Rapid green synthesis of CuO nanoparticles and evaluation of its photocatalytic and electrochemical corrosion inhibition performance

This research work demonstrates the photocatalytic activity and anticorrosive behaviour of Copper oxide nanoparticles (CuO NPs) which was synthesized by the green synthesis method using Moringa oleifera leaf extract as reducing and capping agents. The prepared CuO NPs have been elaborately characterized by various techniques namely X-Ray Diffraction (XRD) analysis, Field Emission Scanning Electron Microscopy (FESEM), Thermogravimetric analysis (TGA), and Bruner Emitter Teller surface area analysis (BET). The outstanding photocatalytic degradation properties of CuO NPs toward decolouration of Pararosaniline (PRA) dye solution under sunlight irradiation were also studied. The prepared CuO NPs was coated on the surface of the mild steel (MS) plate by a spin coating method. Electrochemical impedance spectroscopy (EIS) and Tafel plot show that the CuO NPs coated MS plate exhibits nearly 56% of improved anticorrosive behaviour under the 3.5% NaCl electrolyte compared with uncoated MS plate. (c) 2021 Elsevier Ltd. All rights reserved. Selection and peer-review under responsibility of the scientific committee of the International e -Conference on Advancements in Materials Science and Technology.

Automated summary

This study synthesized copper oxide nanoparticles using a green synthesis method and characterized their properties. The CuO NPs showed excellent photocatalytic degradation performance under sunlight and improved anticorrosive behavior when coated on mild steel plates.