碳纳米管电极对铅和铜的检测研究

A Resecrch of Lead and Copper Testing by the Preparation of Carbon Nanotube Electrodes

用碱性缓冲溶液分散碳纳米管(CNTs),通过层层自组装的方法构筑了聚二甲基烯丙基氯化铵(PDDA)/CNTs多层膜电极,采用差分脉冲伏安法同时测定。紫外-可见光谱法对PDDA/CNTs多层膜的组装过程进行了表征。研究了PDDA/CNTs组装层数、支持电解质种类、富集电位和富集时间等对溶出峰电流的影响。该多层膜修饰电极检测铅、铜离子具有良好的线性范围和抗干扰能力。

In this paper,carbon nanotubes（CNTs） are dispersed by the alkaline buffer.Through layer-by-layer assembly poly（dimethyldiallylammonium） chloride（PDDA） /CNTs multilayer film modified electrode is fabricated on the gold electrode.The PDDA/CNTs multilayer films modified electrode is used for the simultaneous determination of lead and copper with differential pulse anodic stripping voltametry.PDDA/CNTs multilayer films are characterized by UV-Vis spectroscopy.The effect of the number of assembled layer,supporting electrolyte,the accumulation potential and time are studied on the stripping wave currents.The carbon nanotubes modified electrodes has good linear range and anti-interference ability.