A functional electrochemical sensing platform for the detection of lead ions

Abstract

Abstract A novel electrochemical sensor for the detection of lead ions was constructed by using electrodeposition of gold nanoparticles (GNPs) and glutathione (GSH) onto reduced graphene oxide (rGO) to form a GSH@GNP@rGO nanocomposite on a glassy carbon electrode (GSH@GNP@rGO@GCE). The sensing properties of the obtained sensor were tested by Cyclic Voltammetry (CV) and Differential Pulse Voltammetry (DPV). Under optimized experimental conditions, the voltammetry response gradually raises by increasing the concentration (2-20 μΜ). The result showed that the GSH@GNP@rGO@GCE sensor exhibited high sensitivity towards Pb(II) with a low detection limit of 0.43 μMby DPV. Our studies suggest that the GSH@GNP@rGO nanocomposite could potentially be used for detecting Pb(II).