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Issue 1, 2015
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Sensitization of wide band gap photocatalysts to visible light by molten CuCl treatment

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Abstract

Cu(I)-substituted metal oxide photocatalysts were prepared using molten CuCl treatment of wide band gap photocatalysts. The Cu(I)-substituted metal oxide photocatalysts possessed a new absorption band in the visible light region and showed photocatalytic activity for hydrogen evolution from an aqueous solution containing sulfur sacrificial reagents under visible light irradiation. Notably, the Cu(I)–K2La2Ti3O10 and Cu(I)–NaTaO3 photocatalysts showed relatively high activities for hydrogen evolution and gave apparent quantum yields of 0.18% at 420 nm. These photocatalysts responded up to 620 nm. Thus, Cu(I)-substitution using a molten CuCl treatment was an effective strategy for sensitizing a metal oxide photocatalyst with a wide band gap to visible light.

Graphical abstract: Sensitization of wide band gap photocatalysts to visible light by molten CuCl treatment

  • This article is part of the themed collection: Catalysis
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Publication details

The article was received on 20 Jun 2014, accepted on 29 Aug 2014 and first published on 29 Aug 2014


Article type: Edge Article
DOI: 10.1039/C4SC01829J
Citation: Chem. Sci., 2015,6, 687-692
  • Open access: Creative Commons BY-NC license
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    Sensitization of wide band gap photocatalysts to visible light by molten CuCl treatment

    K. Iwashina, A. Iwase and A. Kudo, Chem. Sci., 2015, 6, 687
    DOI: 10.1039/C4SC01829J

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