A p-n heterojunction NiS-sensitized TiO2 photocatalytic system for efficient photoreduction of carbon dioxide to methane. Issue 2 (1st February 2017)

• Record Type: Journal Article
• Authors: Lee, Jae Hyung; Kim, Sung-Il; Park, Sun-Min; Kang, Misook
• Is Part Of: Ceramics international. Volume 43:Issue 2(2017)
• Page Start: 1768
• Page End: 1774
• Publication Date: 2017-02-01
• Subjects: NiS -- NiS-sensitized TiO2 film -- Carbon dioxide photoreduction -- Methane production; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2016.10.122
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Nanoparticles of the p-type semiconductor nickel sulfide are grown on a highly aligned n-type TiO2 film. Using XRD, XPS, EDS, UV–Vis diffuse reflectance spectroscopy, photoluminescence, photocurrent density, and CO2 -TPD, the physicochemical characteristics of the p-n heterojunction NiS-sensitized TiO2 films are investigated. The highest photocurrent is obtained for the optimized 0.10 M NiS-sensitized TiO2 film, which resulted in eventually decreasing the electron-hole recombination during CO2 photoreduction. The NiS-sensitized TiO2 film exhibits superior photocatalytic behavior compared to that of a pure TiO2 film. A model for investigating the catalytic activity of the NiS-sensitized TiO2 film for CO2 photoreduction is proposed.