Nanocomposites and nanomaterials

The peculiarities of synthesis and of adsorptive characteristics 
of composites Fe3O4/Al2O3/С
Opanashchuk N.М.1, Kusyak N.V.2, Kusyak A.P.2, Petranovska А.L.1, Gorbyk P.P.1
1 Chuiko Institute of Surface Chemistry of the NAS of Ukraine.
 17 General Naumov Str., Kyiv - 03164, Ukraine.
E-mail: opanaschuknatalya@gmail.com
2 Ivan Franko Zhytomyr State University.
40 V.Berdychevska Str., Zhytomyr-10008, Ukraine.

One of the advanced directions of using nano-composites on the basis of magnetite is the creation of magnet-driven immunosorbents and medicines carriers, in particular containing carbon, since hydrophilic - hydrophobic balance of the surface of the latter ones promotes the extending of their sorptive capabilities [1]. 
As a result of the research, new carbon-containing magneto-sensitive nano-structures on the basis of single-domain magnetite Fe3O4/Al2O3/С have been received and their sorptive characteristcs have been studied. The introduction of Al2O3 was caused by the stabilization of the chemical composition of a template, since the introduction of carbon on the surface of a magnetite takes place under high temperature which causes the phase changes of a magnetite. The results of X-ray diffraction analysis testify to the optimality of a shell, containing two layers of A12O3. The modification of magnetite by aluminium isopropylate was conducted twice. Sacharose was chosen as a carbonific agent. The received nanocomposite was impregnated into sacharose solution in a range of 0,15, 0,3, 0,45 g per 1 g Fe3O4/Al2O3, after that it was fired under the temperature of 500оС in argon stream during an hour. The adsorption analysis of methylene blue (MB) on the surface of carbonized composites Fe3O4/Al2O3/С was conducted in the concentration range of С0 = 0,03 – 0,15 mg/ml (g = 0,03 g, V = 5ml) under static conditions.
The kinetic study of MB sorbtion on the composites surface showed  that the adsorptive enrichment of the surface occurs within 0.5-1 hour.
The received results lay the groundwork for further nanocomposites analysis and its possible use.
1.	А.L. Petranovska, М.V. Abramov, N.М. Opanashchuk, S.P. Turanska, N.V. Kusyak, P.P. Gorbyk Synthesis and properties of magnetically sensitive nanocomposites based on magnetite and gemcitabine // Chemistry, Physics and Technology of Surface.- 2018.- 9, №4. - P. 353-361.