Sol-gel synthesis and characterization of microporous silica membranes. 2: Tailor-making porosity
Journal Article
·
· Journal of Colloid and Interface Science
- Univ. of Twente, Enschede (Netherlands)
Unsupported silica membranes were prepared by acid-catalyzed hydrolysis and condensation of tetraethylorthosilicate. The possibility of tailoring the pore size and porosity of microporous silica membranes was investigated by varying the amounts of reactants. A wide range of porosities of 0 to 30% could be obtained. Of the varied parameters, the acid concentration in the reaction mixture is of most importance for the variation in porosity. The pore size distribution was calculated from nitrogen adsorption isotherms, by using the Horvath-Kawazoe method. This resulted in an average pore diameter of 5 {angstrom} with a broad tail up to 10 {angstrom}.
- OSTI ID:
- 256846
- Journal Information:
- Journal of Colloid and Interface Science, Journal Name: Journal of Colloid and Interface Science Journal Issue: 1 Vol. 180; ISSN 0021-9797; ISSN JCISA5
- Country of Publication:
- United States
- Language:
- English
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