Visible-Light-Driven Photocatalytic Activity of Magnetic BiOBr/SrFe<sub>12</sub>O<sub>19</sub> Nanosheets
Taiping Xie,
Jiao Hu,
Jun Yang,
Chenglun Liu,
Longjun Xu,
Jiankang Wang,
Yuan Peng,
Songli Liu,
Xiuyu Yin,
Yuanzhen Lu
Affiliations
Taiping Xie
State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China
Jiao Hu
College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China
Jun Yang
College of Materials and Chemical Engineering, Chongqing University of Arts and Sciences, Yongchuan 402160, China
Chenglun Liu
State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China
Longjun Xu
State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China
Jiankang Wang
Chongqing Key Laboratory of Extraordinary Bond Engineering and Advanced Materials Technology (EBEAM), Yangtze Normal University, Chongqing 408100, China
Yuan Peng
Chongqing Key Laboratory of Extraordinary Bond Engineering and Advanced Materials Technology (EBEAM), Yangtze Normal University, Chongqing 408100, China
Songli Liu
Chongqing Key Laboratory of Extraordinary Bond Engineering and Advanced Materials Technology (EBEAM), Yangtze Normal University, Chongqing 408100, China
Xiuyu Yin
College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China
Yuanzhen Lu
College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China
Magnetic BiOBr/SrFe12O19 nanosheets were successfully synthesized using the hydrothermal method. The as-prepared samples were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), and UV-visible diffused reflectance spectra (UV-DRS), and the magnetic properties were tested using a vibration sample magnetometer (VSM). The as-produced composite with an irregular flaky-shaped aggregate possesses a good anti-demagnetization ability (Hc = 861.04 G) and a high photocatalytic efficiency. Under visible light (λ > 420 nm) and UV light-emitting diode (LED) irradiation, the photodegradation rates of Rhodamine B (RhB) using BiOBr/SrFe12O19 (5 wt %) (BOB/SFO-5) after 30 min of reaction were 97% and 98%, respectively, which were higher than that using BiOBr (87%). The degradation rate of RhB using the recovered BiOBr/5 wt % SrFe12O19 (marked as BOB/SFO-5) was still more than 85% in the fifth cycle, indicating the high stability of the composite catalyst. Meanwhile, after five cycles, the magnetic properties were still as stable as before. The radical-capture experiments proved that superoxide radicals and holes were main active species in the photocatalytic degradation of RhB.
