期刊
SYNTHETIC METALS
卷 272, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.synthmet.2020.116644
关键词
Carbon nanotube; N-doped carbon; Nickel-assisted pyrolysis; Microwave absorption
资金
- China Postdoctoral Science Foundation [2020M671501]
- National Natural Science Foundation of China [51702161]
This study presents a convenient strategy for one-step synthesis of bamboo-shaped magnetic N-doped carbon nanotubes (BMN-CNT) with excellent microwaves absorption performance up to 19 dB. A model involving multi-polarization, internal reflection, and magnetic loss is proposed to explain the dissipation mechanism of BMN-CNT on microwaves, opening up exploration of novel magnetic carbon nanostructures for microwave absorption applications.
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.
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