Investigation of structural and optical properties of zirconia dioxide nanoparticles by radiation and thermal methods

Abstract

The X-ray diffraction (XRD) spectrum of the nano-ZrO2 compound was drawn, the crystal structure was determined at room temperature and under normal conditions. Radiation-thermal decomposition of water on nanosized ZrO2 in the temperature range of [Formula: see text]–673 K has been studied by Fourier transform infrared spectroscopy (FTIR) and Raman spectroscopy. It has been shown that nanosized zirconium dioxide adsorbs water via the molecular and dissociative mechanisms. Intermediate products of the radiation-induced heterogeneous decomposition of water, namely, the molecular oxygen and hydrogen peroxide radical ions, zirconium hydride, and hydroxyl radicals have been detected. A comparative analysis of changes in the absorption bands (ABs) of molecular water and surface hydroxyl groups with temperature has been conducted, and the stimulating role of radiation in the radiation-thermal process of water decomposition has been revealed. With the participation of nano-ZrO2 during the radiation-heterogeneous decomposition of water to reveal the role of unbalanced cargo carriers that play the role of energy carriers under the influence of gamma-quantities in nano-ZrO2 and nano-[Formula: see text] systems paramagnetic centers, their origin and acquisition kinetics learned by the EPR method.

Investigation on Process of the Water Radiolysis in the Nano Si+H2O System Under the Influence of Gamma – Quanta

“…Originally silicon has been processed at T=473K, T=72 hours in the air environment, and after determination of the necessary weight is purified in special conditions and added to the ampoule (V=19 ml) which is thermally processed (T=773K). After heat treatment (T=673K) of silicon in an ampoule in vacuum conditions (P=10 -3 mm Hg) within 4 hours, it has been cooled, and the necessary amount of the double distilled water purified from air in special conditions [9] has been adsorbed on his surface. Then ampoules have been soldered and irradiated in special conditions (by continuous hashing of system by the vibrator with the purpose to achieve suspension of silicon particles in water) on a source 60 Co at the power of dose P=22 Rad/s.…”

Hydrogen Generation During Thermal Processes of Water Decomposition on the Surface of Nano-ZrO2+3mol.%Y2O3

“…Therefore, these materials are widely used in all fields of science and technology. One of these applications is the method of obtaining molecular hydrogen from the conversion of water used for the transition from nuclear energy to hydrogen energy with the help of nanoscale catalysts [2][3][4][5][6][7].…”

Molecular hydrogen production by radiolysis of water on the surface of nano-ZrO2 under the influence of gamma rays

“…Nano-ZrO2 has good thermal insulation and dielectric properties over a wide temperature range, which allows it to be considered as a promising material in the field of microelectronics and the use of construction materials [9][10][11][12][13][14]. Nanostructure materials possess developed surfaces and increased defects on the boundary of particles, which are of remarkable significance in radiation-heterogeneous processes with their participation, and during the progression of highly sensitive detectors of ionizing radiation [15][16][17][18]. Heating devices operate at fairly high temperatures, using nanoparticle ZrO2 to ensure their high quality.…”