Customization of FeNi alloy nanosheet arrays inserted with biomass-derived carbon templates for boosted electromagnetic wave absorption  

作　　者：Xuanqi Yang Honghan Wang Jing Chen Qingda An Zuoyi Xiao Jingai Hao Shangru Zhai Junye Sheng 

机构地区：[1]Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials,Liaoning Collaborative Innovation Center for Lignocellulosic Biorefinery,College of Light Industry and Chemical Engineering,Dalian Polytechnic University,Dalian 116034,China [2]Qingdao Medical College,Qingdao University,Qingdao 266071,China

出　　处：《International Journal of Minerals,Metallurgy and Materials》2024年第4期812-824,共13页矿物冶金与材料学报（英文版）

基　　金：financial support from the National Natural Science Foundation of China(Nos.21776026,22075034,and 22178037);the Liaoning Revitalization Talents Program,China(Nos.XLYC1902037 and XLYC2002114);the Natural Science Foundation of Liaoning Province of China(No.2021-MS-303)。

摘　　要：Electromagnetic wave(EMW)-absorbing materials have considerable capacity in the military field and the prevention of EMW radiation from harming human health.However,obtaining lightweight,high-performance,and broadband EMW-absorbing material remains an overwhelming challenge.Creating dielectric/magnetic composites with customized structures is a strategy with great promise for the development of high-performance EMW-absorbing materials.Using layered double hydroxides as the precursors of bimetallic alloys and combining them with porous biomass-derived carbon materials is a potential way for constructing multi-interface heterostructures as efficient EMW-absorbing materials because they have synergistic losses,low costs,abundant resources,and light weights.Here,FeNi alloy nanosheet array/Lycopodium spore-derived carbon(FeNi/LSC)was prepared through a simple hydrothermal and carbonization method.FeNi/LSC presents ideal EMW-absorbing performance by benefiting from the FeNi alloy nanosheet array,sponge-like structure,capability for impedance matching,and improved dielectric/magnetic losses.As expected,FeNi/LSC exhibited the minimum reflection loss of-58.3 dB at 1.5 mm with 20wt%filler content and a widely effective absorption bandwidth of 4.92 GHz.FeNi/LSC composites with effective EMW-absorbing performance provide new insights into the customization of biomass-derived composites as high-performance and lightweight broadband EMW-absorbing materials.

关 键 词：spore-derived carbon FeNi alloy nanosheet array multi-interface heterostructures synergistic effect efficient electromagnet-ic wave absorption 

分 类 号：TB34[一般工业技术—材料科学与工程]