PDF(Pubmed)
Abstract：
Carbon-based magnetic metal composites derived from metal-organic frameworks (MOFs) are promising materials for the preparation of broadband microwave absorbers. In this work, the leaf-like co-doped porous carbon/carbon nanotube heterostructure was obtained using ZIF-L@ZIF-67 as precursor. The number of carbon nanotubes can be controlled by varying the amount of ZIF-67, thus regulating the dielectric constant of the sample. An optimum reflection loss of -42.2 dB is attained when ZIF-67 is added at 2 mmol. An effective absorption bandwidth (EAB) of 4.8 GHz is achieved with a thickness of 2.2 mm and a filler weight of 12%. The excellent microwave absorption (MA) ability is generated from the mesopore structure, uniform heterogeneous interfaces, and high conduction loss. The work offers useful guidelines to devise and prepare such nanostructured materials for MA materials.
摘要：
源自金属有机骨架（MOF）的碳基磁性金属复合材料是制备宽带微波吸收剂的有前途的材料。在这项工作中,以ZIF-L@ZIF-67为前驱体,得到叶状共掺杂多孔碳/碳纳米管异质结构。碳纳米管的数量可以通过改变ZIF-67的量来控制,从而调节样品的介电常数。当ZIF-67以2mmol加入时,获得-42.2dB的最佳反射损耗。以2.2mm的厚度和12%的填料重量实现4.8GHz的有效吸收带宽(EAB)。优异的微波吸收（MA）能力是由中孔结构产生的，统一的异构接口，和高传导损耗。这项工作为设计和制备用于MA材料的此类纳米结构材料提供了有用的指南。
