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A novel efficient magnetic core-zeolitic shell nanocatalyst system: preparation, characterization and activity

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Abstract

Analcime shell-nickel ferrite core microspheres were decorated with Pd and Pt nanoparticles with the aid of an ionic liquid, 1-butyl-3-methylimidazolium hexafluorophosphate (BMIM-PF6). The samples thus prepared were characterized using X-ray powder diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray (EDX), nitrogen adsorption-desorption isotherms, transmission electron microscopy (TEM) and vibrating sample magnetometer (VSM) methods. The XRD patterns confirmed the growth of a zeolitic layer on the surface of the magnetic cores. The thermogravimetric analysis (TGA) curve clearly indicated the thermal decomposition of the loaded IL, which confirmed the presence of BMIM-PF6 in the structures. In addition, EDX analysis indicated that the samples contained 2.5 mass % of noble metal. The metallic species can be adsorbed on the modified surface and/or penetrate into the zeolitic channels in the structures. The results indicate that the X-IL/An/S/NF (X = Pt or Pd) metallic nanoparticles supported core-shell catalysts-samples were able to catalyse the selective oxidation of cyclohexene to 2-cyclohexene-1-ol under the induced conditions. The catalysts continued to be active after recycling up to 5 times. Eventually, a suitable mechanism was proposed for the selective oxidation of cyclohexene over the catalysts.

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Authors and Affiliations

  1. Institute for Biotechnology and Environment (IBE), Sharif University of Technology, Azadi Ave., P.O.Box 11365-9516, Tehran, Iran

    Mohsen Padervand & Manouchehr Vossoughi

  2. Department of Chemical Engineering and Petroleum, Sharif University of Technology, Azadi Ave., P.O.Box 11365-9516, Tehran, Iran

    Mohsen Padervand & Manouchehr Vossoughi

  3. Department of Life Science Engineering, University of Teheran, Enghelab St., P.O. Box 14178-63177, Teheran, Iran

    Behdokht Janfada

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  1. Mohsen Padervand
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  2. Manouchehr Vossoughi
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  3. Behdokht Janfada
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Correspondence to Mohsen Padervand.

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Padervand, M., Vossoughi, M. & Janfada, B. A novel efficient magnetic core-zeolitic shell nanocatalyst system: preparation, characterization and activity. Chem. Pap. 69, 856–863 (2015). https://doi.org/10.1515/chempap-2015-0089

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  • DOI: https://doi.org/10.1515/chempap-2015-0089

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