氧化锌纳米颗粒光催化降解T-2毒素性能分析  

Photocatalytic Degradation of T-2 Toxin by Zinc Oxide Nanoparticles

作　　者：娄秀萍 黄晴雯 郭文博[2] 刘晓瑾 王欣艺 聂冬霞 韩铮[1,2] LOU Xiuping;HUANG Qingwen;GUO Wenbo;LIU Xiaojin;WANG Xinyi;NIE Dongxia;HAN Zheng(College of Food Sciences&Technology,Shanghai Ocean University,Shanghai 201306,China;The Institute for Agro-food Standards and Testing Technology,Shanghai Academy of Agricultural Sciences,Shanghai 201403,China)

机构地区：[1]上海海洋大学食品学院,上海201306 [2]上海市农业科学院农产品质量标准与检测技术研究所,上海201403

出　　处：《食品科学》2024年第18期10-16,共7页Food Science

基　　金：上海市科技兴农重点攻关项目(2019-02-08-00-12-F01148);上海市青年科技英才扬帆计划资助项目(23YF1439100)。

摘　　要：为了利用光催化技术实现T-2毒素的高效、绿色降解,本研究采用绿色温和的溶剂水热法制备出结晶度高、分散性良好的0D ZnO纳米颗粒光催化材料,并通过高分辨透射电子显微镜、瞬态光电流响应等表征手段对其性质以及光催化降解T-2毒素性能、影响因素和机理进行探究。结果表明:成功制备得到平均粒径约为43.23 nm的ZnO纳米颗粒,经条件优化后可以在240 min内通过光催化降解去除超过95%初始质量浓度为5μg/mL的T-2毒素,降解动力学常数达0.0299μg/(mL·min),催化剂最佳质量浓度为0.5 mg/mL,最佳适用体系的pH值为5~9。光电表征结果确定了ZnO具有良好的光吸收和响应性能以及电荷分离性能,并确定羟自由基在T-2毒素降解中起主导作用。本实验结果可为相关领域绿色高效降解、转化和去除T-2毒素提供有效理论参考和技术支持。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 5μg/mL was removed after photocatalytic degradation with the nanoparticles for 240 min,with a degradation kinetic constant of 0.0299μg/(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.

关 键 词：T-2毒素 光催化降解 ZNO 超高效液相色谱-串联质谱 

分 类 号：TS201.6[轻工技术与工程—食品科学] O643.32[轻工技术与工程—食品科学与工程]