首页|Construction of Z-scheme Cu-CeO2/BiOBr heterojunction for enhanced photocatalytic degradation of sulfathiazole
Construction of Z-scheme Cu-CeO2/BiOBr heterojunction for enhanced photocatalytic degradation of sulfathiazole
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The utilization of an efficient photocatalyst is crucial for the photocatalytic degradation of antibiotics in water through visible light,which is an imperative requirement for the remediation of water environ-ments.In this study,a novel Cu-CeO2/BiOBr Z-type heterojunction was synthesized by calcination and hydrothermal methods,and the degradation rate of sulfathiazole(STZ)antibiotic solution was studied using simulated illumination(300 W xenon lamp).The results indicated that 3％ Cu-CeO2/BiOBr achieved a degradation rate of 92.3％ within 90 min when treating 20 mg/L STZ solution,demonstrating its poten-tial for practical water treatment applications.Characterization using various chemical instruments re-vealed that 3％ Cu-CeO2/BiOBr exhibited the lowest electron-hole recombination rate and electron trans-fer resistance.Furthermore,the utilization of ESR data and quenching experiments has substantiated the involvement of hydroxyl radicals(·OH)and superoxide radicals(·O2-)as the primary active species.Con-sequently,a plausible degradation mechanism has been inferred.These findings offer a prospective ap-proach for the development of heterojunction materials with appropriate band matching.
College of Environmental Sciences and Engineering,Nankai University,Tianjin 300350,China
Laboratory for Micro-Sized Functional Materials&College of Elementary Education and Department of Chemistry,Capital Normal University,Beijing 100048,China
College of Environmental Sciences and Engineering,The Key Laboratory of Water and Sediment Sciences(MOE),Peking University,Beijing 100871,China
National Natural Science Foundation of ChinaNational Natural Science Foundation of China
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