The incorporation of metal-organic frameworks (MOFs) and subsequent high-temperature treatment to form derived carbon composite materials represents a promising research direction for tuning the electromagnetic wave absorption performance of composite materials. In this study, ZnFeO@Zn-MOF was synthesized using sol-gel and in-situ growth methods, and a tunable carbon content porous ZnFeO@ZnO/C composite material was prepared by varying the heat treatment temperature under an Ar atmosphere. The formation of MOF derived carbon enhanced the dielectric loss capability of the material, thereby optimizing the impedance matching of the composite and improving its electromagnetic wave attenuation capacity, ultimately leading to improved absorbing performance. The ZnFeO@ZnO/C composite material treated at 800 °C exhibited the most outstanding absorption performance, achieving a reflection loss of −50.89 dB at a frequency of 11.8 GHz and an effective absorption bandwidth of 3.588 GHz with a thickness of 1.6 mm, demonstrating excellent electromagnetic wave absorption capability.

中文翻译：

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MOF衍生多孔碳调控ZnFe2O4@ZnO电磁波吸收性能及机理

掺入金属有机框架（MOF）并随后进行高温处理形成衍生的碳复合材料代表了调节复合材料电磁波吸收性能的一个有前途的研究方向。本研究采用溶胶-凝胶和原位生长方法合成了ZnFeO@Zn-MOF，并通过在Ar气氛下改变热处理温度制备了碳含量可调的多孔ZnFeO@ZnO/C复合材料。 MOF衍生碳的形成增强了材料的介电损耗能力，从而优化了复合材料的阻抗匹配并提高了其电磁波衰减能力，最终提高了吸波性能。在800℃下处理的ZnFeO@ZnO/C复合材料表现出最出色的吸收性能，在11.8GHz频率下实现了-50.89dB的反射损耗，在1.6mm的厚度下实现了3.588GHz的有效吸收带宽，表明优良的电磁波吸收能力。