• 文献标题:   Electrodeposited honeycomb-like cobalt nanostructures on graphene oxide doped polypyrrole nanocomposite for high performance enzymeless glucose sensing
  • 文献类型:   Article
  • 作  者:   HUI N, WANG JS
  • 作者关键词:   honeycomblike cobalt nanostructure, graphene oxide, polypyrrole, electrocatalysi, nonenzymatic sensing, glucose
  • 出版物名称:   JOURNAL OF ELECTROANALYTICAL CHEMISTRY
  • ISSN:   1572-6657 EI 1873-2569
  • 通讯作者地址:   Qingdao Agr Univ
  • 被引频次:   10
  • DOI:   10.1016/j.jelechem.2017.05.021
  • 出版年:   2017

▎ 摘  要

Honeycomb-like cobalt nanostructures modified graphene oxide doped polypyrrole (CoNSs/FtGO/PPy) nano- composites were successfully prepared via a simple two-step electrochemical synthesis route. Firstly graphene oxide (GO) doped PPy nanocompOsite was electrodeposited onto a pretreated glassy carbon electrode (GCE) to obtain GO/PPy nanocomposite; secondly honeycomb-like cobalt nanostructures were electrochemical reduced onto GO/PPy nanocomposite surface in a cobalt chloride solution at - 1.0 V. During the second reduction process, GO/PPy was reduced to a more conductive RGO/PPy nanocomposite simultaneously. The electrode modified with CoNSs/RGO/PPy nanocomposites exhibited outstanding electrocatalytic performance for enzymeless glucose sensing in alkaline media. Under optimum experimental conditions, the nonenzymatic glucose sensor displayed linear ranges from 0.5 mu M to 2.667 mM, a high sensitivity of 297.73 mu A mM(-1) cm(-2), a very low detection limit of 29 nM (at S/N = 3) and a superfast response time of 1 s. The developed glucose sensor displayed favorable selectivity against common interferents, excellent stability and high reproducibility, and it has great potential to successfully detect glucose concentration in real biological samples.