Metal ions-assisted construction of SiO2/MXene/Fe3O4 aerogel as multifunctional electromagnetic wave absorbing material
Metal ions-assisted construction of SiO2/MXene/Fe3O4 aerogel as multifunctional electromagnetic wave absorbing material
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DOI：
10.1016/j.carbon.2023.118266
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发表时间：
2023-06
期刊：
影响因子：
10.9
通讯作者：
Junzhe He;Jinjin Li;Jiulin Zhang;Peng Yi;Xin Sun;Guanyu Han;Xufeng Li;Ruibing Zhang;
中科院分区：
文献类型：
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作者：
Junzhe He;Jinjin Li;Jiulin Zhang;Peng Yi;Xin Sun;Guanyu Han;Xufeng Li;Ruibing Zhang;
先进的电磁波吸波材料正朝着轻量化、薄厚度、宽吸收带宽和多功能的方向发展。MXene作为一种新型的二维材料受到了广泛的关注，但其高导电性导致的阻抗失配问题需要解决。本文采用金属离子辅助交联法制备了Fe3O4/MXene复合气凝胶，无需添加交联剂。在气凝胶上进一步喷涂一层疏水气相二氧化硅。得益于磁电协同效应和多孔结构，SiO2/MXene/ fe3o4气凝胶具有优异的电磁波吸收性能，在极薄厚度为1 mm的情况下，其吸收带宽高达8.8 GHz。混合气凝胶还具有超疏水性和隔热性能，这有利于提高对恶劣环境的抵抗力，从而使吸收剂具有较长的使用寿命。
Advanced electromagnetic wave absorbing materials are developing towards the directions of lightweight, thin thickness, broad absorption bandwidth, and multifunction. MXene, as a new type of two-dimensional material, has received widespread attention, but it is necessary to address the impedance mismatch problem caused by its high conductivity. In this work, Fe3O4/MXene composite aerogel is prepared by metal ion-assisted crosslinking method without adding additional crosslinking agents. And a layer of hydrophobic fumed silica is further sprayed on the aerogel. Benefiting from the magneto-electric synergistic effect and the porous structure, SiO2/MXene/Fe3O4aerogels shows excellent electromagnetic wave absorption performances, achieving a quite broad absorption bandwidth up to 8.8 GHz at an extremely thin thickness of 1 mm. The hybrid aerogel also shows superhydrophobic and thermal insulation properties, which are conducive to improving the resistance to harsh environments and thus endow the absorbers with a long service time.