Hierarchical porous hollow graphitized carbon@MoS2 with wideband EM dissipation capability

Core-shell materials are promising broadband electromagnetic (EM) absorption materials since the highly component manipulation performance, interfacial effect etc. Herein, a well-defined core-shell shaped structure constructed by 2-dimensional MoS2 nanosheets-coated porous hollow carbon has been successfully designed with controlled pore-sizes of the core, adjustable shell content, and structure. By effectively optimizing the parameters for these factors, the as-prepared hierarchical porous hollow C@MoS2 sample enables an ultra-width EM absorption ability (covering 11.4-18.0 GHz) at a thickness of only 2.0 mm. The detailed contributions of each component and structure on the excellent EM absorption capability have been investigated. These encouraging results indicate that the development of core-shell composites with multiple controllable physical factors is of great significance for the future ultra-wideband electromagnetic absorbers. (C) 2021 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.

Automated summary

Core-shell materials with well-defined structure and optimized parameters show excellent ultra-wideband electromagnetic absorption ability, covering a range of 11.4-18.0 GHz. The development of core-shell composites with controllable physical factors is considered significant for future electromagnetic absorbers.