Polyaniline‐ZnO−NiO Nanocomposite Based Non‐enzymatic Electrochemical Sensor for Malathion Detection

Abstract

An electrochemical sensor based on polyaniline-ZnOÀ NiO (PANI-ZnOÀ NiO) nanocomposite was developed for the non-enzymatic detection of malathion. The structure, surface morphology, and optical properties of the as-prepared nanocomposite were studied by XRD, FTIR, SEM, and UV-Vis spectroscopy. The electrochemical behavior of the nanocomposite based sensor was first evaluated through cyclic voltammetry (CV). Under optimum conditions, differential pulse voltammetry (DPV) was further utilized for malathion detection, which proved the PANI-ZnOÀ NiO/GCE electrode as an effective electrochemical sensor. The developed electrochemical sensor showed a low detection limit of 1.0 × 10 À 8 M with a wider linear range of 10 to 70 nM for malathion.