Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5358393 | Applied Surface Science | 2014 | 7 Pages |
Abstract
Urchinlike Ni nanoparticles/reduced graphene oxide (u-Ni/RGO) composites were successfully synthesized through a facile and effective one-pot solvothermal method to reduce graphene oxide (GO) and nickel salt with hydrazine hydrate in ethylene glycol (EG). The TEM and SEM images display that plenty of urchinlike Ni nanoparticles are deposited on the reduced graphene oxide (RGO) nanosheets. The magnetic hysteresis measurement reveals the ferromagnetic behavior of the composites at room temperature. The resulting electromagnetic (EM) absorption properties show that the maximum reflection loss of u-Ni/RGO composites is up to â32.1Â dB at 13.8Â GHz and the absorption bandwidth with the reflection loss less than â10Â dB is 4.5Â GHz (from 10.9 to 15.4Â GHz) with the thickness of 2Â mm. Interestingly, the reflection loss curve exhibits two obvious peaks corresponded to the reflection loss with the thickness of 4.0-5.0Â mm. The remarkable EM absorption properties of u-Ni/RGO composites can be attributed to the multiple absorbing mechanisms. It is believed that such composites could serve as an attractive candidate for EM absorber.
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Authors
Gongzong Liu, Wei Jiang, Danping Sun, Yanping Wang, Fengsheng Li,