Application of N-doped NiCo2O4/NiO/Co3O4 composites rich in oxygen vacancies in electromagnetic wave absorption

被引：0
作者：
Li, Junkang [1 ]
Yang, Yiqing [3 ]
Ma, Yongqing [1 ]
Zhu, Chuhong [1 ]
Wang, Meiling [1 ]
Dai, Zhenxiang [2 ]
Zheng, Ganhong [1 ]
Ding, Wei [3 ]
Sheng, Zhigao [4 ]
机构：
[1] Anhui Univ, Sch Mat Sci & Engn, Hefei 230601, Peoples R China
[2] Anhui Univ, Sch Phys & Optoelect Engn, Hefei 230601, Peoples R China
[3] Anhui Univ, Inst Phys Sci & Informat Technol, Hefei 230601, Peoples R China
[4] Chinese Acad Sci, High Magnet Field Lab, Hefei 230031, Peoples R China
来源：
NANOTECHNOLOGY | 2024年 / 35卷 / 44期
基金：
中国国家自然科学基金;
关键词：
NiCo2O4/NiO/Co3O4; composites; N-doped; oxygen vacancy; microwave absorption; PERFORMANCE; MORPHOLOGY; FRAMEWORKS;
D O I：
10.1088/1361-6528/ad6c57
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
In this work, N-doped and oxygen vacancy-rich NiCo2O4/NiO/Co3O4 composites are synthesized by the direct calcination method. Noticeably, by changing the additive concentrations of urea dissolved in DMF (N-N dimethylformamide), the electromagnetic wave (EMW) absorption abilities of NiCo2O4/NiO/Co3O4 composite effectively. A maximum reflection loss (RLmax) value at 12.94 GHz for a 2.8 mm thick sheet is -29.76 dB, while its effective absorption bandwidth (RL < -10 dB) reaches 4.21 GHz. In-depth research of possible mechanisms of EMW absorption enhancement. Owing to its simple preparation method and superb EMW absorption properties, the NiCo2O4/NiO/Co3O4 composites have a chance to be suitable candidates for high-property EMW absorbers.
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收藏
页数：11
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