Nanocomposites and nanomaterials

Preparation, characterization and antibacterial properties
of “green” synthesis of Ag nanoparticles and Ag-NPs/Kaolin composite
Vorobyova V.I.1, Vasyliev, G. S.1, Pylypenko, I.V.1
1 National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”. Prosp. Peremohy-03056, 37, Kyiv, Ukraine.
E-mail: g.vasyliev@kpi.ua
Green synthesis of Ag nanoparticles (Ag-NPs) is an actual research trend in green nanotechnology as this method is nontoxic or less toxic, eco-friendly, efficient, and cost-effective as compared to other conventional physical and chemical methods. Silver nanoparticles are prevalent in various fields of chemical technology for applications as antimicrobials, catalytic agent for water purification and other. Many researches focused on the stabilization of Ag-NPs on adsorbent materials, including cellulose fiber, montmorillonite, activated carbon and kaolinite [1-2].
The current research is aimed at developing eco-friendly method for the synthesis of AgNPs using aqueous apricot and blackcurrant pomace extracts and subsequent impregnated on adsorbent material (Kaolinite (Al₂SiO₅(OH)₄)) and evaluation of the effects of antibacterial activity.
The AgNPs were characterized by zeta-potential measurements and UV–Vis spectroscopy (absorption peak at 432 nm), scanning electron microscopy and Fourier Transform Infrared spectroscopy (FTIR). The antimicrobial activity of AgNPs and Ag-NPs/Kaolin was tested against Escherichia coli using the agar diffusion and optical density method.

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