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Issue 31, 2019
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Synthesis of (V2/3Sc1/3)2AlC i-MAX phase and V2−xC MXene scrolls

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Abstract

We report the synthesis and characterization of a new laminated i-MAX phase, (V2/3Sc1/3)2AlC, with in-plane chemical ordering between the M-elements. We also present evidence for the solid solution (V2−xScx)2AlC, where x ≤ 0.05. Chemical etching of the Al and Sc results in a two-dimensional (2D) MXene counterpart: V2−xC from the latter phase. Furthermore, etching with HF yields single-sheet MXene of flat morphology, while LiF + HCl gives MXene scrolls. We also show a 4× reduction in etching time for (V2−xScx)2AlC compared to V2AlC, suggesting that traces of Sc changes the phase stability, and make the material more susceptible to etching. The results show a path for improved control of MXene synthesis and morphology, which may be applicable also for other MAX/MXene systems.

Graphical abstract: Synthesis of (V2/3Sc1/3)2AlC i-MAX phase and V2−xC MXene scrolls

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Publication details

The article was received on 18 Mar 2019, accepted on 22 Jul 2019 and first published on 26 Jul 2019


Article type: Paper
DOI: 10.1039/C9NR02354B
Nanoscale, 2019,11, 14720-14726
  • Open access: Creative Commons BY-NC license
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    Synthesis of (V2/3Sc1/3)2AlC i-MAX phase and V2−xC MXene scrolls

    J. Thörnberg, J. Halim, J. Lu, R. Meshkian, J. Palisaitis, L. Hultman, P. O.Å. Persson and J. Rosen, Nanoscale, 2019, 11, 14720
    DOI: 10.1039/C9NR02354B

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