Preparation and Visible-Light-Driven Photocatalytic Performance of Magnetic SrFe12O19/BiVO4

• Published in: Journal of materials engineering and performance 2015-02, Vol.24 (2), p.771-777
• Main Authors: Chenglun, Liu, Hui, Li, Heping, Ye, Longjun, Xu
• Format: Article
• Language: English
• Subjects: Characterization and Evaluation of Materials; Chemistry and Materials Science; Corrosion and Coatings; Engineering Design; Materials Science; Quality Control; Reliability; Safety and Risk; Tribology
• ISSN: 1059-9495; 1544-1024
• DOI: 10.1007/s11665-014-1362-4

SrFe 12 O 19 /BiVO 4 was synthesized by chemical coprecipitation method using tartaric acid as complexant. X-ray diffraction investigation revealed that the introduction of SrFe 12 O 19 did not change the crystal orientation of monoclinic architecture BiVO 4 . Micro-morphology study indicated that BiVO 4 molecules uniformly distributed on the surface of hexagonal SrFe 12 O 19 particles. Vibrating sample magnetometer measurement manifested that 15%SrFe 12 O 19 /BiVO 4 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%SrFe 12 O 19 /BiVO 4 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.