TiO2-石墨烯修饰玻碳电极测定邻苯二酚

Detection of Catechol by TiO2-graphene-modified Glassy Carbon Electrode

摘要: 制备了TiO2-石墨烯修饰玻碳电极,利用循环伏安法(CV)和差分脉冲伏安法(DPV)研究了邻苯二酚在该修饰电极的电化学行为.结果表明:在pH值为6.0的磷酸盐缓冲液(PBS)中,该修饰电极对邻苯二酚具有良好的电催化作用.邻苯二酚氧化峰电流与其浓度(1.0×10-6~1.0×10-5mol/L)呈现良好的线性关系,线性相关系数为0.993,检出限为1×10-7mol/L.该电极显著提高了检测的灵敏度,并表现出良好的选择性和重现性

Abstract: A novel TiO2-graphene-modified glassy carbon electrode(TiO2-Gr/GCE) was fabricated.The electrochemical behaviors of catechol at the modified electrode were studied by cyclic voltammetry(CV) and differential pulse voltammetry(DPV).In pH 6.0 phosphate buffer solution(PBS),the composite film showed excellent electrocatalytic activity for the redox of catechol.The results of DPV indicated that the oxidation peak currents was linear with catechol concentrations in the range of 1.0 × 10-6 mol/L to 1.0..