Construction of CeO2/BiOBr heterojuction for photocatalytic degradation of Rhodamine B
GUO Tian-yu1,2, FAN Xiang-rui1, BAI De-hao3, QI Yu1, WANG Hong-Tao1
1. College of Environment Science and Engineering, Taiyuan University of Technology, Jinzhong 030600, China; 2. Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization, Taiyuan 030024, China; 3. Xinzhou Branch of Petrochina Coalbed Methane Co. LTD, Xinzhou 036600, China
Abstract:In this study, CeO2, BiOBr and CeO2/BiOBr photocatalysts were synthesized by a hydrothermal method, and the morphology, structure and photoelectrochemical properties of the photocatalysts were characterized by different techniques. The photocatalytic performance was evaluated by degrading Rhodamine B (RhB) under visible light irradiation. The experimental results showed that the CeO2/BiOBr (CB-10) catalyst with the appropriate amount of CeO2 (10%) exhibited enhanced photocatalytic activity, recyclability and cycling stability and the degradation rate of RhB reached 99% within 30min. Furthermore, the catalyst attained the highest degradation efficiency (96.1%) within 20min when the catalyst dosage was 0.5g/L, the RhB concentration was 20mg/L and pH value was 3. The possible reaction mechanism of CeO2/BiOBr heterojunctional material in photocatalytic process was proposed based on the radical capture test and the energy band structure of material. This study can provide a new idea and method for the preparation of Bi-based composite catalysts.
郭天宇, 范祥瑞, 白德豪, 祁彧, 王红涛. 异质结CeO2/BiOBr的构筑及其光催化降解罗丹明B[J]. 中国环境科学, 2023, 43(11): 5845-5854.
GUO Tian-yu, FAN Xiang-rui, BAI De-hao, QI Yu, WANG Hong-Tao. Construction of CeO2/BiOBr heterojuction for photocatalytic degradation of Rhodamine B. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(11): 5845-5854.
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