4.7 Article

Green synthesis of cotton flower shaped nickel oxide nanoparticles: Anti-bacterial and tribological studies

Journal

INORGANIC CHEMISTRY COMMUNICATIONS
Volume 157, Issue -, Pages -

Publisher

ELSEVIER
DOI: 10.1016/j.inoche.2023.111239

Keywords

Nickel oxide nanoparticles; Sol-gel; Cassia Fistula plant extracts; Antibacterial activity; Tribological studies

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This study synthesized nickel oxide nanoparticles using the sol-gel method with Cassia Fistula plant extract as a stabilizing and capping agent. The synthesized NiO-NPs were characterized using various techniques and their biological and tribological properties were investigated.
The goal of this study was to synthesize nickel oxide nanoparticles (NiO-NPs) by the sol-gel method, which involved the use of Cassia Fistula is a herbal and medicinal plant. The Cassia Fistula (CF) plant extract acts as a stabilizing and capping agent. Further, NiO-NPs were characterized using UV-Visible spectroscopy (UV-Vis), Powder X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Scanning electron microscopy (SEM) and Energy Dispersive X-Ray Spectroscopy (EDX). According to the results of UV-Visible, the absorption spectroscopy has displayed that the band gap is 3.5 eV. The biological properties were studied for prepared NiO-NPs. The antibacterial testes were examined using different bacterial strains such as Escherichia coli, Staphylo-coccus aureus and Staphylococcus Epidermis and dose-dependent inhibition response was reported. The tribological tests are carried out using four ball testers in accordance with ASTM D4172-18 requirements. NiO-NPs are utilised as lubricating additives in poly alpha olefin (PAO4) base oil. NiO-NPs in PAO4 at a concentration of 0.5 wt% improved the coefficient of friction, and positive results are observed.

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