邻对苯二酚在石墨烯-聚噻吩复合膜修饰电极上的电化学行为及测定

Electrocatalytic acticity and simultaneous determination of catechol and hydroquinone by the glassy carbon electrode modified with graphene and polythiophene

研制了一种新型的石墨烯／聚噻吩复合膜修饰玻碳电极（GR／PTh／GCE），在0．100mol／L的柠檬酸-磷酸氢二钠缓冲溶液中（pH7．0），利用循环伏安法（CV）研究了该修饰电极对邻苯二酚（CC）和对苯二酚（HQ）的电催化作用，同时利用差分脉冲溶出伏安法（DPSV）测定邻苯二酚和对苯二酚的含量，线性范围为1．00×10^-6～4．00×10^-4mol／L，检出限为1．50×10^-3mol／L，并应用于模拟废水中邻苯二酚和对苯二酚的测定，回收率分别为98．0％-103．0％、96．0％-104．0％，效果良好。

A new-type glassy carbon electrode modified with graphene and polythiophene has been obtained. In a buffer so- lution （0. 100 mol/L pH 7.0 citric acid-disodium hydrogen phosphate） ,the eletrocatalysis to catechol and hydroquinone by cyclic voltammeter has been investigated. The content of catecho] and hydroquinone can be detected by differential pulse stripping voltammetry, with the linear range of 1.00 × 10^-6- 4.00 × 10^-4 mol/L and the limit of detection of 1.50 × 10^-7 mol/L. This method has been applied to detect the content of the catechol and hydroquinone in simulative wastewater with recoveries of 98.0% - 103.0% , 96.0% - 104. 0% respectively.