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Preparation and electromagnetic wave absorption properties of CoNi@SiO2 microspheres decorated graphene–polyaniline nanosheets

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Abstract

In this work, we successfully parepared the quaternary composites of CoNi@SiO2@graphene@PANI via a four-step method. The structures, chemical composition and morphologies of obtained composites are analyzed in detail. The electron microscopy results show spherical CoNi@SiO2 particles evenly dispersed into the surface of graphene@polyaniline nanosheets. The electromagnetic parameters indicate that CoNi@SiO2@graphene@PANI exhibits enhanced electromagnetic absorption properties compared to CoNi@SiO2, which can be mainly attributed to the improved impedance matching and multi-interfacial polarization. The maximum reflection loss of CoNi@SiO2@graphene@PANI can reach − 43 dB at 15.4 GHz and the absorption bandwidth with the reflection loss exceeding − 10 dB is 5.7 GHz (from 12.3 to 18 GHz) with the thickness of 2 mm. Our results demonstrate the quaternary composites composed of CoNi@SiO2 microparticles and rGO–PANI nanocomposites can serve as light weight and high-performance EM absorbing material.

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Acknowledgements

This work was financially supported by the the National Natural Science Foundation of China (51672222), the Spaceflight Innovation Foundation of China, the Spaceflight Foundation of China (2014-HT-XGD) and the Seed Foundation of Innovation and Creation for Graduate Students in Northwestern Polytechnical University (Z2017048).

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Authors and Affiliations

  1. MOE Key Laboratory of Material Physics and Chemistry under Extrodinary Conditions, Ministry of Education, School of Science, Northwestern Polytechnical University, Xi’an, 710072, People’s Republic of China

    Ying Huang, Jing Yan, Suhua Zhou, Jiayu Yang & Panbo Liu

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  1. Ying Huang
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  2. Jing Yan
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  3. Suhua Zhou
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  4. Jiayu Yang
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  5. Panbo Liu
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Correspondence to Ying Huang.

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Huang, Y., Yan, J., Zhou, S. et al. Preparation and electromagnetic wave absorption properties of CoNi@SiO2 microspheres decorated graphene–polyaniline nanosheets. J Mater Sci: Mater Electron 29, 70–79 (2018). https://doi.org/10.1007/s10854-017-7889-z

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  • DOI: https://doi.org/10.1007/s10854-017-7889-z

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