Dan-dan Wu , Han-xiao Zhang , Zheng-yan Wang , Yan-lan Zhang , Yong-zhen Wang
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引用次数: 0
摘要
利用创新的微结构设计和合适的多组分制造具有强吸收能力和宽有效吸收带宽（EAB）的先进电磁吸收材料（EAMs）仍然是一项持久的挑战。在此，我们报告了通过水热还原氧化石墨烯（GO）、Ni(NO3)2-6H2O 和 Co(NO3)2-6H2O 的混合物，制备出具有填充 NiCo2(CO3)3 的自组装三维网状结构的还原型 GO（RGO）材料。通过结合三维互联网状结构以及 NiCo2(CO3)3 和 RGO 之间的各种界面，实现了高电磁波吸收（EMA）。2.3 mm 时的最小反射损耗（RLmin）为 -58.5 dB，EAB 为 6.5 GHz。气凝胶优异的 EMA 性能可归因于多孔三维结构的多重反射、散射和弛豫过程以及界面基质的强极化。
3D porous NiCo2(CO3)3/reduced graphene oxide aerogel with heterogeneous interfaces for high-efficiency microwave absorption
Advanced electromagnetic absorbing materials (EAMs) with strong absorption and a wide effective absorption bandwidth (EAB), using innovative microstructural design and suitable multicomponents remain a persistent challenge. Here, we report the production of a material by the hydrothermal reduction of a mixture of graphene oxide (GO), Ni(NO3)2·6H2O, and Co(NO3)2·6H2O, resulting in reduced GO (RGO) with a self-assembled 3D mesh structure filled with NiCo2(CO3)3. The unique microstructure of this assembly not only solves the problem of NiCo2(CO3)3 particles agglomerating but also changes the electromagnetic parameters, thereby improving the impedance matching and attenuation ability. High electromagnetic wave absorption (EMA) was achieved by combining the 3D interconnected mesh structure and the various interfaces between NiCo2(CO3)3 and RGO. The minimal reflection loss (RLmin) was −58.5 dB at 2.3 mm, and the EAB was 6.5 GHz. The excellent EMA performance of the aerogel can be attributed to the multiple reflection, scattering, and relaxation process of the porous 3D structure as well as the strong polarization of the interfacial matrix.
期刊介绍：
New Carbon Materials is a scholarly journal that publishes original research papers focusing on the physics, chemistry, and technology of organic substances that serve as precursors for creating carbonaceous solids with aromatic or tetrahedral bonding. The scope of materials covered by the journal extends from diamond and graphite to a variety of forms including chars, semicokes, mesophase substances, carbons, carbon fibers, carbynes, fullerenes, and carbon nanotubes. The journal's objective is to showcase the latest research findings and advancements in the areas of formation, structure, properties, behaviors, and technological applications of carbon materials. Additionally, the journal includes papers on the secondary production of new carbon and composite materials, such as carbon-carbon composites, derived from the aforementioned carbons. Research papers on organic substances will be considered for publication only if they have a direct relevance to the resulting carbon materials.
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