Nanosized Sn-MFI zeolite for selective detection of exhaust gases
Date
2016
Authors
Talapaneni, S.N.
Grand, J.
Thomas, S.
Ahmad, H.A.
Mintova, S.
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Journal article
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Materials & Design, 2016; 99:574-580
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Abstract
The properties of tin containing MFI type zeolite nanocrystals (Sn-MFI) synthesized under hydrothermal conditions from colloidal suspensions, and further application for selective detection of automotive exhaust gases (CO, CO₂, NOx) are reported. The properties of the Sn-MFI nanosized zeolite are compared with the pure silicalite-1 nanocrystals (Si-MFI) synthesized under identical conditions, and used as a reference. Additionally, both samples (Si-MFI and Sn-MFI) with high crystallinity and high porosity were stabilized in coating suspensions and deposited in films by spin-coating approach. The Si-MFI and Sn-MFI samples as self-supported pellets and thin films were exposed to different concentrations of exhaust gases in the presence of 100 ppm of water. The sorption behavior of the Sn-MFI and the Si-MFI towards CO, CO₂, NO and NO₂ gases was followed by in situ IR spectroscopy. The influence of the tin concentration in the zeolite nanocrystals and the type of assembly (self-supported pellets and films) on the gas detection was studied. The fast detection of NO₂ with the Sn-MFI sample in comparison to the other gases implies that the tin containing zeolite could be considered for further use a selective material for detection of low concentrations of NO₂ (0-20 ppm)
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Data source: Supplementary data, http://www.sciencedirect.com/science/article/pii/S0264127516303173#appd001
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Copyright 2016 Elsevier