摘要：Magnetic @c-Fe"2O"3/SiO"2 (M-@cFS) nanocomposite was prepared using @c-Fe"2O"3 as the magnetic carriers. M-@cFS was characterized by transmission electron microscope (TEM), X-ray diffraction (XRD), and Fourier Transform infrared spectroscopy (FTIR). The characterizations of M-@cFS exhibit the irregular core-shell structure, and SiO"2 has been successfully coated on the surface of @c-Fe"2O"3. M-@cFS has much higher adsorption capacity 116.09mg/g calculated by coated SiO"2 on M-@cFS than @c-Fe"2O"3 and SiO"2, and the alkaline conditions are beneficial to the adsorption of MB. Coexisting cations, ionic strength and humic acid can influence the adsorption capacity. Meanwhile, adsorption kinetics data for M-@cFS show good fit to the pseudo-second-order kinetics model, and the Langmuir equation is more appropriate to describe the adsorption behavior of MB on M-@cFS. Moreover, after recycling four times, M-@cFS washed by ethanol can still keep high adsorption capacity for MB adsorption.
