Energy positions of oxide semiconductors and photocatalysis with iron complex oxides

Matsumoto, Yasumichi

doi:10.1006/jssc.1996.0333

Title: Energy positions of oxide semiconductors and photocatalysis with iron complex oxides

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Abstract

Energy position, bandgap, band structure, and their relationships were reviewed for various oxide semiconductors, especially iron oxides, in photoelectrochemistry and photocatalysis, and the photocatalytic reduction of CO{sub 2} on some iron complex oxides was demonstrated. A linear relationship between bandgap and band edge was obtained for almost all the semiconductor oxides. It was pointed out that a bandgap energy higher than about 2.46 eV is necessary for water photolysis without bias voltage. It was found that the energy positions of the band edge can be controlled by the electronegativity of the metal elements constituting the iron complex oxides. The relationship between the band structure and the charge transfer site was also examined. The photocatalytic reduction of CO{sub 2} to CH{sub 2}OH was demonstrated for CaFe{sub 2}O{sub 4} and Fe-Bi-Sr-Pb-O complex oxides. The photocatalytic activity of the latter oxide with a layer structure increased with increased Pb content. The catalytic mechanism was discussed from the point of view of the redox mechanism as well as the energy position of the band edge.

Authors:

Matsumoto, Yasumichi ^[1]

Kumamoto Univ. (Japan)

Publication Date:: Fri Nov 01 00:00:00 EST 1996

OSTI Identifier:: 478809

Resource Type:: Journal Article

Journal Name:: Journal of Solid State Chemistry

Additional Journal Information:: Journal Volume: 126; Journal Issue: 2; Other Information: PBD: 1 Nov 1996

Country of Publication:: United States

Language:: English

Subject:: 40 CHEMISTRY; 36 MATERIALS SCIENCE; 10 SYNTHETIC FUELS; CALCIUM OXIDES; ELECTRONIC STRUCTURE; CATALYTIC EFFECTS; IRON OXIDES; BISMUTH OXIDES; STRONTIUM OXIDES; LEAD OXIDES; REDUCTION; SEMICONDUCTOR MATERIALS; CATALYSIS; PHOTOCHEMICAL REACTIONS; BAND THEORY; CARBON DIOXIDE

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                    Matsumoto, Yasumichi. Energy positions of oxide semiconductors and photocatalysis with iron complex oxides.  United States: N. p., 1996. 
        Web.  doi:10.1006/jssc.1996.0333.

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                    Matsumoto, Yasumichi. Energy positions of oxide semiconductors and photocatalysis with iron complex oxides.  United States.  https://doi.org/10.1006/jssc.1996.0333

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                    Matsumoto, Yasumichi. 1996.  
        "Energy positions of oxide semiconductors and photocatalysis with iron complex oxides".  United States.  https://doi.org/10.1006/jssc.1996.0333.

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@article{osti_478809,

  title        = {Energy positions of oxide semiconductors and photocatalysis with iron complex oxides},

  author       = {Matsumoto, Yasumichi},

  abstractNote = {Energy position, bandgap, band structure, and their relationships were reviewed for various oxide semiconductors, especially iron oxides, in photoelectrochemistry and photocatalysis, and the photocatalytic reduction of CO{sub 2} on some iron complex oxides was demonstrated. A linear relationship between bandgap and band edge was obtained for almost all the semiconductor oxides. It was pointed out that a bandgap energy higher than about 2.46 eV is necessary for water photolysis without bias voltage. It was found that the energy positions of the band edge can be controlled by the electronegativity of the metal elements constituting the iron complex oxides. The relationship between the band structure and the charge transfer site was also examined. The photocatalytic reduction of CO{sub 2} to CH{sub 2}OH was demonstrated for CaFe{sub 2}O{sub 4} and Fe-Bi-Sr-Pb-O complex oxides. The photocatalytic activity of the latter oxide with a layer structure increased with increased Pb content. The catalytic mechanism was discussed from the point of view of the redox mechanism as well as the energy position of the band edge.},

  doi          = {10.1006/jssc.1996.0333},

  url          = {https://www.osti.gov/biblio/478809},
  journal      = {Journal of Solid State Chemistry},
number       = 2,

  volume       = 126,

  place        = {United States},

  year         = {Fri Nov 01 00:00:00 EST 1996},

  month        = {Fri Nov 01 00:00:00 EST 1996}

}

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