Synthesis and characterization of magnetic dichromate hybrid nanomaterials with triphenylphosphine surface modified iron oxide nanoparticles (Fe3O4@SiO2@PPh3@Cr2O72-)

In this study, a new magnetic hybrid nanomaterials Fe3O4@SiO2@PPh3@Cr2O72- is introduced. First, the magnetic Fe3O4 nanoparticles have been synthesized by co-precipitation method. Then, tetraethyl orthosilicate has been used for production of core shell nanoparticles Fe3O4@SiO2. The core-shell magnetic nanoparticles system Fe3O4@SiO2 functionalization was synthesized using (3-chloropropyl) trimethoxysilane and triphenylphosphine and the cationic part was prepared for immobilization of anionic part of the Cr (VI) catalysts including Cr2O72-. After immobilization of the catalyst, its structure was detected by using Fourier transform infrared (FT-IR), solid state UV-Vis, elemental analysis, X-ray fluorescence (XRF), X-ray diffraction (XRD) and the particle size and morphology were elaborated by scanning electron microscope (SEM) and XRD. Magnetism properties were quantified by vibrating sample magnetometer (VSM). (C) 2013 Elsevier Masson SAS. All rights reserved.