Fabrication of Nanocomposite-based Sensor for Selective Detection of Heavy Metal Ion in Aqueous Media

Abstract

Heavy metals contamination is a severe quality concern in many fast-growing cities, because maintenance of water quality and sanitation infrastructure were not increased with population and urbanization growth especially for the developing countries. Lead (Pb²⁺) and Mercury (Hg²⁺), in water pose enormous environmental and health issues that make it imperative to produce an efficient detection method. SU-101 MOF@Ppy NWs is a conducting nanocomposite material composed of Bismuth metal with ellagic acid as a linker, fabricated with the help of the novel microwave-assisted methodology, in this research study. Before testing the conductivity of this nanocomposite, FTIR analysis was done appropriately to ensure the structural reliability and purity of the obtained compounds. Electrochemical studies, including CV and EIS, demonstrated enhanced conductivity of the SU-101 MOF@PpyNWs nanocomposite. Square Wave Voltammetry further proved it to be a promising detection material for Lead and Mercury, suggesting its importance as a heavy metal ion detector in aqueous media. The Limit of Detection calculated was 2.026ng/L and 2.184ng/L for Pb2+ and Hg2+ respectively.