Effects of selective leaching of bismuth oxide sheets in triple-layered Aurivillius phases on their photocatalytic activities

Manabu Kudo, Saki Tsuzuki, Ken Ichi Katsumata, Atsuo Yasumori, Yoshiyuki Sugahara

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

The photocatalytic activities of triple-layered Aurivillius phases, Bi 2ANaNb3O12 (A =Sr, Ca) and Bi2CaNaTa3O12, and of protonated forms prepared from these Aurivillius phases through selective leaching of bismuth oxide sheets were investigated. UV-Vis diffuse reflectance spectra showed blue shifts of the adsorption edges upon selective leaching. Although none of the triple-layered Aurivillius phases were active for photocatalytic H2 evolution from a 20 vol% ethanol solution, all the corresponding protonated forms showed photocatalytic activities for H 2 evolution. The effects of the changes in electronic structures and interlayer surface creation on photocatalytic activities are discussed.

Original languageEnglish
Pages (from-to)12-16
Number of pages5
JournalChemical Physics Letters
Volume393
Issue number1-3
DOIs
Publication statusPublished - 2004 Jul 21

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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