Rapid and scalable combustion synthesis of (Mo2/3Y1/3)2AlC i-MAX as the precursor for vacancy-ordered MXene
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| Názov: | Rapid and scalable combustion synthesis of (Mo2/3Y1/3)2AlC i-MAX as the precursor for vacancy-ordered MXene |
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| Autori: | Saffar Shamshirgar, Ali, Ivanov, Roman, Aydinyan, Sofiya, Ghosh, Sohan, Chabanais, Florian, Ronchi, Rodrigo, Halim, Joseph, Elsukova, Anna, Qin, Leiqiang, Nazaretyan, Khachik, Zakaryan, Marieta, Kharatyan, Suren, Persson, Per O A, Hussainova, Irina, Rosén, Johanna |
| Zdroj: | Journal of Materials Science & Technology. 255:157-169 |
| Predmety: | MXene, Chemical ordering, SHS, Combustion synthesis |
| Popis: | For MXenes to be viable in commercial and industrial applications, their production must rely on processes that are energy-efficient, environmentally sustainable, and scalable. A critical factor influencing this viability is the synthesis route of the parent MAX phase. In this study, we report a novel and rapid approach for synthesizing a chemically ordered MAX phase (i-MAX), specifically the in-plane ordered (Mo2/3Y1/3)2AlC, using self-propagating high-temperature synthesis (SHS) completed in one minute. The target MAX phase yield was estimated using Rietveld refinement to be 73.6% with the main impurity phases identified as Mo3Al2C and YF3. Thermodynamic calculations combined with experimental characterizations indicate that the use of an aluminum-yttrium master alloy played a pivotal role in achieving high synthesis yield by facilitating a sequence of intermediate phase transformations that enhance reaction kinetics and i-MAX formation. This method involves the utilization of Poly(tetrafluoroethylene)- (C2F4)nas a promoter, which enables the formation of volatile fluorides and fluorine-containing intermediates, making the reaction self-sustaining. Etching and delamination of the SHS-produced i-MAX phase, resulted in a vacancy-ordered MXene with the formula Mo4/3CTx, with a yield value twice that obtained using the conventional MAX-phase parent material preparation route. This work demonstrates the method's effectiveness in achieving rapid, straightforward, and energy-efficient synthesis of a diverse range of MAX and i-MAX phases, thereby paving the way for scalable and efficient MXene production. (c) 2025 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/) |
| Popis súboru: | |
| Prístupová URL adresa: | https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-219231 https://doi.org/10.1016/j.jmst.2025.09.014 |
| Databáza: | SwePub |
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Nájsť tento článok vo Web of Science | Abstrakt: | For MXenes to be viable in commercial and industrial applications, their production must rely on processes that are energy-efficient, environmentally sustainable, and scalable. A critical factor influencing this viability is the synthesis route of the parent MAX phase. In this study, we report a novel and rapid approach for synthesizing a chemically ordered MAX phase (i-MAX), specifically the in-plane ordered (Mo2/3Y1/3)2AlC, using self-propagating high-temperature synthesis (SHS) completed in one minute. The target MAX phase yield was estimated using Rietveld refinement to be 73.6% with the main impurity phases identified as Mo3Al2C and YF3. Thermodynamic calculations combined with experimental characterizations indicate that the use of an aluminum-yttrium master alloy played a pivotal role in achieving high synthesis yield by facilitating a sequence of intermediate phase transformations that enhance reaction kinetics and i-MAX formation. This method involves the utilization of Poly(tetrafluoroethylene)- (C2F4)nas a promoter, which enables the formation of volatile fluorides and fluorine-containing intermediates, making the reaction self-sustaining. Etching and delamination of the SHS-produced i-MAX phase, resulted in a vacancy-ordered MXene with the formula Mo4/3CTx, with a yield value twice that obtained using the conventional MAX-phase parent material preparation route. This work demonstrates the method's effectiveness in achieving rapid, straightforward, and energy-efficient synthesis of a diverse range of MAX and i-MAX phases, thereby paving the way for scalable and efficient MXene production. (c) 2025 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/) |
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| ISSN: | 10050302 |
| DOI: | 10.1016/j.jmst.2025.09.014 |