Sol–gel routes for microporous zirconia and titania membranes
| Autor: | R. Kreiter, Vadim G. Kessler, Mariëlle D. A. Rietkerk, Jaap F. Vente, Henk M. van Veen, Ben C. Bonekamp |
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| Rok vydání: | 2008 |
| Předmět: |
Materials science
Nanoparticle General Chemistry Microporous material Permeation Condensed Matter Physics Electronic Optical and Magnetic Materials Membrane technology Biomaterials Membrane Chemical engineering Materials Chemistry Ceramics and Composites Organic chemistry Cubic zirconia Pervaporation Sol-gel |
| Zdroj: | Journal of Sol-Gel Science and Technology. 48:203-211 |
| ISSN: | 1573-4846 0928-0707 |
| DOI: | 10.1007/s10971-008-1760-x |
| Popis: | 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 γ-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. |
| Databáze: | OpenAIRE |
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