期刊
CRYSTAL GROWTH & DESIGN
卷 22, 期 12, 页码 7339-7348出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.cgd.2c00963
关键词
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资金
- National Natural Science Foundation of China [51908458]
- Natural Science Foundation of Shannxi Province, China [2020JQ-036]
- Key projects of Shannxi Province, China [2021GXLH-Z-070]
- Fundamental Research Funds for the Central Universities of China [xzy022022004]
In this study, a heterogeneous structure containing Mo2C, metal alloys, and carbon nanotubes was synthesized and a bimetallic regulation mechanism was implemented to enhance the electromagnetic wave absorption performance. The material exhibited strong interfacial polarization loss at high frequencies and showed a wide absorption bandwidth and low reflection loss.
To meet the requirement of intense electromagnetic wave absorption capacity, a rational electronic regulation mechanism of magnetic metals is implemented. In this work, the heterogeneous structures containing Mo2C, metal alloys, and carbon nanotubes were synthesized by the deposition and carbonization of melamine. In contrast to single metallic elemental regulation, the electronic structure of Mo2C is obviously shifted by bimetallic regulation, which results in strong polarization relaxation in the electromagnetic field. Herein, benefiting from the tunable electronic structure between the Mo2C and CoNi, the CoNi@Mo2C-CNT composites exhibited strong interfacial polarization loss at high frequencies as well as excellent electromagnetic wave absorption performance with an effective absorption bandwidth of 5.9 GHz (2.1 mm) and a minimum reflection loss of -49.7 dB. These results indicate that the metal and Mo2C heterostructure can be synthesized successfully and that the electronic binding adjustment enhances the interface polarization loss.
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