Characterization and transport properties of surfactant-templated silica layers for membrane applications

Zivkovic, Tijana and Benes, Nieck E. and Blank, Dave H.A. and Bouwmeester, Henny J.M. (2004) Characterization and transport properties of surfactant-templated silica layers for membrane applications. Journal of Sol-Gel Science and Technology, 31 (1). pp. 205-208. ISSN 0928-0707

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Abstract:	An intermediate surfactant-templated silica (STS) layer is applied between the supporting mesoporous gamma-Al2O3 and the amorphous microporous silica overlayer resulting in dual-layered microporous silica membranes for gas separation applications that show improved values for both hydrogen flux and selectivity. Determination of thickness and porosity of as-deposited membrane layers by spectroscopic ellipsometry reveals that the STS layer is present as a distinctive layer of sim20 nm thickness, with penetration up to a depth of sim70 nm into the underlying gamma-Al2O3support layer, whose thickness and porosity are determined to be 1.3 mgrm and 50%, respectively.
Item Type:	Article
Copyright:	© Springer 2004
Faculty:	Science and Technology (TNW)
Research Group:	Inorganic Membranes (IM) Inorganic Materials Science (IMS)
Link to this item:	http://purl.utwente.nl/publications/48599
Official URL:	http://dx.doi.org/10.1023/B:JSST.0000047988.80914.20
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