氧化锌纳米颗粒光催化降解T-2毒素性能分析OA北大核心CSTPCD

In this study,ZnO nanoparticles with high crystallinity and good dispersibility for efficient and green photocatalytic degradation of T-2 toxin were successfully prepared by a green and mild solvent hydrothermal method.The properties and T-2 toxin degrading performance of the nanoparticles were characterized by high-resolution transmission electron microscopy(HRTEM)and transient photocurrent response(TPR),and the factors affecting the T-2 toxin degrading performance and the underlying mechanism were explored.The results showed that the average particle size of the prepared nanoparticles was 43.23 nm.Under optimized conditions,more than 95%of T-2 toxin at an initial concentration of 5 μg/mL was removed after photocatalytic degradation with the nanoparticles for 240 min,with a degradation kinetic constant of 0.029 9 μg/(mL·min).The optimal catalyst dose was 0.5 mg/mL,and the optimal pH was 5-9 for the degradation of T-2 toxin.The photoelectric characterization confirmed the excellent optical absorption,response and charge separation performance of the ZnO nanoparticles and identified hydroxyl radicals to play a dominant role in T-2 toxin degradation.The current work provides an effective theoretical basis and technical support for the green and efficient degradation,conversion and removal of T-2 toxin.