Synthesis of Mesoporous Fe3O4 and Fe3O4/C Nanocomposite forRemoval of Hazardous Dye from Aqueous Media

The magnetic mesoporous Fe3O4 and Fe3O4/Carbon Nanocomposite (Fe3O4/C) are synthesized by afacile hydrothermal method in one- step and are used for methylene blue dye removal. Nanomaterialsare characterized by field-emission scanning electron microscope (FE-SEM), transition electronmicroscopy (TEM), energy dispersive X-ray spectrometry (EDX), X-ray diffraction (XRD), Fouriertransform infrared spectroscopy (FT-IR) and Vibrating sample magnetometry (VSM). The specificsurface area of the samples and mean pore diameter were measured via Brunauer–Emmett–Teller (BET) surface area measurement technique. To improve the adsorption performance someimportant parameters affecting dye removal are optimized. Maximum capacity for methylene blue(MB) adsorption on to Fe3O4 and Fe3O4/C Nanocomposite is 169.5 and 208.33 mg. g-1, respectively,which compared to some same recent reports, has a better adsorption capacity. Thermodynamicparameters (ΔGο, ΔΗο and ΔSο) were calculated and the result showed a spontaneous, endothermicand increase in randomness for dye adsorption. The obtained data has the best fitting with Langmuirisotherm and the kinetic analysis has the best fit by pseudo-second order model.

Keywords:

Adsorption , Environmental , Fe3O4/C Nanocomposite , Kinetic Study , Methylene Blue