离子液体掺杂聚苯胺/纳米铜修饰电极制备及其在过氧化氢测定中的应用  

Preparation of Nano-Cu/Ionic Liquid-Polyaniline Modified Glassy Carbon Electrode and Its Application in Electrochemical Analysis of H_2O_2

作　　者：何世伟[1,2] 吴宏伟[3] 习玲玲[2] 

机构地区：[1]浙江省科技信息研究院,杭州310006 [2]浙江大学西溪校区化学系,杭州310028 [3]新乡医学院基础医学院,新乡453000

出　　处：《分析化学》2013年第5期766-770,共5页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金项目(20775070);浙江省自然科学基金(Y4100190)资助课题

摘　　要：在离子液体1-甲基咪唑-三氟乙酸中用循环伏安法(CV)电聚合苯胺制得离子液体掺杂聚苯胺膜修饰玻碳电极(IL-PANI/GCE),进一步在其表面原位电沉积纳米铜粒子,构制用于测定H2O2的新型离子液体掺杂聚苯胺/纳米铜(nano-Cu/IL-PANI/GCE)电化学传感器。用扫描电镜(SEM)、循环伏安法(CV)和电化学阻抗谱法(EIS)表征此修饰电极,并讨论了其对H2O2的电催化还原机制。在0.1 mol/L NaOH溶液和"0.35 V电位下,用电流法测定了H2O2的含量,在20～1.12 mmol/L浓度范围内线性关系良好;检出限为0.1μmol/L,响应时间约为3 s。A film consisting of a room temperature ionic liquid 1-methylimidazolium trifluoroacetate and polyaniline （IL-PANI） was electro-polymerized on glassy carbon electrode （GCE）, then a novel electrochemical sensor for the detection of hydrogen peroxide （H202 ） was constructed based on immobilizing copper nanoparticles （nano-Cu） on IL-PANI/GCE. The electrochemical activity and the electrocatalytical behavior of the sensor were characterized by cyclic voltammetry （CV） and electrochemical impedance spectroscopy （EIS）. Amperometry was used for the determination of H202 at a potential of -0.35 V versus Ag/AgC1 in a 0.10 mol/L sodium hydroxide solution, with a linear range from 20μmol/L to 1.12mmol/L, a detection limit of 0. 1 μmol/L, and a response time of around 3 s. The nano-Cu/IL-PANI/GCE exhibited good electrocatalytic properties for the electrochemical reduction of H2O2.

关 键 词：离子液体 聚苯胺 纳米铜粒子 玻碳电极 过氧化氢 

分 类 号：O657.1[理学—分析化学]