Synthesis of graphene oxide supported copperأ¢â‚¬â€œcobalt ferrite material functionalized by arginine amino acid as a new highأ¢â‚¬â€œperformance catalyst
چکیده
A novel Cu0.5Co0.5Fe2O4@Argأ¢â‚¬â€œGO catalytic system was successfully prepared by immobilization of copper substituted cobalt ferrite nanoparticles on arginineأ¢â‚¬â€œgrafted graphene oxide nanosheets, in which ferrite moiety acts as an oxidation catalyst and arginine has the role of base catalyst. Also, arginine amino acid was used to modify the surface of graphene oxide nanosheets which the prepared support can improve dispersion and uniform loading of nanoparticles. The prepared nanocomposite was characterized by flame atomic absorption spectroscopy (FAAS), inductively coupled plasma optical emission spectrometer (ICPأ¢â‚¬â€œOES), energy dispersive spectroscopy (EDS), Fourier transform infrared spectroscopy (FTأ¢â‚¬â€œIR), ultravioletأ¢â‚¬â€œvisible spectroscopy (UVأ¢â‚¬â€œvis), Raman spectroscopy, thermogravimetric analysis (TGA), xأ¢â‚¬â€œray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) analysis. The prepared Cu0.5Co0.5Fe2O4@Argأ¢â‚¬â€œGO nanocomposite was used as an efficient catalyst for oneأ¢â‚¬â€œpot tandem oxidative synthesis of 2أ¢â‚¬â€œphenylbenzimidazole derivatives in good yields. Copyright ط¢آ© 2017 John Wiley & Sons, Ltd.