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.
出处
《武汉大学学报（理学版）》
CAS
CSCD
北大核心
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
关键词
Schiff碱铜配合物
碳纳米管
修饰电极
抗坏血酸
电催化
Schiff-base copper（ Ⅱ ） complex
multi-wall carbon nanotube
modified electrode
ascorbic acid
elec-trocatalytic oxidation
