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Journal of Advanced Ceramics 2023, 12(10): 1902-1918 https://doi.org/10.26599/JAC.2023.9220796
Research Article | Open Access | Issue | Published: 25 October 2023

Synthesis of high-entropy MXenes with high-efficiency electromagnetic wave absorption

Show Author's Information Linjing Qiaoa,b,  Jianqiang Bia,b( ),  Guandong Lianga,b,  Yao Yanga,b,  Hongyi Wanga,b,  Shaoyin Wanga,b
Key Laboratory for Liquid–Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, China
School of Materials Science and Engineering, Shandong University, Jinan 250061, China
Keywords:
MAX phase, MXene, electromagnetic wave absorption, high-entropy
Cite this article:
Qiao L, Bi J, Liang G, et al. Synthesis of high-entropy MXenes with high-efficiency electromagnetic wave absorption. Journal of Advanced Ceramics, 2023, 12(10): 1902-1918. https://doi.org/10.26599/JAC.2023.9220796
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Abstract Full text About this article

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 MXenes, (Mo0.25Cr0.25Ti0.25V0.25)3C2Tx and (Mo0.2Cr0.2Nb0.2Ti0.2V0.2)4C3Tx, were synthesized for the first time. During the exfoliation and delamination processes, the structural, morphological, and compositional evolutions were analyzed, verifying the successful formation of single-to-few-layer two-dimensional MXene nanosheets. Investigations indicate that with the filling content of only 35 wt%, MXene powder filled composites exhibit high-efficiency EM wave absorption performances. The f-(Mo0.25Cr0.25Ti0.25V0.25)3C2Tx possesses the minimum reflection loss (RLmin) of −45.0 dB with the matching thickness of 1.52 mm and the maximum effective absorption bandwidth (EAB) of 5.6 GHz at 1.65 mm thickness. Also, f-(Mo0.2Cr0.2Nb0.2Ti0.2V0.2)4C3Tx can attain an RLmin of −52.8 dB with the thickness of 1.58 mm and an optimum EAB value of 3.6 GHz at 1.50 mm. The satisfactory EM wave absorption efficiency and bandwidth, thin matching thickness, and low filling content prove the lightweight advantage and great application potential of high-entropy MXenes in EM wave absorption. In this work, the high-entropy strategy is applied to tune the EM wave absorption performances for MXenes. Furthermore, high-entropy engineering is expected to provide control and tunability of many other properties, such as electrochemical, catalytic, and mechanical behaviors.


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About this article

Synthesis of high-entropy MXenes with high-efficiency electromagnetic wave absorption

Show Author's information Linjing Qiaoa,b, Jianqiang Bia,b( ), Guandong Lianga,b, Yao Yanga,b, Hongyi Wanga,b, Shaoyin Wanga,b
Key Laboratory for Liquid–Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, China
School of Materials Science and Engineering, Shandong University, Jinan 250061, China

Abstract

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 MXenes, (Mo0.25Cr0.25Ti0.25V0.25)3C2Tx and (Mo0.2Cr0.2Nb0.2Ti0.2V0.2)4C3Tx, were synthesized for the first time. During the exfoliation and delamination processes, the structural, morphological, and compositional evolutions were analyzed, verifying the successful formation of single-to-few-layer two-dimensional MXene nanosheets. Investigations indicate that with the filling content of only 35 wt%, MXene powder filled composites exhibit high-efficiency EM wave absorption performances. The f-(Mo0.25Cr0.25Ti0.25V0.25)3C2Tx possesses the minimum reflection loss (RLmin) of −45.0 dB with the matching thickness of 1.52 mm and the maximum effective absorption bandwidth (EAB) of 5.6 GHz at 1.65 mm thickness. Also, f-(Mo0.2Cr0.2Nb0.2Ti0.2V0.2)4C3Tx can attain an RLmin of −52.8 dB with the thickness of 1.58 mm and an optimum EAB value of 3.6 GHz at 1.50 mm. The satisfactory EM wave absorption efficiency and bandwidth, thin matching thickness, and low filling content prove the lightweight advantage and great application potential of high-entropy MXenes in EM wave absorption. In this work, the high-entropy strategy is applied to tune the EM wave absorption performances for MXenes. Furthermore, high-entropy engineering is expected to provide control and tunability of many other properties, such as electrochemical, catalytic, and mechanical behaviors.

Keywords: MAX phase, MXene, electromagnetic wave absorption, high-entropy

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Publication history

Received: 29 May 2023
Revised: 21 July 2023
Accepted: 16 August 2023
Published: 25 October 2023
Issue date: October 2023

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© The Author(s) 2023.

Acknowledgements

This work was supported by Major Basic Research Projects of Shandong Natural Science Foundation (ZR2018ZB0104), Science and Technology Development Project of Shandong Province (2016GGX102003, 2017GGX20105), and Natural Science Foundation of Shandong Province (ZR2017BEM032).

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