Water splitting over CaTa4O11 and LaZrTa 3O11 photocatalysts with laminated structure consisting of layers of TaO6 octahedra and TaO7 decahedra

Motoki Matsui, Akihide Iwase, Hisayoshi Kobayashi, Akihiko Kudo

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CaTa4O11, Ca1-xSrxTa4O 11 (0 ≤ x≤ 0.3), and LaZrTa3O11 with laminated structure consisting of MO6 and MO7 (M = Ta and/or Zr) layers were prepared by a polymerized complex method. These tantalates showed photocatalytic activities for water splitting without cocatalysts. The photocatalytic activity of CaTa4O11 was drastically improved by loading RuO2, Ni, and NiO cocatalysts and by partial substitution of Ca with Sr. The apparent quantum yield of the NiO(0.5 wt%)/Ca0.7Sr0.3Ta4O11 photocatalyst for water splitting was 5.8% at 254 nm.

Original languageEnglish
Pages (from-to)396-398
Number of pages3
JournalChemistry Letters
Issue number4
Publication statusPublished - 2014

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