Analysis of NMR Adsorption Isotherms of Zeolite ZSM-5: Adsorption Profiles Derived from the Pressure and Temperature Dependences of 129Xe NMR Chemical Shift and Signal Intensity

Fujiwara, Hideaki; Imai, Hirohiko; Adachi, Yuko et al.

Analytical Sciences, 2021, 37(12), 1803-1810

Number of Access:398（2025-09-04 12:44 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/88638

Link to primary information 

File Format Terms of use Size Views Date.Available Description information
AnalSci_37_12_1803 pdf None 817 KB 92 2022.08.10  

Item Information

Output File Export EndNote Basic Export Mendeley

Title
Analysis of NMR Adsorption Isotherms of Zeolite ZSM-5: Adsorption Profiles Derived from the Pressure and Temperature Dependences of 129Xe NMR Chemical Shift and Signal Intensity
Creator
NRID
1000090107102 1000090107102
CreatorName
Fujiwara, Hideaki
NRID
1000040506466 1000040506466
CreatorName
Imai, Hirohiko
CreatorName
Adachi, Yuko
NRID
1000070303972 1000070303972
researchmap permalink
osaka_kimura osaka_kimura
Scopus Author ID
7402712083 7402712083
ORCID
0000-0001-5702-276X 0000-0001-5702-276X
CreatorName
Kimura, Atsuomi
Subject
129xe nmr isotherm
Coverage
Nanospace analysis
Temperature dependence
Zsm-5
Abstract
129Xe NMR spectroscopy of nanomaterials, such as zeolites, can provide valuable information on the nanostructure and physicochemical properties of adsorption. In the present study the pressure and temperature dependences of the 129Xe NMR chemical shift and the signal intensity were investigated in detail with a zeolite ZSM-5. The pressure dependence of the signal intensity at constant temperature was analyzed based on the Langmuir and Dubinin–Radushkevich (D-R) models, from which the thermodynamic parameters and energetic profiles of adsorption were obtained together with information concerning the nanospace size. From this isotherm analysis the coverage, θ, was calculated and used for isotherm analysis of the chemical shift. The θ dependence of the chemical shift was successfully fitted by an exponential function, and the results were discussed in relation to the chemical shift at zero coverage, that at full coverage and the curvature of the exponential function. The chemical shift data reported with the zeolites NaA and KA, where separated signals were observed for the different number of encapsulated Xe atoms in the α cage, were analyzed and discussed collectively
Publisher
Japan Society for Analytical Chemistry
日本分析化学会
Source Title
Analytical Sciences
Volume (Issue)
37(12)
Page
1803-1810
Date of Issued
2021-12-10
Language
English
Handle URL
https://hdl.handle.net/11094/88638
PISSN
09106340
eISSN
13482246
NCID
AA12022210
AA10500785
Relation.isIdenticalTo
DOI (Publisher Version)
https://doi.org/10.2116/analsci.21P202
PMID
34897179
Access Rights
open access
oaire:version
Version of Record
Category
学術雑誌論文 Journal Article