Tunable high-performance microwave absorption of cobalt nanoparticles wrapped in N-self-doped carbon nanofibers at ultralow filler loadings

doi:10.1016/j.jallcom.2022.167808

IMR OpenIR

	Tunable high-performance microwave absorption of cobalt nanoparticles wrapped in N-self-doped carbon nanofibers at ultralow filler loadings
	Yan, Liang 1; Xiang, Jun 1; Guan, Guangguang 2,3; Zhang, Haoyan 1; Zhang, Yamei 1; Zhang, Kaiyin 4
通讯作者	Xiang, Jun(jxiang@just.edu.cn) ; Zhang, Kaiyin(zhangkaiyin@wuyiu.edu.cn)
	2023-02-05
发表期刊	JOURNAL OF ALLOYS AND COMPOUNDS
ISSN	0925-8388
卷号	933 页码:14
摘要	Manufacturing lightweight, ultralow filler loading, broad bandwidth and highly efficient microwave absorbers is still a challenge. Herein, we have synthesized Co nanoparticles decorated N-self-doped carbon nanofibers (Co@NCNFs) composite by electrospinning followed by a two-step heat treatment and investigated its electromagnetic (EM) and microwave absorption performances under different filler contents (from 2.5 to 7.5 wt%) in paraffin wax matrix. It is found that the Co@NCNFs composite has strong ferromagnetism and moderate graphitization degree as well as abundant polar groups and defects, and Co nanoparticles encapsulated by graphitic carbon layers with sizes around 45-115 nm are uniformly dispersed in the NCNFs. With increasing the filler loading, the EM attenuation ability is gradually strengthened while the impedance matching level is just the opposite. The EM absorbing properties of the composites are more superior within 5.0 wt% Co@NCNFs loading owing to the synergy of improved impedance matching and satisfactory EM dissipation ability. Under an ultralow filler loading of 2.5 wt%, the optimal reflection loss (RL) can reach as strong as -49.3 dB at 17.83 GHz with a thin thickness of 1.61 mm and the maximum effective absorption bandwidth (EAB, RL < -10.0 dB) is as wide as 5.44 GHz (12.56-16.99 GHz) at 1.92 mm. When the filler loading is only 5.0 wt%, a minimum RL value of -52.3 dB is achieved at 6.36 GHz with the thickness of 3.03 mm and the maximum EAB is 4.64 GHz (13.36-18.00 GHz) at 1.42 mm. Compared to other Co/C composite absorbers, the as-prepared Co@NCNFs composite with well-designed constitute and structure demonstrates the better comprehensive absorption performance at a much lower filler loading. Therefore, the present Co@NCNFs may be more promising for practical applications as lightweight and high-performance EM wave absorbers especially in the medium and high frequency range.
关键词	Carbon nanofibers Co nanoparticles Microwave absorption Filler loading Electrospinning
资助者	National Natural Science Foundation of China ; Natural Science Foundation of Fujian Province ; Postgraduate Research & Practice Innovation Program of Jiangsu Province
DOI	10.1016/j.jallcom.2022.167808
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51271059] ; Natural Science Foundation of Fujian Province[2020J01393] ; Postgraduate Research & Practice Innovation Program of Jiangsu Province[KYCX22-3816]
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000893661700002
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：16[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/176105
专题	中国科学院金属研究所
通讯作者	Xiang, Jun; Zhang, Kaiyin
作者单位	1.Jiangsu Univ Sci & Technol, Sch Sci, Zhenjiang 212100, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 4.Wuyi Univ, Coll Mech & Elect Engn, Wuyishan 354300, Peoples R China
推荐引用方式 GB/T 7714	Yan, Liang,Xiang, Jun,Guan, Guangguang,et al. Tunable high-performance microwave absorption of cobalt nanoparticles wrapped in N-self-doped carbon nanofibers at ultralow filler loadings[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2023,933:14.
APA	Yan, Liang,Xiang, Jun,Guan, Guangguang,Zhang, Haoyan,Zhang, Yamei,&Zhang, Kaiyin.(2023).Tunable high-performance microwave absorption of cobalt nanoparticles wrapped in N-self-doped carbon nanofibers at ultralow filler loadings.JOURNAL OF ALLOYS AND COMPOUNDS,933,14.
MLA	Yan, Liang,et al."Tunable high-performance microwave absorption of cobalt nanoparticles wrapped in N-self-doped carbon nanofibers at ultralow filler loadings".JOURNAL OF ALLOYS AND COMPOUNDS 933(2023):14.