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Synthesis of Three Isoelemental MXenes and Their Structure-Property Relationships
Marley Downes1, Christopher E Shuck1,2, Ruocun John Wang1
1A. J. Drexel Nanomaterials Institute, and Department of Materials Science and Engineering, Drexel University, Philadelphia, Pennsylvania 19104, United States.
Journal of the American Chemical Society
|October 31, 2024
Summary
This study investigates how the number of layers (n) in (Mo2/3V1/3)2CTx MXenes impacts their properties. Results show gradual changes in stability and significant electronic/electrochemical property shifts between n=1 and n=2.
Area of Science:
- Materials Science
- Nanotechnology
- Chemistry
Background:
- MXenes are a rapidly growing class of 2D materials with diverse applications.
- Understanding the impact of layer number (n) on MXene properties is crucial for material design.
- Previous studies lacked isoelemental MXene compositions with multiple n values.
Purpose of the Study:
- To investigate the effect of layer number (n) on the structure-property relationships of MXenes.
- To synthesize and characterize isoelemental (Mo2/3V1/3)2CTx MXenes with n = 1, 2, and 3.
- To provide the first direct study on the impact of n on MXene properties.
Main Methods:
- Synthesis of (Mo2/3V1/3)2CTx MXenes for n = 1, 2, and 3.
- Chemical analysis to determine M-element ordering.
- Characterization of sample stability, electronic, and electrochemical properties.
Main Results:
- Isoelemental (Mo2/3V1/3)2CTx MXenes with n = 1, 2, and 3 were successfully synthesized.
- Complete and partial ordering of M-elements observed in n=2 and n=3 samples, respectively.
- Sample stability increased gradually with n, while electronic and electrochemical properties showed significant changes from n=1 to n=2.
Conclusions:
- The layer number (n) significantly influences MXene properties.
- The study establishes a foundation for understanding MXene structure-property relationships based on n.
- These findings are critical for tailoring MXene materials for specific applications.
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