Magnetic Fe3S4 LTMCs micro-flowers@ wax gourd aerogel-derived carbon hybrids as efficient and sustainable electromagnetic absorber
| Autor: | Wei Lu, Xiaojie Zhu, Yanyan Dong, Baiwen Deng, Chuang Huang, Zhicheng Liu, Zhong Shi, Fei Pan |
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| Rok vydání: | 2021 |
| Předmět: |
Wax
Materials science Reflection loss chemistry.chemical_element Aerogel 02 engineering and technology General Chemistry Dielectric 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences chemistry visual_art visual_art.visual_art_medium General Materials Science Lamellar structure Composite material 0210 nano-technology Absorption (electromagnetic radiation) Carbon Electrical impedance |
| Zdroj: | Carbon. 179:554-565 |
| ISSN: | 0008-6223 |
| Popis: | As a dielectric loss-type absorber, lamellar transitional metal chalcogenides (LTMCs) become more and more popular in the electromagnetic (EM) absorbing field due to their unique two-dimensional sheet structure. However, it remains challenging for metallic sulfides to obtain magnetic loss, further promoting loss mechanism. Herein, magnetic Fe3S4 LTMCs micro-flowers@ wax gourd aerogel-derived carbon composites are fabricated through a facile pyrolysis process and subsequent hydrothermal method. Compared to a pure biomass carbon or Fe3S4, Fe3S4@C composites exhibited an optimized and adjustable EM characteristic, which can be put down to the synergistic effects between the dielectric/magnetic loss and the impedance match. The sample shows superior EM absorption properties with a minimum reflection loss (RL) of −58.85 dB at 3.1 mm and a broad effective bandwidth (EBW) of 5.40 GHz at the matching thickness of 2.0 mm with a filling ratio of 20 wt%. In addition, the radar cross section (RCS) simulation confirms that the material can effectively suppress EMW (−8.51 dB m2 at zero degree) in practical applications. Therefore, it is believed that the as-prepared Fe3S4@C hybrids can be one of the prospective candidates as high-efficiency EMW absorbers. |
| Databáze: | OpenAIRE |
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