Citation: MENG Ying-Shuang, AN Yi, GUO Qian, GE Ming. Synthesis and Photocatalytic Performance of a Magnetic AgBr/Ag₃PO₄/ZnFe₂O₄ Composite Catalyst[J]. Acta Physico-Chimica Sinica, ;2016, 32(8): 2077-2083. doi: 10.3866/PKU.WHXB201605081 shu

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

MENG Ying-Shuang ^1, ,
AN Yi ² ,
GUO Qian ¹ ,
GE Ming ^1,3

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 Date: 23 February 2016
Revised Date: 6 May 2016

Fund Project: The project was supported by the Natural Science Foundation of Hebei Province, China (B2014209182), Youth Foundation of Hebei Education Department, China (QN2014045) and College Students' Innovative Entrepreneurial Training Plan Program of North China University of Science and Technology, China (X2015117).

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.
- AgBr/Ag₃PO₄/ZnFe₂O₄,
- Magnetism,
- Photocatalysis,
- Visible light,
- Mechanism
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Synthesis and Photocatalytic Performance of a Magnetic AgBr/Ag₃PO₄/ZnFe₂O₄ Composite Catalyst