Super broadband absorbing hierarchical CoFe alloy/porous carbon@carbon nanotubes nanocomposites derived from metal-organic frameworks
作者机构：School of Civil EngineeringQingdao University of TechnologyQingdao 266033China Postdoctoral WorkstationGuangdong Dongpeng Holding Company LimitedGuangdong 528031China Cooperative Innovation Center of Engineering Construction and Safety in Shandong Blue Economic ZoneQingdao University of TechnologyQingdao 266033China National Key Laboratory of Science and Technology for National Defence on Advanced Composites in special EnvironmentsHarbin Institute of TechnologyHarbin 150080China
出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)
年 卷 期：2022年第118卷第23期
页 面：218-228页
核心收录：
学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学]
基 金：financially supported by the National Natural Science Foundation of China (NSFC,Nos.51978354,52002201,52008223) the major program of Shandong province (No.GG201809170147) Outstanding Youth Foundation of Shandong province (No.ZR2020YQ43) Qingchuang Technology Project (No.2020KJG002) Natural Science Foundation of Shandong Province(No.ZR2020QE055) the fellowship support received from the Tai Shan Scholar Programme
主 题：Electromagnetic wave absorption CoFe alloy/porous carbon@carbon nanotubes nanocomposites Broadband absorbing Metal-organic frameworks
摘 要：The exploitation of electromagnetic wave absorption(EMA) materials has attracted ever-increasing attention,not only because electromagnetic wave(EMW) originated from overuse of electronic products has threatened human health seriously,but also because EMA materials can effectively protect radar stealth from being ***,it is still a challenge to obtain broadband and efficient EMA materials to satisfy practical *** this work,we developed a series of hierarchical CoFe alloy/porous carbon@carbon nanotubes(CoFe/PC@CNTs) nanocomposites through revising the proportion of Fe^(2+) in the metal-organic frameworks(MOFs)(CoFe-ZIF) precursor and one-step simple pyrolysis *** cross deposition between CoFe alloy,carbon nanotubes(CNTs),and porous carbon(PC) formed a double conductive network,favoring for achieving excellent EMA ***,when the filler mass ratio is only 10 wt%,the optimized CoFe/PC@CNTs nanocomposites display the best EMA capability,whose minimum reflection loss(RL_(min)) value is-68.94 dB at 13.69 GHz and the effective absorption band(EAB,-10 dB) reaches up 9.14 GHz with a matching thickness of 2.63 *** addition,the largest EAB can achieve up to 11 GHz(3.35-14.35 GHz) during all matching *** splendid EMA performance benefits the favorable dielectric loss provided by the double conductive network,the good magnetic loss benefited from the evenly distributed CoFe alloy,the excellent impedance matching,rich transmission paths,and multiple ***,such EMA materials with super broadband absorbing provide desirable candidates for lightweight and high-efficient microwave absorbers.
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