期刊
ACS APPLIED MATERIALS & INTERFACES
卷 12, 期 21, 页码 24102-24111出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c03105
关键词
mesoporous carbon spheres; nitrogen-doped carbon; periodic structure; Co/Co3O4 nanoparticles; microwave absorption
资金
- Natural Science Foundation of China [51902083, 21606068]
- National Defense Key Laboratory Fund [6142905180201]
- Higher Education Science and Technology Research Project of Hebei Province [ZD2019087]
- Natural Science Foundation of Tianjin City [17JCQNJC06300]
Although various bio-inspired materials with outstanding mechanical, acoustic, and optic properties have been developed, bio-inspired materials for microwave absorption applications are rarely reported. Herein, under the inspiration of the opal structure, for the first time, a kind of Co@Co3O4/nitrogen-doped (N-doped) mesoporous carbon sphere (Co@Co3O4/NMCS) with a periodic three-dimensional structure toward microwave absorption application was designed and synthesized. The microwave absorption performance was optimized with respect to the content of Co@Co3O4 nanoparticles. Co@Co3O4/NMCS with similar to 20 wt % Co@Co3O4 achieves a reflection loss of -53.8 dB at 5.7 GHz. The simulated radar cross section demonstrated that the Co@Co3O4/NMCS can efficiently suppress the strong electromagnetic scattering from a metal groove structure, which further reveals its excellent absorbing performance. These periodic porous structures of N-doped mesoporous carbon spheres combined with the magnetic Co@Co3O4 nanoparticles contribute to the excellent microwave-absorbing performance.
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