Hierarchical graphene@MXene composite foam modified with flower-shaped FeS for efficient and broadband electromagnetic absorption  

作　　者：Shuangshuang Li Xinwei Tang Xu Zhao Shijie Lu Jiangtao Luo Zheyuan Chai Tiantian Ma Qianqian Lan Piming Ma Weifu Dong Zicheng Wang Tianxi Liu 

机构地区：[1]The Key Laboratory of Synthetic and Biological Colloids,Ministry of Education,School of Chemical and Material Engineering,International Joint Research Laboratory for Nano Energy Composites,Jiangnan University,Wuxi 214122,China

出　　处：《Journal of Materials Science & Technology》2023年第2期238-248,共11页材料科学技术（英文版）

基　　金：supported by the National Natu-ral Science Foundation of China(Nos.52003106,21674019);the Fundamental Research Funds for the Central Universities(Nos.JUSRP12032,2232019A3-03);the China Postdoctoral Science Foun-dation(No.2021M691265),the Ministry of Education of the Peo-ple’s Republic of China(No.6141A0202202);the Postgraduate Research&Practice Innovation Program of Jiangsu Province(Nos.KYCX22_2319,SJCX22_1110).

摘　　要：Developing high-performance broadband microwave absorption material becomes an urgent concern in the field of electromagnetic protection.In this work,an ultralight magnetic composite foam was con-structed by electrostatic self-assembly of MXene on the surface of graphene skeletons,and subsequent hydrothermal anchoring of flower-shaped FeS clusters.Under the synergistic effect of MXene coating in-creasing conductive loss and FeS clusters improving magnetic loss,the rational construction of hierarchi-cal impedance structure in foam can effectively promote the entrance and consumption of more incident electromagnetic waves.The minimum reflection loss(RL min)reaches-47.17 dB at a thickness of 4.78 mm,and the corresponding effective absorption bandwidth(EAB)is up to 6.15 GHz.More importantly,the microwave absorption performance of composite foam can be further optimized by controlling the load-ing of MXene and thermal treatment at a low temperature.The maximum of EAB for GMF-300 can be extended to an unprecedented value of 11.20 GHz(covering 6.10-17.30 GHz).

关 键 词：Graphene MXene Iron sulfide Hierarchical structure Foam Microwave absorption 

分 类 号：TB34[一般工业技术—材料科学与工程]