Magnetic properties and microstructures of iron oxide@ mesoporous silica core-shell composite for applications in magnetic dye separation

摘要

In this report, hollow mesoporous silica (HMS) and iron oxide-hollow mesoporous silica (Fe_xO_y@HMS) core-shell composite were prepared by a one-step facile fabrication method. Transmission electron microscopy, X-ray diffraction, N_2 adsorption-desorption isotherms, and vibrating sample magnetometer were used to characterize the morphology, microstructure, and magnetic properties of the HMS and core-shell composite. The magnetic separability of Fe_xO_y@HMS core-shell composite was tested in Rhodamine B (Rh.B) dye solution. The results indicate that the core-shell composite can absorb Rh.B dyes molecules effectively up to 90.1%.