Selective sensor utilizing a thin monolayer of b-oriented silicalite-1 crystals-magneto-elastic ribbon assembly.
This report presents the development of new selective gas sensors utilizing a b-oriented silicalite-1 layer-magneto-elastic ribbon assembly. The key principle for the operation of these sensors is monitoring the changes in the resonance frequency of the Metglas strip in relation to the concentration of a component in the gas phase. This technique provides a simple way for monitoring the effects of the amount of adsorbed gases in the silicalite-1 coating. The thickness of the zeolite layer is that of a single crystal. The silicalite-1 crystals are oriented in the b-direction, meaning that the straight channels are perpendicular to the sensor surface, which is confirmed by X-ray diffraction (XRD) analysis. The sensor was able to repeatedly sense carbon dioxide in air and could discriminate between linear and branched hydrocarbons. The sensor was able to detect n-butane, while it did not respond to the presence of iso-butane, indicating sensing selectivity.
Gora
Leszek
L
Catalysis Engineering The Pore, DelftChemTech, Delft University of Technology, Julianalaan 136, 2628BL Delft, The Netherlands. l.gora@submail.nl
Kuhn
Jelan
J
Baimpos
Theodoros
T
Nikolakis
Vladimiros
V
Kapteijn
Freek
F
Serwicka
Ewa M
EM
D002623:Chemistry Techniques, Analytical / Q000295:instrumentation*; D004548:Elasticity; D005609:Free Radicals / Q000737:chemistry; D005740:Gases / Q000032:analysis / Q000737:chemistry; D008280:Magnetics; D008567:Membranes, Artificial; D008855:Microscopy, Electron, Scanning; D016877:Oxidants / Q000737:chemistry; D010100:Oxygen / Q000737:chemistry; D010126:Ozone / Q000737:chemistry; D013696:Temperature; D013818:Thermogravimetry; D014961:X-Ray Diffraction; D017641:Zeolites / Q000737:chemistry*
D005609:Free Radicals; D005740:Gases; D008567:Membranes, Artificial; D016877:Oxidants; D017641:Zeolites; D010126:Ozone; D010100:Oxygen