基于聚酰胺-胺功能化碳纳米管负载钯纳米粒子的过氧化氢传感器  

A Hydrogen Peroxide Sensor Based on Palladium Nanoparticles Loading to Poly(amidoamine) Dendrimers Functionalized Carbon Nanotubes

作　　者：张彦军[1] 刘秀辉[1] 卢娟娟[1] 魏宏伟[1] 卢小泉[1] 

机构地区：[1]甘肃省生物电化学与环境分析重点实验室,西北师范大学化学化工学院,兰州730070

出　　处：《分析化学》2016年第9期1402-1409,共8页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金(No.21565021)资助项目~~

摘　　要：采用电化学法将钯纳米粒子(PdNPs)沉积在第四代聚酰胺-胺树状大分子(G4.0 PAMAM)功能化碳纳米管(MWCNTs)复合材料(G4.0-MWCNTs)修饰的玻碳电极表面,构建了一种新型过氧化氢(H_2O_2)传感器。采用场发射扫描电镜、循环伏安法和电化学阻抗谱对修饰电极进行表征,结果表明,大量高分散的PdNPs沉积在G4.0-MWCNTs修饰的电极上,修饰电极对H_2O_2还原具有优异的电催化性能。在优化条件下,H_2O_2浓度在1.0×10^(-9)~1.0×10^(-3)mol/L范围内与电流响应呈线性关系,检出限为3×10^(-10)mol/L(S/N=3),测定血清实样加标回收率在96.7%~103.1%之间。The fourth generation poly（ amidoamine） dendrimers（ G4.0 PAMAM） functionalized multiwalled carbon nanotube（ G4. 0-MWCNTs） was prepared by amidation between carboxylated multiwalled carbon nanotube（ MWCNTs） and G4.0 PAMAM. Then a novel hydrogen peroxide（H2O2） sensor was fabricated by electrodepositing Pd nanoparticles（ NPs） on a glassy carbon electrode（ GCE） modified with G4.0-MWCNTs composites. The modified electrode was characterized by field emission scanning electron microscopy（ FESEM）,cyclic voltammetry（ CV） and electrochemical impedance spectroscopy（ EIS）. A large amounts of highly dispersion Pd NPs could be well loaded on the surface of the G4.0-MWCNTs,and the modified electrode exhibited excellent electrocatalytic activity towards the reduction of H2O2. Under the optimized conditions,the reduction peak currents of H2O2 were linear to their concentrations in the range from 1.0×10^（-9）mol / L to 1.0×10^（-3）mol / L and the limit of detection of 2.3 × 10^（-8）mol / L was obtained. The recovery of standard addition for human serum samples was 96.7%-103.1%.

关 键 词：钯纳米粒子 聚酰胺-胺树状大分子 功能化碳纳米管 电沉积 过氧化氢传感器 

分 类 号：O657.1[理学—分析化学] TP212[理学—化学]