Energy structure and photocatalytic activity for water splitting of Sr2(Ta1-XNbX)2O7 solid solution

Hideki Kato, Akihiko Kudo

研究成果: Article査読

94 被引用数 (Scopus)

抄録

Photophysical and photocatalytic properties of Sr2(Ta1-XNbX)2O7 with layered perovskite structure were studied to explore the possibility of energy structure control by making a solid solution. The band gap of Sr2(Ta1-XNbX)2O7 was decreased as the ratio of niobium to tantalum was increased. The Sr2(Ta1-XNbX)2O7 solid solution photocatalysts loaded with NiO co-catalysts decomposed water into H2 and O2 in a stoichiometric ratio. A NiO/Sr2Ta2O7 photocatalyst showed the highest activity. The photocatalytic activity was drastically decreased by substitution of a small amount of niobium (X=0.05) for tantalum. However, a Sr2(Ta0.75Nb0.25)2O7 photocatalyst showed a relatively high activity among the solid solutions of Sr2(Ta1-XNbX)2O7(0<X<1). The activities of Sr2(Ta1-XNbX)2O7 solid solution photocatalysts depended on the conduction band level and the efficiency of non-radiative recombination between photogenerated electron-hole pairs.

本文言語English
ページ(範囲)129-133
ページ数5
ジャーナルJournal of Photochemistry and Photobiology A: Chemistry
145
1-2
DOI
出版ステータスPublished - 2001 11 29
外部発表はい

ASJC Scopus subject areas

  • 化学 (全般)
  • 化学工学(全般)
  • 物理学および天文学(全般)

フィンガープリント

「Energy structure and photocatalytic activity for water splitting of Sr<sub>2</sub>(Ta<sub>1-X</sub>Nb<sub>X</sub>)<sub>2</sub>O<sub>7</sub> solid solution」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

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