Metal-Organic Frameworks for Sensing Applications in the Gas Phase

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Achmann, Sabine ; Hagen, Gunter ; Moos, Ralf ; Malkowsky, Itamar Michael ; Kiener, Christoph:
Metal-Organic Frameworks for Sensing Applications in the Gas Phase.
In: Proceedings SENSOR 2009. - Wunstorf : AMA Verband für Sensorik und Messtechnik e.V. , 2009 . - S. 417-420
ISBN 978-3-9810993-5-5
DOI: https://doi.org/10.5162/sensor09/v2/p5.8

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Abstract

Several materials of the class of metal-organic frameworks (MOF) were tested for their applicability in the field of gas sensors. In particular, impedimetric gas sensor devices were studied. Various sensor configurations were investigated in a frequency range of 1 Hz -10 MHz, and additional time-continuous measurements at 1 Hz were performed. In the temperature range from 120 °C to 240 °C, the sensors were exposed to O2, CO2, C3H8, NO, H2, ethanol and methanol concentrations and tested under various humidity conditions of the carrier gas N2. The materials did not show any signal to O2, CO2, C3H8, NO, and H2. However, promising pronounced and reversible responses in the electric properties to changes in humidity were obtained for some selected MOF materials. Of particular interest is the linear response curve observed at 120 °C.