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Enhanced microwave absorption properties of polyaniline-modified porous Fe3O4@C nanosheets

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Abstract

The modification of flake-like porous Fe3O4@C core–shell nanorods having 25–50 nm pore diameter with polyaniline nanosheets is described. The microwave absorption properties of Fe3O4@C, polyaniline, and Fe3O4@C/polyaniline composite are analyzed according to their electromagnetic parameters. The analysis of the electromagnetic parameters indicates that dielectric loss, which, along with the impedance matching, is improved by the addition of polyaniline, is the main factor governing the microwave absorption. Compared with Fe3O4@C nanorods and polyaniline, the Fe3O4@C/polyaniline nanosheets display superior microwave absorption properties, with a maximum reflection loss of − 43.5 dB at 7.1 GHz, which renders it a promising candidate for the development of microwave absorption materials.

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Acknowledgement

The authors thank the financial support of the National Key R&D Program of China (Grant No. 2016YFA0202302), the National Natural Science Foundation of China (Grant Nos. 61527817 and 61875236), Overseas Expertise Introduction Center for Discipline Innovation, 111 Center of China, and National Science Foundation of USA (Grant No. DMR-1505852).

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Authors and Affiliations

  1. Institute of Optoelectronic Technology, Beijing Jiaotong University, Beijing, 100044, China

    Chen Fu, Dawei He, Yongsheng Wang & Xuan Zhao

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  1. Chen Fu
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  2. Dawei He
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  3. Yongsheng Wang
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  4. Xuan Zhao
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Correspondence to Dawei He.

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Fu, C., He, D., Wang, Y. et al. Enhanced microwave absorption properties of polyaniline-modified porous Fe3O4@C nanosheets. J Mater Sci: Mater Electron 30, 11907–11913 (2019). https://doi.org/10.1007/s10854-019-01528-1

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