Bio synthesis and characterization ofNi doped CuO nanocompositeusingCentratherum punctatumleaf extract

Pristine and Nickel doped Copper Oxide (CuO) nanocomposite were synthesized using Centratherum Puncta-tum leaf extract. The structural characterization is performed employing XRD, SEM, and EDAX. Pure CopperOxide nanoparticles (CuO Nps) exhibit leaf-like morphology, but Nickel-doped Copper Oxide nanocompos-ites exhibit a mixture of rod, spherical and hexagonal morphology. Owing to the XRD data, the resultingparticles for NiO NPs, CuO NPs, and Ni-doped CuO nanocomposite comprised crystallite sizes of 35 nm,41 nm, and 37 nm, respectively. The optical properties and functional group of the materials are analyzedutilizing UV-Vis and FTIR. The rise in the measured optical band gap values was seen by the blue shift notedin the UV-vis study subsequent to nickel doping. The existence of different functional groups in samples isverified by FT-IR characterization. The electrochemical analysis is studied by cyclic voltammetry. It exhibitsan elevated specific capacitance value of 314 F/g for Ni doped copper oxide nanocomposite. The antibacterialactivity studies reveal that the Ni-doped nanocomposite is active against gram-negative bacteria over andabove the gram-positive bacterial species.