Encapsulation of magnetic CoFe2O4 in SiO2 nanocomposites using hydroxyapatite as templates: A drug delivery system

► Composite nanomaterials of CoFSi show the core-shell structure. ► An inorganic silica based ordered meso-porous materials was used as a shell. ► The coercivity (Hc) of the uncoated CoF is lower than those of the coated CoFSi. ► Controlled release shown IMC rapidly released in initial following sustained release.