Kessler, Vadim
- Institutionen för molekylära vetenskaper, Sveriges lantbruksuniversitet
Sammanfattning
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.
Nyckelord
zirconia; titania; membrane; microporous; pervaporation; gas permeation
Publicerad i
Journal of Sol-Gel Science and Technology
2008, volym: 48, nummer: 1-2, sidor: 203-211
Utgivare: SPRINGER
SLU författare
UKÄ forskningsämne
Oorganisk kemi
Materialkemi
Publikationens identifierare
- DOI: https://doi.org/10.1007/s10971-008-1760-x
Permanent länk till denna sida (URI)
https://res.slu.se/id/publ/18810