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Construction of NiCeO_(x) nanosheets-skeleton cross-linked by carbon nanotubes networks for efficient electromagnetic wave absorption

查看全文 作　　者：Xinmeng [1]Huang;Xuehua [1]Liu;Yan [1]Zhang;Jixi [1]Zhou;Guanglei [1]Wu;Zirui [1,2]Jia 高影响力作者 机构地区：[1]Institute of Materials for Energy and Environment,State Key Laboratory of Bio-fibers and Eco-textiles,College of Materials Science and Engineering,Qingdao University,Qingdao 266071,China;[2]College of Chemistry and Chemical Engineering,Qingdao University,Qingdao 266071,China高影响力机构 出　　处：《Journal of Materials Science & Technology》索引2023年第16期,共10页高影响力期刊 基　　金：supported by the Natural Science Foundation of Shandong Province(no.ZR2019YQ24);the Tais han Scholars and Young Experts Program of Shandong Province(no.tsqn202103057);the Qingchuang Talents Induction Program of Shandong Higher Education Institution(Research and Innovation Team of Structural-Functional Polymer Composites);the Special Financial of Shandong Province(Structural Design of High-efficiency Electromagnetic Wave-absorbing Composite Materials and Construction of Shandong Provincial Talent Teams). 摘　　要：In this work,two-dimensional NiCeOx nanosheet-modified carbon nanotubes(CNTs)composites were prepared by a hydrothermal method.NiCeOx with different morphologies can be formed by adjusting the addition ratio of nickel salt and cerium salt,and the introduction of CNTs in the subsequent synthesis process can effectively prevent the aggregation of NiCeOx nanosheets.Microstructural studies show that hexagonal NiCeOx nanosheets with a size of 100 nm are uniformly intertwined with CNTs.When applied to the attenuation of electromagnetic waves,NiCeOx/CNTs composites exhibit better electromagnetic wave(EMW)absorption performance than pure CNTs and NiCeOx nanosheets due to improved impedance matching and multiple polarization relaxation.At the matching thickness of 1.9 mm,the composite exhibits a minimum reflection loss(RL_(min))of–53.2 dB and an effective absorption bandwidth(RL<–10 dB)of 5.04 GHz with a thickness of 2.3 mm.These results indicate that the as-prepared NiCeOx/CNTs composites have excellent EMW absorption performance and are expected to be a candidate material for EMW absorption. 关 键 词：NiCeOx nanosheets Carbon nanotubes Dipole polarization Impedance matching Electromagnetic wave absorption
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