基于纳米铜-碳纳米纤维复合材料的电化学传感器检测芦丁  

Detection of Rutin Using an Electrochemical Sensor Based on Cu Nanoparticles-Carbon Nanofibers Nanocomposites

作　　者：张亚[1] 焦玉荣[1] 邢艳[1] 张涛 Zhang Ya;Jiao Yurong;Xing Yan;Zhang Tao(.Department of Chemistry and Chemical Engineering,Yulin College,YuLin,Shaanxi 719000,China)

机构地区：[1]榆林学院化学与化学工程学院,陕西榆林719000

出　　处：《化学世界》2021年第8期479-485,共7页Chemical World

基　　金：国家自然科学基金(No.51762042);陕西省科技厅(No.2020JM-627);榆林市科技局(Nos.2019-102-2、2019-83-3)资助项目。

摘　　要：采用化学还原法制备了纳米铜-碳纳米纤维复合材料(CuNPs-CNFs),将其修饰在玻碳电极表面制备了一种检测芦丁的电化学传感器。在铁氰化钾-亚铁氰化钾体系中,采用电化学阻抗法和循环伏安法考察了传感器的电化学响应,研究了传感器的电化学性能;采用扫描电镜研究了传感器的表面形貌。在0.067 mol/L Na2HPO4-NaH2PO4(pH=7.0)缓冲溶液中,采用循环伏安法研究了芦丁在传感器上的电化学行为,结果表明,传感器对芦丁的氧化还原反应有较好的电催化作用。在优化实验条件下,用微分脉冲伏安法测得芦丁的还原峰电流与其在5.0×10_(-9)~5.0×10^(-6) mol/L浓度范围内呈线性关系,检出限为3.0×10^(-9) mol/L,该传感器具有较好的重现性和稳定性,可用于芦丁片剂和槐米中芦丁含量的测定。A Cu nanoparticles-carbon nanofibers(CuNPs-CNFs) composite nanomaterial was prepared by redox reaction. An electrochemical sensor for the detection of rutin was fabricated by immobilizing CuNPs-CNFs on the surface of glass carbon electrode. The electrochemical performance of the sensor was investigated by cyclic voltammetry and electrochemical impedance spectroscopy in potassium ferricyanide-potassium ferrocyanide system. The surface morphology of the sensor was studied by scanning electron microscopy. The electrochemical behavior of rutin at the sensor was investigated in 0.067 mol/L pH 7.0 phosphate buffer solution by cyclic voltammetry. The results show that the sensor has a good electrocatalytic activity to redox reaction of rutin. Under optimized experimental conditions, a linear dependence of reductive peak current versus rutin concentration was obtained in the range of 5.0×10^(-9)~5.0×10^(-6) mo1/L by differential pulse voltammetry, with a detection limit of 3.0×10^(-9) mo1/L. The sensor shows excellent stability and repreducibility. The method can be used for the determination of rutin in tablets and flos sophorae.

关 键 词：芦丁 纳米铜 碳纳米纤维 电催化 

分 类 号：O657.1[理学—分析化学]