Synthesis and study of superparamagnetic Fe3O4/C core‐shells nanoparticles for Cd2+ adsorption

In this study, Fe3O4/C core‐shell (Fe3O4/C‐EG) nanocomposite adsorbent was synthesized to treat wastewater contaminated with Cd2+ ions. The structural properties of the material have been determined using X‐ Ray diffraction, fourier transform infrared (FT‐IR). The morphology of the sample was assessed by transmission electron microscopy (TEM) and the images show that Fe3O4/C‐EG nanoparticles with an average particle size of 15‐20 nm are encased by a carbon shell. The specific surface area of Fe3O4/C‐EG measured by the BET method is 64.78 m2/g. The adsorption isotherm and kinetics were investigated, and the equilibrium data were fitted well to the Langmuir model with a maximum adsorption capacity of 35.85 μmol/g. Results also show that the material was a favorable adsorbent for Cd2+ ions.