A dual Z-scheme PANI/BiOBr/ZnFe2O4 photocatalyst with excellent photocatalytic redox activity for organic pollutant under visible-light
HAN Qiong1, CAO Wen-quan1, ZHU Chao1, ZHANG Rui2
1. Sinopec Guangyuan Natural Gas Purification Co., Ltd., Guangyuan 628400, China; 2. College of Chemistry & Chemical Engineering, Southwest Petroleum University, Chengdu 610500, China
Abstract: Polyaniline/bismuth bromide/zinc ferrite (PANI/BiOBr/ZnFe2O4) composite photocatalyst is rationally designed and successfully prepared via a facile hydrothermal synthesis method.The crystal structure and morphology of the samples are analyzed by various characterization techniques.It is shown that PANI/BiOBr/ZnFe2O4 composite photocatalyst exhibits higher photocatalytic activity under visible light irradiation than other samples.The highest degradation efficiency of rhodamine B (RHB) over PANI/BiOBr/ZnFe2O4 can reach 99.26%.Meanwhile,the composite photocatalyst exhibits an excellent catalytic activity for the reduction of nitrobenzene (NB) under visible light,with a conversion efficiency of 87.1%.Additionally,according to PL spectra and electrochemical impedance spectroscopy (EIS) analysis,it can be concluded that the improved photocatalytic performance of PANI/BiOBr/ZnFe2O4 composite can be attributed to the rapid separation and transfer of electron-hole pairs.The dual Z-scheme electron transfer mechanism suitable for this system is proposed by means of UV-Vis DRS spectra,M-S curves analysis,ESR spectra and free radical capture experiments.
韩琼, 曹文全, 朱超, 张瑞. 双Z型PANI/BiOBr/ZnFe2O4光催化剂在可见光下对有机污染物的光催化降解和氧化还原活性研究[J]. 现代化工, 2022, 42(1): 206-212,217.
HAN Qiong, CAO Wen-quan, ZHU Chao, ZHANG Rui. A dual Z-scheme PANI/BiOBr/ZnFe2O4 photocatalyst with excellent photocatalytic redox activity for organic pollutant under visible-light. Modern Chemical Industry, 2022, 42(1): 206-212,217.
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