Co3O4/Biomass-rGO异质结构纳米片的微波吸收性能  

Microwave Absorption Properties of Co3O4/Biomass-rGO Heterostructure Nanosheets

作　　者：张德庆[1] 刘婷婷[1] 张慧斌 程俊业 曹茂盛[3] ZHANG De-qing;LIU Ting-ting;ZHANG Hui-bin;CHENG Jun-ye;CAO Mao-sheng(Qiqihar University,Qiqihar 161006,China;Shenzhen University,Shenzhen 518060,China;Beijing Institute of Technology,Beijing 100081,China)

机构地区：[1]齐齐哈尔大学,黑龙江齐齐哈尔161006 [2]深圳大学,广东深圳518060 [3]北京理工大学,北京100081

出　　处：《表面技术》2020年第2期56-60,74,共6页Surface Technology

基　　金：国家自然科学基金（51272110,51772160）;齐齐哈尔大学研究生创新基金（YJSCX2018-037X)~~

摘　　要：目的调节Co3O4纳米粒子的电磁匹配,以实现最佳的电磁波吸收性能,同时实现对轻质、强吸收、宽频带、小厚度电磁波吸收材料的追求。方法通过玉米秸秆制备生物质-rGO,采用水热法将生物质-rGO引入到Co3O4纳米粒子中制备具有异质结构的Co3O4/biomass-rGO纳米片。通过X射线衍射分析仪、透射电子显微镜、高分辨透射电子显微镜测试,分别对Co3O4/biomass-rGO异质结构纳米片的组成、形貌以及结构进行表征,同时通过矢量网络分析仪测试分析生物质-rGO的引入对Co3O4/biomass-rGO异质结构纳米片吸波性能的影响。结果生物质-rGO的引入明显提高了Co3O4/biomass-rGO异质结构纳米片在2~18 GHz频率范围的电磁波吸收性能,不仅降低了有效吸收体厚度,同时还拓展了有效吸收频带宽度。在厚度为1.5 mm、频率为15.8 GHz时,达到–36.1 dB的最大反射损耗值。有效吸收频带宽度为15 GHz,在S、C、X、Ku波段均存在有效吸收,实现了在1.0~5.5 mm宽厚度范围内的全部有效吸收。结论通过引入生物质-rGO可以有效改善Co3O4的电磁匹配和介电损耗。The paper aims to adjust the electromagnetic matching of Co3O4 nanoparticles to achieve the best electromagnetic wave absorption performance,and obtain electromagnetic wave absorbing materials of lightweight,strong absorption,broadband and small thickness.The biomass-rGO was prepared from corn stover,and then the biomass-rGO was introduced into the Co3O4 nanoparticles by the hydrothermal method to prepare a Co3O4/biomass-rGO nanosheet of heterostructure.The composition,morphology and structure of Co3O4/biomass-rGO heterostructure nanosheets were characterized by X-ray diffraction analyzer,transmission electron microscopy and high resolution transmission electron microscopy.At the same time,the influence of introducing biomass-rGO on the absorbing properties of Co3O4/biomass-rGO heterostructure nanosheets was analyzed by a vector network analyzer.The introduction of biomass-rGO significantly improved the electromagnetic wave absorption performance of Co3O4/biomass-rGO heterostructure nanosheets in the frequency range of 2~18 GHz,which not only reduced the effective absorber thickness,but also expanded the effective absorption frequency bandwidth.A maximum reflection loss value of–36.1 dB was achieved at a thickness of 1.5 mm and a frequency of 15.8 GHz.The effective absorption frequency bandwidth was 15 GHz,and there was effective absorption in the S,C,X,and Ku bands,and all effective absorption in a wide thickness range of 1.0 to 5.5 mm was achieved.It turns out that the introduction of biomass-rGO can effectively improve the electromagnetic matching and dielectric loss of Co3O4.

关 键 词：Co3O4纳米粒子 生物质-rGO 异质结构 宽频带 微波吸收 

分 类 号：TB33[一般工业技术—材料科学与工程]