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Synthesis of (V 2/3 Sc 1/3) 2 AlC i-MAX phase and V 2-x C MXene scrolls

Synthesis of (V 2/3 Sc 1/3) 2 AlC i-MAX phase and V 2-x C MXene scrolls

Jimmy Thörnberg, Joseph Halim, Jun Lu, Rahele Meshkian, Justinas Palisaitis, Lars Hultman, Per O Å Persson, Johanna Rosen

Nanoscale. 2019 Aug 8;11(31):14720-14726.

PMID: 31347630

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.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP1313019656	SC-1		1313019-65-6	Price

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