Green Synthesis of Copper Oxide Nano nano and use it in corrosion protection of copper seals

The research deals with studying the green composition of copper oxide nano and its use as a protective coating against corrosion for some historical seals, with the restoration of these historical seals and understanding the mechanism of corrosion and damage and isolating them with a nano-composite, which is the goal that the research seeks. The study was conducted by making a green manufacturing of copper oxide nanoparticles using an aqueous extract of pomegranate peels, drying and grinding them well, then mixing them with copper sulfate to produce copper oxide nanoparticles, as the biological compounds present in pomegranate peels reduce and stabilize copper oxide nanoparticles. The resulting copper oxide nanoparticles were examined by a transmission microscope, which showed that the size of the nanoparticles ranged between 15:20nm and the scanning electron microscope (SEM), which showed the crystallization of spherical copper oxide nanoparticles. By analyzing the copper oxide nanoparticles produced from the pomegranate peel extract by X-ray diffraction (ERD), clear signals of the presence of copper oxide were shown, and their analysis by X-ray diffraction (EDX) showed the presence of oxygen, copper, and the elements of the biological compounds present in pomegranate peels. Infrared analysis showed the presence of the hydroxyl group and the presence of the C=C group resulting from the plant compound of the pomegranate peel and the presence of the Cu-O bond, which indicates the presence of copper oxide nanoparticles at the wavelength 562cm-1. The process of seal restoration was done by photographic documentation, then examination and analysis of the seal samples was done by examining using a portable light microscope to study the surface of the sample and the shape of the corrosion layer, and analysis using X-ray diffraction XRD to identify the corrosion compounds that showed copper oxides and copper chlorides that indicate the presence of bronze disease on the surface of the copper seals.