文献类型：期刊文献

英文题名：Self-assembly magnetized 3D hierarchical graphite carbon-based heterogeneous yolk-shell nanoboxes with enhanced microwave absorption

作者：Ma, Wenjun[1];He, Peng[1];Xu, Jian[1];Liu, Xiaoyun[1];Lin, Shaoliang[1];Cui, Zhong-Kai[2];Zuo, Peiyuan[1];Zhuang, Qixin[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Adv Polymer Mat Shanghai, Shanghai 200237, Peoples R China;[2]Southern Med Univ, Sch Basic Med Sci, Guangzhou 510515, Peoples R China

年份：2022

卷号：10

期号：21

起止页码：11405

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY A

收录：;EI(收录号：20222512247940);WOS:【SCI-EXPANDED(收录号:WOS:000796001300001)】；

基金：This work was supported by the National Natural Science Foundation of China (52073091, 51773060, and 22171086) and Natural Science Foundation of Shanghai (20ZR1414600).

语种：英文

外文关键词：Graphite - Iron compounds - Nanotechnology - Self assembly - Silica

摘要：Rational manipulation of three-dimensional (3D) hierarchical structures can considerably enhance the performance of microwave absorption (MA) through the strong interface polarization caused by the abundant heterogeneous interfaces between low-dimensional components and the reflection loss resulting from voids and spaces within heterostructures. In this work, the yolk-shell structure with a 3D hierarchical graphite carbon (GC)/magnetic particle cubic core and an amorphous carbon shell is rationally constructed. With the help of the MOF-derived FeCo/GC template and the morphological stability role of residual SiO2 during the hydrothermal process, the reassembly of lamellar GC-based cores is obtained. The wise combination of GC and amorphous carbon provides the possibility of an appropriate graphitization degree. Moreover, nano-scale 3D magnetic coupling networks and various forms of component losses also play an active role in efficient attenuation. Therefore, the as-prepared absorber exhibits impressive MA performance, with an optimal reflection loss of as low as -60.03 dB and an effective absorption bandwidth of 7.04 GHz. This work provides a certain guideline for preparing 3D hierarchical graphite carbon-based heterogeneous microwave absorbers with improved performance, which can be achieved by the synergistic effect of multiple interfaces and multiple components.