Journal of Physical Studies 24(2), Article 2701 [6 pages] (2020) DOI: https://doi.org/10.30970/jps.24.2701 FOURIER IR SPECTROSCOPY STUDY OF THE RADIATION-THERMAL DECOMPOSITION OF WATER IN THE nano-ZrO2+nano-Al2O3+H2O SYSTEM T. N. Agayev, S. Z. Melikova , N. N. Gadzhieva Institute of Radiation Problems NAS of Azerbaijan, 9, B. Vahabzadeh St., Baku, AZ--1143, Azerbaijan, e-mail: sevincmelikova9513@gmail.com Received 26 August 2019; in final form 27 March 2020; accepted 07 April 2020; published online 18 April 2020

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 $T=373 \div 673$\,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 fixed value of the absorbed dose. $W_{\rm RT}$ (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 ($T=373 \div 673$\,K) has been established.

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