1. Construction of one-dimensional hierarchical MoS2/Ni3S2 composites with enhanced interfacial polarization and improved wideband microwave absorption.
- Author
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Luo, Kaicheng, Zhao, Biao, Xu, Chunyang, Liang, Chongyun, Zhang, Chang, Du, Yiqian, Lv, Xiaowei, Zhang, Jincang, Wu, Limin, and Che, Renchao
- Subjects
ELECTROMAGNETIC wave absorption ,ELECTRON holography ,TRANSMISSION electron microscopes ,MICROWAVES ,ABSORPTION ,ELECTRON energy loss spectroscopy - Abstract
• Conductive 1D hierarchical cable-like MoS2/Ni3S2 composites were successfully synthesized via a one-step hydrothermal strategy. • The mechanism and superiorities of interfaces are demonstrated by means of transmission electron microscope holography, etc. • The optimal MoS2/Ni3S2 composite realized remarkable reflection loss (RL) at 4.9 GHz (−53.5 dB, 4 mm) and wide effective bandwidth (4.8 GHz, 1.5 mm). The construction of one-dimensional (1D) sulfides has attracted extensive attention for improving microwave absorption (MA) performance owing to the anisotropic conductive networks. However, the synthesis of conductive 1D hierarchical materials with unique interfacial polarization and excellent MA properties remains challenging. In this study, cable-like MoS 2 /Ni 3 S 2 was synthesized by a one-step hydrothermal strategy. The complex permittivity of the binary composites could be improved by tuning the thickness of the MoS 2 coating. Importantly, the construction of heterogeneous contacts by MoS 2 and Ni 3 S 2 contributed to enhanced polarization loss, and the charge distribution was validated by electron holography. The wide efficient absorption bandwidth can reach above 4.8 GHz at a thin thickness. These new discoveries shed light on novel structures for 1D sulfide materials and the design of functional core-shell composites for microwave absorption. A hierarchical structure of MoS 2 /Ni 3 S 2 is synthesized via a simple one-step hydrothermal method. The construction of heterogeneous contacts by MoS 2 and Ni 3 S 2 contributed to enhanced polarization loss and microwave absorption performance. [Display omitted] [ABSTRACT FROM AUTHOR]
- Published
- 2024
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