Surfactant-assisted hydrothermal crystallization of nanostructured lithium metasilicate (Li sub(2SiO) sub(3)) hollow spheres: II - Textural analysis and CO sub(2-H) sub(2)O sorption evaluation

In a previous work, the synthesis and structural-microstructural characterization of different nanocrystalline lithium metasilicate (Li sub(2SiO) sub(3)) samples were performed. Then, in this work, initially, a textural analysis was performed over the same samples. Li sub(2SiO) sub(3) samples prepar...

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Bibliographic Details
Published in:Journal of solid state chemistry 2011-08, Vol.184 (8), p.2257-2262
Main Authors: Ortiz-Landeros, Jose, Gomez-Yanez, Carlos, Pfeiffer, Heriberto
Format: Article
Language:English
Subjects:
Carbon dioxide
Carrier gases
Crystallization
Lithium
Nanocrystals
Sorption
Triton
Water vapor
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Summary:In a previous work, the synthesis and structural-microstructural characterization of different nanocrystalline lithium metasilicate (Li sub(2SiO) sub(3)) samples were performed. Then, in this work, initially, a textural analysis was performed over the same samples. Li sub(2SiO) sub(3) samples prepared with a non-ionic surfactant (TRITON X-114) presented the best textural properties. Therefore, this sample was selected to evaluate its water vapor (H sub(2O) and carbon dioxide (CO) sub(2)) sorption properties. Sorption experiments were performed at low temperatures (30-80 degree C) in presence of water vapor using N sub(2 or CO) sub(2) as carrier gases. Results clearly evidenced that CO sub(2 sorption on these materials is highly improved by H) sub(2)O vapor, and of course, textural properties enhanced the H sub(2O-CO) sub(2) sorption efficiency, in comparison with the solid-state reference sample.
ISSN:0022-4596
DOI:10.1016/j.jssc.2011.06.027