Schiff碱铜配合物/多壁碳纳米管修饰电极的制备及其电催化作用  

Electrocatalytic Oxidation of Ascorbic Acid at Glassy Carbon Electrode Modified by Multi-Wall Carbon Nanotube/Schiff-Base Copper(Ⅱ) Complex

作　　者：熊燕[1] 李曦[1] 许雯靓[1] 曹亚飞[1] 李小雨[1] 董玉林[1] 

机构地区：[1]武汉理工大学理学院,湖北武汉430070

出　　处：《武汉大学学报（理学版）》2012年第4期286-290,共5页Journal of Wuhan University:Natural Science Edition

基　　金：中央高校基本科研业务费专项资金(2012-Ia-022)资助项目

摘　　要：采用循环伏安法制备了二水杨酸乙二胺Schiff碱铜配合物/多壁碳纳米管修饰电极(SalenCu(Ⅱ)/MWNTs/GC).该修饰电极的循环伏安图显示,电荷在SalenCu(Ⅱ)/MWNTs膜中的传递过程受扩散控制.实验结果表明:该修饰电极对抗坏血酸有明显的电催化氧化作用,且峰电流的变化在0.1～1.1mmol.L-1范围内与抗坏血酸的浓度变化呈线性关系;用于抗坏血酸的检测,方法的灵敏度为29.709nA/(μmol.L-1),检出限为0.303μmol.L-1.A novel modified glassy carbon electrode（GCE）with Schiff-base copper（ Ⅱ ） complex/multi-wall carbon nanotube was fabricated using a cyclic voltammetric method in phosphate buffer solution. The Ip of aseorbic acid at Sehiff-base copper（ Ⅱ ） complex/multi-wall carbon nanotube modified electrode was proportional to the square root of scan rate suggesting a diffusion controlled process. This modified electrode exhibited electrocatalytic response to the oxidation of ascorbic acid. The results of line sweep voltammetry showed that the peak current was proportional to the concentration of ascorbic acid in the range of 0.1-1.1 mmol.L 1. The sensitivity is 29. 709 nA/（ μmol. L-1） and the detection limit is 0. 303 μmol. L-1.

关 键 词：Schiff碱铜配合物 碳纳米管 修饰电极 抗坏血酸 电催化 

分 类 号：O657[理学—分析化学]