期刊
ACS APPLIED MATERIALS & INTERFACES
卷 8, 期 32, 页码 21011-21019出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b06455
关键词
mxenes; surface modification; dielectric; microwave absorption; electromagnetic shielding
资金
- National Natural Science Foundation of China [51332004, 51372204]
- Innovation Foundation for Doctor Dissertation of Northwestern Polytechnical University [CX201604]
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 SO 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 min 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.
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