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Nano Research 2017, 10(3): 980-990 https://doi.org/10.1007/s12274-016-1357-6
Research Article | Issue | Published: 07 December 2016

Investigation on the broadband electromagnetic wave absorption properties and mechanism of Co3O4-nanosheets/reduced-graphene-oxide composite

Show Author's Information Yi Ding1,§,  Zheng Zhang1,§,  Baohe Luo1,  Qingliang Liao1( ),  Shuo Liu1,  Yichong Liu1,  Yue Zhang1,2( )
State Key Laboratory for Advanced Metals and MaterialsSchool of Materials Science and Engineering, University of Science and Technology BeijingBeijing100083China
Beijing Municipal Key Laboratory of New Energy Materials and TechnologiesUniversity of Science and Technology BeijingBeijing100083China

§ These authors contributed equally to this work.

Keywords:
Raman spectroscopy, reduced graphene oxide, dielectric loss, cobaltosic oxide nanosheets, X-ray techniques
Cite this article:
Ding Y, Zhang Z, Luo B, et al. Investigation on the broadband electromagnetic wave absorption properties and mechanism of Co3O4-nanosheets/reduced-graphene-oxide composite. Nano Research, 2017, 10(3): 980-990. https://doi.org/10.1007/s12274-016-1357-6
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Abstract Full text About this article

A cobaltosic-oxide-nanosheets/reduced-graphene-oxide composite (CoNSs@RGO) was successfully prepared as a light-weight broadband electromagnetic wave absorber. The effects of the sample thickness and amount of composite added to paraffin samples on the absorption properties were thoroughly investigated. Due to the nanosheet-like structure of Co3O4, the surface-to-volume ratio of the wave absorption material was very high, resulting in a large enhancement in the absorption properties. The maximum refection loss of the CoNSs@RGO composite was–45.15 dB for a thickness of 3.6 mm, and the best absorption bandwidth with a reflection loss below–10 dB was 7.14 GHz with a thickness of 2.9 mm. In addition, the peaks of microwave absorption shifted towards the low frequency region with increasing thickness of the absorbing coatings. The mechanism of electromagnetic wave absorption was attributed to impedance matching of CoNSs@RGO as well as the dielectric relaxation and polarization of RGO. Compared to previously reported absorbing materials, CoNSs@RGO showed better performance as a lightweight and highly efficient absorbing material for application in the high frequency band.


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About this article

Investigation on the broadband electromagnetic wave absorption properties and mechanism of Co3O4-nanosheets/reduced-graphene-oxide composite

Show Author's information Yi Ding1,§, Zheng Zhang1,§, Baohe Luo1, Qingliang Liao1( ), Shuo Liu1, Yichong Liu1, Yue Zhang1,2( )
State Key Laboratory for Advanced Metals and MaterialsSchool of Materials Science and Engineering, University of Science and Technology BeijingBeijing100083China
Beijing Municipal Key Laboratory of New Energy Materials and TechnologiesUniversity of Science and Technology BeijingBeijing100083China

§ These authors contributed equally to this work.

Abstract

A cobaltosic-oxide-nanosheets/reduced-graphene-oxide composite (CoNSs@RGO) was successfully prepared as a light-weight broadband electromagnetic wave absorber. The effects of the sample thickness and amount of composite added to paraffin samples on the absorption properties were thoroughly investigated. Due to the nanosheet-like structure of Co3O4, the surface-to-volume ratio of the wave absorption material was very high, resulting in a large enhancement in the absorption properties. The maximum refection loss of the CoNSs@RGO composite was–45.15 dB for a thickness of 3.6 mm, and the best absorption bandwidth with a reflection loss below–10 dB was 7.14 GHz with a thickness of 2.9 mm. In addition, the peaks of microwave absorption shifted towards the low frequency region with increasing thickness of the absorbing coatings. The mechanism of electromagnetic wave absorption was attributed to impedance matching of CoNSs@RGO as well as the dielectric relaxation and polarization of RGO. Compared to previously reported absorbing materials, CoNSs@RGO showed better performance as a lightweight and highly efficient absorbing material for application in the high frequency band.

Keywords: Raman spectroscopy, reduced graphene oxide, dielectric loss, cobaltosic oxide nanosheets, X-ray techniques

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Publication history
Copyright
Acknowledgements

Publication history

Received: 11 August 2016
Revised: 03 November 2016
Accepted: 05 November 2016
Published: 07 December 2016
Issue date: March 2017

Copyright

© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2016

Acknowledgements

Acknowledgements

This work was supported by the National Basic Research Program of China (No. 2013CB932602), the Program of Introducing Talents of Discipline to Universities (No. B14003), National Natural Science Foundation of China (Nos. 51527802 and 51232001), Beijing Municipal Science & Technology Commission, and the Fundamental Research Funds for Central Universities.

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