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Preparation of a Supported Si3N4 Membrane for Gas Filters

Published online by Cambridge University Press:  15 February 2011

Fei Cheng ,
Stephen M. Kelly ,
Stephen Clark  and
John S. Bradley
Fei Cheng
Affiliation:
Department of Chemistry, University of Hull, Cottingham Road, Hull, HU6 7RX, UK Marc Baumbach and Andreas Schütze Saarland University, Lab for Measurement Technology, Saarbrücken, Germany
Stephen M. Kelly
Affiliation:
Department of Chemistry, University of Hull, Cottingham Road, Hull, HU6 7RX, UK Marc Baumbach and Andreas Schütze Saarland University, Lab for Measurement Technology, Saarbrücken, Germany
Stephen Clark
Affiliation:
Department of Chemistry, University of Hull, Cottingham Road, Hull, HU6 7RX, UK Marc Baumbach and Andreas Schütze Saarland University, Lab for Measurement Technology, Saarbrücken, Germany
John S. Bradley
Affiliation:
Department of Chemistry, University of Hull, Cottingham Road, Hull, HU6 7RX, UK Marc Baumbach and Andreas Schütze Saarland University, Lab for Measurement Technology, Saarbrücken, Germany
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Abstract

A supported Si3N4 membrane was prepared via a non-aqueous sol-gel process using tris(dimethylamino)silylamine, H2NSi(NMe2)3, as a starting material. The SEM image indicated the formation of the Si3N4 membrane with thickness about 2.3 μ m on the surface of the α-Al2O3 support. Nitrogen adsorption analysis indicated that, although most of the pores were similar to those of the α-Al2O3 disk, a new pore size distribution of 20–50 Å for the Si3N4 membrane was observed. The new membrane demonstrates high selective absorption of NO2, suggesting a potential application as a selective filter for gas sensors.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 876: Symposium A – Nanoporous and Nanostructured Materials for Catalysis, Sensor and Gas Separation Applications , 2005 , R8.24
Copyright
Copyright © Materials Research Society 2005

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