Journal
NANOTECHNOLOGY
Volume 31, Issue 8, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1361-6528/ab53c4
Keywords
flower-like Fe3S4 microspheres; quasi-sphere Fe3S4-RGO; electromagnetic wave absorption; reflection loss
Funding
- Natural Science Foundation of China [50972060]
- Environmental Protection Scientific Research Project of Jiangsu Province [2016056]
- Natural Science Foundation of Jiangsu Province [BK20180495, BK20180698]
- National Key R&D Program of China [2016YFB0302800]
- Qing Lan Project
- Weapon Research Support Fund [62201070804]
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3D flower-like Fe3S4 microspheres and quasi-sphere Fe3S4-RGO hybrid-architectures were successfully fabricated by a facile template-free hydrothermal method. The results of morphology revealed that the single Fe3S4 was composed of many nanoflakes and the Fe3S4-RGO composites mainly distributed together into a ball up and down the RGO sheet. The electromagnetic parameters of the single Fe3S4 and Fe3S4-RGO composites could be controlled by adjusting different filler loading and the addition of different GO to achieve impedance matching. Both the single Fe3S4 and Fe3S4-RGO composites exhibited an excellent EM absorption ability. The minimum reflection loss (RL) of the single Fe3S4 with 50% filler loading could achieve -66.87 dB at 10.57 GHz for the thickness of 2.2 mm, and the absorption bandwidth (RL < -10 dB) could reach 3.49 GHz. For the Fe3S4-RGO composites, the minimum RL of FSR-1 could be -40.25 dB at 9.67 GHz with the thickness of 2.0 mm. In addition, the effective absorption bandwidth of FSR-2 could reach 3.85 GHz at only 1.45 mm and the minimum RL was -29.25 dB at 14.24 GHz. Consequently, the single Fe3S4 and Fe3S4-RGO composites are promising materials as a high performance and adjustable EM wave absorber.
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