Abstract High efficient MIL-53(Fe) derived γ-Fe2O3 coated by carbon framework (MCC for short) and compound with reduced graphene oxide for broadband microwave absorption is prepared by facile hydrothermal method and gradient temperature calcination. The sheets/bowknot-shaped nanoparticles structure have better microwave absorption performance via uniting magnetic γ-Fe2O3 core, carbon skeleton and rGO sheets. Binary material calcined at 600°C has an optimal RL value −62.53dB under 2.66mm thickness. In addition, the ternary MCC/rGO of 700°C calcination has better performance with an 11.68GHz effective absorption bandwidth (from 6.32GHz to 18GHz) of a single thickness of 3.60mm, and a maximum RL of −43.13dB at 3.25mm thickness. The MOF framework enhances particle stability and internal scattering, while graphene provides a larger absorption surface, coupled with the good impedance matching rooted in suitable permittivity and permeability, the material is an ideal new type of absorbing material.

中文翻译：

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MIL-53(Fe) 衍生的 MCC/rGO 纳米粒子，具有优异的宽带微波吸收特性

摘要 采用简便的水热法和梯度温度煅烧，制备了高效的MIL-53(Fe)衍生γ-Fe2O3，由碳骨架（简称MCC）和还原氧化石墨烯复合物包覆，用于宽带微波吸收。通过将磁性γ-Fe2O3核、碳骨架和rGO片结合在一起，片/蝴蝶结形纳米颗粒结构具有更好的微波吸收性能。在 600°C 煅烧的二元材料在 2.66mm 厚度下具有最佳 RL 值 -62.53dB。此外，700°C煅烧的三元MCC/rGO具有更好的性能，11.68GHz的有效吸收带宽（从6.32GHz到18GHz）3.60mm的单层厚度，3.25mm厚度的最大RL为-43.13dB . MOF 框架增强了粒子稳定性和内部散射，而石墨烯提供了更大的吸收表面，