A. V. Topchiev Institute of Petrochemical Synthesis, RAS

D. G. Muratov, L. V. Kozhitov

University of Science and Technology MISiS

E. V. Yakushko, A. V. Popkova, M. A. Pushkarev

The work is dedicated to obtaining nickel metal−carbon nanocomposites, based on IR−pyrolyzed polyacrylonitrile and nickel chloride hexahydrate, and the study of the structural characteristics of the synthesized material. Nanocomposites prepared under IR−based precursor pyrolysis of polyacrylonitrile (PAN) and nickel chloride hexahydrate (NiCl₂ · 6H₂O). Pyrolysis was carried out in the temperature range 150—700 °C. The grown nanocomposites are two−phase system of the carbon matrix formed during carbonization of PAN, and distributed in the nanoparticles of nickel (nickel oxide). The average size of the nanoparticles in the nanocomposite was 15—25 nm. The effect of temperature pyrolysis process IR precursor in the size of nickel nanoparticles obtained. It was determined that the distribution of nickel nanoparticles in size is defined by the temperature of the synthesis of the nanocomposite. So while the temperature increases prevailing average particle size of the metal increases and the distribution is blured and shifts toward larger sizes. By a calculation of the total Gibbs energy of possible reduction reactions of nickel chloride and oxide pyrolysis products PAN the possibility of formation of nanocomposites comprising nickel oxide nanoparticles, which are at a higher temperature infrared heating (more than 5000 °C) can be reducted up to zero−valent state at more higher temperature IR heatig.

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