A visible-light active TiO2 photocatalyst multilayered with WO3. Issue 26 (26th June 2017)

• Record Type: Journal Article
• Authors: Jia, Junjun; Taniyama, Kenta; Imura, Masaaki; Kanai, Toshimasa; Shigesato, Yuzo
• Is Part Of: Physical chemistry chemical physics. Volume 19:Issue 26(2017)
• Page Start: 17342
• Page End: 17348
• Publication Date: 2017-06-26
• Subjects: Chemistry, Physical and theoretical -- Periodicals; 541.3
• DOI: 10.1039/c7cp03291a
• Languages: English
• ISSNs: 1463-9076

Abstract

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. 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 CH3 CHO 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.