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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/21842

Title: Detection of triacetone triperoxide using temperature cycled metal-oxide semiconductor gas sensors
Authors: Warmer, Johannes
Wagner, Patrick
Schoening, Michael J.
Kaul, Peter
Issue Date: 2015
Publisher: WILEY-V C H VERLAG GMBH
Citation: PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE, 212 (6), p. 1289-1298
Abstract: The temperature-dependent sensing properties of metal-oxide semiconductor gas sensors (MOX), based on SnO2 and WO3, to measure triacetone triperoxide (TATP), diacetone diperoxid (DADP), and di-tert-butyl-peroxide (DTBP) and acetone are described. Conductivity measurements in the range from 100 to 400 degrees C operating temperature show two different reaction pathways on the surface for WO3 sensors. At temperatures below 150 degrees C organic peroxides react as an oxidizer which leads to an increase in the sensor resistance. Above 200 degrees C they react as a reducing agent that leads to a decrease of the sensor resistance. This effect is caused by two different, peroxide dependent reaction paths. The unique behavior of WO3-based sensors can be used for selectivity enhancements in temperature cycle operation mode. With this method gas concentrations down to a few ppb are detectable. Scheme of TATP reacting on tungsten oxide semiconductor gas sensor. TATP decomposes and this leads to an increase of the sensor resistance at low temperatures and a decrease of resistance at high temperatures.
Notes: [Warmer, Johannes; Kaul, Peter] Bonn Rhein Sieg Univ Appl Sci, D-53359 Rheinbach, Germany. [Wagner, Patrick] Hasselt Univ, Inst Mat Res, B-3590 Diepenbeek, Belgium. [Schoening, Michael J.] Aachen Univ Appl Sci, Inst Nano & Biotechnol, D-52428 Julich, Germany.
URI: http://hdl.handle.net/1942/21842
DOI: 10.1002/pssa.201431882
ISI #: 000356706500017
ISSN: 1862-6300
Category: A1
Type: Journal Contribution
Validation: ecoom, 2016
Appears in Collections: Research publications

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