Core-shell Ni_(3)Sn_(2)@C particles anchore d on 3D N-dope d porous carbon skeleton for modulated electromagnetic wave absorption  

作　　者：Hongxia Zhang Kaige Sun Kangkang Sun Lei Chen Guanglei Wu 

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,266071 Qingdao,China [2]State Key Laboratory of Tribology,Tsinghua University,100084 Beijing,China [3]School of Chemical Engineering,The University of Queensland,4072 St Lucia,QLD,Australia

出　　处：《Journal of Materials Science & Technology》2023年第27期242-252,共11页材料科学技术（英文版）

基　　金：financially supported by the Natural Science Foundation of Shandong Province(No.ZR2019YQ24);the Taishan 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).

摘　　要：Synthesizing multi-component composites via a straightforward,reliable,and scalable approach has been challenging.Herein,a three-dimensional nitrogen-doped porous carbon decorated with core-shell Ni_(3)Sn_(2)@carbon particles(3D N-PC/Ni_(3)Sn_(2)@C)was customized through a simple salt-template pyrolysis approach.The formed Ni_(3)Sn_(2) particles are perfectly surrounded by crystalline carbon layers and em-bedded in 3D carbon walls during pyrolysis.The dual protection of crystalline carbon layers and porous carbon walls guarantees the electrical conductivity and stability of Ni_(3)Sn_(2).The intriguing 3D and core-shell structure coupled with the introduction of multiple components empowers the composite with rich heterogeneous interface and conductive network,and contributes to the lightweight,corrosion resistance,oxidation resistance,and superior stability of electromagnetic(EM)wave absorbers.The N-PC/Ni_(3)Sn_(2)@C possesses the minimum reflection loss(RL min)of-54.01 dB and wide effective absorption bandwidth(EAB)of 7.36 GHz under a low filler content of less than 10%.The concept in the work proposes a facile,eco-friendly,and scalable pathway for the synthesis of other heterogeneous structures of EM wave ab-sorbers.

关 键 词：Nitrogen doping Ni_(3)Sn_(2) 3D conductivity network Microwave absorption Ultra-low filler loading 

分 类 号：TQ174.758.11[化学工程—陶瓷工业]