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

T. Radosevic-Zivkovic, Nieck Edwin Benes, David H.A. Blank, Henricus J.M. Bouwmeester

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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.
Original languageUndefined
Pages (from-to)205-208
Number of pages4
JournalJournal of sol-gel science and technology
Issue number1
Publication statusPublished - 2004


  • METIS-220179
  • IR-48599

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