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首页> 外文期刊>Materials Science and Engineering >Vanadium nitride@carbon nanowires with inner porous structure for high-efficient microwave absorption
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Vanadium nitride@carbon nanowires with inner porous structure for high-efficient microwave absorption

机译：氮化钒@碳纳米线具有内部多孔结构，用于高效微波吸收

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摘要

Herein, N-doped carbon coated vanadium nitride nanowires (VN@NC NWs) with inner porous structure were synthesized by coating a thin layer of a carbon precursor of polydopamine (PDA) on ultralong V_2O_5 NWs followed by nitridation. The amorphous carbon coating could ensure the one-dimensional (1D) structure, as well as produce the inner pores during nitriding progress. The formational 1D porous architecture, high-crystallized VN nanoparticles and homogeneous N-doped carbon coating synergistically improved the materials' impedance match and thus enhanced their microwave absorption performances. The minimum reflection loss (RL_(min)) of the optimal samples/paraffin hybrid with 20 wt% was -60.2 dB with an effective absorption bandwidth (EAB, RL ＜ -10 dB) of 3.8 GHz at a thickness of 2.75 mm, and its maximal EAB of 5.8 GHz with a RL_(min) of -49.8 dB at a thickness of 2.25 mm. Hence, the inner porous VN@NC NWs in this case would be as a high-efficient microwave absorber.
机译：这里，通过在超伸缩V_2O_5NWS上涂覆多麦多梅（PDA）的薄层，合成具有内部多孔结构的N掺杂的碳涂覆的氮化钒纳米线（VN @ NC NWS），然后在超龙V_2O_5NW上涂覆氮。 无定形碳涂层可以确保一维（1D）结构，以及在氮化过程中产生内部孔。 形成1D多孔结构，高结晶的VN纳米颗粒和均匀的N掺杂碳涂层协同改善了材料的阻抗匹配，从而提高了它们的微波吸收性能。 最佳样品/石蜡杂交物的最小反射损失（RL_（min），20wt％为-60.2dB，其有效吸收带宽（EAB，R1 <-10dB）为3.8GHz，厚度为2.75mm， 其最大EAB为5.8 GHz，RL_（min）为-49.8 dB，厚度为2.25 mm。 因此，在这种情况下，内部多孔VN @ NC NWS将是一种高效的微波吸收器。

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  • 来源
    《Materials Science and Engineering》 |2021年第7期|115156.1-115156.8|共8页
  • 作者

    Xiaoyan Yuan; Ruiqin Wang; Shengyan Huang; Aiming Sha; Shouwu Guo;

  • 作者单位

    School of Materials Science and Engineering Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials Shaanxi University of Science and Technology Xi'an 710021 China;

    School of Materials Science and Engineering Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials Shaanxi University of Science and Technology Xi'an 710021 China;

    School of Materials Science and Engineering Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials Shaanxi University of Science and Technology Xi'an 710021 China;

    School of Materials Science and Engineering Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials Shaanxi University of Science and Technology Xi'an 710021 China;

    School of Materials Science and Engineering Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials Shaanxi University of Science and Technology Xi'an 710021 China;

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  • 正文语种 eng
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  • 关键词

    N-doped carbon coated VN nanowires; Porous structure; Microwave absorption performance;

    机译：n掺杂的碳涂覆的Vn纳米线;多孔结构;微波吸收性能;

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