Tailoring of N-doped graphite coated cobalt nanoparticles via arc discharge enables high microwave absorption

doi:10.1016/j.carbon.2021.02.068

HFCAS OpenIR

	Tailoring of N-doped graphite coated cobalt nanoparticles via arc discharge enables high microwave absorption
	Shao, Xuelian 1,2; Wang, Tianhui 1,2; Gan, Zhengya 1; Hu, Rui 1; Gong, Yi 1; Li, Xiaoxiao1 ; Zhang, Xian1 ; Tian, Xingyou1
	2021-06-15
发表期刊	CARBON
ISSN	0008-6223
通讯作者	Hu, Rui(ruihu@rntek.cas.cn) ; Tian, Xingyou(xytian@issp.ac.cn)
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.
关键词	Nitrogen doping Co@G nanocapsules Arc discharge Microwave absorption
DOI	10.1016/j.carbon.2021.02.068
关键词[WOS]	ELECTROMAGNETIC-WAVE ABSORPTION ; ENCAPSULATED MAGNETIC NANOPARTICLES ; AT-C NANOCAPSULES ; CARBON NANOTUBES ; SHELL THICKNESS ; BROAD-BAND ; GRAPHENE ; FRAMEWORK ; SPHERES
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[21875257] ; CAS Pioneer Hundred Talents Program of Chinese Academy of Sciences
项目资助者	National Natural Science Foundation of China ; CAS Pioneer Hundred Talents Program of Chinese Academy of Sciences
WOS研究方向	Chemistry ; Materials Science
WOS类目	Chemistry, Physical ; Materials Science, Multidisciplinary
WOS记录号	WOS:000639557600019
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：21[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.hfcas.ac.cn:8080/handle/334002/121936
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
第一作者单位	中科院固体物理研究所
通讯作者单位	中科院固体物理研究所
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).