Green synthesis of Silver oxide nanoparticles using Zephyranthes Rosea flower extract and evaluation of biological activities

Bio-nanotechnology is an effective technique for the synthesis of nanoparticles in a greener approach without affecting the environment. The present research provides the in-vitro synthesis of Zephyranthes Rosea flower extract substituted silver oxide nanoparticles by a greener approach for the first time. The formation of the face centered cubic structure of Ag2O NPs was confirmed by X-ray diffraction (XRD) pattern. The synthesized nanoparticles were characterized by X-ray Photoelectron Spectroscopy (XPS) analysis to confirm the chemical states and purity of Ag and O. The optical absorption peak of the nanoparticle was found to be at 420 nm and optical emission peaks were observed at 412 nm, 485 nm, and 530 nm. The bandgap energy of the Ag2O NPs was found to be 2.48 eV. The morphology of the nanoparticles was found to be spherical with the particle size about 10 - 30 nm and the lattice inter-planar spacing was found to be 0.222 nm. Ag2O NPs Zephyranthes Rosea were found to be a potential candidate for the antibacterial activity against the strains of Escherichia coli., Streptococcus mutants, and Staphylococcus aureus. The antioxidant activity of Ag2O NPs was found to be 73.82 % at 100 mu g/mL with the standard drug of ascorbic acid. The anti-inflammatory activity of the Ag2O NPs was found to be 97.19 % at 500 mu g/mL using the BSA denaturation technique. The anti-diabetic activity of the Ag2O NPs was tested by alpha-amylase assay and the inhibition percentage was found to be 75.7 % at 500 mu g/mL.