Voltammetric determination of o-chlorophenol using beta-cyclodextrin/graphene nanoribbon hybrids modified electrode

摘要

Being harmful to the humans and environment, the highly sensitive detection of o-chlorophenol (o-CP) is very significant. In this paper, graphene nanoribbon (GNR) functionalized with 2-hydroxypropyl-beta-cyclodextrin (HP-beta-CD-GNR) hybrids possessing synthetic effect of GNR (excellent electrochemical properties and large surface area) and HP-beta-CD (high host-guest recognition and enrichment capability) were prepared and used to modify glassy carbon electrode (GCE) for detecting o-CP. The electrochemical sensing of o-CP was studied by cyclic voltammetry and differential pulse voltammetry, the results show that the oxidation current of o-CP at HP-beta-CDGNR/GCE is much higher than those at GNR/GCE and bare GCE owing to the synthetic effect of GNR and HP-beta CD. Under the optimum conditions, the HP-beta-CD-GNR/GCE has a low detection limit (0.004 mu M) with a wide linear range (0.01-16.0 mu M) for o-CP. Finally, the developed method for detecting o-CP was successfully applied in real samples.