改性氧化石墨烯/Fe_3O_4复合材料的制备及电磁吸收性能
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摘要
为改善氧化石墨烯(GO)/Fe_3O_4复合材料的分散程度,利用三苯基膦(PPh3)对GO表面进行功能化改性得到改性氧化石墨烯(GOP),然后采用共沉淀法一步合成GOP/Fe_3O_4复合材料。通过场发射SEM、高分辨TEM、XRD、FTIR、Raman和VSM对GOP/Fe_3O_4复合材料的形貌、结构和磁性能进行表征。利用矢量网络分析仪(PNA)测试了GOP/Fe_3O_4复合材料的电磁参数并模拟计算其对电磁波的吸收性能。结果显示:GOP/Fe_3O_4复合材料的最大电磁波吸收强度值达到-25.4dB,有效吸收频宽为6.0GHz,较未改性GO/Fe_3O_4复合材料均有大幅度提高。
In order to improve the dispersion degree of graphene oxide(GO)/Fe_3O_4 composites,modified graphene oxide(GOP)was obtained by functional modification of GO surface with triphenylphosphine(PPh3).GOP/Fe_3O_4 composites was synthesized in one step by coprecipitation method.The morphologies,structures and magnetic properties of GOP/Fe_3O_4 composites were characterized by SEM,TEM,XRD,FTIR,Raman and VSM.The electromagnetic parameters of the GOP/Fe_3O_4 composites were measured by phasor network analyzer(PNA),and the electromagnetic wave absorption properties of GOP/Fe_3O_4 composites were simulated.The results show that the maximum absorption peak value of GOP/Fe_3O_4 composites is-25.4 dB and the maximum absorption bandwidth is6.0 GHz,which is greatly improved compared with the unmodified GO/Fe_3O_4 composites.
In order to improve the dispersion degree of graphene oxide(GO)/Fe_3O_4 composites,modified graphene oxide(GOP)was obtained by functional modification of GO surface with triphenylphosphine(PPh3).GOP/Fe_3O_4 composites was synthesized in one step by coprecipitation method.The morphologies,structures and magnetic properties of GOP/Fe_3O_4 composites were characterized by SEM,TEM,XRD,FTIR,Raman and VSM.The electromagnetic parameters of the GOP/Fe_3O_4 composites were measured by phasor network analyzer(PNA),and the electromagnetic wave absorption properties of GOP/Fe_3O_4 composites were simulated.The results show that the maximum absorption peak value of GOP/Fe_3O_4 composites is-25.4 dB and the maximum absorption bandwidth is6.0 GHz,which is greatly improved compared with the unmodified GO/Fe_3O_4 composites.
引文
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[2]MOTOJIMA S,HOSHIYA S,HISHIKAWA Y.Electromagnetic wave absorption properties of carbon microcoils/PMMA composite beads in W bands[J].Carbon,2003,41(13):2658-2660.
[3]KONG L,YIN X,YE F,et al.Electromagnetic wave absorption properties of ZnO-based materials modified with ZnAl2O4nanograins[J].Journal of Physical Chemistry C,2016,117(5):2135-2146.
[4]MEHDINIA A,KHODAEE N,JABBARI A.Fabrication of graphene/Fe3O4@polythiophene nanocomposite and its application in the magnetic solid-phase extraction of polycyclic aromatic hydrocarbons from environmental water samples[J].Analytica Chimica Acta,2015,868(12):1-9.
[5]WU Q,SHUI W J,WANG G S.The enhanced wave absorbing properties of SiC/PVDF composites affected by the SiC sizes[J].Science of Advanced Materials,2017,9(8):1401-1407.
[6]陈菲,陈爱华,赵永彬.纳米Fe3O4/聚吡咯复合材料的形貌可控制备及电磁特性[J].复合材料学报,2015,32(4):955-961.CHEN F,CHEN A H,ZHAO Y B.Morphology-controllable fabrication and conductive-magnetic properties of nano Fe3O4/polypyrrole composites[J].Acta Materiae Compositae Sinica,2015,32(4):955-961(in Chinese).
[7]YANG P,LIU Y,ZHAO X,et al.Electromagnetic wave absorption properties of FeCoNiCrAl0.8 high entropy alloy powders and its amorphous structure prepared by high-energy ball milling[J].Journal of Materials Research,2016,31(16):2398-2406.
[8]KONG L,YIN X,ZHANG Y,et al.Electromagnetic wave absorption properties of reduced grapheneoxide modified by maghemitecolloidal nanoparticle clusters[J].Journal of Physical Chemistry C,2017,17(38):19701-19711.
[9]HUANG X,YAN X,XIA L,et al.A three-dimensional graphene/Fe3O4/carbon microtube of sandwich-type architecture with improved wave absorbing performance[J].Scripta Materialia,2016,120:107-111.
[10]LIU Z,XU G,ZHANG M,et al.Synthesis of CoFe2O4/RGO nanocomposites by click chemistry and electromagnetic wave absorption properties[J].Journal of Materials Science:Materials in Electronics,2016,27(9):1-8.
[11]CHEN T,QIU J,ZHU K,et al.Enhanced electromagnetic wave absorption properties of polyaniline-coated Fe3O4/reduced graphene oxide nanocomposites[J].Journal of Materials Science:Materials in Electronics,2014,25(9):3664-3673.
[12]任芳,朱光明,任鹏刚.纳米石墨烯复合材料的制备及应用研究进展[J].复合材料学报,2014,31(2):263-272.REN F,ZHU G M,REN P G.The latest advances in preparation and application of nano graphene composites[J].Acta Materiae Compositae Sinica,2014,31(2):263-272(in Chinese).
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[14]CHANG Y,LI J,WANG B,et al.Synthesis of 3Dnitrogendoped graphene/Fe3O4by a metal ion induced self-assembly process for high-performance Li-ion batteries[J].Journal of Materials Chemistry A,2013,1(46):14658-14665.
[15]WANG T,LIU Z,LU M,et al.Graphene-Fe3O4,nanohybrids:Synthesis and excellent electromagnetic absorption properties[J].Journal of Applied Physics,2013,113(2):024314(1-8).
[16]XUE W D,ZHAO R,DU X,et al.Graphene-Fe3O4,micronano scaled hybrid spheres:Synthesis and synergistic electromagnetic effect[J].Materials Research Bulletin,2014,50(2):285-291.
[17]HU C,MOU Z,LU G,et al.3Dgraphene-Fe3O4nanocomposites with high-performance microwave absorption[J].Physical Chemistry Chemical Physics,2013,15(31):13038-13043.
[18]SHEN B,ZHAI W,TAO M,et al.Lightweight,multifunctional polyetherimide/graphene@Fe3O4composite foams for shielding of electromagnetic pollution[J].ACS Applied Materials&Interfaces,2013,5(21):11383-11391.
[19]DING Y,ZHANG L,LIAO Q L,et al.Electromagnetic wave absorption in reduced graphene oxide functionalized with Fe3O4/Fe nanorings[J].Nano Research,2016,9(7):2018-2025.
[20]WANG C C,YAN Y J,ZHANG L W,et al.MaxwellWagner relaxation in CaCu3Ti4O12/Ag composites[J].Scripta Materialia,2006,54(8):1501-1504.
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[22]李雪爱.改性Fe3O4吸波材料的制备及电磁性能[D].哈尔滨:哈尔滨工业大学,2007.LI X A.Preparation and electromagnetic properties of modified Fe3O4as microwave absorbing merterials[D].Harbin:Harbin Institute of Technology,2007(in Chinese).
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