碳纳米管/聚对甲基吡啶修饰电极测定硝基苯甲酸

Application of a single wall carbon nanotubes/poly (4-methypyridine) modified electrode for determination of nitrobenzoic acid

采用滴涂法和循环伏安法在玻碳电极上电沉积一层稳定的单壁碳纳米管/聚对甲基吡啶纳米薄膜(SWNTs/POMP)。研究了邻、对硝基苯甲酸在此修饰电极上的电化学行为,建立了电化学同时测定邻、对硝基苯甲酸的新方法。实验结果表明:在0.1 mol/L HClO4溶液中,邻、对硝基苯甲酸在SWNTs/POMP电极上发生不可逆的还原反应,由于碳纳米管和聚合物薄膜的协同效应,SWNTs/POMP电极对邻、对硝基苯甲酸有很好的的电催化作用,并对其响应进行了定量分析。

A stable nanocomposite of single wall carbon nanotubes-poly（4-methypyridine） was prepared at a glassy carbon electrode（SWNTs/POMP/GCE） by means of dipping and electropolymerization method.The electrochemical behaviors of o-and p-nitrobenzoic acid were investigated at the resulting SWNTs/POMP/GCE and a new method for electrochemical determination of o-and p-nitrobenzoic acid was established.The results showed that o-and p-nitrobenzoic acid exhibited irreversible electrochemical reduction,and an excellent electrocatalytic property of the SWNTs/POMP/GCE was observed due to the synergetic effect of carbon nanotubes and conducting polymers.