Optimization of Reaction Conditions for Green Synthesis of Silver Nanoparticles Using Coffea arabica Leave Extract

Abstract

Present study describes a rapid and eco-friendly synthesis of silver nanoparticles (AgNPs) using Coffea arabica leaf extract in single process via green Chemistry. We have successfully synthesized AgNPs using Coffea arabica leaf as a reductant and a capping or stabilizing agent through green chemistry. In the typical synthesis of AgNPs, Coffea arabica  leaf extract was added into aqueous solution of AgNO3 in a conical flask at 800C temperature. Different reaction concentrations of Coffea arabica extract and AgNO3 solution were subjected. AgNPs were synthesized by using aqueous silver nitrate solution as a precursor with aqueous solution of Coffea arabica leaf extract as the reductant and stabilizing agents. The AgNPs were characterized using Fourier transform infrared spectroscopy (FTIR), X-Ray Diffraction (XRD), Atomic Absorption Spectroscopy (AAS) and UV-Vis spectroscopy. The optimum conditions for this process were a temperature of 80°C, pH 9, and reactant ratio 1:4. XRD results reveal that, the green synthesis yields stable, face centered cubic structure AgNPs with a sizes range of 39.664-24.708 nm. Preparation of AgNPs using plant extracts are eco-friendly, biocompatible and cost effective. The synthesis method applied in this study involved the application of the green chemistry principles which emphasizes on the use of nontoxic solvents and reagents to protect the environment. AgNPs have a vital role in different nanotechnology-based processes because of their unique characteristics and can be exploited on a large scale for medical application.