5 years ago

Microwave Absorption Properties of CoS2 Nanocrystals Embedded into Reduced Graphene Oxide

Microwave Absorption Properties of CoS2 Nanocrystals Embedded into Reduced Graphene Oxide
Can Su, Jianyong Xiang, Bochong Wang, Fusheng Wen, Zhongyuan Liu, Congpu Mu, Can Zhang
CoS2 nanoparticles and CoS2/reduced graphene oxide (CoS2/rGO) nanohybrids were fabricated by a unique single-mode microwave-assisted hydrothermal method. The microwave absorption properties of CoS2/rGO composites with different rGO proportions were investigated. Morphology analysis indicated that the CoS2 nanoparticles were uniformly embedded into rGO without aggregation. The complex permittivity of CoS2/rGO nanohybrids could be artificially tuned with the rGO proportions. For the CoS2/rGO 1:2 composite, the minimum reflection loss (RL) of −56.9 dB was achieved at 10.9 GHz for the thickness of 2.2 mm; meanwhile, the RL exceeding −10 dB were obtained in the frequency range of 9.1–13.2 GHz. Compared with other rGO-based materials, CoS2/rGO composite exhibited superior microwave absorption ability at a rather thin thickness and it has great potential to be used as a high-efficiency and tunable microwave absorber.

Publisher URL: http://dx.doi.org/10.1021/acsami.7b06982

DOI: 10.1021/acsami.7b06982

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