Hylotelephium telephium Flower Extract-Mediated Biosynthesis of CuO and ZnO Nanoparticles with Promising Antioxidant and Antibacterial Properties for Healthcare Applications

The present work mainly concentrates on the biosynthesis of copper oxide (CuO) nanoparticles (NPs) and zinc oxide (ZnO) nanoparticles using Hylotelephium telephium subsp . telephium flower extract. XRD study confirms the formation of monoclinic CuO NPs and hexagonal ZnO NPs. SEM and TEM analyses show that the CuO NPs were spherical in shape of 83 nm in size, whereas the ZnO NPs were irregular in shape of 36 nm in size. The synthesized nanoparticles have excellent antioxidant and antibacterial activities. The antioxidant activity results reveal that the synthesized nanoparticles exhibit excellent free radicals scavenging activity. A comparative study on the antibacterial activity of the chemically synthesized nanoparticles and biosynthesized nanoparticles was conducted and it was found that the biosynthesized nanoparticles possess better activities than the chemically synthesized nanoparticles. Hence, biosynthesis is a more advantageous and reliable method when compared to chemical synthesis for the production of nanoparticles for antibacterial applications.