源自ZIF-L@ZIF-67的共掺杂多孔碳/碳纳米管异质结构用于高效微波吸收

Suppr 超能文献

核心技术专利：CN118964589B侵权必究

Suppr 超能文献

核心技术专利：CN118964589B侵权必究

He Liming, Xu Hongda, Cui Yang, Qi Jian, Wang Xiaolong, Jin Quan

The Key Laboratory of Automobile Materials (Ministry of Education), School of Materials Science and Engineering, Jilin University, 5988 Renmin Street, Changchun 130022, China.

State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun 130012, China.

Molecules. 2024 May 21;29(11):2426. doi: 10.3390/molecules29112426.

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.

源自金属有机框架（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为前驱体获得了叶状共掺杂多孔碳/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。当加入2 mmol的ZIF-67时，可获得-42.2 dB的最佳反射损耗。在厚度为2.2 mm、填料重量为12%的情况下，有效吸收带宽（EAB）达到4.8 GHz。优异的微波吸收（MA）能力源于中孔结构、均匀的异质界面和高传导损耗。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导。