Eco-friendly synthesis of nickel oxide nanoparticles using Avicennia Marina leaf extract: Morphological characterization and electrochemical application

Abstract

Wide-ranging application in various fields from biomedicine, catalysis and optoelectronic materials to sensors, and environmental pollution prevention by synthesising Metal oxide nanoparticles. In this present work Eco-friendly synthesis of Nickel Oxide Nanoparticles (NiO-NPs) using Avicennia Marina leaf extract in an aqueous medium. The prepared NiO-NPs were characterized by UV–Visible, FT-IR, X-ray diffraction, AFM, FE-SEM, TEM, and electrochemical techniques to find the band gap energy, functional group, grain size, morphology, and the structure, particle size respectively. UV–Vis absorption spectrum of nickel oxide nanoparticles (NiO-NPs) shows a peak in the region of 297 nm. The FTIR spectrum of NiO-NPs shows bands at 872 cm−1 and 466 cm−1. From the FESEM results, the average size of NiO-NPs is seen to be in the range of 30–100 nm. Electrochemical studies were carried out to assess the redox behavior of NiO-NPs. The obtained results confirmed the formation of nickel oxide nanoparticles from the biomaterial leaf component. The methanol oxidation of NiO-NPs has been studied by voltammetry.