构建异质结构的Fe @ Fe3C @碳纳米管/还原氧化石墨烯纳米复合材料，作为轻巧高效的微波吸收剂,Journal of Materials Chemistry C

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构建异质结构的Fe @ Fe3C @碳纳米管/还原氧化石墨烯纳米复合材料，作为轻巧高效的微波吸收剂
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2020-09-25 , DOI: 10.1039/d0tc04329j
Rui Wang _{1,

2,

3,

4,

5} , Xiaosi Qi _{1,

2,

3,

4,

5} , Ren Xie _{1,

2,

3,

4,

5} , Xiu Gong _{1,

2,

3,

4,

5} , Chaoyong Deng _{3,

4,

5,

6} , Wei Zhong _{5,

7,

8,

9}

Affiliation

为了利用碳材料的双损失机理，多种界面结构和引人入胜的性能，我们提出了一种简单的策略来精心设计和生产异结构的Fe @ Fe ₃ C @碳纳米管（CNTs）/氧化石墨烯（RGO）纳米复合材料通过水热反应和化学气相沉积的组合方法。由于碳纳米管含量的调节，结果表明设计的纳米复合材料的电磁（EM）和电磁波吸收特性可以通过分解温度来调节。所制备的Fe @ Fe ₃ C @ CNTs / RGO纳米复合材料同时具有极强的吸收能力和大的吸收带宽，且匹配厚度非常薄（d _m）。特别是，在500和550°C下获得的样品同时显示出非常低的最小反射损耗（RL _min）值，在15.16 GHz时为-62.29 dB，d _m值为1.79 mm ，在-d值为11.74 GHz时为-74.31 dB，而d _m值2.14毫米。它们的有效频率带宽（f _b）值为6.00 GHz，d _m值为1.87 mm，为6.00 GHz，d _m值为1.85 mm。与以前报道的代表性相关微波吸收剂（MAs）相比，设计的异质结构Fe @ Fe ₃C @ CNTs / RGO纳米复合材料可被用作良好的轻质和高效Mas，具有优异的综合EM波吸收性能。结果为构建高性能MA提供了一种新的有效策略。

"点击查看英文标题和摘要"

Constructing heterostructural Fe@Fe3C@carbon nanotubes/reduced graphene oxide nanocomposites as lightweight and high-efficiency microwave absorbers

To take advantage of the double loss mechanism, multiple interface structures and fascinating properties of carbon materials, we propose a simple strategy to elaborately design and produce the heterostructural Fe@Fe₃C@carbon nanotubes (CNTs)/reduced graphene oxide (RGO) nanocomposites by a combined method of hydrothermal reaction and chemical vapor deposition. Owing to the regulation of CNTs’ content, the results indicate that the electromagnetic (EM) and EM wave absorption properties of designed nanocomposites could be regulated by the decomposition temperature. The as-prepared Fe@Fe₃C@CNTs/RGO nanocomposites simultaneously presented extremely strong absorption capabilities and large absorption bandwidth with very thin matching thicknesses (d_m). In particular, the samples obtained at 500 and 550 °C simultaneously displayed very low minimum reflection loss (RL_min) values of −62.29 dB at 15.16 GHz with the d_m value of 1.79 mm and −74.31 dB at 11.56 GHz with the d_m value of 2.14 mm. Their effective frequency bandwidth (f_b) values were 6.00 GHz with the d_m value of 1.87 mm and 6.00 GHz with the d_m value of 1.85 mm. Compared to the previously reported representative related microwave absorbers (MAs), the designed heterostructure Fe@Fe₃C@CNTs/RGO nanocomposites, which could be utilized as good lightweight and high efficiency Mas, displayed superior comprehensive EM wave absorption properties. The results presented a new and effective strategy to construct high-performance MAs.

更新日期：2020-10-11

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