Romanova I. Physico-chemical basics for obtaining functional oxide materials by citric method.

The work is devoted to the creation of the physicо-chemical basics for obtain-ing functional oxide materials by a citric method. The properties of compounds formed on each stage of citric method have been investigated, including the reac-tion between a metal salt and the citric acid in solution, the formation of polymer-ic matrix during the process of the partial elimination of a solvent, the thermal decomposition of citric precursors and the crystalization of single and mixed ox-ides of Zn, Cu, Ni, Co, Mn, Fe, Ti, Ce. The composition and structure of com-pounds is found to depend on the mole ratio of reagents, the temperature of thermal treatment and the nature of metals. Regularities in the process of for-mation and growth of crystallites during the thermal decomposition of citrate precursors and crystallization of oxides are investigated. Relations between the composition, structure and dispersity of intermediate and final compounds and the functional properties of materials as the catalysts for the oxidation of CO and volatile organic compounds, the electrode materials for lithium-ion batteries and the sorbents for removing phosphate-ions from water solution are established.