物理化学学报

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(Ta2/3Ti1/3)2CTx MXene/硫化物异质结构中的多尺度介电损耗工程及其电磁波衰减性能

张世杰1, 王汭祺1, 王顺1, 田利1, 王盼盼1, 梁笑微1, 王爱荣2, 石宇鹏1, 赵志伟1   

  1. 1 河南工业大学材料科学与工程学院, 河南 郑州 450001;
    2 中原工学院机电工程学院, 河南 许昌 461000
  • 收稿日期:2026-06-08 修回日期:2026-07-24 录用日期:2026-07-25
  • 通讯作者: 张世杰, 王顺, 梁笑微 E-mail:zsj562389@sina.com;shun_wang@haut.edu.cn;liangxw@haut.edu.cn
  • 基金资助:
    本研究得到了国家自然科学基金(52302362,12504006)、河南工业大学青年骨干教师培养计划(21421297)、河南工业大学大学生创新创业训练计划(202610463040)、河南工业大学创新人才培养计划顶尖人才培育项目(21421318)、河南省教育厅科学技术研究项目(24A140010)以及河南省自然科学基金(252300420891)的资助。

Multi-scale dielectric loss engineering in (Ta2/3Ti1/3)2CTx MXene/sulfide heterostructures for electromagnetic wave attenuation

Shijie Zhang1, Ruiqi Wang1, Shun Wang1, Li Tian1, Panpan Wang1, Xiaowei Liang1, Airong Wang2, Yupeng Shi1, Zhiwei Zhao1   

  1. 1 School of Material Science and Engineering, Henan University of Technology, Zhengzhou 450001, Henan Province, China;
    2 School of Electro-Mechanical Engineering, Zhongyuan Institute of Science and Technology, Xuchang 461000, Henan Province, China
  • Received:2026-06-08 Revised:2026-07-24 Accepted:2026-07-25
  • Contact: Shijie Zhang, Shun Wang, Xiaowei Liang E-mail:zsj562389@sina.com;shun_wang@haut.edu.cn;liangxw@haut.edu.cn

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摘要： 合理调控介电损耗行为与阻抗匹配仍是开发高性能电磁波吸收材料所面临的关键挑战。在此，本文通过微波辅助溶剂热策略成功构建了一种新型固溶体(Ta2/3Ti1/3)2CTx MXene/CuInS2 (TTC/CS)异质结构。得益于导电MXene纳米片与半导体CuInS2之间的紧密耦合，研究构建了一个多尺度介电损耗工程平台，从而同时优化了电磁衰减能力和阻抗匹配特性。结构分析表明，材料中成功形成了丰富的TTC/CS异质界面，并伴随着显著的界面电荷重新分布。源于固有空位、表面官能团、多阳离子构型以及异质结界面的协同效应，产生了丰富的极化中心和多重介电弛豫过程。同时，互联的层状架构促进了电荷传输、电导损耗以及入射电磁波的多重反射与散射。结果表明，优化后的TTC/CS-3复合材料表现出优异的电磁波吸收性能，在仅1.9 mm的厚度下即可实现4.56 GHz的宽有效吸收带宽(EAB)。电磁参数分析表明，其优异的性能源自衰减能力与阻抗匹配的协同优化。此外，雷达散射截面(RCS)模拟表明，该优化复合材料的电磁散射行为受到了显著抑制。本工作为通过多尺度介电构型构建MXene基异质结构提供了一种有效策略，并为设计轻质、宽带和高效的电磁防护材料提供了新思路。

关键词: (Ta2/3Ti1/3)2CTx, 异质结, 介电弛豫, 平衡阻抗匹配, 电磁防护

Abstract: The rational regulation of dielectric loss behavior and impedance matching remains a critical challenge for developing high-performance electromagnetic wave absorbers. Herein, a novel solid-solution (Ta2/3Ti1/3)2CTx MXene/CuInS2 (TTC/CS) heterostructure was successfully fabricated through a microwaveassisted solvothermal strategy. Benefiting from the intimate coupling nanosheets and semiconductive CuInS2, a multi-scale dielectric loss engineering platform was established to simultaneously optimize electromagnetic attenuation capability and impedance matching characteristics. Structural analyses demonstrate the successful formation of abundant TTC/CS heterointerfaces accompanied by significant interfacial charge redistribution. The synergistic effects originating from intrinsic vacancies, surface functional groups, multi-cation configurations, and heterojunction interfaces generate abundant polarization centers and multiple dielectric relaxation processes. Meanwhile, the interconnected layered architecture promotes charge transport, conduction loss, and multiple reflections/scattering of incident electromagnetic waves. As a result, the optimized TTC/CS-3 composite exhibits superior electromagnetic wave absorption performance, delivering a broad effective absorption bandwidth (EAB) of 4.56 GHz at a thickness of only 1.9 mm. Electromagnetic parameter analysis reveals that the outstanding performance originates from the cooperative optimization of attenuation capability and impedance matching. Furthermore, radar cross-section simulations demonstrate significantly suppressed electromagnetic scattering behavior for the optimized composite. This work provides an effective strategy for constructing MXene-based heterostructures through multi-scale dielectric configuration and offers new insights into the design of lightweight, broadband, and highly efficient electromagnetic protection materials.

Key words: (Ta2/3Ti1/3)2CTx, Heterojunctions, Dielectric relaxation, Balanced impedance matching, Electromagnetic protection