Fundamental principles of the new creation methods for the synthesis of nanocomposites and nanostructured materials with specified functional properties (Comprehensive Project)
A new fundamental scientific concept of purposeful synthesis of metal oxides and nanocomposites «metal oxide/multiwalled carbon nanotubes» structure with controlled and predetermined properties, which may be used as photocatalysts and electrocatalysts, energy conversion devices is created. Conceptual bases of alternative methods (high-temperature electrochemical synthesis and recovery metallothermal) direct synthesis of nanostructured silicides metals VI-B group are proposed.
The methods of nanocomposites synthesis, the mechanisms of interaction of metal oxides (Ti, Zr, Sn) with multi-walled carbon nanotubes are determined, their structure and structural parameters are established in depending on the conditions of synthesis. Determination of catalytic and electrochemical properties of synthesized nanocomposites allowed to establish regularities of the processes involved and the relationship between structure, properties and conditions of metal oxides and nanocomposites «metal oxide/multi-walled carbon nanotubes».
Mechanisms metallothermic reduction, formation and discharge of electrochemically active particles are determined. Combinations of electroreduction partial processes of metal and non-metallic components of the synthesis of silicides Cr, Mo, W are substantiated. The results obtained allowed to select the optimal composition of electrolytes and electrolysis conditions. The composition (different stoichiometry) of synthesized silicides of chromium, molybdenum and tungsten, and found that depending on the metallothermic reduction may be prepared nanopowders, nanorods and nanostructured coatings of different dispersion, morphology, structure, and hardness.
New knowledge for the creation of new methods for the synthesis of nanocomposite and nanostructured materials with desired functional properties is obtained. Fundamental laws directed synthesis nanooxides metal nanocomposites «metal oxide/multiwalled carbon nanotubes» and nanostructured silicides metals VI-B group with a given structure, catalytic, electrochemical, semiconductor, corrosion and other valuable functional properties are proposed.