Ti3C2 MXenes with Modified Surface for High-Performance Electromagnetic Absorption and Shielding in the X-Band

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• 作者：Meikang Han ; Xiaowei Yin ; Heng Wu ; Zexin Hou ; Changqing Song ; Xinliang Li ; Litong Zhang ; Laifei Cheng
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：August 17, 2016
• 年：2016
• 卷：8
• 期：32
• 页码：21011-21019
• 全文大小：612K
• 年卷期：0
• ISSN：1944-8252

文摘

Electromagnetic (EM) absorbing and shielding composites with tunable absorbing behaviors based on Ti₃C₂ MXenes are fabricated via HF etching and annealing treatment. Localized sandwich structure without sacrificing the original layered morphology is realized, which is responsible for the enhancement of EM absorbing capability in the X-band. The composite with 50 wt % annealed MXenes exhibits a minimum reflection loss of −48.4 dB at 11.6 GHz, because of the formation of TiO₂ nanocrystals and amorphous carbon. Moreover, superior shielding effectiveness with high absorption effectiveness is achieved. The total and absorbing shielding effectiveness of Ti₃C₂ MXenes in a wax matrix with a thickness of only 1 mm reach values of 76.1 and 67.3 dB, while those of annealed Ti₃C₂ MXenes/wax composites are 32 and 24.2 dB, respectively. Considering the promising performance of Ti₃C₂ MXenes with the modified surface, this work is expected to open the door for the expanded applications of MXenes family in EM absorbing and shielding fields.