基于[Ru(bpy)_(3)]^(2+)对邻氯苯酚的电催化氧化检测邻氯苯酚

Detection of O-chlorophenol by Electrocatalytic Oxidation of [Ru(bpy)_(3)]^(2+)

为有效检测酚类污染物邻氯苯酚(o-CP),采用微分脉冲伏安法和循环伏安法探究了邻氯苯酚在铟锡氧化物(Indium Tin Oxide,ITO)电极上的电化学行为及多吡啶钌配合物[Ru(bpy)_(3)]^(2+)(bpy=2,2’-联吡啶)对邻氯苯酚的电催化氧化。研究结果表明,邻氯苯酚在ITO电极上呈现一个受吸附控制的不可逆氧化峰。当邻氯苯酚测定体系中加入[Ru(bpy)_(3)]^(2+)后,[Ru(bpy)_(3)]^(2+)对邻氯苯酚的氧化呈现明显的电催化作用。根据催化峰电流随邻氯苯酚浓度变化的线性关系,可以实现邻氯苯酚的电催化检测。此法检测邻氯苯酚的线性范围、灵敏度和检测限分别为0.005-0.4 mmol·L^(-1),136.02μA/(mmol·L^(-1))和0.09μmol·L^(-1)(S/N=3)。

In order to detect the phenolic pollutant o-chlorophenol effectively,the electrochemical behavior of o-chlorophenol and the electrocatalytic oxidation of o-chlorophenol by ruthenium complexes[Ru(bpy)_(3)]^(2+)(where bpy=2,2’-bipyridine)on indium tin oxide(ITO)electrode were investigated by differential pulse voltammetry and cyclic voltammetry.The results showed that o-chlorophenol exhibited an irreversible oxidation peak on the ITO electrode,which was controlled by adsorption process.When[Ru(bpy)_(3)]^(2+)was added to the test system of o-chlorophenol,[Ru(bpy)_(3)]^(2+)showed obvious electrocatalytic effect on the oxidation of o-chlorophenol.According to the linear relationship between the peak currents and concentrations of o-chlorophenol,the electrocatalytic detection of o-chlorophenol can be realized.The linear range,sensitivity and detection limit of o-chlorophenol were 0.005-0.4 mmol·L^(-1),136.02μA/(mmol·L^(-1))and 0.09μmol·L^(-1),respectively(S/N=3)。