Constructing flower-like core@shell MoSe2-based nanocomposites as a novel and high-efficient microwave absorber. (1st October 2021)

• Record Type: Journal Article
• Authors: Zhang, Jingjing; Li, Zihan; Qi, Xiaosi; Gong, Xiu; Xie, Ren; Deng, Chaoyong; Zhong, Wei; Du, Youwei
• Is Part Of: Composites. Number 222(2021)
• Publication Date: 2021-10-01
• Subjects: Core@shell structure -- Flower-like FeSe2@MoSe2 nanocomposites -- Broad frequency bandwidth -- Microwave absorption; Composite materials -- Periodicals; Materials science -- Periodicals; Composite materials; Periodicals; Electronic journals; 620.118
• DOI: 10.1016/j.compositesb.2021.109067
• Languages: English
• ISSNs: 1359-8368

Abstract

Abstract: 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 flower-like core@shell structure FeSe2 @MoSe2 nanocomposites were firstly synthesized through a simple in situ hydrothermal reaction on the surfaces of Fe3 O4 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 ( f b ) 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. Graphical abstract: Image 1 Highlights: Flower-like FeSe2 @MoSe2 nanocomposites as MAs were not reported previously. Core@shell structure FeSe2 @MoSe2 nanocomposites were synthesized through a simple hydrothermal reaction. Flower-like FeSe2 @MoSe2 displayed very extraordinary comprehensive microwave absorption properties.