Kessler, Vadim
- Department of Molecular Sciences, Swedish University of Agricultural Sciences
Abstract
Zirconia and titania nanoparticle sols were prepared, using either ligand-based precursor stabilization or acid stabilization routes. These sols were used to prepare microporous coatings on gamma-alumina substrates. The acetylacetonate-based particles have very small hydrodynamic diameters (1-2 nm), which lead to sol intrusion into the supports. As a result no appropriate membrane layer was formed. A microemulsion-based zirconia sol leads to a membrane that was selective in pervaporation dehydration of a water/n-butanol mixture. An optimized membrane showed stable separation performance for 120 days with a high selectivity toward water. Permporometry and gas permeation results on a titania membrane based on an acid-stabilized sol not only show microporosity, but also a significant contribution from defect flow.
Keywords
zirconia; titania; membrane; microporous; pervaporation; gas permeation
Published in
Journal of Sol-Gel Science and Technology
2008, volume: 48, number: 1-2, pages: 203-211
Publisher: SPRINGER
SLU Authors
UKÄ Subject classification
Inorganic Chemistry
Materials Chemistry
Publication identifier
- DOI: https://doi.org/10.1007/s10971-008-1760-x
Permanent link to this page (URI)
https://res.slu.se/id/publ/18810