Fourier IR spectroscopy study of the radiation-thermal decomposition of water in the nano-ZrO2+nano-Al2O3+H2O system

Abstract

This paper presents the results of Fourier transform infrared spectroscopic studies of the radiation-thermal decomposition of water in the heterogeneous system nano-ZrO 2 +nano-Al 2 O 3 +H 2 O at various weight ratios of nano-oxides in the temperature range T = 373 ÷ 673 K and during radiation exposure. It has been established that the main intermediate products of radiation-heterogeneous decomposition of water are molecular oxygen and other oxygen-containing radical ion groups generated by gamma irradiation, as well as surface hydrides of zirconium and aluminum. Based on a comparative analysis of changes in the intensity of the absorption bands of molecular water and surface hydroxyl groups characterizing nano-ZrO 2 and nano-Al 2 O 3 as a function of temperature, the radiation-catalytic activity of nano-ZrO 2 was detected at a (cid:28)xed value of the absorbed dose. W RT (H 2 ) and its radiation-chemical yields G (H 2 ) were determined. A stimulating role in the radiation-thermal decomposition of H 2 O in a heterogeneous nano-ZrO 2 +nano-Al 2 O 3 system ( T = 373 ÷ 673 K) has been established. Fourier IR spectroscopy, nano-zirconium oxide, nano-aluminum oxide, γ -irradiation, radiation-thermal decomposition.