光催化
材料科学
异质结
电子顺磁共振
可见光谱
光化学
降级(电信)
复合数
空位缺陷
化学工程
催化作用
光电子学
化学
复合材料
核磁共振
有机化学
电子工程
物理
结晶学
工程类
作者
Pengfei Zhu,Jing Xu,Lisi Xie,Ming Duan,Xiaolong Wu,Xingyang Xiao,Mei Liu
标识
DOI:10.1016/j.colsurfa.2022.128810
摘要
In this work, magnetic oxygen vacancy-BiOBr/CoFe2O4 (OV-BiOBr/CoFe2O4) composite with Z-scheme heterojunction was prepared by simple solvothermal method. The physicochemical properties of the prepared samples were characterized. The degradation rate of norfloxacin (NOR) by OV-BiOBr/CoFe2O4 under visible light irradiation can reach 94.61%. In addition, OV-BiOBr/CoFe2O4 composite also exhibits excellent photocatalytic performance for other antibiotics, it can be recovered by external magnetic field and still shows good photocatalytic activity after four consecutive times uses. Characterization and experimental results show that the improved photocatalytic performance of OV-BiOBr/CoFe2O4 can be attributed to the improvement of visible light response range, the increase of active sites and the effective separation of electron hole pairs. The results of free radical capture experiment and electron paramagnetic resonance spectra show that •O2− and h+ are the main active substance in photocatalytic degradation of NOR system. Then, combined with the band structure, a Z-scheme heterojunction electron transfer mechanism is proposed. This work enhances the photocatalytic performance of BiOBr and provides a new idea for antibiotic wastewater treatment.
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