Green synthesis of metal oxide nanoparticles and their dispersion on a polymer matrix and study their biological activity

Abstract

Metallic nanoparticles (NPs) have enormous applications due to their remarkable physical and chemical properties. The synthesis of NPs has been a matter of concern because chemical methods are toxic. This study consists of two parts: The first part is the use of the leaves of the Iraqi lemon plant to prepare three metal oxides nanoparticles: copper oxide nanoparticles (CuO  NPs), cobalt oxide nanoparticles (CoO NPs) and cadmium oxide nanoparticles (CdO NPs), which were analyzed using XRD, AFM, FESEM and FTIR spectroscopy. The second part is the dispersal of the nano-oxides prepared in the first part of the study on the surface of a polymer that was randomly selected for forming a binary compesite from a metal oxide nanoparticles / polymer. X-ray diffraction (XRD) analysis confirmed the pure single-phase cubic structure of green synthesized CdO NPs, the size of nanoparticles was 102 nm. The biological activity of metal oxides nanoparticles has excellent for B1, in concentration 25 µg/mL gave a higher diameter than the concentration of 50 µg/mL. While the compound B5, it gave an identical effect diameter for both concentrations used, amounting to (40 mm). We also note that the compound B6, at a concentration of 25 µg/mL, gave a larger diameter of (60 mm) compared to the concentration of 50 µg/mL. In contrast, the compound B7, at a concentration of 25 µg/mL, gave a smaller area compared to the concentration of 50 µg/mL. Moreover, during the green synthesis, unreacted metals are drained, which causes contamination to the ecosystem.