Abstract
Nickel oxide nanoparticles [NiO NPs] were synthesized using chemical (Combustion method) and green route using Coccania grandis leaf extract (Probe sonication method). SEM reveals that, NiONPs synthesized using green route showed agglomerated porous, having diameter of 200 nm. Whereas, chemically synthesized NiO NPs were uniform in size with diameter of 180 nm. From PXRD analysis, average crystallite size of green and chemically synthesized NiONPs was found to be 52.6 nm and 41.9 nm respectively. NiO NPs synthesized using the green route. Antibacterial study of NiONPs (synthesized by green route) displayed maximum zone of inhibition i.e10.8mm (Staphylococcussp), 9.4mm (E coli) and 7.4mm (Pseudomonas) compared to 8mm (Staphylococcussp), 9mm (Ecoli). Photocatalytic activity of direct green dye was effective in NiO NPs synthesized by chemical (69.25%) compared to the green route (25.65%). In electrochemical analysis (biosensor), one reduction and one oxidation peak were observed and were highly effective in sensing Fe3+ under alkaline medium in green route NiO NPs.
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