A visible-light active TiO2 photocatalyst multilayered with WO3

Junjun Jia, Kenta Taniyama, Masaaki Imura, Toshimasa Kanai, Yuzo Shigesato

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Sputter-deposited TiO2 films with high visible-light photocatalytic activity were successfully realized by a hybrid TiO2/Pt/WO3 film structure with Pt nanoparticles uniformly distributed at the interface of the TiO2 and WO3 films. The TiO2/Pt/WO3 hybrid films enable the complete decomposition of CH3CHO under visible-light irradiation. The water contact angle of the TiO2/Pt/WO3 hybrid films reaches below 5° under visible-light irradiation. Pt nanoparticles are considered to act as a cocatalyst to improve the electron-hole separation efficiency. We demonstrate that the photogenerated holes in WO3 are transferred to the surface of the TiO2 film with less hole-trapping and induce high visible-light photocatalytic activity and hydrophilic behavior, and the photogenerated electrons are accumulated in the Pt nanoparticles. The highly hydrophilic thin films with high visible-light photocatalytic activity can be applied to various indoor products possessing self-cleaning and antifogging properties.

Original languageEnglish
Pages (from-to)17342-17348
Number of pages7
JournalPhysical Chemistry Chemical Physics
Volume19
Issue number26
DOIs
Publication statusPublished - 2017 Jan 1
Externally publishedYes

Fingerprint

Photocatalysts
Nanoparticles
nanoparticles
Irradiation
irradiation
Electrons
cleaning
Contact angle
Cleaning
trapping
Decomposition
decomposition
Thin films
Water
products
thin films
water
electrons

ASJC Scopus subject areas

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

Cite this

A visible-light active TiO2 photocatalyst multilayered with WO3. / Jia, Junjun; Taniyama, Kenta; Imura, Masaaki; Kanai, Toshimasa; Shigesato, Yuzo.

In: Physical Chemistry Chemical Physics, Vol. 19, No. 26, 01.01.2017, p. 17342-17348.

Research output: Contribution to journalArticle

Jia, J, Taniyama, K, Imura, M, Kanai, T & Shigesato, Y 2017, 'A visible-light active TiO2 photocatalyst multilayered with WO3', Physical Chemistry Chemical Physics, vol. 19, no. 26, pp. 17342-17348. https://doi.org/10.1039/c7cp03291a
Jia, Junjun ; Taniyama, Kenta ; Imura, Masaaki ; Kanai, Toshimasa ; Shigesato, Yuzo. / A visible-light active TiO2 photocatalyst multilayered with WO3. In: Physical Chemistry Chemical Physics. 2017 ; Vol. 19, No. 26. pp. 17342-17348.
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