Regulating microstructure and composition by carbonizing in-situ grown metal-organic frameworks on cotton fabrics for boosting electromagnetic wave absorption  

作　　者：Jie Jin Hongsen Long Hu Liu Yan Guo Tiantian Bai Ben Bin Xu Mohammed A.Amin Hua Qiu Mohamed H.Helal Chuntai Liu Changyu Shen Zeinhom M.El-Bahy Zhanhu Guo 

机构地区：[1]State Key Laboratory of Structural Analysis,Optimization and CAE Software for Industrial Equipment,National Engineering Research Center for Advanced Polymer Processing Technology,Zhengzhou University,Zhengzhou 450002,China [2]China State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410000,China [3]School of Electronic Engineering,North China University of Water Resources and Electric Power,Zhengzhou 450046,China [4]Complex Conditions of High-end Tire Technology Innovation Center,Shuguang Rubber Industry Research&Design Institute Co.,Ltd,Guilin 541004,China [5]Integrated Composites Lab,Department of Mechanical and Civil Engineering,Northumbria University,Newcastle Upon Tyne,NE18ST,UK [6]Department of Chemistry,College of Science,Taif University,P.O.Box 11099,Taif 21944,Saudi Arabia [7]Shaanxi Key Laboratory of Macromolecular Science and Technology,School of Chemistry and Chemical Engineering,Northwestern Polytechnical University,Xi’an 710072,China [8]Department of Chemistry,Faculty of Arts and Science,Northern Border University,Rafha 73213,Saudi Arabia [9]Department of Chemistry,Faculty of Science,Al-Azhar University,Nasr City 11884,Cairo,Egypt

出　　处：《Nano Research》2024年第8期7290-7300,共11页纳米研究（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.52373093 and 12072325);Outstanding Youth Fund of Henan Province(No.242300421062);the National Key R&D Program of China(No.2019YFA0706802);the 111 project(No.D18023);The authors also extend their appreciation to the Deanship of Scientific Research at Northern Border University,Arar,KSA for funding this research“work through the project number‘NBU-FFR-2024-540-03’”.

摘　　要：High-temperature carbonized metal-organic frameworks(MOFs)derivatives have demonstrated their superiority for promising electromagnetic wave(EMW)absorbers,but they still suffer from limited EMW absorption capacity and narrow bandwidth.Considering the advantage of microstructure and chemical composition regulation for the design of EMW absorber,hierarchical heterostructured MoS_(2)/CoS_(2)-Co_(3)O_(4)@cabonized cotton fabric(CF)(MCC@CCF)is prepared by growing ZIF-67 MOFs onto CF surface,chemical etching,and carbonization.Aside from the dual loss mechanism of magnetic-dielectric multicomponent carbonized MOFs,chemical etching and carbonization process can effectively introduce abundant micro-gap structure that can result in better impedance matching and stronger absorption capacity via internal reflection,doped heteroatoms(Mo,N,S)to supply additional dipolar polarization loss,and numerous heterointerfaces among MoS_(2),CoS_(2),Co_(3)O_(4),and CCF that produce promoted conduction loss and interfacial polarization loss.Thus,a minimal reflection loss of−52.87 dB and a broadest effective absorption bandwidth of 6.88 GHz were achieved via tunning the sample thickness and filler loading,showing excellent EMW absorption performances.This research is of great value for guiding the research on MOFs derivatives based EMW absorbing materials.

关 键 词：metal-organic frameworks hierarchical structure chemical etching SULFURIZATION electromagnetic wave absorption 

分 类 号：O64[理学—物理化学]