Preparation and characterization of magnetic chlorochromate hybrid nanomaterials with triphenylphosphine surface-modified iron oxide nanoparticles

In this paper, a new magnetic hybrid nanomaterial (Fe3O4@SiO2@PPh3@[CrO3Cl]) was reported for the first time. The magnetic Fe3O4 nanoparticles were prepared by hydrothermal process and coated with a silica shell. Then, the core–shell nanoparticles (Fe3O4@SiO2) were functionalized by 3-chloropropyl trimethoxysilane plus triphenylphosphine for forming the cationic part of support. Finally, anionic part of the Cr(VI) catalyst ([CrO3Cl]-) was immobilized on the magnetic support (Fe3O4@SiO2@PPh3). The structural characteristics of the product were determined using elemental analysis, X-ray fluorescence (XRF), X-ray diffraction (XRD), Fourier transform infrared (FT-IR) and solid state UV–Vis. The particle size and morphology were identified by scanning electron microscope (SEM), transmission electron microscopy (TEM) and XRD. A vibrant sample was employed to determine the magnetic properties of the prepared samples.