College of Chemistry and Life Sciences, Zhejiang Normal University , Jinhua, Zhejiang 321004, China.
ACS Appl Mater Interfaces. 2017 Apr 26;9(16):14103-14111. doi: 10.1021/acsami.7b03330. Epub 2017 Apr 11.
Hierarchical structured ZnFeO@SiO@RGO core-shell nanocomposites were prepared via a "coating-coating" route, and its structure, composition and electromagnetic properties were characterized. Compared with the binary composites of ZnFeO@SiO, the hierarchical ZnFeO@SiO@RGO ternary composites exhibited enhanced electromagnetic wave (EMW) absorption properties in terms of the effective bandwidth and minimum reflection loss (RL). Furthermore, EMW absorption properties of the prepared samples can be tuned by changing RGO content and thickness of SiO layer to reach the best impedance match. The minimum RL of the sample with a thickness of 2.8 mm can reach -43.9 dB at 13.9 GHz, and its effective bandwidth (RL ≤ -10 dB) was up to 6 GHz. Hence, the obtained products can be a new candidate for lightweight EMW absorbing materials.
分层结构的 ZnFeO@SiO@RGO 核壳纳米复合材料通过“涂层-涂层”路线制备，并对其结构、组成和电磁性能进行了表征。与二元复合材料 ZnFeO@SiO 相比，分层的 ZnFeO@SiO@RGO 三元复合材料在有效带宽和最小反射损耗（RL）方面表现出增强的电磁波（EMW）吸收性能。此外，通过改变 RGO 含量和 SiO 层厚度来调整所制备样品的 EMW 吸收性能，以达到最佳的阻抗匹配。厚度为 2.8mm 的样品的最小 RL 可在 13.9GHz 时达到-43.9dB，其有效带宽（RL≤-10dB）高达 6GHz。因此，所获得的产物可以成为轻质 EMW 吸收材料的新候选材料。
