PB@COF-derived core-shell Fe/Fe3O4/C composites with excellent electromagnetic wave absorption performance for the entire Ku band

被引：1
作者：
Li, Gang [1 ]
Tan, Ruiyang [2 ]
Gao, Bohong [1 ]
Liu, Xinli [1 ]
Zhang, Mingyuan [1 ]
Chen, Ping [2 ]
Wang, Xinyi [1 ]
机构：
[1] Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Sch Chem & Chem Engn, State Key Lab Coordinat Chem, Nanjing 210023, Peoples R China
[2] Nanjing Univ, Sch Elect Sci & Engn, Nanjing 210023, Peoples R China
来源：
CHEMICAL ENGINEERING JOURNAL | 2025年 / 504卷
基金：
中国国家自然科学基金;
关键词：
Core-shell structure; Electromagnetic wave absorption; Dielectric-magnetic synergy; HIGH-EFFICIENCY; LIGHTWEIGHT;
D O I：
10.1016/j.cej.2024.159010
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Developing advanced electromagnetic wave absorption (EMWA) materials is crucial for curbing electromagnetic pollution. This study presents the synthesis of core-shell Fe/Fe3O4/C composites, FFC-700 and FFC-800, derived from Prussian blue@covalent organic framework (PB@COF) via pyrolysis at 700 and 800 degrees C, and the hollow FFC-900 at 900 degrees C. Their chemical compositions, microstructures, and EMWA performances were thoroughly examined. FFC-700 and FFC-800, featuring core-shell structures and abundant interfaces, facilitate electron transfer and enhance polarization effects. Notably, FFC-700 achieved a minimum reflection loss (RLmin) of-75.82 dB at an ultrathin thickness of 1.45 mm, with an effective absorption bandwidth (EAB) of 6.22 GHz at 1.66 mm, spanning the entire Ku-band. FFC-800 also provides substantial EMWA performance, with an RLmin of-30.14 dB at 1.61 mm and an EAB of 6.08 GHz at 1.67 mm, also covering the Ku-band. Radar cross-section (RCS) simulations reveal the absorbers' exceptional radar stealth, with their coatings significantly reducing RCS values. The composites' adjustable structure, balanced composition, and dielectric-magnetic synergy optimize impedance matching for full-Ku-band coverage. This work offers a promising approach to fabricating efficient EMWA materials from PBA@COF and MOF@COF precursors.
引用
收藏
页数：13
相关论文
共 75 条
  • [1] Liu P.B., Zhang G.Z., Xu H.X., Cheng S.C., Huang Y., Ouyang B., Qian Y.T., Zhang R.X., Che R.C., Synergistic dielectric–magnetic enhancement via phase-evolution engineering and dynamic magnetic resonance, Adv. Funct. Mater., 33, (2023)
  • [2] Luo J.H., Dai Z.Y., Feng M.N., Chen X.W., Sun C.H., Xu Y., Hierarchically porous carbon derived from natural Porphyra for excellent electromagnetic wave absorption, J. Mater. Sci. Technol., 129, pp. 206-214, (2022)
  • [3] Shu R.W., Guan Y., Liu B.H., Preparation of nitrogen-doped reduced graphene oxide/zinc ferrite@nitrogen-doped carbon composite for broadband and highly efficient electromagnetic wave absorption, J. Mater. Sci. Technol., 214, pp. 16-26, (2025)
  • [4] Shu R.W., Yang X.H., Zhao Z.W., Fabrication of core-shell structure NiFe<sub>2</sub>O<sub>4</sub>@SiO<sub>2</sub> decorated nitrogen-doped graphene composite aerogels towards excellent electromagnetic absorption in the Ku band, Carbon, 210, (2023)
  • [5] Luo J.H., Yan W.X., Li X.P., Shu P.C., Mei J., Shi Y.F., Carbon nanotubes decorated FeNi/nitrogen-doped carbon composites for lightweight and broadband electromagnetic wave absorption, J. Mater. Sci. Technol., 158, pp. 207-217, (2023)
  • [6] Shu R.W., Zhao Z.W., Yang X.H., Fabrication of nitrogen-doped reduced graphene oxide/porous magnesium ferrite@silica dioxide composite with excellent dual-band electromagnetic absorption performance, Chem. Eng. J., 473, (2023)
  • [7] Miao P., Qu N., Chen W.X., Wang T.Y., Zhao W.F., Kong J., A two-dimensional semiconductive Cu-S metal-organic framework for broadband microwave absorption, Chem. Eng. J., 454, (2023)
  • [8] Hou Y.Z., Li B.C., Chen J.S., Shen X.Y., Wang B., Liu K.R., Wei S.C., He X.C., Li D., Han Q., Electromagnetic wave absorption properties of core double-shell structured α-Fe(Si)@Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub> composites, Appl. Surf. Sci., 615, (2023)
  • [9] Wu Z.C., Cheng H.W., Jin C., Yang B.T., Xu C.Y., Pei K., Zhang H.B., Yang Z.Q., Che R.C., Dimensional design and core-shell engineering of nanomaterials for electromagnetic wave absorption, Adv. Mater., 34, (2022)
  • [10] Wang L., Yu X.F., Li X., Zhang J., Wang M., Che R.C., MOF-derived yolk-shell Ni@C@ZnO Schottky contact structure for enhanced microwave absorption, Chem. Eng. J., 383, (2020)
12345678