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首页> 外文期刊>RSC Advances >Preparation and microwave absorption properties of multi-walled carbon nanotubes decorated with Ni-doped SnO2 nanocrystals
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Preparation and microwave absorption properties of multi-walled carbon nanotubes decorated with Ni-doped SnO2 nanocrystals

机译：用Ni掺杂的SnO2纳米晶体装饰多壁碳纳米管的制备和微波吸收性能

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摘要

In this work, Ni-doped SnO2@MWCNTs composites were synthesized by a facile one-step hydrothermal method. The morphology and structure of the as-prepared composites were characterized by XRD, SEM, TEM, XPS, FT-IR and Raman. It was found that the SnO2 nanoparticles were successfully anchored on the MWCNTs with a diameter of 3-5 nm and Ni2+ was successfully doped into the SnO2@MWCNTs. Moreover, the effect of the doped Ni molar percentage on the electromagnetic parameters and microwave absorbing properties of the Ni-doped SnO2@MWCNTs composites was studied in the 2-18 GHz frequency range. The results showed that the composites with 28.2% doped Ni content exhibited the best microwave absorbing properties. The maximum RL reached -39.2 dB at 8.2 GHz with a thickness of 2.5 mm, and the bandwidth of RL lower than -10 dB was 3.6 GHz (from 12.6 to 16.2 GHz) with a thickness of 1.5 mm. The excellent microwave absorbing properties could be attributed to the good impedance match, Debye relaxation, interfacial polarization and high conductivity of the MWCNTs component. It was believed that the Ni-doped SnO2@MWCNTs composites could be used as a new type of microwave absorbing materials against electromagnetic pollution.
机译：在这项工作中，通过容易的一步水热法合成了Ni掺杂的SnO2 @ MWCNTs复合材料。通过XRD，SEM，TEM，XPS，FT-IR和拉曼的特征在于制备的复合材料的形态和结构。发现SnO2纳米颗粒在直径为3-5nm的Mwcnts上成功锚定，Ni2 +成功掺杂到SnO2 @ mwcnts中。此外，在2-18GHz频率范围内研究了掺杂Ni摩尔百分比对Ni掺杂SnO2 @ MWCNTs复合材料的电磁参数和微波吸收性能的影响。结果表明，具有28.2％掺杂Ni含量的复合材料表现出最佳的微波吸收性能。最大RL达到-39.2 dB，厚度为2.5毫米，RL的带宽为-10 dB为3.6 GHz（从12.6到16.2GHz），厚度为1.5毫米。优异的微波吸收性能可归因于MWCNT部件的良好阻抗匹配，德比弛豫，界面极化和高导电性。据信Ni掺杂的SnO2 @ MWCNTs复合材料可用作针对电磁污染的新型微波吸收材料。

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  • 来源
    《RSC Advances》 |2015年第115期|共12页
  • 作者

    Lin Ling; Xing Honglong; Shu Ruiwen; Wang Lei; Ji Xiaoli; Tan Dexin; Gan Ying;

  • 作者单位

    Anhui Univ Sci &

    Technol Sch Chem Engn Huainan 232001 Peoples R China;

    Anhui Univ Sci &

    Technol Sch Chem Engn Huainan 232001 Peoples R China;

    Anhui Univ Sci &

    Technol Sch Chem Engn Huainan 232001 Peoples R China;

    Anhui Univ Sci &

    Technol Sch Chem Engn Huainan 232001 Peoples R China;

    Anhui Univ Sci &

    Technol Sch Chem Engn Huainan 232001 Peoples R China;

    Anhui Univ Sci &

    Technol Sch Chem Engn Huainan 232001 Peoples R China;

    Anhui Univ Sci &

    Technol Sch Chem Engn Huainan 232001 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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