0D-1D-2D multidimensionally assembled Co9S8/CNTs/MoS2 composites for ultralight and broadband electromagnetic wave absorption

被引：107
作者：
Sun, Xin [1 ,2 ]
Pu, Yanhui [1 ]
Wu, Fan [3 ]
He, Junzhe [2 ]
Deng, Gao [1 ]
Song, Zhiming [1 ]
Liu, Xiaofang [1 ]
Shui, Jianglan [1 ]
Yu, Ronghai [1 ]
机构：
[1] Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China
[2] Sci & Technol Electromagnet Scattering Lab, Beijing 100854, Peoples R China
[3] Jinshan Dadao, Representat Off Stationed Wuhan HJJZBB 1, Wuhan 430000, Hubei, Peoples R China
来源：
CHEMICAL ENGINEERING JOURNAL | 2021年 / 423卷
基金：
北京市自然科学基金; 中国国家自然科学基金;
关键词：
Electromagnetic wave absorption; Electromagnetic scattering suppression; Sulfide; Dielectric loss; LIGHTWEIGHT; GROWTH; NANOCOMPOSITES; ATTENUATION; MODULATION; FRAMEWORK; MOS2;
D O I：
10.1016/j.cej.2021.130132
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Rational design of hierarchical structure is essential for preparing high-performance electromagnetic wave (EMW) absorbing materials. Herein, 0D-1D-2D hybridized Co9S8/CNTs/MoS2 composite is prepared by assembling MoS2 nanosheets and Co9S8 particles on metal organic framework compound-derived CNT microcages. This multidimensionally hybridized structure can not only avoid the restacking of MoS2 nanosheets and the agglomeration of Co9S8 particles, but also maximize the synergistic effect of three components. CNT porous microcages with proper conductivity increase conduction loss and promote impedance matching. MoS2 nanosheets assemble into wrinkled surfaces, providing intrinsic polarization loss and increasing EMW scattering area. Randomly distributed Co9S8 particles work as dielectric additives to enhance interfacial polarization effect. Co9S8/CNTs/MoS2 composite exhibits significantly improved EMW absorbing properties in reducing filler loading and broadening absorption bandwidth. At an ultralow filler loading of 9 wt%, the minimum RL value achieves -35.4 dB, and the effective absorption bandwidth boosts to 8.4 GHz. By simulating the electric field distribution and radar scatter section, we further reveal the significant suppression effect of Co9S8/CNTs/MoS2 on electromagnetic scattering radiation.
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页数：9
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