基于碳纳米管-石墨烯纳米片复合膜修饰金电极同时测定邻苯二酚和对苯二酚

doi:10.3724/SP.J.1095.2014.30469

摘要/Abstract

摘要： 制备了一种碳纳米管-石墨烯纳米片复合膜修饰金电极的用于同时测定邻苯二酚和对苯二酚电化学传感器。并应用循环伏安法研究了邻苯二酚和对苯二酚在该电极上的电化学行为，邻苯二酚和对苯二酚的浓度检测采用差分脉冲伏安法，结果表明，碳纳米管-石墨烯纳米片复合膜极大的增强了邻苯二酚和对苯二酚的电催化活性。并在0.5~6.0×10-4 mol/L浓度范围内与响应电流有良好的线性关系。邻苯二酚和对苯二酚的最低检测限分别是5.0×10-9和4.8×10-9 mol/L。该电化学传感器能用于实际样品中的酚类化合物的检测。

关键词: 碳纳米管, 石墨烯, 杂化纳米片, 邻苯二酚, 对苯二酚

Abstract: An electrochemical sensor for simultaneous determination of catechol(CC) and hydroquinone(HQ) based on carbon nanotubes(CNTs)-graphene nanosheet(GNS) hybrid film modified gold electrode（GE） was prepared. The electrochemical behavior of CC and HQ at the CNTs-GNS modified GE was investigated by cyclic voltammetry(CV). The results showed that the electrocatalytic activity of CC and HQ was significantly enhanced by the modification of CNTs-GNS hybrid films. The electrochemical sensor based on the hybrid modified GE exhibited excellent analytical performance for CC and HQ detection with a low detection limit of 5 nmol/L and 4.8 nmol/L(S/N=3), respectively, and a wide linear range of 0.5~600 μmol/L for both CC and HQ. Moreover, the CNTs-GNS/GE also showed good selectivity and stability.

Key words: carbon nanotubes, graphene, nanosheets hybrid, catechol, hydroquinone

中图分类号:

O646

罗启枚, 王辉宪, 刘登友. 基于碳纳米管-石墨烯纳米片复合膜修饰金电极同时测定邻苯二酚和对苯二酚[J]. 应用化学, DOI: 10.3724/SP.J.1095.2014.30469.

LUO Qimei, WANG Huixian, LIU Dengyou*. Simultaneous Determination of Catechol and Hydroquinone Based on Gold Electrode Modified with Carbon Nanotubes-graphene Nanosheet Hybrid Films[J]. Chinese Journal of Applied Chemistry, DOI: 10.3724/SP.J.1095.2014.30469.

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