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Issue 44, 2019
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Novel hierarchical RGO/MoS2/K-αMnO2 composite architectures with enhanced broadband microwave absorption performance

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Abstract

Here we report the successful preparation of hierarchical structures of reduced graphene oxide/molybdenum disulfide/potassium-alpha manganese dioxide (RGO/MoS2/K-αMnO2) composites via an improved hydrothermal method. The obtained composites display unique ternary architectures in which uniform K-αMnO2 nanospheres as antennas are distributed on the surface of RGO/MoS2 composites. The minimum reflection losses (RL) of MoS2, RGO/MoS2 and RGO/MoS2/K-αMnO2 in the frequency of 2.0–18.0 GHz are −7.8 dB, −21.7 dB and −71.7 dB with a thickness of 8.0 mm, 1.8 mm and 3.8 mm, respectively. Moreover, the RL values of RGO/MoS2/K-αMnO2 composites exceeding −20 dB have been achieved in broad frequency bands of 2.5–18.0 GHz. The addition of K-αMnO2 adjusts the balance between εr and μr of the composites, resulting in a larger α value and a higher matching impedance ratio. The excellent microwave absorption performance of the ternary composites mainly originates from a particular hierarchical antenna-like structure, good impedance matching, polarization relaxation, and the efficient complementarities between RGO/MoS2 and K-αMnO2. Finally, this RGO/MoS2/K-αMnO2 composite with strong absorption and wide frequency will be a promising material in the field of microwave absorption.

Graphical abstract: Novel hierarchical RGO/MoS2/K-αMnO2 composite architectures with enhanced broadband microwave absorption performance

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Publication details

The article was received on 28 Aug 2019, accepted on 09 Oct 2019 and first published on 10 Oct 2019


Article type: Paper
DOI: 10.1039/C9TC04734D
J. Mater. Chem. C, 2019,7, 13878-13886

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    Novel hierarchical RGO/MoS2/K-αMnO2 composite architectures with enhanced broadband microwave absorption performance

    Q. Hu, Y. Fang, J. Wang, Z. Du, Q. Song, Z. Guo, Y. Huang, J. Lin and C. Tang, J. Mater. Chem. C, 2019, 7, 13878
    DOI: 10.1039/C9TC04734D

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