Journal
COMPOSITES PART B-ENGINEERING
Volume 222, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesb.2021.109067
Keywords
Core@shell structure; Flower-likeFeSe2@MoSe2 nanocomposites; Broad frequency bandwidth; Microwave absorption
Funding
- Fund of Fok Ying Tung Education Foundation
- Guizhou Province Graduate Research Fund [2020-089]
- Major Research Project of innovative Group of Guizhou province [2018-013]
- National Science Foundation of China [11964006, 11774156]
- Foundation of the National Key Project for Basic Research [2012CB932304]
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A high-efficiency flowerlike FeSe2@MoSe2 core@shell nanocomposite was synthesized through a simple in situ hydrothermal reaction, demonstrating optimal reflection loss values and effective frequency bandwidth for electromagnetic wave attenuation. The nanocomposite showed extraordinary absorption capabilities and broad absorption bandwidth with very thin matching thicknesses, making it a desirable candidate for high-performance microwave absorption materials.
To effectively utilize the unique properties of layered transition metal dichalcogenide and the attractive morphology of hierarchical flower for the attenuation of electromagnetic wave, herein, high-efficiency flowerlike core@shell structure FeSe2@MoSe2 nanocomposites were firstly synthesized through a simple in situ hydrothermal reaction on the surfaces of Fe3O4 nanoparticles with the adequate amounts of Mo and Se sources. The obtained results indicated that the designed flower-like core@shell structure FeSe2@MoSe2 nanocomposites with the filler loadings of 30 wt% and 40 wt% presented the optimal reflection loss (RLopt) value of -59.87 dB at 11 GHz with a matching thickness of 3.10 mm and -60.53 dB at 13.52 GHz with a matching thickness of 2.47 mm. And their corresponding effective frequency bandwidth (fb) values were up to 10.0 GHz with a thickness of 3.66 mm and 6.00 GHz with a thickness of 2.12 mm, respectively. It was worth pointing out that the as-prepared flower-like FeSe2@MoSe2 nanocomposite with filler loading of 30 wt% could simultaneously present very extraordinary electromagnetic wave absorption capabilities and broad absorption bandwidth with the very thin matching thicknesses, which was desirable for high-efficient microwave absorbers. Therefore, a simple and effective strategy was proposed to produce flower-like core@shell structure MoSe2-based nanocomposites, which could be applied as the very desirable candidates for high-performance microwave absorption materials.
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