Lightweight and High-Performance Microwave Absorber Based on 2D WS2-RGO Heterostructures

Deqing Zhang; Tingting Liu; Junye Cheng; Qi Cao; Guangping Zheng; Shuang Liang; Hao Wang; Mao-Sheng Cao

doi:10.1007/s40820-019-0270-4

Lightweight and High-Performance Microwave Absorber Based on 2D WS₂-RGO Heterostructures

Nanomicro Lett. 2019 May 9;11(1):38. doi: 10.1007/s40820-019-0270-4.

Authors

Deqing Zhang^#^{1

2}, Tingting Liu^#¹, Junye Cheng³, Qi Cao^{4

5}, Guangping Zheng⁶, Shuang Liang¹, Hao Wang⁷, Mao-Sheng Cao⁸

Affiliations

¹ School of Materials Science and Engineering, Qiqihar University, Qiqihar, 161006, People's Republic of China.
² School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, People's Republic of China.
³ Guangdong Provincial Key Laboratory of Micro/Nano Optomechatronics Engineering, College of Mechatronics and Control Engineering, Shenzhen University, Shenzhen, 518060, People's Republic of China. jycheng4-c@my.cityu.edu.hk.
⁴ Department of Chemistry, School of Science, The University of Tokyo, Tokyo, 113-8656, Japan.
⁵ Department of Mechanical Engineering, School of Engineering, The University of Tokyo, Tokyo, 113-8656, Japan.
⁶ Department of Mechanical Engineering, Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, People's Republic of China.
⁷ Guangdong Provincial Key Laboratory of Micro/Nano Optomechatronics Engineering, College of Mechatronics and Control Engineering, Shenzhen University, Shenzhen, 518060, People's Republic of China. whao@szu.edu.cn.
⁸ School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, People's Republic of China. caomaosheng@bit.edu.cn.

^# Contributed equally.

Abstract

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 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. The results indicate these lightweight WS₂-rGO nanosheets to be potential materials for practical electromagnetic wave-absorbing applications.

Keywords: 2D WS2 nanosheets; Heterostructure; Microwave absorption; Reduced graphene oxide.