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Jodłowski, Przemysław J.; Kurowski, Grzegorz; Dymek, Klaudia; Oszajca, Marcin; Piskorz, Witold; Hyjek, Kornelia; Wach, Anna; Pajdak, Anna; Mazur, Michal; Rainer, Daniel N.; Wierzbicki, Dominik; Jeleń, Piotr; Sitarz, Maciej
Ultrasonics sonochemistry, 05/2023, Letnik: 95Journal Article
Display omitted •Novel Hf-MIL-140A metal–organic framework structure is synthesized via ultrasound irradiation.•Ultrasound irradiation allows to obtain phase-pure MIL-140A from mixture of UiO-66/MIL-140A.•Sonochemical synthesis route induces structural slit-like defects in the MIL-140A structure.•Sonochemical synthesis route increases BET-specific surface area in MIL-140A structure. 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.
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