基于天青Ⅰ/纳米金/多壁碳纳米管自组装修饰电极对NADH的催化氧化  

Electrocatalysis of NADH Oxidation Based on AzureⅠ/Gold Colloidal Nanoparticles/Multi-walled Carbon Nanotube Self-assembled Modified Glassy Carbon Electrode

作　　者：王娜[1] 朱梅英[1] 

机构地区：[1]河北医科大学基础医学院医用化学教研室,河北石家庄050017

出　　处：《河北师范大学学报（自然科学版）》2008年第4期492-495,499,共5页Journal of Hebei Normal University：Natural Science

基　　金：国家自然科学基金(29705001);重庆市自然科学基金(CSTC-2004BB4149)

摘　　要：将多壁碳纳米管（MWNT）与壳聚糖（CS）的混合液滴涂到玻碳电极表面，再引入纳米金（GNPs）与天青Ⅰ（AI）制得了AI／GNPs／CS/MWNT修饰电极，并探讨了该修饰电极的电化学性质．实验表明：该修饰电极对烟酰胺腺嘌呤二核苷酸（NADH）的电化学氧化具有很好的催化活性．NADH氧化峰电位比未修饰的玻碳电极负移了660mV，氧化峰电流与其浓度在9．10×10^-6～5．53×10^-3mol／L的范围内呈良好的线性关系，相关系数为0．997，检出限为4．50μmol／L．An azure Ⅰ/gold colloidal nanoparticles/multi-walled carbon nanotube （AI/GNPs/CS/MWNT） wodified glassy carbon electrode was fabricated. The electrochemical behaviors of modified electrode have been described. The modified electrode showed a good electrochemically catalytic activity for the oxidation of reduced nicotinamide adenine dinucleotide （NADH） ,in which the peak potential shifted negatively for 660 mV on the modified electrode compared with unmodified glassy carbon electrode. The catalytic current of NADH versus,its concentration,had a good linearity in the range of 9.10 × 10^-6～ 5.53 × 10^-3 mol/L, with a detection limit of 4.50μmol/L.

关 键 词：碳纳米管 纳米金 NADH 电催化氧化 

分 类 号：O657.1[理学—分析化学]