工程科学学报，第40卷，第7期：849-856,2018年7月 Chinese Journal of Engineering,Vol.40,No.7:849-856,July 2018 DOI:10.13374/j.issn2095-9389.2018.07.011;http://journals.ustb.edu.cn Co掺杂对RGO/FeO4复合材料组织结构和吸波性能 的影响 黄玉炜，王玉江四，魏世丞，梁义，王博，黄威，徐滨士 陆军装甲兵学院装备再制造技术国防科技重点实验室，北京100072 ☒通信作者，E-mail:hitwyjG@126.com 摘要研究了Co掺杂对还原氧化石墨烯(RG0)/FO,复合材料结构、形貌和吸波性能的影响规律.采用一步水热法分别 制备RGO/Fe,O,和Co掺杂的RG0/FeO,复合材料，通过扫描电子显微镜、X射线衍射仪和X射线光电子能谱分析Co掺杂 对复合材料的微观形貌、相组成及表面元素价态的影响：利用矢量网络分析仪测定两种复合材料在2~18GHz频率范围内的 相对复介电常数和复磁导率，模拟计算了Co掺杂对RG0/F,O,复合吸波性能的影响规律.结果表明：部分Co参与了水热反 应生成了CoC0,,C0,0,和Co,0,还有部分Co以单质形式存在，其通过正负电荷吸引机制，影响Fe3·在氧化石墨烯(G0)表 面的配位，使得负载在还原氧化石墨烯(RGO)表面的F0:纳米颗粒部分迁移至RG0片层间：Co掺杂改善了复合材料的导 电能力和磁损耗能力，使复合材料的吸波能力显著增强.反射率模拟结果表明：掺杂后与掺杂前相比，当匹配厚度d=2.00mm 时，最大反射损耗提高3.44dB,有效吸收频带拓宽2.88Gz:当匹配厚度d=2.50mm时，最大反射损耗提高8.45dB,有效吸 收频带拓宽2.73GHz.Co掺杂对RG0/F©304复合材料的结构和形貌有显著影响，并有效改善复合材料的吸波性能. 关键词还原氧化石墨烯(RG0):四氧化三铁：C0掺杂：复合材料：吸波性能 分类号TB34 Effect of Co-doping on the microstructure and microwave absorbing properties of RGO/ Fe,0,composites HUANG Yu-wei,WANG Yu-jiang,WEI Shi-cheng,LIANG Yi,WANG Bo,HUANG Wei,XU Bin-shi National Key Laboratory for Remanufacturing,Army Academy of Armored Forces,Beijing 100072,China Corresponding author,E-mail:hitwyj@126.com ABSTRACT With the rapid development of precision guidance and radar detection technologies,radar absorbing materials have gained popularity.Traditional radar absorbing materials are limited because of a high density and narrow absorption band.To improve the absorption properties of traditional radar absorbing materials,developing radar absorbing material with thin-layer,light-weight, broadband and strong-absorbing is necessary.The effects of Co-doping on the structure,morphology,and microwave absorption proper- ties of reduced graphene oxide (RGO)/Fe,O composites were studied in this paper.The RGO/Fe,O and Co-doped RGO/FeFe,O composites were prepared via a one-step hydrothermal method.The effects of Co on the microstructure,phase composition,and valence state of the composite were analyzed using scanning electron microscopy,X-ray diffractometry,and X-ray photoelectron spectroscopy. The relative complex permittivity and permeability of RGO/Fe,O and Co-doped RGO/Fe,O,composites were within 2-18GHz,as re- corded by a vector network analyzer.The influence of Co-doping on the microwave absorption property of RGO/Fe,O,was simulated. The results show that a part of Co participates in the hydrothermal reaction to form CoCO,Co0,and Co2O,whereas some Co exists 收稿日期：2018-04-09 基金项目：国家自然科学基金资助项目(51675533,51701238,51705521)：中国工程院咨询研究项目(2017-XY-37):“十三五"装备预研共用技 术项目(404010205)工程科学学报,第 40 卷,第 7 期:849鄄鄄856,2018 年 7 月 Chinese Journal of Engineering, Vol. 40, No. 7: 849鄄鄄856, July 2018 DOI: 10. 