Swelling of Ti3C2Tx mxene in water and methanol at extreme pressure conditions

Iakunkov, Artem (författare): Umeå universitet,Institutionen för fysik,Umeå University

Lienert, Ulrich (författare): DESY Photon Science, Hamburg, Germany,Deutsches Elektronen-Synchrotron (DESY)

Sun, Jinhua, 1987 (författare): Department of Industrial and Materials Science, Chalmers University of Technology, Göteborg, Sweden,Chalmers tekniska högskola,Chalmers University of Technology

Talyzin, Aleksandr V., 1969- (författare): Umeå universitet,Institutionen för fysik,Umeå University

(creator_code:org_t)

Relaterad länk:: https://doi.org/10.1...; visa fler...; https://umu.diva-por... (primary) (Raw object); https://research.cha... (primary) (free); https://urn.kb.se/re...; https://doi.org/10.1...; https://research.cha...; visa färre...

Abstract Ämnesord

Stäng

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.

Av författaren/redakt...: Iakunkov, Artem; Lienert, Ulrich; Sun, Jinhua, 198 ...; Talyzin, Aleksan ...

Om ämnet

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.