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Electrospinning fabrication and ultra-wideband electromagnetic wave absorption properties of CeO_(2)/N-doped carbon nanofibers

查看全文 作　　者：Pei-Yan [1]Zhao;Hui-Ya [1]Wang;Bo [1]Cai;Xiao-Bo [1]Sun;Zhi-Ling [3]Hou;Jun-Tao [1]Wu;Ming [2]Bai;Guang-Sheng [1]Wang 高影响力作者 机构地区：[1]School of Chemistry,Beihang University,Beijing 100191,China;[2]School of Electronics and Information Engineering,Beihang University,Beijing 100191,China;[3]College of Mathematics and Physics&Beijing Key Laboratory of Environmentally Harmful Chemical Analysis,Beijing University of Chemical Technology,Beijing 100029,China高影响力机构 出　　处：《Nano Research》索引2022年第15卷第9期,共9页高影响力期刊 基　　金：the National Natural Science Foundation of China(No.52073010). 摘　　要：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_(2)/nitrogen-doped carbon(CeO_(2)/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_(2)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_(2)and defects from N doping optimize the impedance matching of the material.When the sintering temperature reaches 950℃,CeO_(2)/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 CeO_(2)/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℃.This work provides the research basis for widely commercial applications of carbon-based nanofiber absorbers. 关 键 词：ELECTROSPINNING electromagnetic wave absorption CeO_(2)/N-doped carbon nanofiber WIDEBAND
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