Much enhanced electromagnetic wave absorbing properties from the synergistic effect of graphene/γ-graphyne heterostructure in both gigahertz and terahertz band ranges  被引量:2

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作  者:Zhiwei Zhang Zhuo Li Lun Xia Ruofeng Wang Yishu Cao Zheng Cheng Yi Huang 

机构地区:[1]National Institute for Advanced Materials,Tianjin Key Laboratory of Metal and Molecule Based Material Chemistry,Key Laboratory of Functional Polymer Materials,Collaborative Innovation Center of Chemical Science and Engineering(Tianjin),School of Materials Science and Engineering,Nankai University,Tianjin 300350,China

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 

分 类 号:TQ127.11[化学工程—无机化工]

 

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