材料科学
纳米复合材料
反射损耗
多孔性
芯(光纤)
吸收(声学)
复合材料
热解
兴奋剂
复合数
多孔介质
聚合
壳体(结构)
光电子学
化学工程
聚合物
工程类
作者
Chao Ma,Yicheng Wang,Chenghao Zhang,Yufei Huang,Xiuqin Zhang,Jing Peng,Chaochao Chai,Mengfei Yuan,Hongchao Ma,Maolin Zhai
标识
DOI:10.1016/j.apsusc.2023.157913
摘要
N-doped porous core-shell nanocomposite is considered to be a competent candidate for the absorbing of electromagnetic wave (EMW). In this work, polydopamine (PDA) wrapped ZIF-67 (Z@P) precursors with the core-shell structure were obtained through ZIF-67 triggered dopamine self-polymerization. After high-temperature pyrolysis treatment, the N-doped graphitized carbon layers wrapped cobalt (Co@CNs) absorber with porous structure was obtained, which exhibited high efficiency and adjustable EMW absorbing properties. The minimum reflection loss (RLmin) of Co@CN-60 approached −59.08 dB at 17.7 GHz with a thickness of 1.7 mm. The effective absorption bandwidth (EAB) reached 5.8 GHz with a corresponding thickness of 2.3 mm. Besides, the RLmin of Co@CN-90 reaches −44.07 dB at 14.5 GHz (thickness 2.0 mm), and the EAB is 5.9 GHz. Therefore, the porous core-shell Co@CNs nanocomposite is expected to be a promising EMW absorption material.
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