期刊
CERAMICS INTERNATIONAL
卷 45, 期 8, 页码 10468-10474出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2019.02.108
关键词
Mn-Zn ferrite; BiOI; Photocatalytic activity; Nanocomposites; Magnetic photocatalyst
资金
- Science and Technology Fund Project of Guizhou Province [[2018]1415]
- Youth Talent Growth Project of Education Department of Guizhou Province [KY[2017]264]
- 2011 Collaborative Innovation Center of Guizhou Province [[2016]02]
- Provincial Key Disciplines of mining engineering [ZDXK[2015]9]
- Basic Research Program of Education Committee of Chongqing City [KJ1503107]
- Scientific and Technological Research Program of the Chongqing Municipal Education Commission [KJ1711286/KJ1711266]
- Chongqing Basic Science and Advanced Technology Research Program [CSTC2018jcyjAX0426]
BiOI/MnxZn1-xFe2O4 magnetic photocatalysts were successfully prepared for the first time. With the degradation of simulated RhB wastewater as a pointer to the photocatalytic reaction and combined with Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), UV-visible diffuse reflectance spectroscopy (UV-vis DRS), and vibrating sample magnetometer (VSM), the reasons influencing the photocatalytic performance of the magnetic photocatalysts were further explored. The excessive or insufficient Mn-Zn ferrite both leads to a relatively low photocatalytic activity. When the calcination temperature reaches to 200 and 400 degrees C, the photocatalytic activity is enhanced significantly, but the main active component in the photocatalysts has changed from BiOI to Bi5O7I at 400 degrees C. The nanocomposites prepared under alcohol water environment with hollow microspheres morphology possess a highly photocatalytic efficiency, and the RhB degradation rate within 4 h in the ethanol water environment is significantly higher than that in pure water (98% vs. 59%).
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