Facile fabrication of magnetic metal-organic frameworks (MOFs) using a direct epitaxial approach for eliminating arsenic from water is highly desirable. Herein, a two-step solvothermal method of elegant design is proposed to synthesize Fe₃O₄@UiO-66. Such resulting composite was systematically characterized using powder X-ray diffraction (PXRD), Fourier transform infrared (FTIR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), N₂ adsorption-desorption isotherms, and thermogravimetric analysis (TGA). Results clearly reveal that this novel composite exhibits a unique core-shell structure with high specific surface area and plentiful micropores as well as good thermal stability. Specifically, batch adsorption data for arsenate demonstrate that a pseudo-second order kinetic model (R² = 0.9996) better describes this adsorption process than a pseudo-first order model (R² = 0.8582), revealing the chemical interaction between the composite and arsenate. The Freundlich model with better coefficient (R² = 0.9566) further verified multi-layer heterogeneous adsorption, which may be ascribed to the unique core-shell structure of this composite (Fe₃O₄@UiO-66). Its excellent adsorption performance for arsenate (73.2 mg (As) g⁻¹ (adsorbent)) is comparable to most MOFs-containing adsorbents but is also magnetic, allowing for ready separation of the composite from aqueous solution. Given this combination of qualities, this new composite could offer a promising alternative for wastewater remediation.

非常需要使用直接外延方法从水中消除砷的磁性金属有机骨架（MOF）的简便制造方法。本文提出了一种优雅设计的两步溶剂热法合成Fe ₃ O ₄ @ UiO-66。使用粉末X射线衍射（PXRD），傅立叶变换红外（FTIR），扫描电子显微镜（SEM），透射电子显微镜（TEM），N _2对所得的复合材料进行系统表征。吸附-解吸等温线和热重分析（TGA）。结果清楚地表明，这种新型复合材料具有独特的核-壳结构，具有高比表面积和丰富的微孔以及良好的热稳定性。具体而言，砷酸盐的批次吸附数据表明，拟二级动力学模型（R ²  = 0.9996） 比拟一级化学模型（R ² = 0.8582）更好地描述了该吸附过程，从而揭示了复合物与砷酸盐之间的化学相互作用。 。具有更好系数（R ²  = 0.9566）的Freundlich模型进一步验证了多层非均相吸附，这可能归因于这种复合材料（Fe₃ O ₄ @ UiO-66）。它对砷酸盐的优异吸附性能（73.2 mg（As）g ^-1（吸附剂））可与大多数含MOF的吸附剂媲美，但它还是磁性的，可轻松从水溶液中分离出复合材料。考虑到这些特性的结合，这种新的复合材料可以为废水修复提供有前途的替代方法。