Improving the efficiency of photo-induced carriers (e^-/h⁺) is one of the most effective routes to accelerate the heterogeneous photo-Fenton process. Herein, inspired by inverse Lorentz forces of opposite charges in a magnetic field, an external magnetic field intensified photo-Fenton catalysis for norfloxacin (NOR) degradation was constructed under visible light irradiation. The reduced graphene oxide-supported Fe-Cu bimetal (FeCu/rGO), obtained by employing common iron powder as a reducing agent, was served as a model catalyst. Impressively, the intensities of both carriers and radicals (•OH and •O₂^-/•HO₂) were increased after the normal photo-Fenton reactor was placed into two fixed permanent magnets ($$200 mT), leading to a 34.1% improvement in NOR removal. Meanwhile, the consumption of H₂O₂ was also critically boosted (from 65.1% to 92.1%). Combined with theoretical studies, the enhanced radicals were not only resulted from accelerated carrier separation but also extended O-O and O-H bonds in H₂O₂ and facilitated spin evolutions of ¹[HO•↑···↓•OH] → ³[HO•↑···↑•OH] and ¹[HOO•↑···↓•H] → ³[HOO•↑···↑•H]. This study offers an insight into the specific role of an external magnetic field in promoting heterogeneous photo-Fenton catalysis.

提高光致载流子的效率（E ^- / H ⁺）是最有效的途径，以加速非均相光芬顿处理中的一个。在此，受磁场中相反电荷的逆洛伦兹力的启发，在可见光照射下构建了外部磁场增强的诺氟沙星（NOR）降解的光芬顿催化。通过使用普通铁粉作为还原剂获得的还原氧化石墨烯负载的Fe-Cu双金属（FeCu / rGO），被用作模型催化剂。令人印象深刻的，两个载波和自由基的强度（•OH和•ö ₂ ^- /•HO ₂）正常光芬顿反应器放置成两个固定的永久磁铁后增加（$$200 mT），从而使NOR去除率提高了34.1％。同时，H ₂ O ₂的消耗量也从65.1％大幅提高到92.1％。结合理论研究，增强的自由基不仅是由于加速载流子分离引起的，而且还扩展了H ₂ O _2中的OO和OH键，并促进了¹ [HO•↑···↓•OH]→ ³ [HO• ↑···↑·OH]和¹ [HOO·↑···↓·H]→ ³ [HOO·↑···↑•H]。这项研究提供了对外部磁场在促进多相光芬顿催化中特定作用的见解。