4.7 Article

Novel ZnFe2O4@MnO2@MXene composites with ultrathin thickness and excellent electromagnetic absorption performance

期刊

COMPOSITES COMMUNICATIONS
卷 35, 期 -, 页码 -

出版社

ELSEVIER SCI LTD
DOI: 10.1016/j.coco.2022.101316

关键词

MXene; Core -shell structure; Composite; Electromagnetic wave absorption

资金

  1. National Natural Science Foundation of China [51103048]
  2. Guangdong Natural Science Founda-tion Project [2018A0303130023]
  3. Zhongshan Key Innovational Projects [2019AG022, 2020AG022]

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A flower-like ZnFe2O4@MnO2@MXene composite with core-shell structures was prepared by a hydrothermal method and electrostatic self-assembly. The composite showed excellent electromagnetic wave absorption performance with a minimum reflection loss of -50.4 dB and an effective absorption bandwidth of 4.7 GHz.
A flower-like ZnFe2O4@MnO2 composite with core-shell structures was prepared by a hydrothermal method. MXene nanosheets were fabricated by etching titanium aluminium carbide (Ti3AlC2) and further ultrasonic exfoliation. A ZnFe2O4@MnO2@MXene composite was synthesized by electrostatic self-assembly with negatively charged MXene nanosheets and positively charged ZnFe2O4@MnO2 composite. MXene nanosheets, having a large specific surface area and high electrical conductivity, can provide more conductive pathways. The incor-poration of ZnFe(2)O(4 )and MnO2 contributes to enhanced interfacial polarization and impedance matching. The ZnFe2O4@MnO2@MXene composite shows better electromagnetic wave absorption (EMA) performance than ZnFe(2)O(4 )and the ZnFe2O4@MnO2 composite. The minimum reflection loss (RLmin) of the ZnFe2O4@MnO2@M-Xene composite reaches-50.4 dB at a frequency of 15.3 GHz with a thickness of 1.40 mm, while the effective absorption bandwidth (EAB) reaches 4.7 GHz (13.3-18.0 GHz). The EMA mechanism of the composite was revealed. This study can provide a strategy for the structural designation of high-performance EMA materials.

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