Exploring catalyst materials which are advancing, recyclable and with high catalytic performances to remove persistent organic pollutants such as Quinclorac (QNC) is important. In this work, a novel N-doped carbon support CoFe₂O₄/Fe⁰ hybrid catalyst (CFO/Fe@C) was in situ formed by a simple co-precipitation and calcination process. Fine intergrowth crystal CoFe₂O₄ and Fe⁰ were uniformly dispersed on the N-doped porous carbon that derived from the raw material Ethylene Diamine Tetraacetic Acid (EDTA), which also provided chelating effect to prevent the agglomeration of the metals. Interestingly, the Fe⁰ could only be formed with the presence of cobalt, possibly due to the increased reduction property resulted from the particle refinement. The as-formed Fe⁰ could not only activate the peroxymonosulfate (PMS) but also reduce the Co³⁺, resulting in a synergistic impact to remarkably enhance the degradation performance. Besides, the N-doped porous carbon can also benefit the degradation of pollutant by strengthening the electron transfer. A good degradation efficiency of QNC was obtained in CFO/Fe@C-PMS system and most of the QNC had been degraded to carbon dioxide, water and other small molecular organisms. The removal rate remained over 70% after four reuses and the material could be easily recovered from the solution due to the good magnetic properties. Therefore, the as-prepared CFO/Fe@C catalyst should be an ideal catalyst for the removal of organic pollutants.

探索具有先进性、可回收性和高催化性能的催化剂材料以去除持久性有机污染物，如 Quinclorac (QNC) 是很重要的。在这项工作中，通过简单的共沉淀和煅烧过程原位形成了一种新型的 N 掺杂碳载体 CoFe ₂ O ₄ /Fe ⁰混合催化剂（CFO/Fe@C）。细小的共生晶体CoFe ₂ O ₄和Fe ⁰均匀地分散在以乙二胺四乙酸(EDTA)为原料的N掺杂多孔碳上，这也提供了螯合作用以防止金属团聚。有趣的是，Fe ⁰只能在钴的存在下形成，可能是由于颗粒细化导致还原性能增加。形成的 Fe ⁰不仅可以激活过硫酸盐 (PMS)，还可以还原 Co ³⁺，产生协同作用，显着提高降解性能。此外，N掺杂的多孔碳还可以通过加强电子转移来促进污染物的降解。在CFO/Fe@C-PMS体系中获得了较好的QNC降解效率，大部分QNC已经降解为二氧化碳、水和其他小分子生物。4 次重复使用后，去除率保持在 70% 以上，由于良好的磁性能，材料可以很容易地从溶液中回收。因此，所制备的 CFO/Fe@C 催化剂应该是去除有机污染物的理想催化剂。