Acta Phys. -Chim. Sin. ›› 2026, Vol. 42 ›› Issue (7): 100275.doi: 10.1016/j.actphy.2026.100275

• ARTICLE • Previous Articles     Next Articles

Interface engineered Mo2C high-performance electromagnetic absorption and thermal insulation

Dongfang Liu1, Di Lan2, Yanze Yin1, Junru Kong1, Yanhong Meng1, Yan Liu1,*(), Yaru Qiu3,*(), Guofei Xia4, Dong Liu1,*()   

  1. 1 School of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo 255049, Shandong Province, China
    2 School of Automotive Materials, Hubei University of Automotive Technology, Shiyan 442002, Hubei Province, China
    3 Department of Pharmacy and Laboratory Medicine, Heze Medical College, Heze 274000, Shandong Province, China
    4 Longt Lighting Group Inc, Yangzhou 225600, Jiangsu Province, China
  • Received:2026-02-05 Revised:2026-02-28 Accepted:2026-03-02 Published:2026-05-22
  • Contact: Email: liuyan@sdut.edu.cn (Yan Liu)qiuyaru1@163.com (Yaru Qiu)liu_dong@sdut.edu.cn (Dong Liu)

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Abstract:

The escalating issue of electromagnetic (EM) pollution necessitates the development of multifunctional materials integrating efficient absorption with thermal management. Herein, we report a dual-functional design based on interface-engineered Mo2C MXenes. Through a molten-salt etching strategy, metal ions (Cu/Fe) were in situ doped into Mo2C, constructing heterostructures that significantly enhance interfacial polarization and defect-induced dipole relaxation. The optimized Mo2C/Fe composite demonstrates exceptional EM absorption performance, achieving the reflection loss of −41.8 dB at 2.0 mm with a broad bandwidth of 5.12 GHz. This enhancement is attributed to the synergistic effect of optimized impedance matching and multi-scale polarization loss mechanisms. Furthermore, the derived Mo2C/Fe aerogel exhibits ultralow density (0.0235 g cm−3) and outstanding thermal insulation (ΔT < 20 ℃ at 80 ℃), exhibiting superior corrosion resistance in neutral environments. This work develops a viable design strategy for advanced MXene-based composites, demonstrating their dual functionality in efficient EM absorption and effective thermal insulation.

Key words: MXene, Molten-salt etching, Interfacial polarization, Electromagnetic absorption