title: Fabrication of NiCo2-Anchored Graphene Nanosheets by Liquid-Phase Exfoliation for Excellent Microwave Absorbers.
abstract: 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 NiCo2nanocrystals 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.
authors.affiliation: State Key Laboratory of Metastable Materials Science and Technology and ‡School of Science, Yanshan University , Qinhuangdao 066004, People's Republic of China.
authors.forename: Ruilong
authors.initials: R
authors.lastname: Yang
authors.affiliation: State Key Laboratory of Metastable Materials Science and Technology and ‡School of Science, Yanshan University , Qinhuangdao 066004, People's Republic of China.
authors.forename: Bochong
authors.initials: B
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Metastable Materials Science and Technology and ‡School of Science, Yanshan University , Qinhuangdao 066004, People's Republic of China.
authors.forename: Jianyong
authors.initials: J
authors.lastname: Xiang
authors.affiliation: State Key Laboratory of Metastable Materials Science and Technology and ‡School of Science, Yanshan University , Qinhuangdao 066004, People's Republic of China.
authors.forename: Congpu
authors.initials: C
authors.lastname: Mu
authors.affiliation: State Key Laboratory of Metastable Materials Science and Technology and ‡School of Science, Yanshan University , Qinhuangdao 066004, People's Republic of China.
authors.forename: Can
authors.initials: C
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Metastable Materials Science and Technology and ‡School of Science, Yanshan University , Qinhuangdao 066004, People's Republic of China.
authors.forename: Fusheng
authors.initials: F
authors.lastname: Wen
authors.affiliation: State Key Laboratory of Metastable Materials Science and Technology and ‡School of Science, Yanshan University , Qinhuangdao 066004, People's Republic of China.
authors.forename: Cong
authors.initials: C
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Metastable Materials Science and Technology and ‡School of Science, Yanshan University , Qinhuangdao 066004, People's Republic of China.
authors.forename: Can
authors.initials: C
authors.lastname: Su
authors.affiliation: State Key Laboratory of Metastable Materials Science and Technology and ‡School of Science, Yanshan University , Qinhuangdao 066004, People's Republic of China.
authors.forename: Zhongyuan
authors.initials: Z
authors.lastname: Liu
keywords: NiCo2; graphene nanosheets; liquid phase exfoliation; microwave absorption; permittivity; quarter-wavelength matching model; reflection loss; single-mode microwave-assisted hydrothermal