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Synthesis of (V 2/3 Sc 1/3 ) 2 AlC i-MAX phase and V 2-x C MXene scrolls.
- Source :
-
Nanoscale [Nanoscale] 2019 Aug 08; Vol. 11 (31), pp. 14720-14726. - Publication Year :
- 2019
-
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.
Details
- Language :
- English
- ISSN :
- 2040-3372
- Volume :
- 11
- Issue :
- 31
- Database :
- MEDLINE
- Journal :
- Nanoscale
- Publication Type :
- Academic Journal
- Accession number :
- 31347630
- Full Text :
- https://doi.org/10.1039/c9nr02354b