功能纳米材料电化学传感平台的构建及用于农药残留的检测

农药在农业生产和病虫害防控方面发挥着重要作用，但是不合理的使用农药导致的农药残留问题已给人类生存的环境和自身健康带来了巨大的危害，因此，建立准确、快速、灵敏的农药残留检测方法至关重要。本研究拟采用量子点、贵金属纳米颗粒、磁性纳米和碳纳米四种功能纳米材料复合修饰电极，结合电化学分析技术构建电化学传感平台检测农药残留。利用扫描电镜等设备对复合纳米材料的形貌、粒径和功能特点等参数进行表征分析，考察不同组成及配比浓度复合材料修饰电极时对生物传感器性能的影响，并对传感器的响应特性、抗干扰特性、重现性、选择性、线性范围和检出限等进行系统的评价与优化，筛选出性能优良的生物传感器，全方位构建电化学传感平台。该传感平台具有灵敏度高、选择性好、应用范围广等优点，可用于多种农药残留的检测，对保护人类健康具有重要意义。同时本项目的研究为农药残留的现场快速检测提供了新思路和新方法，具有一定的商业应用前景。

Pesticide, as we know, is of great importance in production and security of agricultural and pest control, however, pesticide residues which caused by unreasonable application of pesticides have brought great harm to human survival environment and their own health. So it is critical to manufacture a reliable sensitive and fast pesticide residue determination method. This project will fabricate an electrochemical sensor platform to detect pesticide residues which combine electrochemical analysis techniques and quantum dots, precious metal nanoparticles, magnetic nanomaterials and carbon nanotubes modified electrodes. This project intends to sreen out excellent performance of the biosensor and construct the electrochemical sensing platform by using scanning electron microscopy (SEM) and other instruments of the composites to charactering its composites, morphology, size and function to explore the impact of different composition or the concentration ratio of composite material modified electrodes on the performance of the biosensor, meanwhile evaluating and optimizing comprehensively the response, anti-interference characteristics, reproducibility, selectivity, linearity range and detection limit of sensor. The sensor platform with the advantage of high sensitivity, good selectivity, wide range of applications may be used to detect pesticide residues and is of great significance for the protection of human health. At the same time this research project provides new methods and ideas for on-site rapid detection of pesticide residues and has broad commercial applications.