Simultaneous preparation of Ag/Fe<inf>3</inf>O<inf>4</inf>core-shell nanocomposites with enhanced magnetic moment and strong antibacterial and catalytic properties

Publication Type:
Journal Article
Citation:
Chemical Engineering Journal, 2013, 226 pp. 243 - 254
Issue Date:
2013-06-15
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In this study, core-shell Ag/Fe3O4nanocomposites have been successfully prepared by modified co-precipitation route followed by facile hydrothermal treatment in one-pot synthesis under various (Ag(NH3)2+) ion concentrations without adding any reducing agents. A single crystal Ag core and polycrystallized Fe3O4shell nanostructures could be obtained when high amount of AgNO3precursor are used in the presence of Fe2+ions source, i.e., ferrous salt alone. A mechanism leading to the formation of such morphologies was proposed and samples were characterized with several analytical techniques including field emission scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Fourier-transform infrared (FT-IR) spectroscopy. Significant increase of saturation magnetic moment was observed for the Ag/Fe3O4nanocomposite. The results showed enhanced magnetic moment and strong catalytic and antibacterial activities of the present Ag/Fe3O4nanocomposite, demonstrating its importance for potential application in water treatment and biomedical application, with the ability of subsequent removal by means of an external magnetic field. © 2013 Elsevier B.V.
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