Abstract
An environmentally friendly green approach for the synthesis of NiO nanoparticles was developed using orange leaf extract. The XRD exhibits formation of cubic crystalline structure. FTIR spectroscopy revealed the vibrational stretching mode of Ni-O bond. The FE-SEM image show some agglomerations of spherical and like oval nanoparticles. The presence of Ni and O peaks in the EDX spectrum indicated the presence of NiO phase with other impurities such as C, Cl, N, and Fe. Furthermore, the NiO nanopartcles obtained demonstrated significant antibacterial activity against both positive-gram (staphylococcus aureus) and negative-gram (Escherichia coli) bacteria.
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