目录
摘要 II
关键词 II
Abstract III
引言
引言 1
1 材料与方法 7
1.1 仪器及试剂 7
1.2 实验流程 8
1.3 CuO NTs光阴电极的制备 9
1.3.1 实验材料 9
1.3.2 制备方法及实验现象 9
1.4 CuO NPs光阴电极的制备 9
1.4.1 实验材料 9
1.4.2 制备方法 9
1.5 不同pH条件下硝磺草酮的测定 9
1.5.1 实验材料 9
1.6 数据处理 10
2 实验结果分析 10
2.1 CuO NPs光阴电极的性能分析 10
2.1.1 形貌表征 10
2.1.2 紫外可见吸收光谱（UVvis）表征 11
2.1.3 X射线衍射表征 11
2.1.4 光电性能及稳定性表征 12
2.2不同pH条件下硝磺草酮的测定结果分析 12
3 总结与讨论 14
4 展望 14
致谢 15
参考文献 16
基于阴极纳米材料的光电化学农药残留检测研究
摘要
当前，随着农业的发展，不同种类农药的使用量也达到了新的高度，农药残留所带来的环境污染问题不容忽视，急需开发新型针对农药残留的分析检测技术。光电化学（PEC）技术作为是PEC过程与电化学分析技术的有机结合体，将二者优势相结合，具有背景噪声低、灵敏度高等优点，已成为快速、准确检测各种污染物的候选方法之一，现也可用于农药残留物的分析检测。光电活性材料作为PEC传感器中不可缺少的一部分，其性能优劣对于所构建出的PEC检测器有着决定性的影响。在目前被开发出的多种光电材料中，相比于阳极纳米光电材料，阴极纳米光电材料具有抗干扰能力强等特殊优势。利用其与农药分子间相互作用及其对光电信号影响的规律可建立光电化学农药残留检测新方法。本实验以选择性除草剂硝磺草酮作为目标检测物，制备CuO纳米颗粒（CuO NPs）作为阴极光电材料并将其用于硝 *51今日免费论文网|www.51jrft.com +Q: ^351916072^ 
磺草酮的光电化学检测中，且在实验过程中不断优化制备和检测条件，建立了硝磺草酮检测新方法，也为相关农药残留检测提供了新思路。
CATHODIC PHOTOELECTROCHEMICAL ANALYSIS OF PESTISIDE RESIDUE
ABSTRACT
With the development of modern agriculture, the application of pesticides has become an indispensable strategy. However, their abusive usage has caused various problems in terms of human health, food safety and environmental protection. Thus, developing rapid and facile detection methods for pesticides residue is of great significance. Photoelectrochemical (PEC) technology is an exquisite combination of PEC process and electrochemical technology. PEC analysis inherits the feature of high sensitivity from electrochemical analysis, and due to the different energy form of excitation source and measurement signal, it also possesses the character of low background. In the past decades, it has become one of the candidate methods for rapid and accurate detection of various pollutants, especially for pesticide residues. Photoactive materials, which convert light signal to electrical signal, play the fundamental role in PEC sensors, and have a great impact on the sensing stability and accuracy. Among all kinds of photoelectric materials, compared with anodic photoactive materials, the cathodic photoactive materials reacted with oxidative species rather than reductive species, thus able to resist influence from common reductive interferent, resulting in its advantage in practical analysis. In this experiment, the cathodic photoactive material CuO nanoparticles (CuO NPs) were fabricated via electrodeposition method and used in PEC detection of mesotrione based on the coordinative interaction between Cu (II) and mesotrione. During the experiment, the preparation and detection conditions were optimized, and the analyzation method of mesotrione was established. This work opened a new way for facile and rapid detection of pesticide residues.

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