In this study, a facile hydrothermal method was used to prepare Fe₃O₄/MIL-101 composite as a photocatalyst. The resulting composite was characterized using X-ray diffraction, scanning electron microscopy, nitrogen adsorption/desorption isotherms, thermal analysis, X-ray photoelectron spectroscopy, and UV–Vis diffuse reflection spectroscopy. The Fe₃O₄/MIL-101 composite possesses a large surface area and mesoporous structure and exhibits a good photocatalytic activity for the MB degradation in the visible light region. A kinetic model for dye degradation over this heterogeneous catalyst was proposed by combining the parameters of the Langmuir isotherms and the kinetics of the unimolecular reaction. The proposed model fixes well with the experimental data. The mechanism of MB photocatalytic degradation is also addressed. The catalyst is stable after three recycles, which makes it a potential candidate for environmental restoration.

本研究采用简便的水热法制备了Fe ₃ O ₄ / MIL-101复合材料作为光催化剂。使用X射线衍射，扫描电子显微镜，氮吸附/解吸等温线，热分析，X射线光电子能谱和UV-Vis漫反射光谱来表征所得的复合材料。铁₃ O ₄/ MIL-101复合材料具有较大的表面积和中孔结构，并且对于可见光区域的MB降解表现出良好的光催化活性。结合朗缪尔等温线的参数和单分子反应的动力学，提出了一种在这种非均相催化剂上染料降解的动力学模型。所提出的模型与实验数据吻合得很好。MB的光催化降解机理也得到了解决。该催化剂在三个循环后稳定，这使其成为环境修复的潜在候选者。