Foamed Glassy Phosphate Materials for Biosorbents

The paper considers the applications of foamed glassy phosphate materials as carriers of biologically active substances. One of the advantages of phosphate materials is their ability to effectively support the life of microorganisms. This feature of phosphate glassy materials opens up the prospects for the application of microorganism strains - destructors of oil products to their foamed samples, that is, the creation of biosorbents for purification of water and soil from hydrocarbon contamination. The advantages of a biosorbent are explained by the high biological activity of microorganisms on the surface of foamed glassy phosphates and the possibility of active development of microorganisms with the simultaneous destruction of petrochemical contaminants. The use of biosorbent eliminates the problem of its utilization and regeneration, thus it is suitable for repeated use. The formation of porous glassy phosphate materials on the surface by the method of molecular layering of monolayer coatings allows obtaining chemically modified composite materials, which improves their performance characteristics such as strengthening the material structure with a simultaneous increase in the catalytic activity of biochemical processes.

INFLUENCE OF VANADIUM OXIDE ADDITIVE ON THERMAL TRANSFORMATIONS OF CERAMIC MASS

A comparative study of thermal transformations of ceramic mass (CM) based on α-Al2O3 modified with vanadium oxide additives introduced into CM by wet mixing and by deposition on the surface of the CM particles using molecular layering nanotechnology was carried out. The structural and chemical transformations of the obtained compositions were characterized by differential thermal analysis under linear heating conditions at a rate of 10°С/min, in the temperature range from room temperature to 1000°C. Changes in the phase composition, specific surface area of the compositions, and the state of the modifying additive before and after heating were studied using x-ray diffraction, low-temperature nitrogen adsorption, and ultraviolet–visible diffuse reflectance spectroscopy

Электролюминесценция слоев Ta-=SUB=-2-=/SUB=-O-=SUB=-5-=/SUB=-, полученных методом молекулярного наслаивания

The work shows the possibility of using electroluminescence to study the structures of Si-Ta2O5 and Si-SiO2-Ta2O5 and to obtain the information about the electronic structure of the Ta2O5 layer and the properties of the SiO2-Ta2O5 boundary. A model of the electronic structure of the Ta2O5 layer obtained by molecular layering (atomic layer deposition) is proposed to explain the type of spectral distribution of luminescence regardless of the method of its excitation. It is shown that the formation of a Ta2O5 layer on the surface of thermally oxidized silicon is accompanied by transformation of the near-surface region of SiO2 and quenching of the luminescence band in the spectral region of 650 nm.

Особенности слоев SiO-=SUB=-2-=/SUB=-, синтезированных на кремнии методом молекулярного наслаивания

The paper compares the characteristics of silicon oxide layers obtained by various technological methods. It is shown that the catalytic method of obtaining silicon oxide layers by molecular layering has a number of advantages. The main ones are low growth temperature, high-quality interface with silicon substrate and high growth rate of films. Studies by cathodoluminescence allowed to evaluate the structural quality of silicon oxide layers obtained by molecular layering, and confirmed the idea of its possibilities for obtaining high-quality films of silicon oxide for wide practical application. Физика