Synthesis of nickel oxide nanoparticles using plant leaf extract of their antibacterial, and anti-oxidant activity

This present work employed a straightforward, green synthesis methods to produce nickel oxide
nanoparticles (NiONPs) utilizing the leaf extract from the green plant. The synthesized NPs underwent
thorough characterization methods with UV-Visible spectroscopy (UV-Vis), Fourier transform infrared
spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), energydispersive
X-ray spectroscopy (EDAX), and transmission electron microscopy (TEM) analysis
indicated the NiO NPs were predominantly monoclinic, cubic and hexagonal in shape, exhibiting high
purity, has a general crystalline size ranging from 25 to 10 nm. Green-synthesised NiO NPs exhibited
excellent 1,1-diphenyl-2-picryl hydrazyl (DPPH) free radical scavenging activity and interesting
antibacterial activity against gram-positive and gram-negative bacteria. Notably, the results indicated
that the extract from plants can produce NiO NPs with promising effects for use in the field of
biological applications.