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Issue 15, 2000
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Photocatalytic oxygen evolution on α-Fe2O3 films using Fe3+ ion as a sacrificial oxidizing agent

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Abstract

Photocatalytic oxygen evolution on α-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 α-Fe2O3 bandgap of ca. 600 nm (2.1 eV).

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Publication details

The article was received on 17 May 2000, accepted on 12 Jun 2000 and first published on 06 Jul 2000


Article type: Paper
DOI: 10.1039/B003977M
Citation: Phys. Chem. Chem. Phys., 2000,2, 3519-3522
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    Photocatalytic oxygen evolution on α-Fe2O3 films using Fe3+ ion as a sacrificial oxidizing agent

    T. Ohmori, H. Takahashi, H. Mametsuka and E. Suzuki, Phys. Chem. Chem. Phys., 2000, 2, 3519
    DOI: 10.1039/B003977M

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