新型多壁碳纳米管/白藜芦醇印迹溶胶-凝胶层层组装电化学传感器研究  

Novel Layer-by-layer Assembly Multi-walled Carbon Nanotube/Resveratrol Imprinted Sol-gel Electrochemical Sensor

作　　者：张朝晖[1,2] 胡宇芳[1] 张华斌[1] 曹娇[1] 姚守拙[2] 

机构地区：[1]吉首大学化学化工学院,吉首416000 [2]湖南大学化学传感与计量国家重点实验室,长沙410082

出　　处：《化学学报》2010年第5期431-436,共6页Acta Chimica Sinica

基　　金：湖南省自然科学基金(No.08JJ4004);湖南省教育厅优秀青年项目(No.07B061);化学生物传感与计量国家重点实验室开放基金(No.2008007);吉首大学研究生校级课题(No.09JDY007)资助项目

摘　　要：采用电化学沉积方法将印迹溶胶-凝胶膜沉积到功能化碳纳米管(MWNT-COOH)修饰的碳电极表面,成功研制一种新型多壁碳纳米管/白藜芦醇印迹溶胶-凝胶电化学传感器.采用扫描电镜(SEM),循环伏安法(CV),方波伏安法(SWV)和计时电流法(i-t)详细考察该印迹溶胶-凝胶膜的形态和电化学性能.结果表明该传感器对白藜芦醇具有较高的选择性和亲和性.与无多壁碳纳米管修饰的印迹传感器比较,MWNT层修饰的印迹传感器电流响应信号明显提高.白藜芦醇与印迹溶胶-凝胶膜的特异性结合使该传感器的电流发生变化,电流变化与白藜芦醇浓度在5.0×10-7～8.0×10-5mol?L-1范围内呈良好线性关系,检测限为5.1×10-8mol?L-1,该传感器成功应用于葡萄酒中白藜芦醇含量的检测.Thin film of molecularly imprinted sol-gel polymers with specific binding sites for resveratrol and a multi-wall carbon nanotube（MWNT） layer was cast on a carbon electrode by combining electrochemical imprinted deposition with layer-by-layer assembly technology.A novel kind of composite multi-walled carbon nanotube/sol-gel imprinted electrochemical sensor for the determination of resveratrol was developed.The performance of the imprinted film was characterized by cyclic voltammetry（CV）, square wave voltammetry（SWV） and amperometric i-t curve.Scanning electron microscopy（SEM） was employed to observe the morphology of the imprinted film.Results suggested that the imprinted film exhibited high selectivity and affinity toward resveratrol.The linear range of the imprinted electrode was over the range from 5.0×10-7 to 8.0×10-5 mol？L-1, and the limit of detection was 5.1×10-8 mol？L-1.Finally, the imprinted sensor was employed to detect resveratrol in grape wine successfully.

关 键 词：印迹溶胶-凝胶 多壁碳纳米管 层层组装 电化学传感器 电沉积 

分 类 号：TP212.2[自动化与计算机技术—检测技术与自动化装置]