Determination of silica material pore sizes from IR spectra of adsorbed water
L.N. Sinitsa1, N.M. Emel’yanov1, A.A. Lugovskoi1, A.P. Shcherbakov1, V.V. Annenkov2
1V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science Tomsk, Russia
2Limnological Institute of the Siberian Branch of the RAS Irkutsk, Russia
Keywords: nanopores, water vapor, absorption spectrum, regression analysis
Abstract
A technique for determining the diameter of nanosized pores has been developed. It consists in filling a substance with liquid water, recording the absorption spectra of the substance with water, compiling a database of spectroscopic data characterizing the substance with different pore sizes, and retriving the pore diameter of an arbitrary substance using an algorithm based on the regression analysis. The technique has been tested on silica samples of different porosity.
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