Scientific Results

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

Year: 2017

Authors: Gonzalez-Rivera J., Duce C., Ierardi V., Longo I., Spepi A., Ferrari C., Tine, MR.

Autors Affiliation: National Institute of Optics (INO)-UOS Pisa
National Research Council of Italy (C.N.R.)
Via G. Moruzzi 1, 56124 Pisa (Italy)
Department of Chemistry and Industrial Chemistry
University of Pisa Via G. Moruzzi 3, 56124 Pisa (Italy)
Nanomed Labs, Physics Department (DIFI)
University of Genova Largo R. Benzi 10, 16132 Genova (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.

Journal/Review: CHEMISTRY SELECT

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

More Information: This work was supported by the PRIN 2010–2011 (n.2010C4R8 M8) and FIRB 2012 (n. RBFR12ETL5), projects funded by the Italian Ministry of University and Research, and by the PRA_2015_0050 and PRA_2016_46, projects funded by the University of Pisa. Dr. J. Gonzalez-Rivera would like to thank the Thermolab and Department of Chemistry and Industrial Chemistry (University of Pisa) for funding his postdoctoral fellowship program. The authors would like to thank Dr. A. Piras (University of Cagliari, Italy) and Dr. Falconieri (Istituto tecnico Industriale Statale “Michele Giua”, Cagliari, Italy) for the GC and GC-MS analysis. The authors would also like to thank C. Lanza,
F. Pardini and A. Barbini (INO-CNR) for their valuable technical support.
Conflict of
KeyWords: Essential oil; Microwave; Nanoparticles; Silver;
DOI: 10.1002/slct.201700244

Citations: 2
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