碳纳米管/Nafion-联吡啶钌修饰的ITO固相电化学发光电极  

A solid-state electrochemiluminescence sensor of carbon fiber microdisk bundle electrode based on carbon nanotube/Nafion-Ru(bpy)_3^(2+) modification

作　　者：张国凡[1] 孙雪梅[1] 

机构地区：[1]青岛科技大学化学与分子工程学院,山东青岛266042

出　　处：《山东理工大学学报（自然科学版）》2011年第4期26-29,共4页Journal of Shandong University of Technology:Natural Science Edition

基　　金：山东省自然科学基金资助项目(ZR2009BM029)

摘　　要：将Nafion膜、多壁碳纳米管和发光试剂联吡啶合钌固定在ITO电极上,制成可以运用到毛细管电泳和微流控芯片电化学发光检测中的微型电致化学发光固定化电极.考察了电极的循环伏安特性、扫描速度对电极发光强度的影响,研究了该电极在检测三丙胺TPA中的电化学发光行为,得到了具有良好重现性的微型碳纳米管/Nafion复合膜修饰ITO电极.实验得到检测TPA的线性范围为(1.0×10-8~5.0×10-6mol.L-1),线性回归系数为0.9986,以电化学发光强度与噪声比值(S/N)为3时得到浓度检测限为2.6×10-9mol.L-1.Carbon nanotube/Nafion-Ru（bpy）32＋ were immobilized on ITO electrode for the solid-state electrochemiluminescence sensor which can be used in capillary electrophoresis or microfluidic chips electrochemiluminescence detection.The cyclic voltammetric characterization of immobilized Ru（bpy）32＋and the effect of scan rate on ECL intensity in phosphate buffer solution have been studied.The ECL behavior of Ru（bpy）32＋immobilized into the CNT/Nafion composite-modified electrode was very good when TPA was detected.The linear range of TPA was 1.0×10-8 ~5.0×10-6 mol L-1.The correlation coefficient of the method was 0.9986.The limit of detection（S/N=3） was 2.6×10-9 mol·L-1.

关 键 词：固相电化学发光传感器 ITO电极 联吡啶钌 修饰电极 

分 类 号：O657.8[理学—分析化学]