Vapor-assisted crystallization of in situ glycine-modified UiO-66 with enhanced CO2 adsorption

UiO-66, composed of a Zr6O4(OH)4 cluster and 1,4-benzene dicarboxylate, is a promising material for practical chemical processes because it is known as one of the most thermally and chemically stable Metal Organic Frameworks (MOFs). Recently, the structure and composition of UiO-66 have been modifie...

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Bibliographic Details
Published in:New journal of chemistry 2022-01, Vol.46 (4), p.1779-1784
Main Authors: Fujimoto, Yugo, Shu, Yasuhiro, Taniguchi, Yurika, Miyake, Koji, Uchida, Yoshiaki, Tanaka, Shunsuke, Nishiyama, Norikazu
Format: Article
Language:English
Subjects:
Adsorption
Benzene
Carbon dioxide
Carboxylates
Chemical reactions
Crystal defects
Crystallization
Glycine
Metal-organic frameworks
Zirconium
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Summary:UiO-66, composed of a Zr6O4(OH)4 cluster and 1,4-benzene dicarboxylate, is a promising material for practical chemical processes because it is known as one of the most thermally and chemically stable Metal Organic Frameworks (MOFs). Recently, the structure and composition of UiO-66 have been modified in various ways to improve its functionality and expand its utilization. Herein, we report the synthesis of in situ glycine-modified UiO-66 using a vapor-assisted crystallization (VAC) method. The VAC method using HCl turned out to be the most suitable for synthesizing of glycine-modified UiO-66 with high crystallinity and porosity. Modifying glycine enhanced the CO2 adsorption capacity. In XPS measurement on Zr 3d, the peak shift to higher binding energy was observed by modifying glycine. This result implys that carboxylates derived from glycine chemically interacted with defects of Zr clusters. This work provides a new direction to modify UiO-66.
ISSN:1144-0546
1369-9261
DOI:10.1039/d1nj05284e