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Fabrication of NiCo<sub>2</sub>-Anchored Graphene Nanosheets by Liquid-Phase Exfoliation for Excellent Microwave Absorbers

Ruilong YangState Key Laboratory of Metastable Materials Science and Technology and ‡School of Science, Yanshan University, Qinhuangdao 066004, People’s Republic of ChinaBochong WangState Key Laboratory of Metastable Materials Science and Technology and ‡School of Science, Yanshan University, Qinhuangdao 066004, People’s Republic of ChinaJianyong XiangState Key Laboratory of Metastable Materials Science and Technology and ‡School of Science, Yanshan University, Qinhuangdao 066004, People’s Republic of ChinaCongpu MuState Key Laboratory of Metastable Materials Science and Technology and ‡School of Science, Yanshan University, Qinhuangdao 066004, People’s Republic of ChinaCan ZhangState Key Laboratory of Metastable Materials Science and Technology and ‡School of Science, Yanshan University, Qinhuangdao 066004, People’s Republic of ChinaFusheng WenState Key Laboratory of Metastable Materials Science and Technology and ‡School of Science, Yanshan University, Qinhuangdao 066004, People’s Republic of ChinaCong WangState Key Laboratory of Metastable Materials Science and Technology and ‡School of Science, Yanshan University, Qinhuangdao 066004, People’s Republic of ChinaCan SuState Key Laboratory of Metastable Materials Science and Technology and ‡School of Science, Yanshan University, Qinhuangdao 066004, People’s Republic of ChinaZhongyuan LiuState Key Laboratory of Metastable Materials Science and Technology and ‡School of Science, Yanshan University, Qinhuangdao 066004, People’s Republic of China

2017en

ABI

Annotatsiya

Graphene nanosheets (GNSs) were prepared by an efficient liquid-phase exfoliation method, and then the NiCo2/GNS nanohybrids were fabricated using the single-mode microwave-assisted hydrothermal technique. The NiCo2/GNS composites with different GNS proportions were investigated as microwave absorbers. Morphology investigation suggested that NiCo2 nanocrystals were uniformly anchored on the GNS without aggregation. The electromagnetic parameters of NiCo2/GNS nanohybrids could be artificially adjusted by changing the GNS proportion, which led to an exceptional microwave-absorbing performance. A reflection loss (RL) exceeding −20 dB was obtained in the frequency range of 5.3–16.4 GHz for the absorber thicknesses of 1.2–3.2 mm, while an optimal RL of −30 dB was achieved at 11.7 GHz for a thickness of 1.6 mm. The enhanced microwave-absorbing performance indicated that the NiCo2/10 wt % GNS composite has great potential for use as an excellent microwave absorber.

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Identifikatorlar

DOI: 10.1021/acsami.6b16144

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