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

Abstract

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).