In this study, new ternary magnetic MIL-101(Cr)/RGO/ZnFe₂O₄ catalyst (with 30% wt of ZnFe₂O₄) was synthesized via a hydrothermal route for sonodegradation of organic dyes. The structural, optical and magnetic properties of the nanocomposite were detected by means of X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), UV-visible spectroscopy (UV-visible), field emission scanning electron microscopy (FESEM), energy dispersive X-ray (EDX) spectroscopy, vibrating sample magnetometer (VSM), atomic force microscopy (AFM), Raman spectroscopy and BET surface area analysis. To evaluate the sonocatalytic activity of the as-prepared MIL-101(Cr)/RGO/ZnFe₂O₄ nanocomposite, the H₂O₂-assisted degradation of organic dyes such as congo red (CR), methylene blue (MB), Rhodamine B (RhB) and methyl orange (MO) in aqueous solution was studied under ultrasound irradiation. The obtained results indicated that the ternary MIL-101(Cr)/RGO/ZnFe₂O₄ nanocomposite had better performance for sonodegradation of these dyes than MIL-101(Cr)/RGO, pure MIL-101(Cr) or ZnFe₂O₄. The enhanced sonocatalytic performance of the as-prepared ternary nanocomposite could be attributed to the fast generation and separation of charge carriers (electrons and holes) in ZnFe₂O₄and MIL-101(Cr) and their transfer to the surface of graphene sheets. Moreover, the relatively high specific surface area of the MIL-101(Cr)/rGO and magnetic property of ZnFe₂O₄ improve the degradation efficiency of the dyes. The recovery of the ternary magnetic sonocatalyst from treated water could be easily achieved using an external magnetic field. The main influence factors on the sonocatalytic activity such as catalyst dosage and dye initial concentration were also investigated. The trapping experiments indicated that ^•OH radicals are the prominent active species in dye degradation. In addition, the reusability test, was also carried out to ensure the stability of the employed sonocatalyst.

在这项研究中，新的三元磁性MIL-101（Cr）/ RGO / ZnFe ₂ O ₄催化剂（含ZnFe ₂ O _4的重量百分比为30％）是通过水热途径合成的，用于有机染料的阳极氧化。通过X射线衍射（XRD），傅立叶变换红外光谱（FTIR），紫外可见光谱（UV-visible），场发射扫描电子显微镜（FESEM）检测纳米复合材料的结构，光学和磁性能量色散X射线（EDX）光谱，振动样品磁力计（VSM），原子力显微镜（AFM），拉曼光谱和BET表面积分析。评价所制备的MIL-101（Cr）/ RGO / ZnFe ₂ O ₄的声催化活性在超声辐照下，研究了纳米复合材料在水溶液中H ₂ O ₂辅助降解诸如刚果红（CR），亚甲基蓝（MB），若丹明B（RhB）和甲基橙（MO）等有机染料的过程。所得结果表明，三元MIL-101（Cr）/ RGO / ZnFe ₂ O ₄纳米复合材料具有比MIL-101（Cr）/ RGO，纯MIL-101（Cr）或ZnFe ₂ O更好的阳极氧化性能。₄。制备的三元纳米复合材料增强的声催化性能可归因于ZnFe ₂ O ₄中电荷载流子（电子和空穴）的快速生成和分离。和MIL-101（Cr）及其转移到石墨烯片的表面。此外，MIL-101（Cr）/ rGO的相对较高的比表面积和ZnFe ₂ O _4的磁性能提高了染料的降解效率。使用外部磁场可以很容易地从处理过的水中回收三元磁性声催化剂。还研究了影响声催化活性的主要因素，如催化剂用量和染料初始浓度。捕集实验表明^• OH自由基是染料降解中的主要活性物质。另外，还进行了可重复使用性测试，以确保所用声催化剂的稳定性。