Nanocomposites and nanomaterials

Green synthesis of silver nanoparticles using grape pomace extract obtained by betaine-based deep eutectic solvent
Vorobyova V.I. 1, Vasyliev, G. S. 1, Kotyk M.M. 1, Skiba M.I.2
1 National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”. Prosp. Peremohy 37, Kyiv 03056, Ukraine.
2 Ukrainian State University of Chemical Technology, Gagarin Ave. 8, Dnipro 49005, Ukraine.
E-mail: g.vasyliev@kpi.ua
Green synthesis of silver nanoparticles is an emerging technique drawing more attention recently because of several advantages over the conventional chemical approaches. This study investigated the rapid and green synthesis of silver nanoparticles (AgNPs) using the grape pomace extract obtained by betaine-based deep eutectic solvent. New deep eutectic system (Betaine – Lactic acid) was prepared, its electrochemical properties were studied. The grape pomace extract was obtained by maceration and used as a reducing and capping agent in the synthesis of nanoparticles. The obtained nanoparticles were characterized with UV–Vis spectrometry that showed the SPR band at around 415 nm, which proves AgNP formation. SEM images verified the presence of spherical nanoparticles with no evidence of aggregations. Antimicrobial properties of AgNPs were tested and showed strong antibacterial activity against E. coli.

Fig. 1 SEM microphotographs of AgNPs obtained with grape pomace extract in deep eutectic solvent