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以Nafion为溶剂分散氮掺杂石墨烯,利用氮掺杂石墨烯良好的电化学性能及Nafion的富集和选择性透过特征制备了用于快速检测硝基苯类化合物的修饰电极NG-Nafion/GCE。采用原子力显微镜对氮掺杂石墨烯-Nafion修饰电极的形貌进行了表征,利用循环伏安法和方波伏安法表征了修饰电极的电化学特征,建立了此修饰电极方波伏安法检测硝基苯的方法。在最佳实验条件下,方波伏安的峰电流强度与硝基苯的浓度在3~12μmol/L和50~500μmol/L范围内成线性相关,检出限为0.5μmol/L。以此方法对湖水水样和自来水水样中的硝基苯进行加标回收检测,回收率在95.4%~103.5%之间。
Nitrogen-doped graphene was dispersed by using Nafion as a solvent, and the modified electrode NG-Nafion for rapid detection of nitrobenzene compounds was prepared by the good electrochemical performance of nitrogen-doped graphene and the enrichment and selective permeation characteristics of Nafion. / GCE. The morphology of the nitrogen-doped graphene-Nafion modified electrode was characterized by atomic force microscopy. The electrochemical characteristics of the modified electrode were characterized by cyclic voltammetry and square wave voltammetry. The square wave voltammetry Detection of nitrobenzene method. The peak current intensity of square wave voltammetry was linearly correlated with nitrobenzene concentration in the range of 3 ~ 12μmol / L and 50 ~ 500μmol / L with the detection limit of 0.5μmol / L under the optimal experimental conditions. In this way, the concentration of nitrobenzene in water sample of tap water and water sample of tap water was measured and the recoveries were between 95.4% and 103.5%.