Heterostructure design of MOFs derived Co_(9)S_(8)/FeCoS_(2)/C composite with efficient microwave absorption and waterproof functions

作     者：Runrun Cheng Yan Wang Xiaochuang Di Zhao Lu Ping Wang Xinming Wu Runrun Cheng;Yan Wang;Xiaochuang Di;Zhao Lu;Ping Wang;Xinming Wu

作者机构：School of Materials and Chemical EngineeringXi’an Technological UniversityXi’an 710021China 

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

年 卷 期：2022年第129卷第34期

页      面：15-26页

核心收录：

学科分类：08[工学] 0806[工学-冶金工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：financially supported from the National Natural Science Foundation of China (Nos. 61701386 and 21975196) the Young Star Project of Science and Technology of Shaanxi Province(No. 2019KJXX-033) the Youth Innovation Team of Shaanxi Universities:Metal corrosion protection and surface engineering technology。 

主　　题：Electromagnetic absorption Metal-organic frameworks(MOFs) Bouquet-like CoFe-MOF Sulfur doping 

摘      要：At present, the problem of electromagnetic wave(EMW) pollution is critical, and the design of highperformance absorbers is of great significance. Based on the synergy between dielectric and magnetic losses, and between multicomponents in heterostructures, the development of light-weight absorbers with a strong absorption capability and multiple scattering is a promising strategy to achieve highperformance absorbers. In this work, CoFe-MOF precursors with a bouquet-like structure were prepared via the hydrothermal method, and Co_(7)Fe_(3)/C and Co_(9)S_(8)/FeCoS_(2)/C composites were obtained through a carbonization and sulfuration treatment during the high-temperature pyrolysis process, respectively. The experimental and theoretical results show that the Co_(9)S_(8)/FeCoS_(2)/C composite has a better EMW absorption performance, and its optimal reflection loss(RL) value is-53.9 d B at a low filler loading of 20 wt.%,which is due to the S doping that enhances the interface polarization relaxation process and improves the impedance matching characteristics. Moreover, the Co_(9)S_(8)/FeCoS_(2)/C composite can be as candidates of high-efficiency absorbers in extreme application environments.