Photocatalytic and electrochemical performance of three-Dimensional reduced graphene Oxide/WS2/Mg-doped ZnO composites

Weiwei Yu, Xi'an Chen, Wei Mei, Chuansheng Chen, Yuen Hong Tsang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

57 Citations (Scopus)

Abstract

To improve the dispersion of reduced graphene oxide and enhance the photocatalytic property of reduced graphene oxide/Mg-doped ZnO composites (rGMZ), the reduced graphene oxide/WS2/Mg-doped ZnO composites (rGWMZ) were prepared by electrostatic self-assembly and coprecipitation methods. The effects of mass ratio of WS2nanosheets to reduced graphene oxide (WS2/rGO wt.%) and calcination temperature on the photocatalytic and electrochemical property of rGWMZ composites were investigated. Experimental results showed that the photocatalytic efficiency of rGWMZ composites is three-fold compared with that of rGMZ composites when the WS2/rGO wt.% is 20.8% and calcination temperature is 500 °C, in which the degradation ratio Rhodamin B (RhB) can reach 95% within 15 min under the UV light and 90% within 90 min under simulated solar light. In addition, the rGWMZ show larger capacitance and smaller resistance than rGMZ. The enhancement for photocatalytic activity and electrochemical performance of rGWMZ is ascribed to improving the specific surface area, electrical conductivity and electronic storage capability because of the synergistic effect of rGO and WS2nanosheets.
Original languageEnglish
Pages (from-to)129-138
Number of pages10
JournalApplied Surface Science
Volume400
DOIs
Publication statusPublished - 1 Apr 2017

Keywords

  • Electrochemical performance
  • Photocatalytic properties
  • Reduced graphene oxide
  • Synergistic effect
  • WS nanosheet 2

ASJC Scopus subject areas

  • Surfaces, Coatings and Films

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