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Exploitation of Unique Properties of Zeolites in the Development of Gas Sensors

School of Electronic Science and Technology, Dalian University of Technology, Dalian 116023, China
Department of Chemistry, the Ohio State University, 100 W. 18th Ave., Columbus, OH 43210, USA
Authors to whom correspondence should be addressed.
Sensors 2012, 12(4), 5170-5194;
Received: 23 February 2012 / Revised: 19 March 2012 / Accepted: 12 April 2012 / Published: 20 April 2012
(This article belongs to the Special Issue Sensing at the Nano-Scale: Chemical and Bio-Sensing)
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The unique properties of microporous zeolites, including ion-exchange properties, adsorption, molecular sieving, catalysis, conductivity have been exploited in improving the performance of gas sensors. Zeolites have been employed as physical and chemical filters to improve the sensitivity and selectivity of gas sensors. In addition, direct interaction of gas molecules with the extraframework cations in the nanoconfined space of zeolites has been explored as a basis for developing new impedance-type gas/vapor sensors. In this review, we summarize how these properties of zeolites have been used to develop new sensing paradigms. There is a considerable breadth of transduction processes that have been used for zeolite incorporated sensors, including frequency measurements, optical and the entire gamut of electrochemical measurements. It is clear from the published literature that zeolites provide a route to enhance sensor performance, and it is expected that commercial manifestation of some of the approaches discussed here will take place. The future of zeolite-based sensors will continue to exploit its unique properties and use of other microporous frameworks, including metal organic frameworks. Zeolite composites with electronic materials, including metals will lead to new paradigms in sensing. Use of nano-sized zeolite crystals and zeolite membranes will enhance sensor properties and make possible new routes of miniaturized sensors. View Full-Text
Keywords: biomedical; combustion; environmental; metal oxides; harsh environment biomedical; combustion; environmental; metal oxides; harsh environment
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Zheng, Y.; Li, X.; Dutta, P.K. Exploitation of Unique Properties of Zeolites in the Development of Gas Sensors. Sensors 2012, 12, 5170-5194.

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