Screen-Printed Bimetallic Cobalt-Manganese Metal-Organic Framework Electrodes for Electrochemical Detection of Dichlorvos

Abstract Organophosphate pesticides are extremely hazardous to human health and the environment, discerning the development of sensitive and selective detection technologies. In this paper, we describe a novel technique for detecting dichlorvos (DDVP), an organophosphate pesticide, using a modified screen-printed electrode (SPE). The metal-organic framework (MOF) containing cobalt and manganese ions in an equimolar ratio was synthesised using a solvothermal method. The synthesized material was characterized using various techniques: FE-SEM, XRD, XPS, BET, Raman spectroscopy, and FTIR. The electro-catalytic behavior of the material was studied utilizing electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV). The insightful behaviour of the material towards dichlorvos had been investigated through differential pulse voltammetry (DPV) in the concentration range of 1- 10 nM with a detection limit of 0.645 nM. Furthermore, we tested our proposed sensor's selectivity and applicability using real-world samples. Our findings provide insight into the development of highly sensitive and selective detection systems for organophosphate pesticides, which might have implications for environmental monitoring and public health.