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; Kimura, Atsuomi

doi:https://doi.org/10.2116/analsci.21P202

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

アクセス数:330件（2025-07-03 17:55 集計）

固定URL: https://hdl.handle.net/11094/88638

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タイトル	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
著者	NRID 1000090107102 1000090107102 著者名 Fujiwara, Hideaki
	NRID 1000040506466 1000040506466 著者名 Imai, Hirohiko
	著者名 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 著者名 Kimura, Atsuomi
キーワード等	129xe nmr isotherm
	Coverage
	Nanospace analysis
	Temperature dependence
	Zsm-5
抄録	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
出版者	Japan Society for Analytical Chemistry
出版者	日本分析化学会
収録物名	Analytical Sciences
巻(号)	37(12)
ページ	1803-1810
刊行年月	2021-12-10
言語	英語
ハンドルURL	https://hdl.handle.net/11094/88638
PISSN	09106340
eISSN	13482246
NCID	AA12022210
NCID	AA10500785
関連情報 (isIdenticalTo)	DOI (出版社版) https://doi.org/10.2116/analsci.21P202
関連情報 (isIdenticalTo)	PMID 34897179
アクセス権	open access
出版タイプ	Version of Record
カテゴリ	学術雑誌論文 Journal Article

資源タイプ	学術雑誌論文
ローカル資源タイプ	学術雑誌論文
DCMI資源タイプ	text
DCTERMS.bibliographicCitation	Analytical Sciences. 2021, 37(12), p. 1803-1810
DC.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
DC.creator	Fujiwara, Hideaki
	Imai, Hirohiko
	Adachi, Yuko
	Kimura, Atsuomi
DC.publisher	Japan Society for Analytical Chemistry
DC.publisher	日本分析化学会
DC.language' scheme='DCTERMS.RFC1766	英語
DC.type' scheme='DCTERMS.DCMIType	text
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2021-12-10
DC.identifier	https://doi.org/10.2116/analsci.21P202
DC.subject	129xe nmr isotherm
	Coverage
	Nanospace analysis
	Temperature dependence
	Zsm-5
DCTERMS.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
DC.format	88638
citation_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
citation_author	Fujiwara, Hideaki
	Imai, Hirohiko
	Adachi, Yuko
	Kimura, Atsuomi
citation_publisher	Japan Society for Analytical Chemistry
citation_language	英語
citation_date	2021-12-10
citation_journal_title	Analytical Sciences
citation_volume	37
citation_issue	12
citation_firstpage	1803
citation_lastpage	1810
citation_doi	https://doi.org/10.2116/analsci.21P202
citation_pmid	34897179
citation_public_url	https://hdl.handle.net/11094/88638

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

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