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DRIFT spectra of xerogels synthesized by co-condensation of tetraethoxysilane (or 1,2-bis(triethoxysilyl)ethane) and 3-aminopropyltriethoxysilane have been measured using termoevacuation in the temperature range 50–350°C. The disappearance of bands related to the vibrations of water molecule with temperature growth and shifts of absorption band related to the deformation vibrations of amino groups...
Oxygen-selective adsorbents were prepared by two different methods, hydrothermal and sol–gel methods. The adsorption and desorption characteristics of these adsorbents were compared in terms of stability and sorption capacity. The sorbents prepared by the sol–gel method showed better cyclic stability and higher adsorption capacity than that prepared by the hydrothermal method because the sol–gel method...
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