Details
| Original language | English |
|---|---|
| Pages (from-to) | 416-419 |
| Number of pages | 4 |
| Journal | LANGMUIR |
| Volume | 27 |
| Issue number | 1 |
| Early online date | 30 Nov 2010 |
| Publication status | Published - 4 Jan 2011 |
Abstract
Pore-space homogeneity of zeolite NaX was probed by pulsed field gradient (PFG) NMR diffusion studies with n-butane as a guest molecule. At a loading of 0.75 molecules per supercage, a wide spectrum of diffusivities was observed. Guest molecules in the (well-shaped) zeolite crystallites were thus found to experience pore spaces of quite different properties. After loading enhancement to 3 molecules per supercage, however, molecular propagation ideally followed the laws of normal diffusion in homogeneous media. At sufficiently high guest concentrations, sample heterogeneity was thus found to be of no perceptible influence on the guest mobilities anymore.
ASJC Scopus subject areas
- Materials Science(all)
- General Materials Science
- Physics and Astronomy(all)
- Condensed Matter Physics
- Physics and Astronomy(all)
- Surfaces and Interfaces
- Chemistry(all)
- Spectroscopy
- Chemistry(all)
- Electrochemistry
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In: LANGMUIR, Vol. 27, No. 1, 04.01.2011, p. 416-419.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Tracing pore-space heterogeneities in X-type zeolites by diffusion studies
AU - Adem, Ziad
AU - Caro, Jürgen
AU - Furtado, Filipe
AU - Galvosas, Petrik
AU - Krause, Cordula B.
AU - Kärger, Jörg
PY - 2011/1/4
Y1 - 2011/1/4
N2 - Pore-space homogeneity of zeolite NaX was probed by pulsed field gradient (PFG) NMR diffusion studies with n-butane as a guest molecule. At a loading of 0.75 molecules per supercage, a wide spectrum of diffusivities was observed. Guest molecules in the (well-shaped) zeolite crystallites were thus found to experience pore spaces of quite different properties. After loading enhancement to 3 molecules per supercage, however, molecular propagation ideally followed the laws of normal diffusion in homogeneous media. At sufficiently high guest concentrations, sample heterogeneity was thus found to be of no perceptible influence on the guest mobilities anymore.
AB - Pore-space homogeneity of zeolite NaX was probed by pulsed field gradient (PFG) NMR diffusion studies with n-butane as a guest molecule. At a loading of 0.75 molecules per supercage, a wide spectrum of diffusivities was observed. Guest molecules in the (well-shaped) zeolite crystallites were thus found to experience pore spaces of quite different properties. After loading enhancement to 3 molecules per supercage, however, molecular propagation ideally followed the laws of normal diffusion in homogeneous media. At sufficiently high guest concentrations, sample heterogeneity was thus found to be of no perceptible influence on the guest mobilities anymore.
UR - http://www.scopus.com/inward/record.url?scp=78650706717&partnerID=8YFLogxK
U2 - 10.1021/la103816r
DO - 10.1021/la103816r
M3 - Article
AN - SCOPUS:78650706717
VL - 27
SP - 416
EP - 419
JO - LANGMUIR
JF - LANGMUIR
SN - 0743-7463
IS - 1
ER -