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Oxygen-sulfur Co-substitutional Fe@C nanocapsules for improving microwave absorption properties
Alternative TitleOxygen-sulfur Co-substitutional Fe@C nanocapsules for improving microwave absorption properties
Li Yixing1; Chen Xinyu1; Wei Qian1; Liu Weiwei2; Zhang Yanhui1; Qin Gaowu1; Shi Zhen2; Zhang Xuefeng1
2020
Source PublicationSCIENCE BULLETIN
ISSN2095-9273
Volume65Issue:8Pages:623-630
AbstractHeteroatom substitution has been investigated to be a feasible way to optimize microwave absorption properties of core-shell structural nanocapsules at gigahertz. Although dielectric capacity has been increased at specific frequency with substituted absorbents, its broadband absorption performance is still relatively poor ascribed to the low dipole oscillation amplitude of single substituted heteroatom. In this study we demonstrate that sulfur and oxygen co-substituted heterostructure leads to high microwave absorption property of core-shell structural Fe@C nanocapsules at broadened frequency range, comparable to the single sulfur substitutional Fe@C nanocapsules. Experimental characterizations coupled with first-principles calculations reveal that the microwave absorption enhancement is triggered by the sulfur-oxygen co-substitution, which results in the serious symmetry breaking and thus leads to the charge separation at the co-substituted area. In particular, the nanocapsules exhibt the minimum reflection loss capcacity R(dB) of -52 dB at 6.8 GHz and the bandwith for R(dB) <-20 dB is in the frequency range of 3.1-12.7 GHz. The present study not only offers a deep insight into the relationship between heteroatom and microwave absorption property, but also puts forward a mentality for further designing microwave absorbents. (C) 2020 Science China Press. Published by Elsevier B.V. and Science China Press. All rights reserved.
KeywordCOMPLEX PERMITTIVITY TOPOLOGICAL DEFECTS RAMAN-SPECTROSCOPY GRAPHENE IRON PERMEABILITY TRANSITION FRAMEWORKS THICKNESS DISCHARGE Microwave absorption Electric-dipole Substitution Core@shell Sulfur-oxygen doped
Indexed ByCSCD
Language英语
Funding Project[National Natural Science Foundation of China] ; [Fundamental Research Funds for the Central Universities] ; [Zhejiang Provincial Natural Science Foundation] ; [National 1000-Plan for Young Scholars] ; [Northeastern University of China]
CSCD IDCSCD:6763614
Citation statistics
Cited Times:1[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/148677
Collection中国科学院金属研究所
Affiliation1.中国科学院金属研究所
2.Hangzhou Dianzi Univ, Coll Materials & Environm Engn, Inst Adv Magnet Materials, Hangzhou 310012, Peoples R China
Recommended Citation
GB/T 7714
Li Yixing,Chen Xinyu,Wei Qian,et al. Oxygen-sulfur Co-substitutional Fe@C nanocapsules for improving microwave absorption properties[J]. SCIENCE BULLETIN,2020,65(8):623-630.
APA Li Yixing.,Chen Xinyu.,Wei Qian.,Liu Weiwei.,Zhang Yanhui.,...&Zhang Xuefeng.(2020).Oxygen-sulfur Co-substitutional Fe@C nanocapsules for improving microwave absorption properties.SCIENCE BULLETIN,65(8),623-630.
MLA Li Yixing,et al."Oxygen-sulfur Co-substitutional Fe@C nanocapsules for improving microwave absorption properties".SCIENCE BULLETIN 65.8(2020):623-630.
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