13374 / j. issn2095鄄鄄9389. 2018. 07. 011; http: / / journals. ustb. edu. cn Co 掺杂对 RGO/ Fe3 O4 复合材料组织结构和吸波性能 的影响 黄玉炜, 王玉江苣 , 魏世丞, 梁 义, 王 博, 黄 威, 徐滨士 陆军装甲兵学院装备再制造技术国防科技重点实验室, 北京 100072 苣 通信作者,E鄄mail:hitwyj@ 126. com 摘 要 研究了 Co 掺杂对还原氧化石墨烯(RGO) / Fe3O4 复合材料结构、形貌和吸波性能的影响规律. 采用一步水热法分别 制备 RGO/ Fe3O4 和 Co 掺杂的 RGO/ Fe3O4 复合材料,通过扫描电子显微镜、X 射线衍射仪和 X 射线光电子能谱分析 Co 掺杂 对复合材料的微观形貌、相组成及表面元素价态的影响;利用矢量网络分析仪测定两种复合材料在 2 ~ 18 GHz 频率范围内的 相对复介电常数和复磁导率,模拟计算了 Co 掺杂对 RGO/ Fe3O4 复合吸波性能的影响规律. 结果表明:部分 Co 参与了水热反 应生成了 CoCO3 、Co3O4 和 Co2O3 ,还有部分 Co 以单质形式存在,其通过正负电荷吸引机制,影响 Fe 3 + 在氧化石墨烯(GO)表 面的配位,使得负载在还原氧化石墨烯(RGO)表面的 Fe3O4 纳米颗粒部分迁移至 RGO 片层间;Co 掺杂改善了复合材料的导 电能力和磁损耗能力,使复合材料的吸波能力显著增强. 反射率模拟结果表明:掺杂后与掺杂前相比,当匹配厚度 d = 2郾 00 mm 时,最大反射损耗提高 3郾 44 dB,有效吸收频带拓宽 2郾 88 GHz;当匹配厚度 d = 2郾 50 mm 时,最大反射损耗提高 8郾 45 dB,有效吸 收频带拓宽 2郾 73 GHz. Co 掺杂对 RGO/ Fe3O4 复合材料的结构和形貌有显著影响,并有效改善复合材料的吸波性能. 关键词 还原氧化石墨烯(RGO); 四氧化三铁; Co 掺杂; 复合材料; 吸波性能 分类号 TB34 收稿日期: 2018鄄鄄04鄄鄄09 基金项目: 国家自然科学基金资助项目(51675533,51701238,51705521);中国工程院咨询研究项目(2017鄄鄄XY鄄鄄37);“十三五冶装备预研共用技 术项目(404010205) Effect of Co鄄doping on the microstructure and microwave absorbing properties of RGO/ Fe3O4 composites HUANG Yu鄄wei, WANG Yu鄄jiang 苣 , WEI Shi鄄cheng, LIANG Yi, WANG Bo, HUANG Wei, XU Bin鄄shi National Key Laboratory for Remanufacturing, Army Academy of Armored Forces, Beijing 100072, China 苣 Corresponding author, E鄄mail:hitwyj@ 126. com ABSTRACT With the rapid development of precision guidance and radar detection technologies, radar absorbing materials have gained popularity. Traditional radar absorbing materials are limited because of a high density and narrow absorption band. To improve the absorption properties of traditional radar absorbing materials, developing radar absorbing material with thin鄄layer, light鄄weight, broadband and strong鄄absorbing is necessary. The effects of Co鄄doping on the structure, morphology, and microwave absorption proper鄄 ties of reduced graphene oxide (RGO) / Fe3O4 composites were studied in this paper. The RGO/ Fe3O4 and Co鄄doped RGO/ FeFe3O4 composites were prepared via a one鄄step hydrothermal method. The effects of Co on the microstructure, phase composition, and valence state of the composite were analyzed using scanning electron microscopy, X鄄ray diffractometry, and X鄄ray photoelectron spectroscopy. The relative complex permittivity and permeability of RGO/ Fe3O4 and Co鄄doped RGO/ Fe3O4 composites were within 2鄄鄄18 GHz, as re鄄 corded by a vector network analyzer. The influence of Co鄄doping on the microwave absorption property of RGO/ Fe3O4 was simulated. The results show that a part of Co participates in the hydrothermal reaction to form CoCO3 , Co3O4 , and Co2O3 , whereas some Co exists