto 6190292, Japan

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2000年 / 2卷 / 15期

关键词：

D O I：

10.1039/b003977m

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：

Photocatalytic oxygen evolution on alpha-Fe2O3 films was studied using the Fe3+ ion as a sacrificial oxidizing agent. The reaction conditions affecting the oxygen evolution rate, i.e. anion, Fe3+ concentration, pH, Fe3+/Fe2+ equilibrium concentration and dependence of irradiation wavelength, were investigated. The reaction rate increased with increase of both the Fe3+ ion concentration and the solution pH. Oxygen evolution ceased at an Fe3+:Fe2+ ion concentration ratio of 3:7-4:6. The reaction rate decreased rapidly for longer-wavelength irradiation (above around 400 nm), which is considerably shorter than the alpha-Fe2O3 bandgap of ca. 600 nm (2.1 eV).

引用

页码：3519 / 3522

页数：4

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