基于Fe_3O_4@Ag壳核结构磁性纳米复合物的杀螟硫磷电化学传感  

A Sensitive Electrochemical Sensor of Fenitrothion Based on Fe_3O_4@Ag Nanoparticles

作　　者：吴伟平[1] 周洁[1] 方玉婷[1] 刘扬[1] 顾海鹰[1] 

机构地区：[1]南通大学公共卫生学院,南通226019

出　　处：《化学通报》2016年第11期1041-1045,1057,共6页Chemistry

基　　金：国家自然科学基金项目(21475070;21175075;20875051;20675042;81202249)资助

摘　　要：制备了一种核壳结构的磁性纳米粒子Fe_3O_4@Ag,将该纳米粒子通过壳聚糖(CS)修饰到玻碳电极(GCE)表面,构建了杀螟硫磷电化学传感器,研究了传感器的电化学和电催化行为,建立了杀螟硫磷测定的电分析新方法。应用透射电镜和紫外可见光谱对Fe3O4@Ag纳米粒子进行表征。研究发现,该传感器对杀螟硫磷有很好的电催化作用,其峰电流与浓度在1.74×10^(-7)~3.27×10^(-4)mol/L范围内呈线性关系,相关系数为R^2=0.9871,检出限为5.7×10^(-8)mol/L(S/N=3)。该传感器有望用于杀螟硫磷的检测。Abstract A sensitive electrochemical sensor for detecting fenitrothion was prepared by modifying Fe3O4@ Ag core/shell nanoparticles on GCE by CS, and its electrochemical properties and electric catalytic behavior were studied. The Fe3O4@ Ag magnetic nanoparticles were characterized by TEM and UV-Vis spectra. The results showed that the modified GCE responsed to fenitrothion within the linear range of 1.74 × 10 ^-7 -3.27× 10^-4 mol/L, and the lower limit of detection was 5.7×10^-8 mol/L （ S/N = 3）. The sensor is expected to be used in the detection of fenitrothion

关 键 词：Fe3O4@ AG 磁性纳米粒子 电化学传感器 杀螟硫磷 

分 类 号：O657.1[理学—分析化学]