共价有机骨架材料修饰碳糊电极电化学检测铜离子  

Electrochemical detection of copper ions with covalent organic frame material modified carbon paste electrode

作　　者：辛宇 刘相局 王春丽 刘娜珍 蒋全通 段继周[1,3] XIN Yu;LIU Xiangju;WANG Chunli;LIU Nazhen;JIANG Quantong;DUAN Jizhou(Key Laboratory of Marine Environment Corrosion and Bio-Fouling,Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China;University of Chinese Academy of Sciences,Beijing 100049,China;Open Studio for Marine Corrosion and Protection,Pilot National Laboratory for Marine Science and Technology(Qingdao),Qingdao 266237,China;Research Center for Analytical Sciences,Department of Chemistry,College of Sciences,Northeastern University,Shenyang 110819,China)

机构地区：[1]中国科学院海洋研究所海洋环境腐蚀与生物污损重点实验室,青岛266071 [2]中国科学院大学,北京100049 [3]青岛海洋科学与技术试点国家实验室,海洋腐蚀与防护开放工作室,青岛266237 [4]东北大学理学院化学系分析科学研究中心,沈阳110819

出　　处：《分析试验室》2023年第9期1199-1204,共6页Chinese Journal of Analysis Laboratory

基　　金：青岛市博士后应用项目资助。

摘　　要：利用溶剂热反应合成共价有机骨架材料TpBD-COF,通过扫描电子显微镜和红外光谱表征其形貌和结构。按照一定比例将石墨粉、TpBD-COF、离子液体(BPPF_(6))和石蜡油混合研磨,制备COF-2-BPPF6-CPE碳糊电极,采用循环伏安法(CV)和差分脉冲伏安法(DPV)评估修饰电极的电化学性能。在pH 3.50的邻苯二甲酸氢钾缓冲溶液中,Cu^(2+)在修饰电极上有灵敏的电流响应。COF修饰碳糊电极对Cu^(2+)有更高的峰电流,且峰电流与Cu^(2+)浓度在1~200μmol/L呈线性关系(R^(2)=0.9997),检出限为0.13μmol/L。利用该修饰电极,采用标准加入法对水样中的Cu^(2+)进行测定,回收率为100.6%~101.2%,表明其可用于检测水体中的Cu^(2+)。The covalent organic framework material TpBD-COF was synthesized by solvothermal reaction,and characterized using scanning electron microscopy and Fourier transform infrared spectroscopy.Then,COF-2-BPPF6-CPE was prepared by mixing TpBD-COF,carbon paste and ionic liquid[BPPF6]in a certain proportion,and the electrochemical performance of the working electrode was evaluated by cyclic voltammetry(CV)and differential pulse voltammetry(DPV).Copper ions can be sensitively responded on the modified electrode in a buffer solution of potassium hydrogen phthalate at pH 3.50.The results showed that the COF modified carbon paste electrode had higher peak current for copper ion,and the peak current was linearly related to the molar concentration of copper ion in the range of 1 to 200μmol/L,with a linear correlation coefficient(R^(2))of 0.9997.The detection limit was 0.13μmol/L.The modified electrode showed excellent selectivity,stability and reproducibility.The standard addition method was used for the determination of copper ions in water samples with recoveries in the range of 100.6%-101.2%.These results suggested that COF modified carbon paste electrodes can be applied to detect copper ions in water samples.

关 键 词：共价有机骨架 碳糊电极 金属储罐 铜离子 

分 类 号：O657.1[理学—分析化学] O646.6[理学—化学]