Visible-light-response and photocatalytic activities of TiO2 and SrTiO3 photocatalysts codoped with antimony and chromium

Hideki Kato, Akihiko Kudo

研究成果: Article査読

740 被引用数 (Scopus)

抄録

TiO2 and SrTiO3 codoped with antimony and chromium showed intense absorption bands in the visible light region and possessed 2.2 and 2.4 eV of energy gaps, respectively. TiO2 codoped with antimony and chromium evolved O2 from an aqueous silver nitrate solution under visible light irradiation, while SrTiO3 codoped with antimony and chromium evolved H2 from an aqueous methanol solution. The activity of TiO2 photocatalyst codoped with antimony and chromium was remarkably higher than that of TiO2 doped with only chromium. It was due to that the charge balance was kept by codoping of Sb5+ and Cr3+ ions, resulting in the suppression of formation of Cr6+ ions and oxygen defects in the lattice which should work as effectively nonradiative recombination centers between photogenerated electrons and holes.

本文言語English
ページ(範囲)5029-5034
ページ数6
ジャーナルJournal of Physical Chemistry B
106
19
DOI
出版ステータスPublished - 2002 5 16
外部発表はい

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

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