To decrease the adverse environmental and health-related effects of antibiotics, a series of MnFe₂O₄-Au (MFO-Au) composites were prepared by simple co-precipitation and photoreduction methods for efficient photo-Fenton degradation of tetracycline (TC). The synergistic effect of MFO and gold nanoparticles (AuNPs) with high absorption of visible light and strong photogenerated carrier separation efficiency endowed MFO-Au₃ an outstanding photo-Fenton catalytic performance for TC degradation in neutral condition. The surface hydroxyl of MFO profited to generation of •OH, and negative charged or partially polarized AuNPs benefited to adsorption of H₂O₂, which had a synergistic effect on enhancing the photo-Fenton catalytic performance of MFO-Au. 88.3% of TC was efficiently removed and about 51.9% of TOC decreased within 90 min. The electron spin resonance and quenching tests suggested that h⁺ and e^- were responsible for the high catalytic degradation and •OH and •O₂^- participated in the photo-Fenton reaction. The toxicity assessment by seed germination experiments showed efficient toxicity reduction of this system. Besides, MFO-Au exhibited high stability, good cycle, relatively economical and practical application performance, which is expected to provide potential guidance for the design and combination of noble nanoparticles with high stability and spinel bimetallic oxides with high catalytic activity in photo-Fenton reactions.

为了减少抗生素对环境和健康的不利影响，通过简单的共沉淀和光还原方法制备了一系列MnFe ₂ O ₄ -Au（MFO-Au）复合材料，以有效地通过光芬顿降解四环素（TC）。MFO和金纳米颗粒（AuNPs）的协同作用具有很高的可见光吸收率和很强的光生载流子分离效率，使MFO-Au ₃具有出色的光芬顿催化性能，可在中性条件下降解TC。MFO的表面羟基有利于生成•OH，带负电荷或部分极化的AuNPs有利于H ₂ O _2的吸附，对增强MFO-Au的光芬顿催化性能具有协同作用。在90分钟内有效去除了88.3％的TC，降低了约51.9％的TOC。该电子自旋共振和淬火测试表明使得h ⁺和e ^-分别负责高催化降解和•OH和•Ø ₂ ^-参加了光芬顿反应。通过种子发芽实验的毒性评估表明该系统有效降低了毒性。此外，MFO-Au具有较高的稳定性，良好的循环性，相对经济和实用的应用性能，有望为高稳定性的贵金属纳米颗粒与光芬顿反应中具有高催化活性的尖晶石双金属氧化物的设计和组合提供潜在的指导。 。