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作 者:Zhiwei Zhang Zhuo Li Lun Xia Ruofeng Wang Yishu Cao Zheng Cheng Yi Huang
出 处:《Nano Research》2023年第1期88-100,共13页纳米研究(英文版)
基 金:We acknowledge the National Key R&D Program of China(No.2020YFA0711500);the National Natural Science Foundation of China(Nos.21875114,51373078,and 51422304);the 111 project(No.B18030).
摘 要:Exploring advanced electromagnetic wave(EMW)absorbers is one of the most feasible ways to solve the increasing electromagnetic pollution in both military and civil fields.In this work,γ-graphyne(γ-GY)is synthesized by a mechanochemical route using CaC2 and hexabromobenzene(PhBr6).Then three-dimensional(3D)reduced graphene oxide/γ-GY(RGO/GY)heterostructures are prepared through facile solvothermal self-assembly and subsequent thermal reduction.The influences of calcination temperature and the content ofγ-GY of the composite on EMW absorption performance are fully investigated.The minimum reflection loss(RL)value of the RGO/GY composite foam is−71.73 dB at 10.48 GHz with the matching thickness of 3.54 mm,and the effective absorption bandwidth(EAB)less than−10 dB is 7.36 GHz.Moreover,excellent terahertz(THz)absorption property is also obtained at 0.2–1.6 THz.The RL of 84.08 dB is acquired,and the EAB covers 100%of the entire measured bandwidth.In addition,the composite is also a promising anticorrosive EMW absorber.This work provides encouraging findings,which are also instructive for the potential advantages of graphyne-based materials as highly efficient EMW absorbers in both gigahertz and terahertz band ranges.
关 键 词:γ-Graphyne MECHANOCHEMICAL graphene oxide electromagnetic wave(EMW)absorption ANTICORROSIVE
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