Optical studies of thin films of cryocondensed mixtures of water with carbon dioxide

Abstract

The reasons for choosing this type of hydrate as an object of research were the actual problems of cleaning the air layer of the planet from carbon. A series of experiments was carried out to record changes in the vibrational spectra in a thin film of a cryocondensed mixture of water and carbon dioxide at various concentrations. The purpose of this study was to determine the presence of carbon dioxide hydrates in conditions of high vacuum and low-temperature condensation from the gas phase. For the frequency range, the interpretation of changes in the vibrational spectra depending on the annealing temperature of the sample and the concentration of carbon dioxide is given 2210-2260, 2270-2290, 2310-2380, 2800-3700, 3590-3610, 3580-3720, 3685-3720 cm^-1. The peaks of adsorption of a 15% carbon dioxide mixture with water at a condensation temperature of 15 K and further annealing of the sample are compared.