单壁碳纳米管-氨基二茂铁复合物修饰玻碳电极对对硝基苯酚的电化学检测

Electrochemical Detection of p-Nitrophenol on a Single Walled Carbon Nanotube-Aminoferrocene Composites Modified Glassy Carbon Electrode

本研究用氨基二茂铁（Aminoferrocene,AFc）经重氮化反应后修饰单壁碳纳米管（SWNTs）,制备SWNTs-AFc复合物,并以该复合物修饰玻碳电极（GCE）,通过循环伏安法（CV）和差分脉冲伏安法（DPV）等电化学方法检测对硝基苯酚（p-NP）。结果表明,与裸玻碳电极相比,SWNTs-AFc/GCE对p-NP响应的还原过电位显著减小,峰电流大大增强,p-NP的检测线性范围为1~850μmol/L（R^2=0.997）,检测限为1μmol/L。该方法电流响应快、灵敏度高、检测限低,具有良好的应用前景。

Single walled carbon nanotubes/aminoferrocene composites（SWNTs-AFc）were prepared via a diazo-reaction of single walled carbon nanotubes（SWNTs）and aminoferrocene（AFc）and used as a novel electrode materia to modify glassy carbon electrode（GCE）for the detection of p-nitrophenol（p-NP）by cyclic voltammetry（CV）and differential pulse voltammetry（DPV）.The results indicated that the SWNTs-AFc composites modified GCE showed remarkable decreased reduction potential and increased current response compared with bare GCE.The determination of p-NP at the modified electrode displayed linear range from 1 to 850μmol/L（R^2=0.997）and the detection limit of 1μmol/L.The established method shows fast speed,high sensitivity and low limitation and has good application potential.