Fabrication of GO/Fe3O4/SDS magnetic nanocomposites as adsorbents to remove malachite green from water

This work presents the synthesis of magnetic Graphene oxide adsorbents, GO/Fe3O4/SDS nanocomposites, in which Graphene oxide were grafted to magnetic Fe3O4 particles by a facile hydrothermal method. The morphology, chemical structure and magnetic property of the nanocomposite were characterized by Fourier transform infrared spectrometer (FT-IR), X-ray diffraction (XRD) and Scanning electronic microscope (SEM), respectively. Adsorption of methyl green (MG) onto GO/Fe3O4/SDS was investigated with respect to pH, adsorption time, initial MG concentration and temperature. kinetics data and adsorption isotherm, obtained at the optimum pH 6.3, were better fitted by pseudo-second-order kinetic model and by Langmuir isotherm, respectively. Moreover, the GO/Fe3O4/SDS was stable and easily recovered, the adsorption capacity was about 80% of the initial saturation adsorption capacity after being used four times[1-2].