Preparation of functionalized mesoporous La-SBA-15@Fe3O4 shell/core nanocomposite for adsorption of phosphorus

In this study, lanthanum-modified the shell–core magnetic nanocomposites with Fe 3 O 4 core and homogeneous mesoporous silica shell (La-SBA-15@Fe 3 O 4 -x) were prepared. The preparation, morphology, composition and magnetic properties of La-SBA-15@Fe 3 O 4 were investigated by TEM, SEM, XRD, VSM and BET. The results suggested that the SBA-15 have successfully encapsulated Fe 3 O 4 and the magnetic particles were decorated by lanthanum. The adsorption experiments were carried out to explore effect of La-SBA-15@Fe 3 O 4 on removal of phosphorus from aqueous solution. The kinetic study of adsorption process was investigated to describe the relationship between adsorption rate and adsorption equilibrium and the Langmuir and Freundlich isotherm models were employed to illustrate adsorption isotherm.