Chinese Journal of Applied Chemistry ›› 2018, Vol. 35 ›› Issue (8): 946-955.DOI: 10.11944/j.issn.1000-0518.2018.08.180148

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Facile Preparation of Bi4V2O11/Reduced Graphene Oxide Heterojunction Photocatalysts for the Degradation of Antibiotic Pollutants

DA Zulin,ZHAO Yong(),SHI Weidong()   

  1. School of Chemistry and Chemical Engineering,Jiangsu University,Zhenjiang,Jiangsu 212013,China
  • Accepted:2017-05-26 Published:2018-07-24 Online:2018-07-24
  • Contact: ZHAO Yong,SHI Weidong
  • Supported by:
    Supported by the National Natural Science Foundation of China(No.21477050, No.21522603, No.21706101), the Henry Fok Education Foundation(No.141068), the Six Talents Peak Project in Jiangsu Province(No.XCL-025), the Chinese-German Cooperation Research Project(No.GZ1091), the China Postdoctoral Foundation(No.2017M611731)

Abstract:

Designing and developing active, cost-effective and stable photocatalysts for the degradation of antibiotic pollutants are still an ongoing challenge. Herein, the fabrication of Bi4V2O11/reduced graphene oxide(BR) composite through a facile hydrothermal reaction, and the effective photocatalytic activity of BR composite towards the degradation of antibiotic pollutants under visible light are demonstrated. The active species of the photocatalytic system are proved to be h+ and ·OH radicals by free radical trapping experiments. Based on the results, a reasonably reaction mechanism to explain the improved photocatalytic activity was also given. The introduction of reduced graphene oxide (rGO) can promote the effective separation of photo-generated electron-hole pairs of Bi4V2O11 materials, and ultimately increase its photocatalytic activity. As the results, the composite shows high activity and excellent stability towards the degradation of antibiotic pollutants. This method produces a high photocatalytic activity based on rGO support, providing a new avenue for designing excellent photocatalysts.

Key words: photocatalysts, Bi4V2O11, graphene, mechanism