【作者】 张兵；

【导师】 王志华； 卢小泉；

【作者基本信息】 西北师范大学 ， 无机化学， 2020， 硕士

【摘要】 农药的使用增加了农作物产量,对提高粮食产量和解决人类温饱问题起到了重要的作用。与此同时,农药的残留对人类健康产生了潜在的威胁。所以,开发简单快速的农药残留物检测方法具有一定的价值。此篇论文通过纳米材料、分子印迹技术和电化学分析技术等,得到了几种农药分子印迹伏安传感器。主要研究工作如下:1.将多壁碳纳米管、纳米金作为修饰材料,噻虫嗪(TMX)农药分子作为印迹分子,对巯基苯胺作为功能基修饰单体,研制了一种噻虫嗪分子印迹伏安传感器。利用电化学技术、光化学技术和扫描电子显微镜等手段,对传感器的性能进行了优化。最后利用此传感器检测了实际样品青枣内的TMX,得到的数据结果相对满意,说明制得的传感器可用于实际样品中噻虫嗪的测定。2.将聚乙烯亚胺处理过的多壁碳纳米管、纳米金作为修饰材料,吡虫啉(IMI)农药分子作为印迹分子,4-氨基苯硫酚和邻苯二胺两种单体作为功能基修饰体,研制了一种吡虫啉分子印迹伏安传感器。利用电化学技术、光化学技术和扫描电子显微镜等手段,分析了此传感器的相关性能。最后利用此传感器检测了实际样品番茄内的IMI,分析测定的数据良好,说明制得的传感器可用于实际样品中吡虫啉的测定。3.将聚乙烯亚胺处理过的多壁碳纳米管、纳米金和纳米铂作为修饰材料,2,4-二氯苯氧乙酸为印迹分子,巯基苯胺和邻苯二胺作为功能基修饰体,研制出一种2,4-二氯苯氧乙酸分子印迹伏安传感器。利用电化学技术、光化学技术和扫描电子显微镜等手段,对2,4-二氯苯氧乙酸印迹传感器的相关性能进行了探究。最后利用此传感器检测了实际样品黄瓜内的2,4-二氯苯氧乙酸,得到了良好的数据分析结果,说明制得的传感器可用于实际样品中的2,4-二氯苯氧乙酸的测定。更多还原

【Abstract】 The use of pesticides has increased crop yields and played an important role in increasing food yields and solving the problem of human food and clothing.At the same time,pesticide residues pose a potential threat to human health.Therefore,the development of simple and rapid pesticide residue detection methods has certain value.In this paper,several pesticide molecularly imprinted voltammetric sensors have been obtained through nanomaterials,molecular imprinting technology and electrochemical analysis technology.The main research work is as follows:1.A thiamethoxam molecularly imprinted voltammetric sensor was developed.Using multi-walled carbon nanotubes and gold nanoparticles as modified materials,thiamethoxam(TMX)pesticide molecules as imprinted molecules,and p-mercaptoaniline as functional group modification monomers.Using electrochemical technology,photochemical technology,scanning electron microscope and other means,the performance of the sensor was optimized.Finally,the sensor was used to detect the TMX in the actual sample of green jujube,and the data obtained was relatively satisfactory,indicating that the prepared sensor can be used for the determination of thiamethoxam in the actual sample.2.Gold nanoparticles and multi-walled carbon nanotubes treated with polyethyleneimine are used as modified materials,imidacloprid(IMI)pesticide molecules are used as imprinting molecules,and two monomers,4-aminothiophenol and o-phenylenediamine,are used as functional group modifiers.Developed an imidacloprid molecularly imprinted voltammetric sensor.Using electrochemical technology,photochemical technology and scanning electron microscope and other means,the relevant performance of this sensor is analyzed.Finally,the sensor was used to detect the IMI in the actual sample tomato,and the analyzed and measured data was good,indicating that the prepared sensor can be used for the determination of imidacloprid in the actual sample.3.Gold nanoparticles,platinum nanoparticles and multi-walled carbon nanotubes treated with polyethyleneimine were used as modified materials,2,4-dichlorophenoxyacetic acid was used as imprinting molecules,and mercaptoaniline and o-phenylenediamine were used as functional group modifications.A 2,4-dichlorophenoxyacetic acid molecularly imprinted voltammetric sensor was developed.Using electrochemical technology,photochemical technology and scanning electron microscope and other means,the relevant performance of 2,4-dichlorophenoxyacetic acid imprinted sensor was explored.Finally,the sensor was used to detect the 2,4-dichlorophenoxyacetic acid in the actual sample cucumber,and good data analysis results were obtained,indicating that the prepared sensor can be used for the determination of 2,4-dichlorophenoxyacetic acid in the actual sample.更多还原