Rational design of 2D hierarchically laminated Fe3O4@nanoporous carbon@rGO nanocomposites with strong magnetic coupling for excellent electromagnetic absorption applications,Journal of Materials Chemistry C

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Rational design of 2D hierarchically laminated Fe3O4@nanoporous carbon@rGO nanocomposites with strong magnetic coupling for excellent electromagnetic absorption applications
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2019/12/31 , DOI: 10.1039/c9tc06526a
Zhen Xiang _{1,

2,

3,

4,

5} , Juan Xiong _{1,

2,

3,

4,

5} , Baiwen Deng _{1,

2,

3,

4,

5} , Erbiao Cui _{2,

5,

6,

7} , Lunzhou Yu _{2,

5,

6,

7} , Qingwen Zeng _{5,

8,

9,

10} , Ke Pei _{5,

8,

9,

10} , Renchao Che _{5,

8,

9,

10} , Wei Lu _{1,

2,

3,

4,

5}

Affiliation

Developing electromagnetic absorption materials with a strong absorption ability and wide absorption bandwidth has attracted widespread attention in the field of electromagnetic shielding, but it still remains a great challenge. Herein, we successfully developed 2D hierarchically laminated Fe₃O₄@nanoporous carbon (NPC)@rGO magnetic/dielectric nanocomposites as high-performance microwave absorbers through a facile microwave-assisted approach. The rational design of the composition (Fe₃O₄, NPC and rGO) and the hierarchical microstructure provided the nanocomposite with a micro-scale 3D magnetic coupling network, a hierarchical dielectric carbon network and good impedance matching, which were identified by the off-axis electronic holography and electromagnetic characterization. As expected, the Fe₃O₄@NPC@rGO composites achieved a strong reflection loss of −72.6 dB, a matching thickness of 2.0 mm and a broad bandwidth of 5.5 GHz. Such excellent achievements encourage the development of hierarchical magnetic EMA absorbers and provide remarkable inspiration for designing high-performance microwave absorbers.

中文翻译：

具有强磁耦合的2D分层层压Fe3O4 @ nanoporous carbon @ rGO纳米复合材料的合理设计，适用于出色的电磁吸收应用

开发具有强吸收能力和宽吸收带宽的电磁吸收材料在电磁屏蔽领域引起了广泛的关注，但是仍然是一个巨大的挑战。在本文中，我们通过简便的微波辅助方法成功开发了二维分层层压的Fe ₃ O ₄纳米多孔碳（NPC）@rGO磁性/介电纳米复合材料，作为高性能微波吸收剂。合理设计成分（Fe ₃ O ₄，NPC和rGO）以及分层的微观结构为纳米复合材料提供了微米级的3D磁耦合网络，分层的介电碳网络和良好的阻抗匹配，这些特征已通过离轴电子全息图和电磁表征得以识别。正如预期的那样，Fe ₃ O ₄ @ NPC @ rGO复合材料实现了-72.6 dB的强反射损耗，2.0 mm的匹配厚度和5.5 GHz的宽带宽。如此出色的成就鼓励了分层磁性EMA吸收器的发展，并为设计高性能微波吸收器提供了非凡的灵感。

更新日期：2020-02-13

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