基于CeO2/ERGO/SiO2复合膜修饰电极的制备及应用  

The preparation of CeO2/ERGO/SiO2/CPE chemical modified electrode and the electrocatalysis for phenol

作　　者：金君 柯娟 于浩 刘晓莉 JIN Jun;KE Juan;YU Hao;Liu Xiao-li(College of Chemistry and Enginerring,Yan'an University,Yan'an Key Laboratory of Analytical Technology and Detection,Yan'an Shaanxi 716000)

机构地区：[1]延安大学化学与化工学院延安市分析技术与检测重点实验室

出　　处：《分析试验室》2019年第12期1440-1443,共4页Chinese Journal of Analysis Laboratory

基　　金：陕西省教育厅科研计划项目(17JS139);陕西省科技计划项目(2018JM2053);大学生创新训练项目(D2018028)资助

摘　　要：采用三步化学合成法制备了二氧化铈/还原氧化石墨烯/二氧化硅球(CeO2/ERGO/SiO2)复合纳米粒子,用X-射线粉末衍射(XRD)技术对其进行了表征,并用于修饰电极(CeO2/ERGO/SiO2/CPE)的制备,研究了修饰电极的电化学行为及其对苯酚的电催化活性。在最优实验条件下,苯酚的浓度在0.2~143μmol/L范围内,与峰电流呈良好的线性关系,线性方程为i(μA)=-4.00 c(μmol/L)-16.77,检出限为0.1μmol/L。方法用于实际样品延河水中苯酚含量的测定,样品回收率在97.0%~102.8%之间。The CeO2/ERGO/SiO2 composite nanoparticles were prepared by three-step chemical synthesis method,characterized by X-ray diffraction technology(XRD)and used to prepare modified electrodes(CeO2/ERGO/SiO2/CPE).The electrochemical behavior of the modified electrodes and their electrocatalytic activities for phenol were studied.Under the optimum experimental conditions,the concentration of phenol in the range of 0.2-143μmol/L has a good linear relationship with peak current.The linear equation is i(μA)=-4.00 c(μmol/L)-16.77,with the detection limit of 0.1μmol/L.The method has been applied for the determination of phenol content in Yan-he River water with the recoveries of spiked samples between 97.0%and 102.8%.

关 键 词：苯酚 二氧化铈 氧化石墨烯 二氧化硅球 

分 类 号：O657.1[理学—分析化学]