铜纳米粒子在碳纳米管上的原位生长及对过氧化氢电催化性能的研究

In-situ growth of copper nanoparticles on carbon nanotubes and its application for electrocatalysis of hydrogen peroxide

采用一种温和且有效的方法,将聚丙烯酸非共价修饰到碳纳米管上,并以其为模板,在碳纳米管上原位均匀的生长铜纳米粒子,制备了铜/聚丙烯酸/碳纳米管(Cu/PAA/CNT)纳米复合材料,并以此材料构建了一种新型的非酶H2O2传感器,研究了其对H2O2的电催化行为。结果表明:铜纳米粒子较均匀的生长在碳纳米管上,制备的纳米复合材料修饰到电极表面对H2O2表现出良好的电流响应,可实现对H2O2的灵敏测定,其响应电流与H2O2的浓度在1.9×10-6～8.0×10-4mol/L范围内呈良好的线性关系,检测限达6.3×10-7mol/L。

In this contribution, we employed a moderate and effective in-situ growth approach to load copper nanoparticles on the sidewalls of carbon nanotubes （CNT） for preparation of CufPAA/CNT nanocomposites which were used for electrocatalysis of hydrogen peroxide （ H2O2 ）. Polyacrylic acid （PAA） was noncovalently functionalized on CNT surfaces and then as a template, it could make copper nanoparticles deposit uniformly on the sidewalls of carbon nanotubes. A novel non-enzymatic H2O2sensor （CufPAA/CNT/GCE） was constructed, and it exhibited good electrocatytic activity for the reduction of H2O2. The linear calibration ranged from 1.9 × 10-6 to 8.0 × 10 -4mol/L with a detection limit of 6. 3 × 10 -7 mol/L.