聚2,6-吡啶二甲酸/多壁碳纳米管修饰电极的电催化性能  

Electrocatalytic Behavior of Poly(2,6-pyridinedicarboxlic acid)/Multi-walled Carbon Nanotube Modified Electrode

作　　者：李春香[1] 曾云龙[1] 

机构地区：[1]湖南科技大学化学化工学院,湘潭411201

出　　处：《分析化学》2006年第7期999-1002,共4页Chinese Journal of Analytical Chemistry

基　　金：湖南省自然科学基金资助项目(No.04JJ30047)

摘　　要：研制了一种聚2,6-吡啶二甲酸/多壁碳纳米管（PPDA/MCNT）复合修饰电极.该电极以中性KCl溶液为底液,在玻碳电极上以多壁碳纳米管（MCNT）作掺杂剂,通过电聚合2,6-吡啶二甲酸（PDA）而制得.该修饰电极对多巴胺（DA）有很强的电催化氧化作用.在磷酸盐缓冲液（pH 7.2）中,与碳纳米管修饰电极相比,DA的氧化峰电位降低约30 mV.利用线性扫描伏安法（LSV）测定,DA在9.0×10^-8～8.0×10^-6 mol/L浓度范围内,其峰高与浓度呈线性关系;检出限为5.0×10^-8 mol/L,并可避免AA、UA对测定产生干扰.A poly （2, 6-pyridinedicarboxlic acid/multi-walled carbon nanotube composite （PPDA/MCNT） modified electrode was fabricated by electropolymerization of 2, 6-pyridinedicarboxlic acid on glassy carbon electrode with multi-wall carbon nanotube as dopant in neutral KCl solution. The modified electrode exhibited strong electrocatalytic behavior to the oxidation of dopamine （DA）. Compared with carbon nanotube modified electrode, at PPDA/MCNT modified electrode, the oxidation peak potential of DA induced about 30 mV in phosphate buffer solution （ pH 7.2）. The oxidation peak current increased linearly with the concentration of DA in the range of 9.0 × 10^-8 -8.0 × 10^-6 mol/L. The detection limit was 5.0 × 10^-8 mol/L. Furthermore, ascorbic acid and uric acid didn＇t affect the determination of DA.

关 键 词：碳纳米管 2 6-吡啶二甲酸 电聚合 化学修饰电极 

分 类 号：O657.1[理学—分析化学]