GREEN SYNTHESIS OF SILVER NANOPARTICLES FROM EXTRACT OF PADINA TETRASTROMATICA LEAF

Abstract

The synthesis, characterization and application of biologically synthesized nanomaterials are an important aspect in nanotechnology. The present study deals with the synthesis of silver nanoparticles (Ag-NPs) using the aqueous extract of brown seaweed Padina tetrastromatica leaf extract. The complete reduction of silver ions was observed after 72 h of reaction at 300 oC under shaking conditions. The colour changes in reaction mixture (pale yellow to dark brown) was observed during the incubation period, because of the formation of silver nanoparticles in the reaction mixture enables to produce particular colour due to their specific properties. The formation of Ag-NPs was confirmed by UVVisible Spectroscopy, X-Ray Diffraction (XRD) pattern, Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM) with Energy dispersive X-ray (EDX) patterns. The synthesized Ag-NPs were predominately spherical in shape and polydispersed. Fourier Transform Infra-Red (FT-IR) spectroscopy analysis showed that the synthesized nano-Ag was capped with bimolecular compounds which are responsible for reduction of silver ions. The approach of plant-mediated synthesis appears to be cost efficient, eco-friendly and easy alternative to conventional methods of silver nanoparticles synthesis.