Sorption of water molecules by silicon (SiO2) airgel nanopores
A.A. Lugovskoi, K.Yu. Osipov, B.A. Tikhomirov
V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, 1, Academician Zuev square, Tomsk, 634021, Russia
Keywords: кремниевый аэрогель, водяной пар, адсорбция, десорбция, буферная камера, галогенная лампа, silica airgel, water vapor, adsorption, desorption, buffer chamber, halogen lamp
Abstract
We suggest a technique for preparing nanoporous samples with adsorbed gas for the spectrometric experiments, which allows one to determine the concentration of the absorbed sample gas molecules using a buffer chamber of a large volume in the vacuum system. We also suggest a method which allows a decrease in the sample cleaning time from the absorbed molecules by about an order of magnitude comparing with the sample cleaning time at a room temperature using simultaneous pumping and contactless gas sample heating by radiation of a halogen lamp. The technique and the method tested in simple laboratory experiments of water vapor sorption by silicon (SiO2) airgel.
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