• 文献标题:   A graphene-based electrochemical sensor for sensitive and selective determination of hydroquinone
  • 文献类型:   Article
  • 作  者:   LI SJ, XING Y, WANG GF
  • 作者关键词:   electrochemical reduction, graphenemodified electrode, hydroquinone, electrocatalytic, selectivity
  • 出版物名称:   MICROCHIMICA ACTA
  • ISSN:   0026-3672
  • 通讯作者地址:   Anyang Normal Univ
  • 被引频次:   69
  • DOI:   10.1007/s00604-011-0709-x
  • 出版年:   2012

▎ 摘  要

Graphene was prepared by electrochemical reduction of exfoliated graphite oxide at cathodic potentials, and used to fabricate a graphene-modified glassy carbon electrode (GCE) which was applied in a sensor for highly sensitive and selective voltammetric determination of hydroquinone (HQ). Compared to a bare (conventional) GCE, the redox peak current for HQ in pH 5.7 acetate buffer solution is significantly increased, indicating that graphene possesses electrocatalytic activity towards HQ. In addition, the peak-to-peak separation is significantly improved. The modified electrode enables sensing of HQ without interference by catechol or resorcinol. Under optimal conditions, the sensor exhibits excellent performance for detecting HQ with a detection limit of 0.8 mu M, a reproducibility of 2.5% (expressed as the RSD), and a recoveries from 98.4 to 101.2%.