Journal
CHEMICAL ENGINEERING JOURNAL
Volume 454, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2022.140277
Keywords
MXene; Carboxylated multi -walled carbon nanotubes; ZnO; Schottky barrier; Porous; Magneto -dielectric double loss
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This study demonstrates the optimized design of porous flower-like CZCT composites with strong absorption capability at a thinner thickness. It provides a simple strategy for constructing lightweight and adjustable MXene-based composites.
The design of a hierarchical three-dimensional (3D) structure is beneficial to suppressing the accumulation of MXene flakes and obtaining satisfactory lightweight, efficient, and broadband-absorbing materials. Undoubtedly, the exploration of electromagnetic wave (EMW) absorbing materials with stronger absorption and thinner thickness of multi-component and multi-mechanism synergy is in great demand, but it is still a challenge. In this paper, we report for the first time a well-designed and optimized electrostatic self-assembly anchored Ti3C2Tx nanosheet to prepare porous flower-like Co/ZnO@CMWCNTs/Ti3C2Tx (CZCT) composites. The electromagnetic parameters and EMW absorption properties of carboxylated multi-walled carbon nanotubes (CMWCNTs) and Ti3C2Tx nanosheets can be controlled by adjusting the load of CMWCNTs and Ti3C2Tx nanosheets. Based on the multi-dimensional material collaboration and electromagnetic synergistic strategy, the flower-like CZCT com-posite achieves a significant minimum reflection loss (RLmin) of-46 dB at a thickness of 1.5 mm. The maximum effective absorption bandwidth (EABmax) of 4 GHz is 1.9 mm. This work provides a simple strategy for building MXene-based composites to achieve efficient EMW absorption materials with lightweight and adjustable EAB.
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