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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.
Received: 23 February 2012; in revised form: 19 March 2012 / Accepted: 12 April 2012 / Published: 20 April 2012
Abstract: 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.
Keywords: biomedical; combustion; environmental; metal oxides; harsh environment
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Cite This Article
MDPI and ACS Style
Zheng, Y.; Li, X.; Dutta, P.K. Exploitation of Unique Properties of Zeolites in the Development of Gas Sensors. Sensors 2012, 12, 5170-5194.
Zheng Y, Li X, Dutta PK. Exploitation of Unique Properties of Zeolites in the Development of Gas Sensors. Sensors. 2012; 12(4):5170-5194.
Zheng, Yangong; Li, Xiaogan; Dutta, Prabir K. 2012. "Exploitation of Unique Properties of Zeolites in the Development of Gas Sensors." Sensors 12, no. 4: 5170-5194.