The magnetic metal-organic framework composite Fe₃O₄@Sn-MOF with core-shell structure was successfully prepared by hydrothermal synthesis. It was characterized by XRD, TEM, BET, DRS, FT-IR, XPS and VSM. The photocatalytic performance of the composite was evaluated by degradation of Acid Red 3R (AR3R) dye under simulated light source. Under the conditions that the additive amount of the catalyst was 6.7 g/L, the initial concentration of AR3R was 50 mg/L and the initial pH of AR3R was 3.0, Fe₃O₄@Sn-MOF revealed the optimized photocatalytic activity with 100% degradation efficiency of AR3R at 30 min. The excellent photocatalytic ability was mainly ascribed to the effective charge separation, strong photo-response and rich active sites. Besides, using Fe₃O₄ as the magnetic nucleus was conducive to improve the recovery rate of the catalyst. The EPR and free radical analysis indicate that •O₂⁻ and •OH played important roles in the photocatalytic reaction. Meanwhile, a possible degradation process and mechanism were proposed by the full band scanning of AR3R, 3D-EEM fluorescence analysis and electrochemical measurement.

通过水热合成成功地制备了具有核-壳结构的磁性金属-有机骨架复合Fe ₃ O ₄ @ Sn-MOF。通过XRD，TEM，BET，DRS，FT-IR，XPS和VSM对其进行表征。通过在模拟光源下降解酸性红3R（AR3R）染料来评估复合材料的光催化性能。在催化剂的添加量为6.7g / L的条件下，AR3R的初始浓度为50mg / L，且AR3R的初始pH为3.0，Fe ₃ O ₄@ Sn-MOF揭示了优化的光催化活性，在30分钟时AR3R的降解效率为100％。优异的光催化能力主要归因于有效的电荷分离，较强的光响应和丰富的活性中心。此外，使用Fe ₃ O ₄作为磁核有利于提高催化剂的回收率。该EPR和自由基分析表明•ø ₂ ^-和•OH的光催化反应中发挥了重要的作用。同时，通过AR3R的全波段扫描，3D-EEM荧光分析和电化学测量，提出了可能的降解过程和机理。