Synthesis of high-entropy MXenes with high-efficiency electromagnetic wave absorption
نویسندگان
چکیده
High-entropy MXenes, as a new emerging class of materials, possess diverse compositions, unexpected physicochemical characteristics and great potentials for electromagnetic (EM) wave absorption. Herein, two single-to-few-layer high-entropy (Mo0.25Cr0.25Ti0.25V0.25)3C2Tx (Mo0.2Cr0.2Nb0.2Ti0.2V0.2)4C3Tx, were synthesized the first time. During exfoliation delamination processes, structural, morphological compositional evolutions analyzed, verifying successful formation two-dimensional MXene nanosheets. Investigations indicate that with filling content only 35 wt%, powders filled composites exhibit high-efficiency EM absorption performances. The f-(Mo0.25Cr0.25Ti0.25V0.25)3C2Tx possesses minimum reflection loss (RLmin) -45.0 dB matching thickness 1.52 mm maximum effective bandwidth (EAB) 5.6 GHz at 1.65 thickness. Also, f-(Mo0.2Cr0.2Nb0.2Ti0.2V0.2)4C3Tx can attain RLmin -52.8 1.58 an optimum EAB value 3.6 1.50 mm. satisfactory efficiency bandwidth, thin low prove lightweight advantage application potential MXenes in In this work, strategy is applied to tune performances MXenes. Furthermore, engineering expected provide control tunability many other properties, such electrochemical, catalytic, mechanical behaviors.
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ژورنال
عنوان ژورنال: Journal of Advanced Ceramics
سال: 2023
ISSN: ['2227-8508', '2226-4108']
DOI: https://doi.org/10.26599/jac.2023.9220796