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Swelling of Ti3C2Tx mxene in water and methanol at extreme pressure conditions
Umeå University, Faculty of Science and Technology, Department of Physics.ORCID iD: 0000-0002-1535-9476
DESY Photon Science, Hamburg, Germany.
Department of Industrial and Materials Science, Chalmers University of Technology, Göteborg, Sweden.
Umeå University, Faculty of Science and Technology, Department of Physics.ORCID iD: 0000-0002-3320-8487
2024 (English)In: Advanced Science, E-ISSN 2198-3844, Vol. 11, no 9, article id 2307067Article in journal (Refereed) Published
Abstract [en]

Pressure-induced swelling has been reported earlier for several hydrophilic layered materials. MXene Ti3C2Tx is also a hydrophilic layered material composed by 2D sheets but so far pressure-induced swelling is reported for this material only under conditions of shear stress at MPa pressures. Here, high-pressure experiments are performed with MXenes prepared by two methods known to provide “clay-like” materials. MXene synthesized by etching MAX phase with HCl+LiF demonstrates the effect of pressure-induced swelling at 0.2 GPa with the insertion of additional water layer. The transition is incomplete with two swollen phases (ambient with d(001) = 16.7Å and pressure-induced with d(001) = 19.2Å at 0.2 GPa) co-existing up to the pressure point of water solidification. Therefore, the swelling transition corresponds to change from two-layer water intercalation (2L-phase) to a never previously observed three-layer water intercalation (3L-phase) of MXene. Experiments with MXene prepared by LiCl+HF etching have not revealed pressure-induced swelling in liquid water. Both MXenes also show no anomalous compressibility in liquid methanol. The presence of pressure-induced swelling only in one of the MXenes indicates that the HCl+LiF synthesis method is likely to result in higher abundance of hydrophilic functional groups terminating 2D titanium carbide.

Place, publisher, year, edition, pages
John Wiley & Sons, 2024. Vol. 11, no 9, article id 2307067
Keywords [en]
2D materials, compressibility, high pressure, MXene, swelling
National Category
Condensed Matter Physics Materials Chemistry
Identifiers
URN: urn:nbn:se:umu:diva-218631DOI: 10.1002/advs.202307067ISI: 001126400200001PubMedID: 38095537Scopus ID: 2-s2.0-85179749248OAI: oai:DiVA.org:umu-218631DiVA, id: diva2:1822687
Funder
Swedish Research Council, 2017-04456Swedish Research Council, 2019-03411Swedish Research Council, 2021-05924Vinnova, 2019-00068Available from: 2023-12-27 Created: 2023-12-27 Last updated: 2024-05-08Bibliographically approved

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Iakunkov, ArtemTalyzin, Aleksandr V.

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