Enhanced Anti-Corrosion Efficiency and Antimicrobial Properties of Green Synthesised Nickel Oxide (NiO) Nanoparticles

Abstract

The numerous treatments for nano particles in the interdisciplinary field of biomedical self-discipline cannot be counted. Many researchers in biomedicine are intrigued by metallic-based nano particles. Several methods for synthesizing metal nano particles are under investigation, and green synthesis is considered a presumed choice due to its environmentally benign nature, safety from harmful chemicals, and economically favorable for synthesis. The target of the current research include the synthesis of nickel oxide nano particles (NiO NPs) through green route by using the extract prepared from the bark of Acacia Nilotica, and the analysis of its characteristics using XRD, SEM, EDAX, IR, UV-VIS, Photo luminescence spectra, microbial activity, mass loss scheme and electrochemical techniques. The diffraction analysis using X-ray (XRD) indicates the presence of NiO2 compound in the prepared nano particles. The Fourier transform Infrared spectroscopy (FTIR) confirmed the association of peaks with the C-H and Ni-O bonds present. The micro images from Scanning Electron Microscope (SEM) exhibited cubic cluster morphology on its surface. The UV Vis spectra showed a maximum absorption at 264 nm. The Photoluminescence spectrum demonstrated that the green synthesized NPs of NiO has a modified emission band due to the presence of oxygen deficiencies and induced surface imperfections. A study on its microbial application confirms that the prepared NiO NPs have a great potential for inhibition against bacteria such as S. aureus and E. coli and also instrumental against microorganic fungi, Candida albicans and A. niger. The mass loss system shows a restraint effectiveness of 93.68 percent in carbon steel and the electrochemical study supports the formation of a defensive protective layer on the cathodic locales of the carbon steel surface.