Abstract
Stable silver nanoparticles were synthesized with the aid of a novel, non-toxic, eco-friendly biological material namely, green pepper extract. The aqueous pepper extract was used for reducing silver nitrate. The synthesized silver nanoparticles were analyzed with transmission electron microscopy (TEM), X-ray diffraction (XRD) and energy dispersive spectrometer (EDS). TEM image shows the formation of silver nanoparticles with average particle size of 20 nm which agrees well with the XRD data. The main advantage of using pepper extract as a stabilizing agent is that it provides long-term stability for nanoparticles by preventing particles agglomeration. To investigate the electrocatalytic efficiency of silver nanoparticles, silver nanoparticles modified carbon-paste electrode (AgNPs–CPE) displayed excellent electrochemical catalytic activities towards hydrogen peroxide (H2O2) and hydrogen evolution reaction (HER). The reduction overpotential of H2O2 was decreased significantly compared with those obtained at the bare CPE. An abrupt increase of the cathodic current for HER was observed at modified electrode. Also, the antibacterial activity of silver nanoparticle was performed using Escherichia coli and Salmonellae. The approach of plant-mediated synthesis appears to be cost efficient, eco-friendly and easy methods.
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Published in Russian in Elektrokhimiya, 2016, Vol. 52, No. 10, pp. 1079–1084.
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Vatandost, E., Chekin, F. & Shahidi Yasaghi, S.A. Green synthesis of silver nanoparticles by pepper extracts reduction and its electocatalytic and antibacterial activity. Russ J Electrochem 52, 960–965 (2016). https://doi.org/10.1134/S102319351610013X
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DOI: https://doi.org/10.1134/S102319351610013X