在具有基面纳米级孔的还原氧化石墨烯纳米片上，通过碳封装的 Fe-Co 颗粒实现增强的微波吸收。
Enhanced microwave-absorption with carbon-encapsulated Fe-Co particles on reduced graphene oxide nanosheets with nanoscale-holes in the basal plane.
机构信息
Research & Development Institute in Shenzhen, Northwestern Polytechnical University, Xi'an 710072, PR China; The MOE Key Laboratory of Material Physics and Chemistry under Extrodinary Conditions, Ministry of Education, School of Science, Northwestern Polytechnical University, Xi'an 710072, PR China.
Research & Development Institute in Shenzhen, Northwestern Polytechnical University, Xi'an 710072, PR China; The MOE Key Laboratory of Material Physics and Chemistry under Extrodinary Conditions, Ministry of Education, School of Science, Northwestern Polytechnical University, Xi'an 710072, PR China.
出版信息
J Colloid Interface Sci. 2019 May 15;544:188-197. doi: 10.1016/j.jcis.2019.02.035. Epub 2019 Feb 10.
In this study, an Fe-Co alloy is coated with carbon and decorated on a holey reduced graphene oxide nanosheet (FeCo@C/HRGO) composite. The structure is synthesized using liquid-phase reduction and hydrothermal processes followed by high-temperature calcination. The FeCo@C/HRGO composite is identified and characterized using XRD, XPS, Raman spectroscopy, TEM, and SEM. This novel composite exhibits excellent electromagnetic-wave absorption properties. The maximum reflection loss for FeCo@C/HRGO reaches -76.6 dB at 16.64 GHz with a thickness of 1.7 mm. The R below -10 dB reaches 14.32 GHz for a thickness of 1.7-5.0 mm. This confirms that microwave absorption of FeCo@C can be substantially improved upon decoration with HRGO nanosheets.
在这项研究中，一种 Fe-Co 合金被碳包覆并修饰在多孔还原氧化石墨烯纳米片（FeCo@C/HRGO）复合材料上。该结构是通过液相还原和水热工艺以及高温煅烧合成的。采用 XRD、XPS、拉曼光谱、TEM 和 SEM 对 FeCo@C/HRGO 复合材料进行了鉴定和表征。这种新型复合材料表现出优异的电磁波吸收性能。在 1.7mm 的厚度下，FeCo@C/HRGO 的最大反射损耗达到-76.6dB，在 16.64GHz 处。在 1.7-5.0mm 的厚度下，R 低于-10dB 的范围达到 14.32GHz。这证实了 HRGO 纳米片的修饰可以显著提高 FeCo@C 的微波吸收能力。
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