A completely green approach to the synthesis of dendritic silver nanostructures starting from white grape pomace as a potential nanofactory

Publication date: Available online 14 August 2018Source: Arabian Journal of ChemistryAuthor(s): Katya Carbone, Mariano Paliotta, Laura Micheli, Claudia Mazzuca, Ilaria Cacciotti, Francesca Nocente, Alessandra Ciampa, Maria Teresa Dell'AbateAbstractA simple, eco-friendly, cost-effective and rapid microwave-assisted method has been developed to synthetize dendritic silver nanostructures, composed of silver nanoparticles (AgNPs), using white grape pomace aqueous extract (WGPE) as both reducing and capping agent. With this aim, WGPE and AgNO3 (1mM) were mixed at different ratio, and microwave irradiated at 700 watt, for 40 s. To understand the role of bioactive compounds involved in the green synthesis of AgNPs, preliminary chemical characterization, FT-IR analysis and 1H-NMR metabolite profiling of WGPE were carried out. The effects of bioactive extract concentration and stability over time on AgNPs formation were also evaluated. WGPE-mediated silver nanostructures were then characterized by UV-vis, FTIR analyses, and scanning electron microscopy. Interestingly, the formation of dendritic nanostructures, originated from the self-assembly of Ag rounded nanoparticles (average diameter of 33 ± 6 nm), was observed and ascribed to the use of microwave power and the presence of organic components within the used WGPE, inducing an anisotropic crystal growth and promoting a diffusion-limited aggregation mechanism. The bio-dendritic synthetized nanostructures were also evaluated for pot...
Source: Arabian Journal of Chemistry - Category: Chemistry Source Type: research