Thin film porous membranes based on sol-gel chemistry for catalytic sensors

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Nanoporous sol-gel based films are finding a wide variety of uses including gas separations and supports for heterogeneous catalysts. The films can be formed by spin or dip coating, followed by relatively low temperature annealing. The authors used several types of these films as coatings on the Pd alloy thin film sensors they had previously fabricated and studied. The sol-gel films have little effect on the sensing response to H{sub 2} alone. However, in the presence of other gases, the nanoporous film modifies the sensor behavior in several beneficial ways. (1) They have shown that the sol-gel coated sensors were ... continued below

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5 p.

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Hughes, R.C.; Patel, S.V.; Jenkins, M.W.; Boyle, T.J.; Gardner, T.J. & Brinker, C.J. May 1, 1998.

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This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 14 times . More information about this article can be viewed below.

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Albuquerque, NM (United States)
    Place of Publication: Albuquerque, New Mexico

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Description

Nanoporous sol-gel based films are finding a wide variety of uses including gas separations and supports for heterogeneous catalysts. The films can be formed by spin or dip coating, followed by relatively low temperature annealing. The authors used several types of these films as coatings on the Pd alloy thin film sensors they had previously fabricated and studied. The sol-gel films have little effect on the sensing response to H{sub 2} alone. However, in the presence of other gases, the nanoporous film modifies the sensor behavior in several beneficial ways. (1) They have shown that the sol-gel coated sensors were only slightly poisoned by high concentrations of H{sub 2}S while uncoated sensors showed moderate to severe poisoning effects. (2) For a given partial pressure of H{sub 2}, the signal from the sensor is modified by the presence of O{sub 2} and other oxidizing gases.

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5 p.

Notes

OSTI as DE98005009

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  • 7. international meeting on chemical sensors, Beijing (China), 27-30 Jul 1998

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  • Other: DE98005009
  • Report No.: SAND--97-3124C
  • Report No.: CONF-980727--
  • Grant Number: AC04-94AL85000
  • Office of Scientific & Technical Information Report Number: 658200
  • Archival Resource Key: ark:/67531/metadc706064

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  • May 1, 1998

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  • Sept. 12, 2015, 6:31 a.m.

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  • April 14, 2016, 1:35 p.m.

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Hughes, R.C.; Patel, S.V.; Jenkins, M.W.; Boyle, T.J.; Gardner, T.J. & Brinker, C.J. Thin film porous membranes based on sol-gel chemistry for catalytic sensors, article, May 1, 1998; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc706064/: accessed August 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.