• 文献标题:   Electrocatalytic behahiour of cobalt tetraamino-phthalocyanine in the presence of a composite of reduced graphene nanosheets and of multi-walled carbon nanotubes
  • 文献类型:   Article
  • 作  者:   NYONI S, NYOKONG T
  • 作者关键词:   reduced graphene nanosheet, electrochemical sensor, phthalocyanine, paraquat
  • 出版物名称:   ELECTROCHIMICA ACTA
  • ISSN:   0013-4686 EI 1873-3859
  • 通讯作者地址:   Rhodes Univ
  • 被引频次:   12
  • DOI:   10.1016/j.electacta.2014.05.093
  • 出版年:   2014

▎ 摘  要

A composite of multi-walled carbon nanotubes (MWCNT) with reduced graphene nanosheets (rGNS-2) was developed in order to minimize the restacldng of the latter. The composite was used to modify a glassy carbon electrode (GCE). GCE was further modified with cobalt tetraamino phthalocyanine (CoTAPc). The modified electrode is represented as rGNS-2-MWCNT-CoTAPc-GCE. X-ray photoelectron spectroscopy, transmission electron microscopy, scanning electrochemical microscopy and Raman spectroscopy were used to explore into surface functionalities, morphology and topography of the nanocomposite. The rGNS-2-MWCNT-00TAPc-GCE had a low limit of detection of 3.32 x 10(-8) M towards the detection of paraguat as a test analyte. A mechanism for paraquat detection using an rGNS-2-MWCNT-00TAPc-GCE is also proposed in this work. (C) 2014 Elsevier Ltd. All rights reserved.