石墨烯修饰的三唑磷分子印迹电化学传感器的制备  

Electrochemical sensor for the determination of triazophos based on graphene modified electrode and molecularly imprinted polymer

作　　者：吴佳雯 谢周鉴 谭学才 胡琪 雷福厚 WU Jia-wen;XIE Zhou-jian;TAN Xue-cai;HU Qi;LEI Fu-hou(School of Chemistry and Chemical Engineering,Guangxi University for Nationalities,Key Laboratory of Guangxi Colleges and Universities for Food Safety and Pharmaceutical Analytical Chemistry,Guangxi Key Laboratory of Chemistry and Engineering of Forest Products,Nanning 530006,China)

机构地区：[1]广西民族大学化学化工学院,广西高校食品安全与药物分析化学重点实验室,广西林产化学与工程重点实验室,广西南宁530006

出　　处：《化学研究与应用》2021年第10期1889-1895,共7页Chemical Research and Application

基　　金：国家自然科学基金项目(21365004)资助;广西重点研发计划项目(桂科AB18126048)资助;广西科技重大专项(桂科AA18118013-10)资助;广西科技基地和人才专项(AD18126005)资助;广西高校中青年教师基础能力提升项目(2017KY0164)资助;广西民族大学科研基金项目(青年基金项目,2018MDQN004)资助。

摘　　要：采用石墨烯作为电极增敏材料,制备三唑磷(TAP)分子印迹电化学传感器。采用自由基聚合法,在石墨烯修饰电极(GR/GCE)上合成分子印迹聚合物膜(MIP)。利用微分脉冲伏安法、电化学阻抗谱对不同修饰电极进行电化学表征,利用微分脉冲伏安法考察了MIP和非分子印迹聚合物膜(NIP)传感器的电化学性能。在最优实验条件下,TAP浓度在1.0×10^(-7)~2.0×10^(-5) mol·L^(-1)内和MIP膜传感器峰电流呈线性关系,检出限为4.3×10^(-8) mol·L^(-1)(S/N=3)。建立MIP膜传感器的动力学吸附模型,测得结合速率常数k为9.0580 s。The electrochemical sensor for the determination of triazophos was prepared by using graphene as the sensitizing material.A molecularly imprinted polymer(MIP)film was created on a graphene-modified electrode for the determination of triazophos using a free radical polymerization method.The electrochemical characterization of different modified electrodes was performed by differential pulse voltammetry and electrochemical impedance spectroscopy.The electrochemical properties of the MIP and non-molecularly imprinted polymer(NIP)sensors were investigated by differential pulse voltammetry.Under optimal detection conditions,the DPV peak current showed a linear relationship with the concentration of triazophos,the linear range was 1.0×10^(-7)~2.0×10^(-5) mol·L^(-1),the detection limit was 4.3×10^(-8) mol·L^(-1)(S/N=3).Absorption model of the sensor was established,the binding rate constant was 9.0580.

关 键 词：三唑磷 石墨烯 分子印迹电化学传感器 

分 类 号：O657.1[理学—分析化学]