The Impact of Synthesis Method on the Properties and CO2 Sorption Capacity of UiO-66(Ce)

A series of cerium-based UiO-66 was obtained via hydrothermal and sonochemical methods, using the same quantities of reagents (cerium ammonium nitrate (CAN), terephthalic acid (H2BDC)) and solvents) in each synthesis. The impact of synthesis method and metal to linker ratio on the structural and tex...

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Bibliographic Details
Published in:Catalysts 2019-04, Vol.9 (4), p.309
Main Authors: Stawowy, Michalina, Róziewicz, Maciej, Szczepańska, Ewa, Silvestre-Albero, Joaquin, Zawadzki, Mirosław, Musioł, Marta, Łuzny, Rafał, Kaczmarczyk, Jan, Trawczyński, Janusz, Łamacz, Agata
Format: Article
Language:English
Subjects:
Adsorption
Ammonium nitrate
Carbon dioxide
Catalysts
Cerium ammonium nitrate
Chemical reactions
Crystallization
Defects
Oxidation
Reagents
Sorption
Surface chemistry
Synthesis
Terephthalic acid
Ultrasonic imaging
X ray photoelectron spectroscopy
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Summary:A series of cerium-based UiO-66 was obtained via hydrothermal and sonochemical methods, using the same quantities of reagents (cerium ammonium nitrate (CAN), terephthalic acid (H2BDC)) and solvents) in each synthesis. The impact of synthesis method and metal to linker ratio on the structural and textural properties of obtained UiO-66(Ce), as well as their composition in terms of Ce4+/Ce3+ ratio, structure defects resulting from missing linker, and CO2 adsorption capacity was discussed. By using typical characterization techniques and methods, such as XRD, N2 and CO2 sorption, TGA, XPS, and SEM, it was shown that the agitation of reacting mixture during synthesis (caused by stirring or ultrasounds) allows to obtain structures that have more developed surfaces and fewer linker defects than when MOF was obtained in static conditions. The specific surface area was found to be of minor importance in the context of CO2 adsorption than the contribution of Ce3+ ions that were associated with the concentration of linker defects.
ISSN:2073-4344
2073-4344
DOI:10.3390/catal9040309