Abstract The development of carbon materials with unique nanostructure and appropriate magnetism is of great importance in design of high-performance microwaves absorption materials. In this work, we provide a convenient strategy for one-step synthesis of a bamboo-shaped magnetic N-doped carbon nanotube (BMN-CNT) via a nickel (Ni)-assisted pyrolysis process. During synthetic process, Ni nanoparticles form and play as a catalyst for the catalytic calcination of melamine. The BMN-CNT exhibits excellent microwaves absorption performance, where the maximal reaches − 19 dB. A model referring to multi-polarization, internal reflection, and magnetic loss is used to explain the dissipation mechanism of BMN-CNT on microwaves. This research opens up the exploration of novel magnetic carbon nanostructures for MA applications.

中文翻译：

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镍辅助合成具有优异微波吸收性能的磁性竹状掺氮碳纳米结构

摘要 开发具有独特纳米结构和适当磁性的碳材料对于高性能微波吸收材料的设计具有重要意义。在这项工作中，我们为通过镍 (Ni) 辅助热解过程一步合成竹状磁性 N 掺杂碳纳米管 (BMN-CNT) 提供了一种方便的策略。在合成过程中，Ni纳米颗粒形成并作为催化煅烧三聚氰胺的催化剂。BMN-CNT 表现出优异的微波吸收性能，最大值达到 - 19 dB。使用涉及多极化、内反射和磁损耗的模型来解释 BMN-CNT 在微波上的耗散机制。这项研究开辟了用于 MA 应用的新型磁性碳纳米结构的探索。