Prussian Blue Derived Fe/C Anchoring on Multiwalled Carbon Nanotubes Forming Chain-Like Efficient Electromagnetic Wave A
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https://doi.org/10.1007/s11664-020-08402-5 2020 The Minerals, Metals & Materials Society
Prussian Blue Derived Fe/C Anchoring on Multiwalled Carbon Nanotubes Forming Chain-Like Efficient Electromagnetic Wave Absorbent KANG PENG,2 RUIQI WANG,3 HONG CHEN,1 SHIKUO LI,4 FANGZHI HUANG,4 BAOJUN WANG,1 and HUI ZHANG1,5,6 1.—School of Physics and Materials Science, Anhui University, Hefei 230601, People’s Republic of China. 2.—Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, People’s Republic of China. 3.—School of Chemical and Environmental Engineering, University of Nottingham Ningbo China, Ningbo 315100, People’s Republic of China. 4.—School of Chemistry and Chemical Engineering, Anhui University, Hefei 230601, People’s Republic of China. 5.—Key Laboratory of Structure and Functional Regulation of Hybrid Materials, Anhui University, Ministry of Education, Hefei 230601, People’s Republic of China. 6.—e-mail: [email protected]
Lightweight composites with excellent electromagnetic wave (EMW) absorption performance have attracted increasing attention from researchers. Among these composites, multiwalled carbon nanotubes (MCNTs) are considered as potential candidates, exhibiting excellent dielectric loss, but their magnetic loss is very weak. In our work, we synthesize a one-dimensional chain-like composite with Prussian blue (PB) derived Fe/C anchoring on MCNTs (MCNTs@Fe/C) by two facile processes. The MCNTs are successfully magnetically modified by Fe/C, the derivative of PB, forming an efficient EMW absorbent. The EMW absorption performance is related to complex permittivity and permeability, which can be adjusted by changing the content of PB and MCNTs and the annealing temperature; consequently great attenuation capability and favorable input impedance (Zin) was acquired. The minimum reflection loss (RL) reached 44.26 dB at 8.32 GHz with a thickness of 2.4 mm, the corresponding absorption bandwidth (RL < 10 dB) was 3.68 GHz (5.6–9.28 GHz), and the coercivity was 151.85 Oe. This work offers a chain-like structure composite which can effectively attenuate EMW energy and paves a way for designing lightweight EMW absorbents. Key words: Multiwalled carbon nanotubes, nanocomposite, prussian blue, wave absorption, chain-like structure
INTRODUCTION Electromagnetic radiation produced by electronic and communication equipment can be harmful to the environment and to our heath, so various electromagnetic wave (EMW) absorption materials have been studied.1,2 According to electromagnetic
(Received February 22, 2020; accepted August 6, 2020) The authors Kang Peng and Ruiqi Wang have contributed equally to this paper.
theory, the electromagnetic wave absorption performance is related to dielectric loss, magnetic loss and impedance matching.3–5 Many carbon materials demonstrating high dielectric loss have been considered as suitable absorbing materials and researchers have made great progress in this aspect, but their magnetic loss is very weak, which limits their performance improvem
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