Preparation and photocatalytic activity of [PWxMo 12-xO40]3-/TiO2 hybrid film composites

Akira Nakajima, Tomohisa Koike, Sayaka Yanagida, Toshihiro Isobe, Yoshikazu Kameshima, Kiyoshi Okada

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Keggin ions (PW12O403- (PW12), PW6Mo6O403- (PW6Mo 6), PMo12O403- (PMo12)) and TiO2 hybrid thin films were prepared using the layer-by-layer (LBL) method. Their photocatalytic activities were investigated using gaseous 2-propanol (IPA) decomposition. All films were transparent in the visible wavelength range. From XPS and UV-vis spectra, it was confirmed that LBL coating was attained using the same thicknesses between Keggin ions and TiO 2. For IPA decomposition, PW12 was the most effective for the combination with TiO2. The PMo12 possessed the highest adsorption capability against gaseous IPA, suggesting the effect of pseudo-liquid phase. Visible-light excitation of reduced Keggin ions will play an important role in the entire photocatalytic activity of IPA decomposition.

Original languageEnglish
Pages (from-to)130-135
Number of pages6
JournalApplied Catalysis A: General
Volume385
Issue number1-2
DOIs
Publication statusPublished - Sep 15 2010
Externally publishedYes

Keywords

  • 2-Propanol
  • Keggin
  • Layer-by-layer method
  • Photocatalyst
  • TiO

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

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