Nanocomposites and nanomaterials

Green and environmentally sustainable fabrication of silver nanoparticles and Ag-SnO2 nanocomposites and its efficacy as photocatalyst

Skiba M.I.1, Vorobyova V.I.2, Dontsova T.A.2
1 Ukrainian State University of Chemical Technology, 
Gagarinа ave. 8, Dnipro 49005, Ukraine
E-mail: Margaritaskiba88@gmail.com
2National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute", Peremohy ave. 37, Kyiv 03056, Ukraine

Dispersion of silver nanoparticles (Ag NPs) were prepared by chemical redaction using plasma-chemical obtained Grape pomace extract as a natural reducing and stabilizing agent. Ag NPs were characterized by UV-visible spectroscopy, X-ray diffraction (XRD) and scanning electron microscopy (SEM). The average size of formed Ag NPs is 30-55 nm. XRD analysis revealed that the particles were face-centred cubic. Silver NP has successfully been decorated on SnO2 nanoparticles to structure the Ag-SnO2 composites by impregnation of SnO2 samples with as synthesized nanoparticles. The difference of structure and properties between SnO2 and composite was characterized by XRD, UV–vis spectroscopy, Brunauer. Emmett. Teller (BET) analysis. Compared to bare SnO2, the surface modified photocatalysts (Ag–SnO2) showed a red shift in the visible region. The photocatalytic activity was monitored via the degradation of rose bengal (RB) dye and the results revealed that Ag–SnO2 shows better photocatalytic activity than that of SnO2. The effect of photocatalyst concentration, initial dye concentration and electron scavenger on the photocatalytic activity was examined in detail.
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