Acta Phys. -Chim. Sin. ›› 2016, Vol. 32 ›› Issue (8): 2077-2083.doi: 10.3866/PKU.WHXB201605081

• ARTICLE • Previous Articles     Next Articles

Synthesis and Photocatalytic Performance of a Magnetic AgBr/Ag3PO4/ZnFe2O4 Composite Catalyst

Ying-Shuang MENG1,Yi AN2,Qian GUO1,Ming GE1,3,*()   

  1. 1 College of Chemical Engineering, North China University of Science and Technology, Tangshan 063009, Hebei Province, P. R. China
    2 Yisheng Innovation Education Base, North China University of Science and Technology, Tangshan 063009, Hebei Province, P. R.China
    3 Hebei Key Laboratory of Photocatalytic and Electrocatalytic Materials for Environment, Tangshan 063009, Hebei Province, P. R. China
  • Received:2016-02-23 Published:2016-07-29
  • Contact: Ming GE E-mail:geminggena@163.com
  • Supported by:
    the Natural Science Foundation of Hebei Province, China(B2014209182);Youth Foundation of Hebei Education Department, China(QN2014045);College Students′Innovative Entrepreneurial Training Plan Program of North China University of Science and Technology, China(X2015117)

Abstract:

Hydrothermal processing in conjunction with in situ precipitation were successfully applied to synthesize the magnetic composite catalyst silver bromide/silver phosphate/zinc ferrite (AgBr/Ag3PO4/ZnFe2O4). The phase structure, composition, morphology, and optical property of this material were subsequently assessed by X-ray diffraction, energy dispersive X-ray spectroscopy, field emission scanning electron microscopy, transmission electron microscopy, and UV-Vis diffuse reflectance spectroscopy. Under visible light illumination, the as-prepared AgBr/Ag3PO4/ZnFe2O4 photocatalyst exhibited superior photocatalytic performance during rhodamine B (RhB) degradation compared with Ag3PO4/ZnFe2O4, AgBr/ZnFe2O4, and P25 TiO2. This new catalyst also showed excellent photocatalytic activity in both acidic and basic solutions. The RhB photodegradation rate was slightly increased at higher temperatures, and the activation energy for this reaction was determined to be 31.9 kJ·mol-1 according to the Arrhenius equation. The high performance of the AgBr/Ag3PO4/ZnFe2O4 catalyst can be attributed to efficient photo-induced charge separation, and the generation of superoxide radicals and holes that are responsible for RhB degradation.

Key words: AgBr/Ag3PO4/ZnFe2O4, Magnetism, Photocatalysis, Visible light, Mechanism

MSC2000: 

  • O644