Tailoring of N-doped graphite coated cobalt nanoparticles via arc discharge enables high microwave absorption
文献类型：期刊论文
| 作者 | Shao, Xuelian1,2; Wang, Tianhui1,2; Gan, Zhengya1; Hu, Rui1; Gong, Yi1; Li, Xiaoxiao1 ; Zhang, Xian1; Tian, Xingyou1
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| 刊名 | CARBON
 |
| 出版日期 | 2021-06-15 |
| 卷号 | 177 |
| 关键词 | Nitrogen doping Co@G nanocapsules Arc discharge Microwave absorption |
| ISSN号 | 0008-6223 |
| DOI | 10.1016/j.carbon.2021.02.068 |
| 通讯作者 | Hu, Rui(ruihu@rntek.cas.cn) ; Tian, Xingyou(xytian@issp.ac.cn) |
| 英文摘要 | Nitrogen-doped graphite-encapsulated cobalt nanoparticles (Co@G NPs) were fabricated via a one-step arc-discharge method. The core/shell nanostructure and surface functionality were tailored by changing the ammonia content in the working gas mixture. Specifically, the average core diameter changed from 5 to 23 nm, average graphite shell thickness from 1.5 to 3.5 nm as the NH3 ratio increased from 0% to 20%. All these arc products exhibited better microwave absorption properties than the pristine Co micro powders. Co@G NPs prepared with 5% of NH3 presented 1.5 at.% of surface doping nitrogen, showing the optimal reflection loss (RL) value of -37.70 dB at the thickness of 5 mm. For the products prepared with 12.5% of NH3, wide absorption bandwidths of 5.60 GHz (RL < -10 dB) and 1.55 GHz (RL < -20 dB) were achieved. The enhancing electromagnetic loss could be attributed to the proper impedance match of dielectric loss (conductance loss, dielectric relaxation (dipolar polarization) and space-charge polarization) and magnetic loss (the eddy current loss, magnetic hysteresis loss and residual loss). This work unlocked an open platform for the facile fabrication of new generation microwave absorbers with light, thin, strong and wide characteristics. (c) 2021 Elsevier Ltd. All rights reserved. |
| WOS关键词 | ELECTROMAGNETIC-WAVE ABSORPTION ; ENCAPSULATED MAGNETIC NANOPARTICLES ; AT-C NANOCAPSULES ; CARBON NANOTUBES ; SHELL THICKNESS ; BROAD-BAND ; GRAPHENE ; FRAMEWORK ; SPHERES |
| 资助项目 | National Natural Science Foundation of China[21875257] ; CAS Pioneer Hundred Talents Program of Chinese Academy of Sciences |
| WOS研究方向 | Chemistry ; Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000639557600019 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 资助机构 | National Natural Science Foundation of China ; CAS Pioneer Hundred Talents Program of Chinese Academy of Sciences |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/121935]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 通讯作者 | Hu, Rui; Tian, Xingyou |
| 作者单位 | 1.Chinese Acad Sci, Hefei Inst Phys Sci, Inst Solid State Phys, Key Lab Photovolta & Energy Conservat Mat, Hefei 230031, Peoples R China 2.Univ Sci & Technol China, Hefei 230026, Peoples R China |
| 推荐引用方式 GB/T 7714 | Shao, Xuelian,Wang, Tianhui,Gan, Zhengya,et al. Tailoring of N-doped graphite coated cobalt nanoparticles via arc discharge enables high microwave absorption[J]. CARBON,2021,177. |
| APA | Shao, Xuelian.,Wang, Tianhui.,Gan, Zhengya.,Hu, Rui.,Gong, Yi.,...&Tian, Xingyou.(2021).Tailoring of N-doped graphite coated cobalt nanoparticles via arc discharge enables high microwave absorption.CARBON,177. |
| MLA | Shao, Xuelian,et al."Tailoring of N-doped graphite coated cobalt nanoparticles via arc discharge enables high microwave absorption".CARBON 177(2021). |
入库方式： OAI收割
来源：合肥物质科学研究院
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