Detection of pesticide using Cu-rGO modified electrochemical sensor

Abstract

The increased population of the world has intensified the demand for food, which escalates the use of pesticides in agricultural fields. The pesticides contaminate food, soil, and water bodies. The present article focuses on the detection of pesticides in runoff water from agricultural fields. In this study, a high sensitive electrochemical sensor for detection of organophosphate with the help of Cu-rGO nanocomposite. Cu-rGo was synthesized using the co-precipitation method and GO was synthesized using modified hummer’s method. The scanning Electron microscope, X-ray diffraction, and Raman spectroscopy confirmed the successful synthesis of the nanocomposite. The surface morphology of the nanocomposite was obtained from SEM analysis. Cyclic voltammetry and differential pulse voltammetry was performed using corrtest Potentiostat (CS 350) and a three-electrode setup for determination of electrochemical behavior of Cu-rGO nanocomposite and its interaction with malathion. Cu-rGO nanoparticles were deposited on the surface of a glassy carbon electrode and used as a working electrode and Ag/AgCl electrode as reference electrode and platinum wire as the counter electrode was used for detection of pesticide. Altogether, Cu-rGO modified electrode produced a very good result for the determination of pesticide in runoff water samples of agricultural fields.