纳米片
材料科学
微波食品加热
吸收(声学)
微观结构
碳热反应
碳纤维
化学工程
打赌理论
钼酸铵
复合材料
复合数
纳米技术
冶金
化学
有机化学
催化作用
电信
锌
工程类
碳化物
计算机科学
作者
Lei Wang,Jiangtong Lu,Jiale Zhang,Jianbo Zhu
标识
DOI:10.1016/j.jcis.2023.03.071
摘要
Rational regulation of microstructure and components is vital for excellent microwave absorption performance. In this study, we report flower-like carbon nanosheet architectures embedded with ultrafine Mo2C as a microwave absorber, prepared via simple carbothermal reduction using Mo-polydopamine as the precursor. We found that the particle size of the obtained Mo2C/C composites could be simply tailored by the added ammonium molybdate content in the initial solution for the preparation of the Mo-polydopamine precursor. This helped tailor the BET surface area, which significantly impacts microwave absorption performance. The sample with a BET surface area of 173.31 m2g−1 displayed high-efficiency microwave absorption, and the effective absorbing band reached up to 7.04 GHz (10.96–18 GHz) with the matching thickness of 2.9 mm at relatively low filler loading (only 10 wt%). Thus, the excellent microwave absorption performance and simple preparation process of the flower-like Mo2C@C composites are promising for applications requiring lightweight and broadband microwave absorption.
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