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Research Article

Electrospinning fabrication and ultra-wideband electromagnetic wave absorption properties of CeO2/N-doped carbon nanofibers

Pei-Yan Zhao1, Hui-Ya Wang1, Bo Cai1, Xiao-Bo Sun1, Zhi-Ling Hou3, Jun-Tao Wu1( ), Ming Bai2( ), Guang-Sheng Wang1( )
School of Chemistry, Beihang University, Beijing 100191, China
School of Electronics and Information Engineering, Beihang University, Beijing 100191, China
College of Mathematics and Physics & Beijing Key Laboratory of Environmentally Harmful Chemical Analysis, Beijing University of Chemical Technology, Beijing 100029, China
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Graphical Abstract

The novel CeO2/nitrogen-doped carbon (CeO2/N-C) nanofiber was prepared by electrospinning and sintering. The CeO2/N-C nanofiber exhibits ultra-wideband (8.48 GHz) at 2.5 mm and value of reflection loss (RL) (−42.59 dB) at 3 wt.% filler content.

Abstract

The impedance mismatch of carbon materials is a key factor limiting their widespread use in electromagnetic (EM) wave absorption. In this work, the novel CeO2/nitrogen-doped carbon (CeO2/N-C) nanofiber was prepared to solve the problem by electrospinning and sintering. X-ray diffraction (XRD), Raman, X-ray photoelectron spectroscopy (XPS), and transmission electron microscopy (TEM) analyses demonstrated CeO2 was successfully loaded onto the surface of partially graphitized carbon fibers. Different sintering temperatures change the graphitization degree of material, and the oxygen vacancy structure of CeO2 and defects from N doping optimize the impedance matching of the material. When the sintering temperature reaches 950 °C, CeO2/N-C fiber possesses the minimum reflection loss (RLmin) value of −42.59 dB at 2.5 mm with a filler loading of only 3 wt.% in polyvinylidene difluoride (PVDF). Meanwhile, the CeO2/N-C fiber achieves a surprising wideband (8.48 GHz) at a thickness of 2.5 mm, covering the whole Ku-band as well as 63% of the X-band at the sintering temperature of 650 °C. This work provides the research basis for widely commercial applications of carbon-based nanofiber absorbers.

Keywords

electrospinningelectromagnetic wave absorptionCeO2/N-doped carbon nanofiber wideband

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Nano Research
Volume 15 Issue 9,
September 2022
Pages 7788-7796
DOI: 10.1007/s12274-022-4675-x
Cite this article:
Zhao P-Y, Wang H-Y, Cai B, et al. Electrospinning fabrication and ultra-wideband electromagnetic wave absorption properties of CeO2/N-doped carbon nanofibers. Nano Research, 2022, 15(9): 7788-7796. https://doi.org/10.1007/s12274-022-4675-x
Topics:
CarbonCerium compoundsCerium oxideElectrospinning
Part of a topical collection:
EM Wave Functional MaterialsEM Wave Functional Materials

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Received: 25 May 2022
Revised: 10 June 2022
Accepted: 17 June 2022
Published: 14 July 2022
© Tsinghua University Press 2022
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