Heteronanostructured Co@carbon nanotubes-graphene ternary hybrids: synthesis, electromagnetic and excellent microwave absorption properties.
Heteronanostructured Co@carbon nanotubes-graphene ternary hybrids: synthesis, electromagnetic and excellent microwave absorption properties.
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异质纳米结构Co@碳纳米管-石墨烯三元杂化物：合成、电磁和优异的微波吸收性能
DOI：
10.1038/srep37972
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发表时间：
2016-11-28
影响因子：
4.6
通讯作者：
Du Y
中科院分区：
文献类型：
--
作者：
Qi X;Hu Q;Cai H;Xie R;Bai Z;Jiang Y;Qin S;Zhong W;Du Y
为了探索高效微波吸收材料，设计并制备了异质纳米结构的Co@碳纳米管-石墨烯（Co@CNTs-G）三元杂化材料，以Co 3 O 4/还原氧化石墨烯（Co 3 O 4/RGO）为催化剂，在设计温度（400、450、500和550 °C）下催化乙炔分解。通过调节反应温度，可以合成不同碳纳米管含量的Co@CNTs-G三元杂化物。研究表明，所制备的Co@CNTs-G三元杂化材料具有优异的微波吸收性能，其电磁和微波吸收性能可通过CNT含量进行调节。对于在400、450、500和550 °C下合成的三元混合物，最小反射损耗（RL）值分别达到约-65.6、-58.1、-41.1和-47.5 dB。在大频率范围内，Co@CNTs-G三元杂化材料的RL值低于-20 dB（99%的电磁波衰减）。在此基础上，对增强微波吸收的可能机理进行了详细的讨论。因此，为探索高性能的石墨烯吸波材料以及拓展石墨烯基材料的应用领域提供了一条简单的途径。
In order to explore high efficiency microwave absorption materials, heteronanostructured Co@carbon nanotubes-graphene (Co@CNTs-G) ternary hybrids were designed and produced through catalytic decomposition of acetylene at the designed temperature (400, 450, 500 and 550 °C) over Co3O4/reduced graphene oxide (Co3O4/RGO). By regulating the reaction temperatures, different CNT contents of Co@CNTs-G ternary hybrids could be synthesized. The investigations indicated that the as-prepared heteronanostructured Co@CNTs-G ternary hybrids exhibited excellent microwave absorption properties, and their electromagnetic and microwave absorption properties could be tuned by the CNT content. The minimum reflection loss (RL) value reached approximately −65.6, −58.1, −41.1 and −47.5 dB for the ternary hybrids synthesized at 400, 450, 500 and 550 °C, respectively. And RL values below −20 dB (99% of electromagnetic wave attenuation) could be obtained over the as-prepared Co@CNTs-G ternary hybrids in the large frequency range. Moreover, based on the obtained results, the possible enhanced microwave absorption mechanisms were discussed in details. Therefore, a simple approach was proposed to explore the high performance microwave absorbing materials as well as to expand the application field of graphene-based materials.
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影响因子：
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作者：
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通讯作者：
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