文献类型：期刊文献

英文题名：A water-induced self-assembly approach to 3D hierarchical magnetic MXene networks for enhanced microwave absorption

作者：Xu, Jian[1];Ma, Wenjun[1];He, Peng[1];Zhou, Yukang[1];Liu, Xiaoyun[1];Chen, Yi[2];Zuo, Peiyuan[1];Zhuang, Qixin[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Specially Funct Polymer Mat & Related Tech, Minist Educ, Shanghai 200237, Peoples R China;[2]Shanghai Spaceflight Precis Machinery Inst, Shanghai 201108, Peoples R China

年份：2022

卷号：11

期号：1

起止页码：330

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY A

收录：;EI(收录号：20225213303360);WOS:【SCI-EXPANDED(收录号:WOS:000893838200001)】；

基金：This work was supported by the National Natural Science Foundation of China (52073091 and 2171086), Shanghai Pujiang Program (22PJ1402500), Natural Science Foundation of Shanghai (20ZR1414600) and Fundamental Research Funds for the Central Universities (JKD01221701).

语种：英文

外文关键词：Dielectric devices - Self assembly - Water absorption

摘要：Three-dimensional (3D) network structures assembled from two-dimensional (2D) MXene nanomaterials hold enormous potential for microwave absorption (MA) due to strong dielectric loss ability. However, the uncontrollable oversized conductive paths caused by self-stacking issues and the natural lack of magnetic loss hinder the further MA application of the assembled 3D MXene. Herein, we report a facile water-induced self-assembly method to develop a series of 3D hierarchical magnetic nanocrystal@C@MXene hybrids with tunable network structures. The design of the hierarchical structure can isolate each electromagnetic component, thereby ensuring the efficient synergy of the high-density ultrafine magnetic components and high-loss dielectric components. The resulting massive heterointerfaces greatly enhance the interface polarization and reinforce the dielectric loss capability. Moreover, through control over the MXene load, the size of 3D networks can be precisely regulated to adjust the impedance matching. According to experimental and finite element simulation, all the 3D hierarchical magnetic hybrids were found to possess impressive MA properties. Specifically, ZnFe2O4@C@MXene exhibits a minimum reflection loss value of -62.59 dB over an effective absorption bandwidth of 4.42 GHz at a thickness of only 1.33 mm. This work provides a flexible route for constructing 3D hierarchical network materials to realize highly efficient MA performance with thin thickness.