材料科学
衰减
吸收(声学)
宽带
复合材料
介孔材料
热液循环
空隙(复合材料)
电磁辐射
纳米技术
化学工程
光学
催化作用
化学
生物化学
物理
工程类
作者
Zizhuang He,Hanxiao Xu,Lingzi Shi,Xiangru Ren,Jie Kong,Panbo Liu
出处
期刊:Small
[Wiley]
日期:2023-09-28
卷期号:20 (6)
被引量:50
标识
DOI:10.1002/smll.202306253
摘要
The synergistic effect of hollow cavities and multiple hetero‐interfaces displays huge advantages in achieving lightweight and high‐efficient electromagnetic wave absorption, but still confronts huge challenges. Herein, hierarchical Co 2 P/CoS 2 @C@MoS 2 composites via the self‐sacrificed strategy and a subsequent hydrothermal method have been successfully synthesized. Specifically, ZIF‐67 cores first act as the structural template to form core‐shell ZIF‐67@poly(cyclotriphosphazene‐co‐4,4′‐sulfonyldiphenol) (ZIF‐67@PZS) composites, which are converted into hollow Co 2 P@C shells with micro‐mesoporous characteristics because of the gradient structural stabilities and preferred coordination ability. The deposition of hierarchical MoS 2 results in phase transition (Co 2 P→Co 2 P/CoS 2 ), yielding the formation of hierarchical Co 2 P/CoS 2 @C@MoS 2 composites with hollow cavities and multiple hetero‐interfaces. Benefiting from the cooperative advantages of hollow structure, extra N,P,S‐doped sources, lattice defects/vacancies, diverse incoherent interfaces, and hierarchical configurations, the composites deliver superior electromagnetic wave capability (−56.6 dB) and wideband absorption bandwidth (8.96 GHz) with 20 wt.% filler loading. This study provides a reliable and facile strategy for the precise construction of superior electromagnetic wave absorbents with efficient absorption attenuation.
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