期刊
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
卷 24, 期 2, 页码 771-777出版社
SPRINGER
DOI: 10.1007/s11665-014-1362-4
关键词
degradation kinetics; magnetic property; photocatalytic performance; SrFe12O19/BiVO4; visible light
资金
- National Natural Science Foundation of China [51374259]
- Graduate Innovation Program of Chongqing [CYB14040]
- Scientific Research Foundation of State Key Lab. of Coal Mine Disaster Dynamics and Control, PR China [2011DA105287-MS201206]
- Fundamental and advanced research projects of Chongqing Science and Technology Commission, PR China [2013jjB20001]
- Scientific & Technologic Program for the Bureau of Land Resources and Housing Management of Chongqing, PR China [CQGT-KJ-2014012]
SrFe12O19/BiVO4 was synthesized by chemical coprecipitation method using tartaric acid as complexant. X-ray diffraction investigation revealed that the introduction of SrFe12O19 did not change the crystal orientation of monoclinic architecture BiVO4. Micro-morphology study indicated that BiVO4 molecules uniformly distributed on the surface of hexagonal SrFe12O19 particles. Vibrating sample magnetometer measurement manifested that 15%SrFe12O19/BiVO4 possessed better magnetic property, which was conducive to its separation and reuse. Ultraviolet-visible diffuse reflectance spectrophotometer detection showed the strong absorption of the composite in visible light. Photocatalytic performances of as-prepared composites were investigated with the degradation of methylene blue (MB) under visible light irradiation. The maximum degradation ratio of MB with 15%SrFe12O19/BiVO4 was 93% at 5 h, and the recovery ratio of the magnetic catalyst was above 90% in each cycle. It was confirmed that the photodegradation process of MB was first-order reaction, and the dominant active species were O (2) (.) radicals and holes.
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