Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 926, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2022.166875
Keywords
Hollow; Core-shell; Microwave absorption
Categories
Funding
- National Key R&D Program of China [2021YFB3502500]
- State Key Laboratory of Silicon Materials [SKL2020-06]
- Ten Thousand Talents Project of Zhejiang [2019R52056]
- Open Fund of Large Facilities in Nanjing University of Science and Technology
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In this study, a novel nanocomposite with irregular hollow nanostructure of Co9S8@C was successfully prepared, exhibiting excellent microwave absorption performance with high absorption efficiency, broad absorption bandwidth, and low density.
Aiming to obtain advanced microwave absorbing materials with high absorption efficiency, broad ab-sorption bandwidth and low density, herein, a novel nanocomposite with irregular hollow nanostructure of Co9S8@C was successfully prepared via a soft template and annealing method. Due to the shrinkage process of the Co9S8 nanospheres by annealing, Co9S8 cores and carbon shells were easily obtained. Because of the unique microstructure with irregular outer shells and heterogeneous interfaces, improved polarization loss, multiple reflection loss as well as the impedance matching capability was achieved. As a result, greatly enhanced microwave absorption performance with a reflection loss (RL) of - 51.3 dB at 4.12 GHz, and effective absorption bandwidth (RL< -10 dB) of 5.44 GHz at a thickness of only 1.35 mm was obtained, suggesting the unique Co9S8@C nanocomposite in this work to be an intriguing and promising microwave absorber.(c) 2022 Elsevier B.V. All rights reserved.
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