Fast and Eco-friendly Microwave-Assisted Synthesis of Silver Nanoparticles using Rosemary Essential Oil as Renewable Reducing Agent

Year: 2017

Authors: Gonzalez-Rivera Jose; Duce Celia; Ierardi Vincenzo; Longo Iginio; Spepi Alessio; Tine Maria Rosaria; Ferrari Carlo

Autors Affiliation: UOS Pisa, Natl Res Council, Natl Inst Opt INO, Via G. Moruzzi 1, I-56124 Pisa, Italy; Univ Pisa, Dept Chem & Ind Chem, Via G Moruzzi 3, I-56124 Pisa, Italy; Univ Genoa, Phys Dept DIFI, Nanomed Labs, Largo R Benzi 10, I-16132 Genoa, Italy

Abstract: A green and fast methodology was developed to synthesize silver nanoparticles using rosemary essential oil (EO) as a renewable reducing agent. The synthesis process was microwave (MW) assisted, using a coaxial dipole antenna immersed into the reaction medium. This configuration was used to promote both: i) rosemary EO extraction by hydrodistillation, and ii) silver nanoparticle synthesis in an aqueous solution at atmospheric pressure. The effect of two different silver salt substrates and the time reaction on the morphology of the silver nanoparticles was explored. The coaxial microwave-assisted hydrodistillation of rosemary yields 0.4% (w/w) in 30 min and contains ethers (17%), ketones (50%) and alcohols (15%). Silver nanoparticles with a tuneable particle size (from 7 to 18 nm) and morphology (from spherical to round-like shapes) were obtained in reaction times ranging from 2 to 30 min. The nanoparticle formation was followed by UV-vis spectroscopy and SEM imaging.


Volume: 2 (6)      Pages from: 2131  to: 2138

KeyWords: Essential oil, Microwave, Nanoparticles, Silver
DOI: 10.1002/slct.201700244