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

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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
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Science and Technology (TNW)
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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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Metis ID: 220179