3D porous coral-like Co 1.29 Ni 1.71 O 4 microspheres embedded into reduced graphene oxide aerogels with lightweight and broadband microwave absorption

In this work, three-dimensional (3D) porous coral-like Co Ni O microspheres were successfully combined with reduced graphene oxide (rGO) to form Co Ni O /rGO aerogels as an efficient microwave absorber by a facile calcination and hydrothermal method. The elemental composition, microstructure, and mo...

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Bibliographic Details
Published in:Journal of colloid and interface science 2022-03, Vol.609, p.12
Main Authors: Qiu, Junfeng, Cao, Haopeng, Liao, Jun, Du, Rongxiao, Dou, Kai, Tsidaeva, Natalia, Wang, Wei
Format: Article
Language:English
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Summary:In this work, three-dimensional (3D) porous coral-like Co Ni O microspheres were successfully combined with reduced graphene oxide (rGO) to form Co Ni O /rGO aerogels as an efficient microwave absorber by a facile calcination and hydrothermal method. The elemental composition, microstructure, and morphology of the as-synthesized composites were characterized, and the electromagnetic wave absorption performance were analyzed in the frequency range of 2.0-18.0 GHz. The results show that adjusting the mass ratio of Co Ni O microspheres and rGO in the composites can effectively tune the electromagnetic parameters, which in turn improves their microwave absorption performance. Here, the minimum reflection loss (RL ) of the Co Ni O /rGO aerogels is -51.76 dB with an effective absorption bandwidth (RL 
ISSN:1095-7103
DOI:10.1016/j.jcis.2021.11.176