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Research Article

Defect and interface engineering in core@shell structure hollow carbon@MoS2 nanocomposites for boosted microwave absorption performance

Junxiong Xiao1, Xiaosi Qi1,2( ), Xiu Gong1, Qiong Peng1, Yanli Chen1, Ren Xie1, Wei Zhong2( )
College of Physics, Guizhou Province Key Laboratory for Photoelectrics Technology and Application, Guizhou University, Guiyang 550025, China
National Laboratory of Solid State Microstructures and Jiangsu Provincial Laboratory for NanoTechnology, Nanjing University, Nanjing 210093, China
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Graphical Abstract

Defect and interface engineering in core@shell structure hollow carbon@MoS2 nanocomposites effectively improves the microwave absorption performance.

Abstract

Defect and interface engineering are efficient approaches to adjust the physical and chemical properties of nanomaterials. In order to effectively utilize these strategies for the improvement of microwave absorption properties (MAPs), in this study, we reported the synthesis of hollow carbon shells and hollow carbon@MoS2 nanocomposites by the template-etching and template-etching-hydrothermal methods, respectively. The obtained results indicated that the degree of defect for hollow carbon shells and hollow carbon@MoS2 could be modulated by the thickness of hollow carbon shell, which effectively fulfilled the optimization of electromagnetic parameters and improvement of MAPs. Furthermore, the microstructure investigations revealed that the precursor of hollow carbon shells was encapsulated by the sheet-like MoS2 in high efficiency. And the introduction of MoS2 nanosheets acting as the shell effectively improved the interfacial effects and boosted the polarization loss capabilities, which resulted in the improvement of comprehensive MAPs. The elaborately designed hollow carbon@MoS2 samples displayed very outstanding MAPs including strong absorption capabilities, broad absorption bandwidth, and thin matching thicknesses. Therefore, this work provided a viable strategy to improve the MAPs of microwave absorbers by taking full advantage of their defect and interface engineering.

Keywords

core@shell structurehollow carbon shellshollow carbon@MoS2defect and interface engineeringimproved microwave absorption properties

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Nano Research
Volume 15 Issue 9,
September 2022
Pages 7778-7787
DOI: 10.1007/s12274-022-4625-7
Cite this article:
Xiao J, Qi X, Gong X, et al. Defect and interface engineering in core@shell structure hollow carbon@MoS2 nanocomposites for boosted microwave absorption performance. Nano Research, 2022, 15(9): 7778-7787. https://doi.org/10.1007/s12274-022-4625-7
Topics:
Amorphous carbon DepositionNanostructured materialsStructural optimization
Part of a topical collection:
The winners of “Top Papers Award” in 2023EM Wave Functional Materials

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Received: 08 May 2022
Revised: 29 May 2022
Accepted: 30 May 2022
Published: 08 July 2022
© Tsinghua University Press 2022
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