Selective impedance based gas sensors for hydrocarbons using ZSM-5 zeolite films with chromium(III)oxide interface

Hagen, Gunter; Dubbe, Andreas; Rettig, Frank; Jerger, Alexander; Birkhofer, Thomas; Müller, Ralf; Plog, Carsten; Moos, Ralf

doi:10.1016/j.snb.2005.12.052

Cited by 61 publications

(53 citation statements)

References 20 publications

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“…In the ideal case, this catalytic reaction will be specific to a particular analyte and lead to the production of multiple species that the sensor element is more sensitive too, leading to a large enhancement in response signal for a given analyte with no chance of cross sensitivity. Limited amounts of work have been conducted on the use of zeolites in this fashion [79][80][81][82] indicating a differential response as a result of zeolite layer incorporation.…”

Section: Zeolite Modified Sensorsmentioning

confidence: 99%

Metal oxide semiconductor gas sensors in environmental monitoring

Binions¹,

Naik²

2013

Semiconductor Gas Sensors

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Metal oxide semiconductor gas sensors are utilised in a variety of different roles and industries. They are relatively inexpensive compared to other sensing technologies, robust, lightweight, long lasting and benefit from high material sensitivity and quick response times. They have been used extensively to measure and monitor trace amounts of environmentally important gases such as carbon monoxide and nitrogen dioxide. In this review the nature of the gas response and how it is fundamentally linked to surface structure is explored. Synthetic routes to metal oxide semiconductor gas sensors are also discussed and related to their affect on surface structure. An overview of important contributions and recent advances are discussed for the use of metal oxide semiconductor sensors for the detection of a variety of gases-CO, NO x , NH 3 and the particularly challenging case of CO 2 . Finally a description of recent advances in work completed at University College London is presented including the use of selective zeolites layers, new perovskite type materials and an innovative chemical vapour deposition approach to film deposition.

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Section: Zeolite Modified Sensorsmentioning

confidence: 99%

Metal oxide semiconductor gas sensors in environmental monitoring

Binions¹,

Naik²

2013

Semiconductor Gas Sensors

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“…The maximum PSF 19% is observed at 398K temperature (Table2). The sensitivity observed may be due to chemical reaction occurring between Ag-CO 2 [24] and thereby an acceptance or release of an electron is possible to produce a change in the conductivity of the zeolite. The variation of PSF as a function of operating temperature study reveals that Ag-Beta zeolite is found to be more sensitive for LPG gas compare to CO 2 gas.…”

Section: Resultsmentioning

confidence: 99%

Comparative Study of Conductivity based Silver Modified ZSM5 & Beta Zeolites as a LPG and CO2 Gas Sensor

2016

IJSR

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Zeolites are the gas sensing materials. The microspores of H-Zeolite Socony Mobil-Five (H-ZSM5) and H-Beta zeolites are modified with metal Silver Nitrate (AgNO 3 ) by ion exchange method. The modified Silver-ZSM5 (Ag-ZSM5) and Silver-Beta (Ag-Beta) are characterized by X-Ray Diffraction (XRD), Infrared (IR) Spectroscopy, Thermo Gravimetric Analysis (TGA), Differential Thermal Analysis(DTA), Scanning Electron Microscopy (SEM), Energy Dispersive Analysis of X-Ray (EDAX) techniques. Gas sensing characteristics of Ag-ZSM5 and Ag-Beta zeolite have been studied for Liquified Petroleum Gas (LPG) gas and Carbon dioxide (CO 2 ) gas. The gas sensing properties of Ag-ZSM5 and Ag-Beta zeolite are studied in a static gas characterization system. Adsorption of gas molecules in zeolite changes the ionic activity, which interns changes conductivity. The maximum Percent Sensitivity Factor (PSF) is measured as a function of operating temperature and as a function of gas concentration for LPG and CO 2 gas.

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“…das Auftreten von Grenzflächeneffekten. So wirken ZSM-5-Filme, die in einfacher Dickschichttechnik und mit Galvanikprozessen mit einer Chromoxid-Grenzfläche kombiniert werden, als hoch selektive Kohlenwasserstoffsensoren [66]. Ein deutlicher Anstieg der Impedanz bei niedrigen Frequenzen tritt nur auf, wenn zwischen dem Zeolithen und dem p-leitenden Cr 2 O 3 ein deutlicher Grenzflächenkon-takt vorliegt und die unterschiedlichen Leitfä-higkeiten für Sauerstoffionen in den beiden Materialien zum Tragen kommen [67].…”

Section: In Nanoporen Stabilisierte Farbstoffeunclassified

Kompostite auf Basis von Zeolithen oder geordnet mesoporösen Oxiden für Anwendungen in der Photonik und Sensorik

Wark

2010

Chemie Ingenieur Technik

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Selective impedance based gas sensors for hydrocarbons using ZSM-5 zeolite films with chromium(III)oxide interface

Cited by 61 publications

References 20 publications

Metal oxide semiconductor gas sensors in environmental monitoring

Metal oxide semiconductor gas sensors in environmental monitoring

Comparative Study of Conductivity based Silver Modified ZSM5 & Beta Zeolites as a LPG and CO2 Gas Sensor

Kompostite auf Basis von Zeolithen oder geordnet mesoporösen Oxiden für Anwendungen in der Photonik und Sensorik

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