1. Preparation and visible light catalytic degradation of magnetically recyclable ZnFe2O4/BiOBr flower-like microspheres.
- Author
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Meng, Xiaorong, Yang, Yingzi, Zhang, Liping, Liu, Danghao, Zheng, Huiqi, Huo, Shanshan, and You, Yanan
- Subjects
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MICROPOLLUTANTS , *VISIBLE spectra , *PHOTOELECTRICITY , *MICROSPHERES , *FOURIER transform infrared spectroscopy , *X-ray photoelectron spectroscopy , *TRANSMISSION electron microscopy - Abstract
The construction of a binary heterojunction is a crucial method for solving the low separation efficiency and photon utilization of BiOBr (BOB) photogeneration carriers. In this study, magnetic recyclable ZnFe 2 O 4 /BiOBr (ZFB) heterojunction microspheres containing oxygen vacancies were prepared using a two-step solvothermal method. The results of X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and Brunauer–Emmett–Teller analysis show that ZnFe 2 O 4 (ZFO) induces the growth of a nanolayer structure on the surface of BOB, the diffraction peak intensity ratio of I (102) /I (110) increases, and the specific surface area increases significantly. The analysis of photoelectric characteristics indicates that compared with BOB, ZFB has a smaller bandgap, a larger visible response range, and a higher photogenerated carrier migration and separation efficiency. ZFB can significantly degrade the activated benzene ring in organic molecules, with the degradation efficiency of Rhodamine B (RhB), norfloxacin (NOR), and sulfadiazine (SDZ) reaching 99.04 %, 91.70 %, and 86.64 %, respectively. Under the magnetic recovery, the five-cycle degradation performance retention rate reaches more than 92 %. Holes and superoxide radicals are the main active substances of ZFB photocatalytic materials for degradation of micropollutants. This research provides an idea for the preparation of a green and efficient photocatalytic material with high recyclable efficiency, which can simultaneously degrade various micropollutants in organic wastewater. [Display omitted] • Magnetic ZnFe2O4/BiOBr (ZFB) flower-like microspheres containing oxygen vacancies were prepared • ZnFe2O4 induced the growth and development of BiOBr surface nanosheets • ZnFe2O4 enhanced the photogeneration carrier migration and separation efficiency of BiOBr • ZFB can degrade the activated aromatic ring under visible light catalysis [ABSTRACT FROM AUTHOR]
- Published
- 2023
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