Abstract
The work reported for the first time in this article describes the kinetic study of silver nanoparticles formation using Phyllanthus emblica amla extract. The synthesized silver particles exhibit an intense surface plasmon resonance band in the visible region at 455 nm. The variation in concentrations of amla extract, Ag+ ions, cetyltrimethyl ammonium bromide (CTABr), and reaction time play crucial roles for nucleus formation and the growth processes. The Ag+ ions reduction into metallic Ag0 is due to the presence of polyphenolic groups in the amla extract and thereafter, their agglomeration into nanoparticles. Due to the formation of spherical Ag-nanoparticles there is a appearance of a sharp surface plasmon resonance band in the UV–visible region. Silver nanoparticles (AgNPs) were characterized by TEM, XRD and FTIR techniques.
•This paper contains the effect of CTABr (surfactant) on the kinetics of formation of silver nanoparticles by Amla extract.•The mixing of Amla extract with silver nitrate solution yielded orange color with maximum wavelength (λmax) at 455 nm.•The changes in the CTAB concentrations influence the rate of reaction.•The polyphenolic groups present in the Amla extract are accountable for the reduction of silver ions (Ag+) into Ag0 metallic.