MOFs derived magnetic porous carbon microspheres constructed by core-shell Ni@C with high-performance microwave absorption
MOFs derived magnetic porous carbon microspheres constructed by core-shell Ni@C with high-performance microwave absorption
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DOI：
10.1016/j.jmst.2021.02.011
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发表时间：
2021-03-24
影响因子：
10.9
通讯作者：
Liu, Panbo
中科院分区：
文献类型：
--
作者：
Gao, Sai;Zhang, Guozheng;Liu, Panbo
轻量化和高性能是金属有机骨架(MOF)微波吸波材料的两个决定性因素。然而，已报道的大多数MOF衍生吸波材料通常都具有较高的填充量。本论文采用热解法制备了一系列直径可调、比表面积大的MOF磁性多孔炭微球。由均匀分布的核壳结构的Ni@C构成的磁性多孔炭微球具有高性能的微波吸收性能，填充量为10wt%。考虑到薄膜的介孔结构、匹配阻抗、较强的电导损耗、增强的偶极/界面极化以及较强的磁耦合网络，在2.6 mm处可以获得最小的反射损耗为-60dB，吸收带宽为7.0 GHz。当厚度为4 mm时，带宽可达10.2 GHz。此外，与其他MOF衍生吸波材料相比，本工作为合成具有轻质高效微波吸收性能的多孔炭微球提供了一种简单的策略。(C)由爱思唯尔有限公司代表《材料科学与技术杂志》编辑部出版的《2021》。
Lightweight and high-performance are two determining factors for metal-organic-frameworks (MOFs) derived microwave absorbers. However, most of the reported MOFs derived absorbers usually possess high filler loading. Herein, a series of MOFs derived magnetic porous carbon microspheres with tunable diameter and high specific surface area have been synthesized via a pyrolysis process. The synthesized magnetic porous carbon microspheres, constructed by uniformly distributed core-shell Ni@C, exhibit high-performance microwave absorption with a low filler loading of 10 wt%. Considering the mciro-mesoporous structures, matched impedance, strong conductive loss, enhanced dipolar/interfacial polarization as well as strong magnetic coupling network, a minimum reflection loss of-60 dB and an absorption bandwidth of 7.0 GHz can be achieved at 2.6 mm. Moreover, the bandwidth reaches as wide as 10.2 GHz when the thickness is 4 mm. In addition, compared with other MOFs derived absorbers, this work provides us a simple strategy for the synthesis of porous carbon microspheres with lightweight and high-performance microwave absorption for practical applications. (c) 2021 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.