GREEN-SYNTHESIS OF SILVER NANOPARTICLES: SPECTRAL, OPTICAL, AND ANTIBACTERIAL CHARACTERIZATION STUDIES

Abstract

A green approach was used for synthesizing Silver-NPs by the extract of Artocarpus heterophyllus leaves. The effect of Artocarpus heterophyllus leaf extract was investigated. A powder XRD study has been used to analyze the structure and particle size of as-synthesized Ag-NPs. According to the powder-XRD study, the as-prepared Silver-NPs possess an FCC structure and have a particle size of 23nm. The possible bio-reducing agents within the leaf extracts were confirmed using FTIR spectral analysis. The characteristic surface plasmon resonance signal of the as-synthesized silver nanoparticles was detected at 418 nm using UV–Vis spectroscopic analysis between the wavelength range of 300 and 800nm. An emission peak was observed at 472nm in the PL investigation, indicating the fluorescent emission of Ag-NPs. The FESEM analysis has been exploited to inspect the morphological aspect of biosynthesized silver-NPs. According to FESEM micrographs, the biosynthesized NPs were found to have spherical shapes. Using the agar-well process, the antibacterial efficacy of biosynthesized Silver-NPs was examined. The prepared Silver-NPs exhibited a better antibacterial efficacy against E.coli than against S.typhi. It's also been observed that when the concentration increased, the antibacterial activity increased as well.