材料科学
微观结构
复合材料
反射损耗
复合数
电磁辐射
碳化
蜂窝结构
吸收(声学)
多孔性
极化(电化学)
光学
扫描电子显微镜
化学
物理
物理化学
作者
Jie Cheng,Lei Cai,Wei Lu,Fei Pan,Dong Yao,Xiaojie Zhu,Haojie Jiang,Zhang Xiang,Zhen Xiang,Wei Lü
标识
DOI:10.1016/j.cej.2021.134284
摘要
The increasingly serious electromagnetic pollution has caused an urgent demand for easy preparation, sustainable and low-cost electromagnetic absorbing materials with super absorption capacity. Herein, inspired by the nature, spherical MoS2 nanoflowers/undaria pinnatifida-derived honeycomb-like porous carbon composites were fabricated by a simple carbonization and subsequent hydrothermal process. The unique honeycomb-like porous microstructure of undaria pinnatifida facilitates the generation of multiple scattering and reflections and the construction of interconnected conducting networks, while the rich porous structure provides a vast surface for the growth of MoS2 crystals. In addition, MoS2 significantly not only improved the impedance matching of the composites but also greatly enhanced the polarization loss due to the simultaneous growth of MoS2 nanoflowers on the surface and in the internal pores of the undaria pinnatifida. As a result, the hybrids achieved a maximum electromagnetic wave (EMW) absorption capacity with a reflection loss (RL) value of up to −75.94 dB at a thickness of only 1.68 mm. The results indicated that the C/MoS2 hybrids can be a new prospective candidate as sustainable EMW absorbers with low density and superb EMW absorption performance.
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