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BiPO4 photocatalyst employing synergistic action of Ag/Ag3PO4 nanostructure and graphene nanosheets

Mohaghegh, N ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1016/j.solidstatesciences.2016.04.001
  3. Publisher: Elsevier Masson SAS
  4. Abstract:
  5. Graphene-supported BiPO4/Ag/Ag3PO4 photocatalyst has been fabricated by simple hydrothermal and impregnation reaction. In BiPO4/Ag/Ag3PO4 based on Reduced Graphene Oxide (RGO), this network renders numerous pathways for rapid mass transport, strong adsorption and multireflection of incident light; meanwhile, the interface between BiPO4/Ag/Ag3PO4 and RGO increases the active sites and electron transfer rate. BiPO4/Ag/Ag3PO4 based on RGO noticeably exhibited high photocatalytic activity than that of BiPO4/Ag/Ag3PO4 and P25 under visible light irradiation for cationic dye (Rhodamine B), anionic dye (methyl orange) and 4-chlorophenol (4-CP) as a neutral pollutant, which are usually difficult to be degraded over the other catalysts. This enhanced photocatalytic activity of Graphene-supported BiPO4/Ag/Ag3PO4 for all pollutants could be mainly ascribed to the reinforced charge transfer from BiPO4/Ag/Ag3PO4 to RGO, which suppresses the recombination of electron/hole pairs. Besides that, this photocatalyst can be used repetitively with a high photocatalytic activity and no apparent loss of activity occurs. The results reveal that the RGO nanosheets work as a photocatalyst promoter during the photocatalytic reaction, leading to an improved photocatalytic activity
  6. Keywords:
  7. Ag/Ag3PO4 ; BiPO4 nanocomposite ; Graphene ; Photocatalysis ; Azo dyes ; Charge transfer ; Composite films ; Dyes ; Light ; Nanosheets ; Photodegradation ; Pollution ; Silver ; 4-chlorophenol (4-cp) ; Electron transfer rates ; Graphene nanosheets ; High photocatalytic activities ; Photocatalytic activities ; Photocatalytic reactions ; Reduced graphene oxides (RGO) ; Visible-light irradiation
  8. Source: Solid State Sciences ; Volume 56 , 2016 , Pages 10-15 ; 12932558 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S1293255816301091