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Tunable High‐Performance Microwave Absorption of Co 1– x S Hollow Spheres Constructed by Nanosheets within Ultralow Filler Loading
Author(s) -
Zhang XiaoJuan,
Zhu JiaQiang,
Yin PengGang,
Guo AoPing,
Huang AnPing,
Guo Lin,
Wang GuangSheng
Publication year - 2018
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201800761
Subject(s) - materials science , reflection loss , microwave , microsphere , spheres , absorption (acoustics) , bandwidth (computing) , hydrothermal circulation , x band , cobalt , optoelectronics , composite material , composite number , chemical engineering , telecommunications , physics , astronomy , engineering , computer science , metallurgy
Absorbers with lightweight, low filler loading and broad absorption band are highly desirable for electromagnetic wave absorption field. Here, hollow Co 1– x S microspheres constructed by nanosheets are fabricated via a facile synthetic method based on hydrothermal route. As an efficient wave absorber, the Co 1– x S hollow spheres demonstrate excellent microwave absorption performance. With a weight content of only 3 wt%, the maximum reflection loss (RL) can reach as strong as −46.1 dB at 13.92 GHz and its qualified frequency bandwidth (with RL value over −10 dB) remarkably achieves 5.6 GHz, covering 35% of the entire measured bandwidth. In addition, compared with other cobalt sulfides (such as CoS 2 and Co 9 S 8 ), the Co 1– x S microspheres with hollow structure exhibit more superior absorption intensity and broader qualified bandwidth. Therefore, this work provides a promising approach for the design and synthesis of hollow Co 1– x S microspheres with lightweight and high‐performance microwave absorption.