Citation: Shui-Sheng WU, Bing YI, Ran WANG, Dong-Hui LAN, Nian-Yuan TAN. Enhancing Photocatalytic Performance of Flower-like BiOBr for Degradation of Rhodamine B by ZnO Modification[J]. Chinese Journal of Inorganic Chemistry, ;2022, 38(2): 211-219. doi: 10.11862/CJIC.2022.029 shu

Enhancing Photocatalytic Performance of Flower-like BiOBr for Degradation of Rhodamine B by ZnO Modification

1.
Hunan Provincial Key Laboratory of Environmental Catalysis & Waste Regeneration, School of Materials and Chemical Engineering, Hunan Institute of Engineering, Xiangtan, Hunan 411104, China
2.
School of Management, Hunan Institute of Engineering, Xiangtan, Hunan 411104, China

Corresponding author: Bing YI, bingyi2004@126.com
Received Date: 19 March 2021
Revised Date: 31 August 2021

Figures(9)

BiOBr/ZnO three-dimensional flower-like nanocomposite with enhanced photocatalytic ability were prepared by simple solvothermal method applying Bi(NO₃)₃·5H₂O, Zn(CH₃COO)₂·2H₂O and NaBr as precursors. The physical and chemical attributes were characterized by various analytical techniques such as X-ray diffraction, scanning electron microscope, X-ray photon spectroscopy, N₂ adsorption-desorption, UV-Vis diffusion reflectance spectroscopy, photoluminescence and electron paramagnetic resonance (EPR). The main crystalline structure of BiOBr is not destroyed after doping, but growth of BiOBr crystals is lightly inhibited by doping ZnO. The trapping agent experiment and EPR spectra show that ·O^2- and ·OH are the main active species in the process of photocatalytic degradation. The photocatalytic activities of the composite were evaluated by the degradation of rhodamine B (RhB) under visible light. The results showed that BiOBr/ZnO with 5% ZnO had the best photocatalytic activity, and the degradation rate of RhB reached 98.3% after 50 min of irradiation. Its degradation rate constant was 6.3 times and 3.4 times higher than those of pure ZnO and BiOBr, respectively. The introduction of ZnO enhances the absorption of visible light and the charge separation efficiency of photogenerated carriers.
- BiOBr,
- ZnO,
- solvothermal method,
- photocatalysis,
- carriers separation
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