: Synthesis of Polyvinylpyrrolidone-Natural Swelling Clay Composites: Application for Complexation of Pb2+
: Valery Hambate Gomdje
: Volume 4 (2017)
: The aim of this work is to synthesize Polyvinylpyrrolidone-Natural Swelling Clay composite using chemical exchange reactions and intercalation method. The composite film was used to modify the Glassy glass electrodes to study the effect of the complexation of the lead ions by the electrochemical route and showed the good electrocatalytic activity toward lead ions. X-ray Diffraction, specific surface areas and pore volumes, Thermal analysis, Transmission Electronic Microscopy and X-ray Photoelectron Spectroscopy are used. The parameters such as pH of the electrolyte and preconcentration time were investigated to show the optimum conditions for chelation of lead in the electrolytic solution (1M KCl). A Voltammetric method for electrochemical chelation of Pb2+ shows the good response over the concentration range from 10-7 to 12x10-7M (R2=0.996), with a limit of detection is 1.815x10-7M. These values show that the modified glassy carbon electrode with polyvinylpyrrolidone-Natural Swelling clay film composite can be used as an electrochemical sensor for the detection of Lead (Pb2+) in solution.