In this study, we firstly used the MOF-derived Fe₇S₈/C rod-like composites as absorbers and systematically investigated the synergistic effect of Fe₇S₈ and carbon in electromagnetic wave absorption applications. By controlling the introduced dosage of ferric salt, the proportion of carbon and Fe₇S₈ in composites could be adjusted, which made a significant effect on the electromagnetic parameters and absorption performance. When the carbon proportion was about 33.9 wt%, the synergistic effect between Fe₇S₈ and carbon guaranteed the optimized impedance matching and strong dissipation ability, presenting superb absorption performance. The optimal performance reflected in the minimum reflection loss of −68.86 dB at 12.08 GHz with a thickness of 1.67 mm, and the effective bandwidth was up to 4.56 GHz at 1.45 mm. Therefore, this study provides a facile method for preparing the Fe₇S₈/C absorbers and emphasizes the significance of the ratios between Fe₇S₈ and carbon on the electromagnetic parameters and absorption performance.

在这项研究中，我们首先使用MOF衍生的Fe ₇ S ₈ / C棒状复合材料作为吸收剂，并系统地研究了Fe ₇ S ₈和碳在电磁波吸收应用中的协同作用。通过控制铁盐的加入量，可以调节碳和Fe ₇ S ₈在复合材料中的比例，这对电磁参数和吸收性能有显着影响。当碳含量为约33.9重量％时，Fe ₇ S ₈之间的协同作用碳保证了最佳的阻抗匹配和强大的耗散能力，具有出色的吸收性能。最佳性能体现在厚度为1.67 mm的12.08 GHz处的最小反射损耗为−68.86 dB，而在1.45 mm处的有效带宽高达4.56 GHz。因此，本研究提供了一种制备Fe ₇ S ₈ / C吸收剂的简便方法，并强调了Fe ₇ S ₈与碳之比对电磁参数和吸收性能的重要性。