Chinese Journal of Applied Chemistry

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Simultaneous Determination of Catechol and Hydroquinone Based on Gold Electrode Modified with Carbon Nanotubes-graphene Nanosheet Hybrid Films

LUO Qimei, WANG Huixian, LIU Dengyou*   

  1. (Science College of Hunan Agricultural University,Changsha 410128,China)
  • Received:2013-09-17 Revised:2013-11-26 Published:2014-08-10 Online:2014-08-10

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

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