24August2019

Nano-Micro Letters

Lightweight and High-Performance Microwave Absorber Based on Two-Dimensional WS2–Reduced Graphene Oxide Heterostructures

Deqing Zhang1, 5, †, Tingting Liu1, †, Junye Cheng2, *, Qi Cao3, Guangping Zheng4, Shuang Liang1, Hao Wang2, *, Mao-Sheng Cao5, *

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Nano-Micro Lett. (2019) 11: 38

First Online: 9 May 2019 (Article)

DOI:10.1007/s40820-019-0270-4

*Corresponding author. E-mail: whao@szu.edu.cn (Hao Wang);  jycheng4-c@my.cityu.edu.hk (Junye Cheng) ; caomaosheng@bit.edu.cn (Mao-Sheng Cao)

 

Abstract

 


Toc

Two-dimensional (2D) nanomaterials are categorized as a new class of microwave absorption (MA) materials owing to their high specific surface area and peculiar electronic properties. In this study, 2D WS2–reduced graphene oxide (WS2–rGO) heterostructure nanosheets were synthesized via a facile hydrothermal process; moreover, their dielectric and MA properties were reported for the first time. Remarkably, the maximum reflection loss (RL) of the sample-wax composites containing 40 wt% WS2–rGO nanosheets was −41.5 dB at a thickness of 2.7 mm; furthermore, the bandwidth where RL < −10 dB can reach up to 13.62 GHz (4.38–18 GHz). Synergistic mechanisms derived from the interfacial dielectric coupling and multiple-interface scattering after hybridization of WS2 with rGO were discussed to explain the drastically enhanced microwave absorption performance of heterostructure nanosheets as compared to those of pristine WS2 or rGO. The results indicate these light-weight WS2–rGO nanosheets to be potential materials for practical electromagnetic-wave-absorbing applications.


 

Keywords

2D WS2 nanosheets; Reduced graphene oxide; Heterostructure; Microwave absorption

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