用于高效微波吸收的3D多孔异质界面型NiCo_(2)(CO_(3))_(3)/RGO气凝胶  

3D porous NiCo_(2)(CO_(3))_(3)/reduced graphene oxide aerogel with heterogeneous interfaces for high-efficiency microwave absorption

作　　者：武丹丹 张含笑 王政炎 张妍兰 王永祯[1,2] WU Dan-dan;ZHANG Han-xiao;WANG Zheng-yan;ZHANG Yan-lan;WANG Yong-zhen(College of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Shanxi Joint Laboratory of Coal based Solid Waste Resource Utilization and Green Ecological Development,Taiyuan 030024,China)

机构地区：[1]太原理工大学材料科学与工程学院,山西太原030024 [2]山西省煤基固废资源化利用与绿色生态发展联合实验室,山西太原030024

出　　处：《新型炭材料（中英文）》2023年第6期1035-1049,共15页New Carbon Materials

基　　金：中央引导地方科技发展资金项目(YDZJSX2022B003);山西省科技重大专项计划项目(202101120401008);山西省重点研发计划项目(202102030201006);山西省自然科学基金项目(202203021212205);山西省高等学校科技创新项目(2022L074).

摘　　要：创新的微观结构设计和合适的多组分策略对于具有强吸收和宽有效吸收频带(EAB)的先进电磁吸波材料(EAM)仍然具有挑战性。本文采用简单的水热还原法制备了自组装的3D网络结构NiCo_(2)(CO_(3))_(3)/RGO(NCR)气凝胶。独特的微观结构和多组分不仅解决了NiCo_(2)(CO_(3))_(3)颗粒的物理团聚,而且可以调整电磁参数以提高阻抗匹配和衰减能力。界面基体和宏观3D互联网格结构的协同效应可以实现高电磁波吸收(EMA)性能,在2.3 mm处最小反射损耗(RLmin)值为-58.5 dB,EAB为6.5 GHz。NiCo_(2)(CO_(3))_(3)/RGO气凝胶优异的EMA性能可归因于3D多孔结构的多重反射、散射和弛豫过程以及界面基体的强界面极化。Advanced electromagnetic absorbing materials(EAMs)with strong absorption and a wide effective absorption band-width(EAB),using innovative microstructural design and suitable multicomponents remain a persistent challenge.Here,we report the production of a material by the hydrothermal reduction of a mixture of graphene oxide(GO),Ni(NO_(3))_(2)·6H_(2)O,and Co(NO_(3))_(2)·6H_(2)O,resulting in reduced GO(RGO)with a self-assembled 3D mesh structure filled with NiCo_(2)(CO_(3))_(3).The unique mi-crostructure of this assembly not only solves the problem of NiCo_(2)(CO_(3))_(3)particles agglomerating but also changes the electromagnet-ic parameters,thereby improving the impedance matching and attenuation ability.High electromagnetic wave absorption(EMA)was achieved by combining the 3D interconnected mesh structure and the various interfaces between NiCo_(2)(CO_(3))_(3)and RGO.The minim-al reflection loss(RLmin)was-58.5 dB at 2.3 mm,and the EAB was 6.5 GHz.The excellent EMA performance of the aerogel can be attributed to the multiple reflection,scattering,and relaxation process of the porous 3D structure as well as the strong polarization of the interfacial matrix.n of the interfacial matrix.

关 键 词：NiCo_(2)(CO_(3))_(3)/RGO气凝胶 结构设计 界面极化 微波吸收 

分 类 号：TB33[一般工业技术—材料科学与工程]