Coral-like carbon-based composite derived from layered structure Co-MOF-71 with outstanding impedance matching and tunable microwave absorption performance

作     者：Panpan Zhou Meng Wang Zhi Song Yongkang Guan Lixi Wang Qitu Zhang Panpan Zhou;Meng Wang;Zhi Song;Yongkang Guan;Lixi Wang;Qitu Zhang

作者机构：College of Materials Science and EngineeringNanjing Tech UniversityNanjing 211816China Jiangsu Collaborative Innovation Center for Advanced Inorganic Function CompositesNanjing 211816China 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2022年第108卷第13期

页      面：10-17页

核心收录：

学科分类：0806[工学-冶金工程] 0817[工学-化学工程与技术] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0802[工学-机械工程] 0702[理学-物理学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：the financial support from the Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD) 

主　　题：Co-MOF-71 Coral-like structure Ku band Magnetoelectric synergy Electromagnetic absorption 

摘      要：Metal-organic frameworks(MOFs)are considered as a novel type of microwave absorption(MA)material owing to the sufficient pore structure,diverse configurations,and easy-to-control magnetic ***,their evolution is limited by the imperfect impedance matching conditions caused by the undesirable ***,two types of novel porous coral-like carbon/Co_(3)O_(4)and carbon/Co composites have been effectively fabricated for the first time by a facile heat treatment process of precursor *** graphitization degree,magnetic property and MA ability of the product can be effortlessly tuned by altering the heat treatment temperature of ***,S500(Co-MOF-71 calcined at 500℃)composite displays strong and multi-frequency absorption performance,whose minimum reflection loss(RL)value achieves-36.4 d B with an absorbing thickness of 3.0 mm and attains an effective absorbing bandwidth(RL≤-10 dB)of 5.76 GHz(almost covers whole Ku band)at a thinner coating thickness of 2.5 *** superb MA ability has roots in the coral-like structure derived from the layer Co-MOF-71,sufficient electromagnetic *** work ameliorates the MA ability of MOFs through a special nanostructural design,which provides a fresh way for the preparation of novel MA materials.