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One-pot sol-gel synthesis of amine hybrid titania/silsesquioxane composite aerogel for CO capture.
- Source :
- Journal of Sol-Gel Science & Technology; Dec2017, Vol. 84 Issue 3, p422-431, 10p
- Publication Year :
- 2017
-
Abstract
- Amine hybrid titania/silsesquioxane composite aerogel (AHTSA) was prepared by an one-pot sol-gel process without any catalyst. The sol-gel reaction mechanism of AHTSA was proposed. The use of 3-aminopropyltriethoxysilane (APTES) plays as an 'internal catalyst' and promotes the formation of gel during sol-gel process. The morphology, microstructure, pore structure and CO capture performances of AHTSA were investigated. AHTSA exhibits microstructure of the typical silica aerogels with colloidal structure. Moreover, AHTSA has a large number of macropores which favor the CO adsorption. Thermogravimetric analysis reveals that AHTSA has a high CO/N selectivity in CO/N mixture gas. CO adsorption capacity with dry and humid 1 vol% CO is as high as 4.19 and 5.04 mmol/g, respectively. Correspondingly, amine efficiency under dry and humid conditions is 0.37 and 0.44, respectively. AHTSA has very short adsorption halftime below 4 min, and its CO adsorption capacity do not show obvious attenuation after 30 adsorption-regeneration cycles, indicating AHTSA is a dynamic and regenerable sorbent. Graphical abstract: [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09280707
- Volume :
- 84
- Issue :
- 3
- Database :
- Complementary Index
- Journal :
- Journal of Sol-Gel Science & Technology
- Publication Type :
- Academic Journal
- Accession number :
- 126317725
- Full Text :
- https://doi.org/10.1007/s10971-017-4516-7