• 文献标题:   Electrodeposited nitrogen-doped graphene/carbon nanotubes nanocomposite as enhancer for simultaneous and sensitive voltammetric determination of caffeine and vanillin
  • 文献类型:   Article
  • 作  者:   JIANG L, DING YP, JIANG F, LI L, MO F
  • 作者关键词:   nitrogendoped graphene/carbon nanotube, electrodeposition, ultrasensitive, electrochemical sensor
  • 出版物名称:   ANALYTICA CHIMICA ACTA
  • ISSN:   0003-2670 EI 1873-4324
  • 通讯作者地址:   Shanghai Univ
  • 被引频次:   49
  • DOI:   10.1016/j.aca.2014.05.010
  • 出版年:   2014

▎ 摘  要

A nitrogen-doped graphene/carbon nanotubes (NGR-NCNTs) nanocomposite was employed into the study of the electrochemical sensor via electrodeposition for the first time. The morphology and structure of NGR-NCNTs nanocomposite were investigated by scanning electron microscopy (SEM) and transmission electron microscopy (TEM), respectively. Meanwhile, the electrochemical performance of the glassy carbon electrode (GCE) modified with electrodeposited NGR-NCNTs (ENGR-NCNTs/GCE) towards caffeine (CAF) and vanillin (VAN) determination was demonstrated by cyclic voltammetry (CV) and square wave voltammetry (SWV). Under optimal condition, ENGR-NCNTs/GCE exhibited a wide linearity of 0.06-50 mu M for CAF and 0.01-10 mu M for VAN with detection limits of 0.02 mu M and 3.3 x 10(-3) mu M, respectively. Furthermore, the application of the proposed sensor in food products was proven to be practical and reliable. The desirable results show that the ENGR-NCNTs nanocomposite has promising potential in electrocatalytic biosensor application. (C) 2014 Elsevier B.V. All rights reserved.