基于多壁碳纳米管负载金纳米粒子修饰的甲基对硫磷分子印迹电化学传感器的研制

Development of Methyl Parathim Molecularly Imprinted Electrochemical Sensors Based on Multi-Walled Carbon Nanotubes Supported Gold Nanoparticles

本文以四氨基苯硫酚作为功能单体、甲基对硫磷(MP)作为模板分子,通过电聚合的方法在多壁碳纳米管负载金纳米粒子修饰的玻碳电极表面成功构建了MP分子印迹电化学传感器。借助循环伏安、电化学阻抗和差示脉冲等方法对传感器的电化学性能、选择性、稳定性以及重现性进行了研究。并将所建立的方法应用于黄河水中MP的加标回收检测,结果令人满意。该方法无需进行预处理,选择性好、灵敏度高、重现性好,为分析检测MP分子提供了一种非常有效的方法。

The methyl parathion molecularly imprinted electrochemical sensor was constructed based on WMCNTs and Au NPs,with tetramethylthiophenol（p-ATP） as functional monomer and methyl parathion（MP） as template molecule by electrochemical polymerization method. The electrochemical performance, selectivity,reproducibility and stability of the sensor were studied by cyclic voltammetry（CV）,electrochemical impedance spectroscopy（EIS） and differential pulse method（DPV）. The prepared sensor was used to measure MP in the Yellow River sample with satisfactory results. This method has the advantages of easy preparation,good selectivity,high sensitivity and good reproducibility. It provides a very effective method for analysis of methyl parathion（MP）.