Simultaneous removal of Cr(VI) and phenol contaminants using Z-scheme bismuth oxyiodide/reduced graphene oxide/bismuth sulfide system under visible-light irradiation

Reduction and oxidation processes are excited by two separated photocatalysts

Acong Chen; Zhaoyong Bian; Jie Xu; Xin Xin; Hui Wang

2017

Scholarcy highlights

  • The bismuth oxyiodide and Bi2S3 disperses on RGO sheets during the electrostatic self-assembly
  • Reduction and oxidation processes are excited by two separated photocatalysts
  • The reduction and oxidation reactions were performed on Bi2S3 and bismuth oxyiodide photocatalysts, respectively
  • Complex contaminants of coexisting heavy metal Cr(VI) and organic phenol were treated using the system under visible-light irradiation
  • Results showed that Cr(VI) reduction and phenol oxidation were achieved efficiently with optimum reductive and oxidative efficiencies up to 73% and 95% under visible-light irradiation, respectively
  • This work provided a promising method of simultaneously removing heavy metals and organic pollutants by using a Z-scheme system with enhanced photocatalytic activity

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