Photo-catalytic effect enhanced by the chemisorption of phenylethyl-mercaptan-assembled monolayers on Au-clusters/TiO 2-anatase thin film

Chi Yuan Kao, Jiunn Der Liao, I. Wen Huang, Chia Wei Chang

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

A simple process is employed to increase the efficiency of TiO 2 photo-catalytic activity, for which the recombination probability of electron-hole pairs is relaxed. Au is selectively deposited on a high-transparency TiO 2-anatase thin film on a glass substrate, and then phenylethyl mercaptan (PEM) is chemisorbed onto the selectively covered Au-clusters/TiO 2-anatase thin film. The enhancement of the photo-catalytic activity on the PEM/Au-clusters/TiO 2-anatase thin film is evaluated via the induced degradation of methylene blue. The results demonstrate that the Au coverage ratio on TiO 2-anatase thin film and the photo-catalytic activity of the chemisorbed PEM/Au-clusters/TiO 2-anatase are related. The photo-catalytic contribution of PEM/Au-clusters/TiO 2-anatase differs from that of Au on a TiO 2-anatase thin film. An optimized photo-catalytic system, a composite of PEM/3.8% Au-clusters/TiO 2-anatase thin film, is proposed. The efficiency of the PEM/3.8% Au-clusters/TiO 2-anatase thin film is 52.1% higher than that of the as-deposited TiO 2-anatase thin film.

Original languageEnglish
Pages (from-to)4887-4891
Number of pages5
JournalSurface and Coatings Technology
Volume206
Issue number23
DOIs
Publication statusPublished - 2012 Jul 15

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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