Abstract
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.
基金项目
National Natural Science Foundation of China(21471103)
National Natural Science Foundation of China(52372212)
万方数据