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ArticleName New technologies of materials synthesis on the basis of rare and non-ferrous metals
DOI 10.17580/tsm.2016.11.06
ArticleAuthor Drobot D. V., Smirnova K. A., Kulikova E. S., Musatova V. Yu.

K. A. Bolshakov Chair of Chemistry and Technology of Rare and Scattered Elements, Nanosize and Composite Materials, Moscow Technological University (Institute of Fine Chemical Technologies), Moscow, Russia:

D. V. Drobot, Head of a Chair, e-mail:
K. A. Smirnova, Leading Engineer, Post-Graduate Student
E. S. Kulikova, Head of Laboratory, Post-Graduate Student
V. Yu. Musatova, Post-Graduate Student


Our investigations, carried out in the past decade, show the progress in the synthesis of functional materials (luminophores and magnetic materials). Their results are given in this paper. Oxides L-Та2O5 (lattice parameters: a = 0.619484(18) nm, b = 4.02547(9) nm, с = 0.389060(7) nm) and T-Nb2O5 (lattice parameters: a = 0.62029(9) nm, b = 2.9205(4) nm, c = 0.39235(4) nm) were obtained by Supercritical AntiSolvent (SAS) method. Supercritical СО2 is the ideal solvent: pressure release leads to the gas evaporation without the product contamination. Pressure and temperature of the critical point are 7.38 MPa and 31 °C. Specific surface area of Nb2O5 is 259.5 m2/g, which is much higher than the one of technical product (4.4 m2/g). At the same time, specific surface area of Ta2O5 is 435.9 m2/g, which is by 400 times higher than the one of technical product (1.3 m2/g). To obtain the metallopolymer cobalt (II) and nickel (II) nanocomposites acidic carboxylates of these metals of unsaturated dicarboxylic were synthesized and characterized by thermal analysis and IR spectroccopy. Thermolysis of synthesized carboxylates was carried out, and obtained nanocomposites were investigated by transmission and scanning electron microscopy and X-ray diffraction. The synthesized metallopolymer Co (II) and Ni (II) nanocomposites, obtained as a result of thermal carboxylates decomposition in argon atmosphere, are black powders consisting of two structural elements: nanoparticles Co3O4/CoO or NiO/ß-Ni in polymeric shell are implanted in organic polymeric matrix (in accordance with the X-ray diffraction data).
This scientific work was carried out with the financial support of the Russian Foundation for Basic Research (Projects No. 13-03-00342, 16-03-00148, 15-03-04436).

keywords Supercritical fluid, methylate, niobium, tantalum, nickel, cobalt, non-saturated dicarboxylic acids, carboxylated, magnetic nanocomposites, synthesis, thermolysis

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