Study on the Preparation and Performance of Bimetallic MOFs Microwave Absorbing Materials

金属–有机框架(Metal-Organic Frameworks, MOFs)是一种有效的吸波材料，其中双金属的协同作用有益于提高材料的吸波性能。本文利用溶液法制备了以2-甲基咪唑为有机配体的具有较稳定吸收带宽的CoNi/C微波吸收材料。在与30%石蜡混合下制样，对该材料微波吸收开展研究。调控金属比例，探究金属掺杂量以及不同热解温度对材料吸波性能的影响。采用扫描电子显微镜对样品形貌进行表征发现在热解温度为700℃下有较规则形貌，在2~18 GHz的频率范围测试样品的微波吸收性能，解析其相关性能。Metal-Organic Frameworks (MOFs) are effective wave-absorbing materials, and the synergistic effect of bimetallic components is beneficial for enhancing their microwave absorption performance. In this study, a CoNi/C microwave-absorbing material with a relatively stable absorption bandwidth was synthesized via a solution method using 2-methylimidazole as the organic ligand. Samples were prepared by mixing the material with 30% paraffin, and their microwave absorption properties were investigated. The effects of metal ratio, doping amount, and pyrolysis temperature on the material’s absorption performance were explored. Scanning electron microscopy (SEM) characterization revealed that the sample pyrolyzed at 700˚C exhibited a more regular morphology. The microwave absorption performance of the samples was tested in the 2~18 GHz frequency range, and the related properties were analyzed.