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A simple and sensitive electrochemical sensor was reported for the simultaneous detection of Cd(II) and Pb(II) using gold nanoparticles functionalized -cyclodextrin (-CD)-graphene hybrids (AuNPs-CD-GS) as the sensing platform. The disperse AuNPs-CD-GS are fabricated by a simple one-pot synthesis using hydrazine and -CD as reducing agents to reduce the graphene oxide and gold ions. A homogeneous AuNPs on the CD-GS was obtained and the concentration of HAuCl4 was considered. This nanocomposite not only presents the excellent electrical properties of AuNPs and GS but also shows high capture capability due to the strong adsorption uptake of Cd and Pb on -CD. Under the optimal conditions, the stripping peak currents are linearly related to the concentrations of Cd and Pb over the range from 40 1200 g L. The simultaneous and sensitive detection of Cd and Pb in real water samples was also conducted and the satisfactory results were obtained.

international journal of electrochemical science

An Electrochemical Sensor for Simultaneous Stripping Determination of Cd(II) and Pb(II) Based on Gold Nanoparticles Functionalized β-cyclodextrin-graphene Hybrids