Abstract
Fe3O4/SiO2 core-shell hybrid nanoparticles covalently attached to graphene oxide (Fe3O4/SiO2/PTS-GO) were prepared and fully characterized using different techniques including Fourier transform infrared (FTIR) spectroscopy, X-ray powder diffraction (XRD), field emission scanning electron microscopy (FESEM), energy dispersive X-ray (EDX) spectroscopy, transmission electron microscopy (TEM) and atomic force microscopy (AFM). The efficiency of Fe3O4/SiO2/PTS-GO nanocomposite was demonstrated in trimethylsilyl cyanide (TMSCN) addition to a wide range of aldehydes and ketones in high to quantitative yields under extremely mild conditions. Low catalyst loading, reusability of the catalyst, avoiding the use of any hazardous solvent, short reaction time at ambient temperature and straightforward work up procedure are some of the attractive advantages of this protocol.
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