Синтез та властивості магніточутливих наноструктур із карбонізованою поверхнею

Aim of the research . The paper aims to synthesize magnetically sensitive carbonated magnetite – based composites. Methods . UV-Vis spectroscopy, X-ray powder diffraction (XRD), Infrared spectroscopy with Fourier accumulations, low temperature desorption of nitrogen, adsorption of methylene blue. Results . A technique of carbonization of nanoparticles surface of magnetite and magnetite/SiO 2 nanocomposite is developed. The optimal technological parameters of carbonization and the organic chemical for impregnation (i.e. polygel CS (Carbomer 934) are defined. The processes of Methylene Blue adsorption  on nanostructures surface were investigated, the adsorption capacity dependence on number of carbon in nanocomposites surface is defined. With the use of X-ray powder diffraction analysis it is shown that during the carbonization the phase of magnetite is preserved and the phase of γ-Fe 2 O 3 is partially formed, which does not affect the magnetic properties of the carbonized samples. The processes of Methylene Blue adsorption were investigated, it is shown that nanocomposite adsorption capacity increases with an increase of carbon in the surface and is dependent on the organic chemical used for the composite impregnation. The highest rate of adsorption capacity A = 24.9 mg/g is achieved using Fe 3 O 4 /С nanocomposite for Carbomer 934 impregnation. It is found that under the defined conditions the surface of carbonized nanocomposites Fe 3 O 4 /SiO 2 /С could include carbon and silica «islets». Such kind of structure of surface could be actual from the point of view of hydrophilic and hydrophobic balance and the increase of functional capacities. Coercivity, specific magnetization of saturation, remanent specific magnetization and relative remanent magnetization of synthesized ensembles nanoparticles Fe 3 O 4 and nanocomposites Fe 3 O 4 /С, Fe 3 O 4 /Сole.acid, Fe 3 O 4 /ССS, Fe 3 O 4 /SiO 2 /ССS are experimentally assessed. The research results could be used in creation of new magnetically managed tools for sufficient drug delivery and of different functionality sorption materials.