Tuning the traits of nickel oxide nanoparticles employing green synthesis using Brassica oleracea L. var. capitata for exploring the antimicrobial, anticancer and supercapacitor applications

Abstract

The Nickel Oxide (NiO) nanoparticles are synthesized using green synthesis method utilizing  Brassica oleracea L. var. capitata leaf extracts. The X-ray diffraction studies revealed that synthesized NiO-NPs exhibits face centered cubic structure. SEM images of NiO-NPs exhibited agglomerated structures. TEM images of NiO-NPs revealed spherical morphology with variable size ranging from 5-50 nm. FT-IR spectrum was used to confirm the various functional group. The absorbance spectral studies reveal existence of three important peaks at wavelength 545 nm, 589 nm and 636 nm. The antibacterial activity of NiO-NPs against Gram +ve Staphylococcus aureus (NCIM2079), Bacillus subtilis (NCIM2250) and Gram –ve Pseudomonas aeruginosa (MTCC3541), Escherichia coli (NCIM2065) was further studied. Anticancer activity of NiO-NPs against lungs cancer cell (NRU-A549) was examined. The IC₅₀ value was found to be 326.4 µg/ml. The synthesized NiO-NPs were further studied for electrochemical and supercapacitor application.