La2O3改性Ti3C2Tx MXene：温度调控与频率选择表面协同增强X波段微波吸收性能

引用本文: 王强, 杨季凡, 苏晓磊, 刘毅. La₂O₃改性Ti₃C₂T_x MXene：温度调控与频率选择表面协同增强X波段微波吸收性能[J]. 物理化学学报, 2026, 42(8): 100308. doi: 10.1016/j.actphy.2026.100308 shu

Citation: Qiang Wang, Jifan Yang, Xiaolei Su, Yi Liu. La₂O₃ decorated Ti₃C₂T_x MXene: temperature regulation and frequency selective surface synergy for enhanced X-Band microwave absorption[J]. Acta Physico-Chimica Sinica, 2026, 42(8): 100308. doi: 10.1016/j.actphy.2026.100308 shu

La₂O₃改性Ti₃C₂T_x MXene：温度调控与频率选择表面协同增强X波段微波吸收性能

王强 ^1, ,
杨季凡 ^2, ,
苏晓磊 ^{2,
,} ,
刘毅 ^{2,
,}

1.
西安工程大学纺织科学与工程学院, 陕西西安 710048
2.
西安工程大学材料科学与工程学院, 陕西西安 710048

通讯作者: Email: suxiaolei@xpu.edu.cn (苏晓磊); yiliu1021@xpu.edu.cn (刘毅)

摘要: MXene具有较高的介电损耗和独特的层状结构，但其单一组分特性导致强烈的电磁波反射，严重制约了其微波吸收效能。本研究通过氨基键合将La₂O₃纳米颗粒锚定在剥离的Ti₃C₂T_x纳米片上构建La₂O₃@Ti₃C₂T_x纳米复合材料，并以温度为关键参数调控吸收性能。Ti₃C₂T_x由Ti₃AlC₂前驱体经LiF辅助湿法刻蚀、超声剥离及离心获得，通过XRD、SEM和TEM表征了复合材料的物相组成与微观形貌，采用矢量网络分析仪测试了其在X波段的电磁参数。当温度为60 ℃时获得最佳吸收性能，在3.8 mm厚度下最小反射损耗达−50.5 dB (9.2 GHz)，有效吸收带宽完全覆盖X波段(8.2–12.4 GHz)。进一步通过加载频率选择表面的模拟优化，在3.2 mm厚度下X波段反射损耗均低于−10 dB。基于电磁场模拟的机理分析证实，该优异吸收行为源于LC谐振。这项工作为设计和制备高性能Ti₃C₂T_x基微波吸收材料提供了新颖可行的策略，在电磁防护领域展现出良好的应用前景。

关键词:

English

La₂O₃ decorated Ti₃C₂T_x MXene: temperature regulation and frequency selective surface synergy for enhanced X-Band microwave absorption

Qiang Wang ^1, ,
Jifan Yang ^2, ,
Xiaolei Su ^{2,
,} ,
Yi Liu ^{2,
,}

1.
School of Textile Science and Engineering, Xi'an Polytechnic University, Xi'an 710048, Shaanxi Province, China
2.
School of Materials Science & Engineering, Xi'an Polytechnic University, Xi'an 710048, Shaanxi Province, China

Corresponding author: Email: suxiaolei@xpu.edu.cn (Xiaolei Su); yiliu1021@xpu.edu.cn (Yi Liu)

Received Date: 22 February 2026
Accepted Date: 21 April 2026
Revised Date: 20 April 2026
Available Online: 15 August 2026

Abstract: MXene possesses high dielectric loss and a distinctive layered structure, yet its single-component characteristic gives rise to intense electromagnetic wave reflection, which severely restricts its microwave absorption efficiency. In this study, La₂O₃@Ti₃C₂T_x nanocomposites were fabricated by immobilizing La₂O₃ nanoparticles onto exfoliated Ti₃C₂T_x nanosheets via amino-bond linkage, with temperature adopted as a pivotal parameter to modulate the absorption performance. Ti₃C₂T_x was derived from the Ti₃AlC₂ precursor through LiF-assisted wet etching, ultrasonication and centrifugation. The phase composition and microstructure of the composites were characterized by XRD, SEM and TEM, while their electromagnetic parameters in the X-band were measured using a vector network analyzer. The optimal absorption performance was attained at a temperature of 60 ℃. At a thickness of 3.8 mm, the minimum reflection loss reaches −50.5 dB at 9.2 GHz, and the effective absorption bandwidth fully covers the X-band (8.2–12.4 GHz). Furthermore, the microwave absorption performance is further optimized by simulating the loaded frequency selective surface, with the reflection loss in the X-band all below −10 dB at a thickness of 3.2 mm. Mechanistic analysis based on electromagnetic field simulation confirms that the exceptional absorption behavior originates from LC resonance. This work provides a novel and feasible strategy for designing and fabricating high-performance Ti₃C₂T_x-based microwave absorbing materials, which shows promising application prospects in the field of electromagnetic protection.

Key words:

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

La₂O₃改性Ti₃C₂T_x MXene：温度调控与频率选择表面协同增强X波段微波吸收性能

通讯作者: Email: suxiaolei@xpu.edu.cn (苏晓磊); yiliu1021@xpu.edu.cn (刘毅)

English

La₂O₃ decorated Ti₃C₂T_x MXene: temperature regulation and frequency selective surface synergy for enhanced X-Band microwave absorption

Corresponding author: Email: suxiaolei@xpu.edu.cn (Xiaolei Su); yiliu1021@xpu.edu.cn (Yi Liu)

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