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Electrospinning fabrication and ultra-wideband electromagnetic wave absorption properties of CeO2/N-doped carbon nanofibers.
- Source :
- Nano Research; Sep2022, Vol. 15 Issue 9, p7788-7796, 9p
- Publication Year :
- 2022
-
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 CeO<subscript>2</subscript>/nitrogen-doped carbon (CeO<subscript>2</subscript>/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 CeO<subscript>2</subscript> 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 CeO<subscript>2</subscript> and defects from N doping optimize the impedance matching of the material. When the sintering temperature reaches 950 °C, CeO<subscript>2</subscript>/N-C fiber possesses the minimum reflection loss (RL<subscript>min</subscript>) value of −42.59 dB at 2.5 mm with a filler loading of only 3 wt.% in polyvinylidene difluoride (PVDF). Meanwhile, the CeO<subscript>2</subscript>/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. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 19980124
- Volume :
- 15
- Issue :
- 9
- Database :
- Complementary Index
- Journal :
- Nano Research
- Publication Type :
- Academic Journal
- Accession number :
- 158563347
- Full Text :
- https://doi.org/10.1007/s12274-022-4675-x