科研之友
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摘要
A highly effective copper nanoparticle (CuNP) coupled with reduced graphene oxide was successfully prepared by liquid phase reduction. The as-prepared products were tested with X-ray diffraction, field emission transmission electron microscopy, and scanning electron microscopy. CuNPs were distributed averagely on the surface of reduced graphene oxide. CuNP/RGO nanocomposites modified bare glassy carbon electrode was measured by electrochemical impedance spectroscopy and cyclic voltammetry. The availability of CuNP/RGO nanocomposites was analyzed by square wave anodic stripping voltammetry (SWASV). The nanocomposites showed a high electroanalytical activity and eximious sensitivity to Hg(II), Cu(II), Cd(II) and Pb(II), these ions exhibited sensitivities of 27.76, 25.86, 66.30 and 50.17 mu A/mu M, respectively, and the limits of detection were 0.051, 0.111, 0.203 and 0.186 mu M, respectively. The CuNP/RGO nanocomposite was used firstly to detect individually and simultaneously various heavy metal ions. Furthermore, CuNP/RGO/GCE has good anti-interference properties and stability. In this study, CuNP/RGO nanocomposites are presented as a potential material to detect individually and simultaneously heavy metal ions.
