From crystal phase mixture to pure metal-organic frameworks - Tuning pore and structure properties

Przemysław J Jodłowski; Grzegorz Kurowski; Klaudia Dymek; Marcin Oszajca; Witold Piskorz; Kornelia Hyjek; Anna Wach; Anna Pajdak; Michal Mazur; Daniel N Rainer; Dominik Wierzbicki; Piotr Jeleń; Maciej Sitarz

doi:10.1016/j.ultsonch.2023.106377

From crystal phase mixture to pure metal-organic frameworks - Tuning pore and structure properties

Ultrason Sonochem. 2023 May:95:106377. doi: 10.1016/j.ultsonch.2023.106377. Epub 2023 Mar 21.

Authors

Affiliations

¹ Faculty of Chemical Engineering and Technology, Cracow University of Technology, Warszawska 24, 30-155 Kraków, Poland. Electronic address: przemyslaw.jodlowski@pk.edu.pl.
² Faculty of Chemical Engineering and Technology, Cracow University of Technology, Warszawska 24, 30-155 Kraków, Poland.
³ Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland.
⁴ Paul Scherrer Institute, 5232 Villigen, Switzerland.
⁵ Strata Mechanics Research Institute, Polish Academy of Sciences, Reymonta 27, 30-059 Kraków, Poland.
⁶ Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University, Hlavova 8, Prague 128 43, Czech Republic.
⁷ Paul Scherrer Institute, 5232 Villigen, Switzerland; Faculty of Energy and Fuels, AGH University of Science and Technology, Mickiewicza 30, 30-059 Kraków, Poland.
⁸ Faculty of Materials Science and Ceramics, AGH University of Science and Technology, Mickiewicza 30, 30-059 Kraków, Poland.

Abstract

In this study, a sonochemical route for the preparation of a new Hf-MIL-140A metal-organic framework from a mixture of UiO-66/MIL-140A is presented. The sonochemical synthesis route not only allows the phase-pure MIL-140A structure to be obtained but also induces structural defects in the MIL-140A structure. The synergic effect between the sonochemical irradiation and the presence of a highly acidic environment results in the generation of slit-like defects in the crystal structure, which increases specific surface area and pore volume. The BET-specific surface area in the case of sonochemically derived Zr-MIL-140A reaches 653.3 m²/g, which is 1.5 times higher than that obtained during conventional synthesis. The developed Hf-MIL-140A structure is isostructural to Zr-MIL-140A, which was confirmed by synchrotron X-ray powder diffraction (SR-XRD) and by continuous rotation electron diffraction (cRED) analysis. The obtained MOF materials have high thermal and chemical stability, which makes them promising candidates for applications such as gas adsorption, radioactive waste removal, catalysis, and drug delivery.

Keywords: Hf-MIL-140A; Metal–organic frameworks; Sonochemistry; UiO-66.