Sol–gel routes for microporous zirconia and titania membranes

被引:0
作者
Robert Kreiter
Mariëlle D. A. Rietkerk
Ben C. Bonekamp
Henk M. van Veen
Vadim G. Kessler
Jaap F. Vente
机构
[1] Energy Research Centre of the Netherlands,Department of Chemistry
[2] SLU,undefined
来源
Journal of Sol-Gel Science and Technology | 2008年 / 48卷
关键词
Zirconia; Titania; Membrane; Microporous; Pervaporation; Gas permeation;
D O I
暂无
中图分类号
学科分类号
摘要
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.
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页码:203 / 211
页数:8
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