mesoporous silica magnetite nanocomposites for dispersive solid phase adsorption of pollutants from environmental samples

From the first discovery of mesoporous silica materials in 1992, they are known as an essential group of nanoporous materials that are synthesized in both basic and acidic environments using supramolecular species as templates and structure directing agent. magnetic mesoporous nanocomposites considering different morphologies, structures, and particle sizes are classified as: monodisperse magnetic nanocrystals encapsulated in mesoporous nanospheres; microspheres encapsulating magnetic cores into aligned mesoporous silica shells; magnetic nanoparticles encapsulated in the pores or cages of mesoporous silica and rattle-type magnetic nanocomposites. in recent years, many studies described the applicability of these magnetic mesoporous silica materials (mcm-n, sba-n, kit-n, fsm-n,…) for the magnetic separation of inorganic and organic analytes/pollutants to extract or preconcentrate them by magnetic dispersive solid phase extraction (for liquid samples) or matrix solid phase dispersion (for powder samples) methods and for magnetically assisted removal of chemicals from polluted samples. the large specific surface areas, high chemical and mechanical stability, tunable pore sizes and volumes, easy separation by applying a magnetic field and fasil functionalization of their surface make them as a good candidate for application as novel adsorbents in the separation or removal of organic and inorganic compounds.