Citation: Lin Xiaoyu, Wang Jing, Chu Zengyong, Liu Dongqing, Guo Taotao, Yang Lingni, Huang Zhenyu, Mu Sitong, Li Shun. The optimization of hydrothermal process of MoS₂ nanosheets and their good microwave absorption performances[J]. Chinese Chemical Letters, ;2020, 31(5): 1124-1128. doi: 10.1016/j.cclet.2019.07.003 shu

The optimization of hydrothermal process of MoS₂ nanosheets and their good microwave absorption performances

Lin Xiaoyu ^a ,
Wang Jing ^a,*, ,
Chu Zengyong ^a ,
Liu Dongqing ^b ,
Guo Taotao ^a ,
Yang Lingni ^a ,
Huang Zhenyu ^a ,
Mu Sitong ^a ,
Li Shun ^b,*,

a.
College of Liberal Arts and Sciences, National University of Defense Technology, Changsha 410073, China
b.
College of Aeronautics and Astronautics, National University of Defense Technology, Changsha 410073, China

jingwang@nudt.edu.cn

linudt@163.com

Received Date: 10 April 2019
Revised Date: 21 June 2019
Accepted Date: 24 June 2019
Available Online: 2 July 2019

Figures(4)

In this study, flower-like MoS₂ constructed by nanosheets was synthesized by a simple hydrothermal method. The hydrothermal process was optimized and the effects of hydrothermal condition, including reaction temperature, reaction time and the ratio of Mo source to S source (Mo:S) in precursor, on microwave absorption performances and dielectric properties were investigated. Our results showed that when the reaction temperature was 180℃, the reaction time was 18 h, and the Mo:S was 1:3.5, the synthesized MoS₂ had the best performance:Its minimum reflection loss could reach -55.78 dB, and the corresponding matching thickness was 2.30 mm with a wide effective bandwidth of 5.17 GHz. Further researches on the microwave absorption mechanism revealed that in addition to the destructive interference of electromagnetic waves, various polarization phenomena such as defect dipole polarization were the main reasons for microwave loss. We believe that MoS₂ is a candidate for a practical microwave absorbent.
- MoS₂,
- Hydrothermal preparation,
- Microwave absorption performance,
- Process optimization,
- Microwave absorption mechanism
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The optimization of hydrothermal process of MoS₂ nanosheets and their good microwave absorption performances