ИСТИНА

The study is devoted to the development of methods for the 2D and 3D oxide nanostructures synthesis and additional methods for their chemical and structural modification with an aim to create new functional nanomaterials. The layered rare-earth hydroxides (LRHs) that have been discovered recently represent a new class of 2D inorganic materials. Due to their anion-exchange and exfoliation ability layered rare-earth hydroxide can be assembled in 3D composite bulk material containing inorganic rare-earth host and organic guest. These materials currently attract an attention due to their unusual properties, combining features of host and guest species. The most promising LRH applications include the design of luminescent materials and biomaterials. Development of the methods for synthesis 3D nanostructures based on alumina oxyhydroxides, as well as the model proposed for quantitative description of the chemical and structural changes upon annealing at 20 - 1700 °C, led to the laboratory technology allowing to obtain monolithic 3D materials having wide properties range: density of 0.03 – 2.5 g/cm3, open porosity 99.3-25% and specific surface from 300 to 1 m2/g. The surface of the porous monolith can have the composition AlOx(OH)y or SiOx, depending on the task for further chemical modification. Using various methods of chemical adsorption and impregnation, new 3D nanomaterials were obtained: porous spinel MgAl2O4 with the grain size ~10 nm, composites consisting of Al2O3 fibrils network and embedded TiO2 particles with the size from 3 to 10 nm, membranes for superprotonics fuel cells, hybrid 3D nanostructures phthalocyanine-oxide with sensing functions etc. Developed functional 3D materials can be applied in nanoelectronic, photonics, optoelectronics and sensor devices as well as in energy, medicine and environmental protection.