Effect of cobalt doping on antimicrobial, antioxidant and photocatalytic activities of CuO nanoparticles

Copper oxide nanoparticles doped with 3 %, 5 %, and 7 % cobalt have been prepared via the green method using Annona muricata leaf extract to find their antimicrobial, antioxidant and photocatalytic activities. The synthe-sized nanoparticles was analysed by XRD, FTIR, XPS, EDX, SAED, HRTEM, SEM and UV-Visible techniques. XRD pattern indicate all nanoparticles had single-phase monoclinic structure. Functional groups present in the samples were confirmed by FTIR analysis. The incorporation of Co2+ ions into CuO lattice were identified by XPS analysis. Morphological changes of nanoparticles were confirmed by SEM and HRTEM micrograph. Chemical composition of elements were confirmed by EDX spectra. Antimicrobial efficiency of pure and cobalt doped CuO nanoparticles was identified by their zone of inhibition of bacterial and antifungal strains. Moreover, the green synthesized CuO nanoparticles have considerable antioxidant action. Further, the photocatalytic performance of pure and cobalt doped CuO nanoparticles was done by the degradation of methylene blue.