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Characterization and Transport Properties of Surfactant-Templated Silica Layers for Membrane Applications

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Abstract

An intermediate surfactant-templated silica (STS) layer is applied between the supporting mesoporous γ-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 ∼20 nm thickness, with penetration up to a depth of ∼70 nm into the underlying γ-Al2O3support layer, whose thickness and porosity are determined to be 1.3 μm and 50%, respectively.

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Authors and Affiliations

  1. Laboratory for Inorganic Materials Science, Faculty of Chemical Technology & MESA+ Research Institute for Nanotechnology, University of Twente, PO Box 217, 7500, AE Enschede, The Netherlands

    Tijana Zivkovic, Nieck E. Benes, Dave H.A. Blank & Henny J.M. Bouwmeester

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  1. Tijana Zivkovic
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  2. Nieck E. Benes
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  3. Dave H.A. Blank
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  4. Henny J.M. Bouwmeester
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Zivkovic, T., Benes, N.E., Blank, D.H. et al. Characterization and Transport Properties of Surfactant-Templated Silica Layers for Membrane Applications. Journal of Sol-Gel Science and Technology 31, 205–208 (2004). https://doi.org/10.1023/B:JSST.0000047988.80914.20

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  • DOI: https://doi.org/10.1023/B:JSST.0000047988.80914.20

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