Prihod'ko R. Colloid-chemical principles of metal oxide nanocomposites creating

The research is dedicated to the development of scientific approaches aimed at the elaboration of new effective "sol-gel" methods for the preparation and modification of nanoscale materials based on amorphous, layered and frame oxide systems. Methods for control and prediction of physical and chemical properties of nanoscale materials depending on their formation techniques were developed. Mechanism of nanoparticles formation and peculiarities of their behavior in the systems studied were found. Examples of non-hydrothermal sol-gel processes for the obtaining of saponite-like materials containing Mg2+, Ni2+ and Со2+ cations in octahedral layer as well as Аl3+, Cr3+ and Fe3+ cations in tetrahedral layer are provided. The variety of methods for the preparation оf zeolites modified with iron and copper ions were developed. The paper studies the practical aspects of hydrotalcites synthesis. Physical and chemical properties as well as the textural properties of Mg-Al-, Mg-Ga- hydrotalcites depend on their chemical composition. Acid-base properties of mixed oxides strongly depend on the chemical composition and the temperature of furnacing. A case study of applicability of obtained hydrotalcites samples for hydrogen peroxide-assisted catalytic hydrolysis reaction for producing benzamide from benzonitrile is provided. An example of "sol-gel" synthesis method of nanosized titanium dioxide is provided. It was found that nanocrystalline TiO2. Lanthanum and cerium doped TiO2 composite has been synthesized, and also it was modified with metal clusters (Cu, Ag, Au, Pd, Pt).