Abstract
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-β-cyclodextrin (HP-β-CD-GNR) hybrids possessing synthetic effect of GNR (excellent electrochemical properties and large surface area) and HP-β-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-β-CD-GNR/GCE is much higher than those at GNR/GCE and bare GCE owing to the synthetic effect of GNR and HP-β-CD. Under the optimum conditions, the HP-β-CD-GNR/GCE has a low detection limit (0.004μM) with a wide linear range (0.01–16.0μM) for o-CP. Finally, the developed method for detecting o-CP was successfully applied in real samples.
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