Heteroatoms doped carbon materials are widely used in the advanced oxidation process (AOPs) to remove organic pollutants in water due to the synergies effect between different heteroatoms. In this study, a novel kind of N, S co-doped magnetic mesoporous carbon nanosheets (Fe@NS-C) was prepared by simple one-step pyrolysis. Further, the influence of doping amount of S (L-methionine) and N (melamine) on catalytic activity was studied, the optimized sample Fe@NS-C-2-12/PMS showed a satisfying degradation ( 91.07%) for high concentrations of tetracycline (80 mg/L TC) in 10 min, which was attributed to the proper ratio of S content to N content (S(at.%)/ N(at.%) = 0.2097) in the sample could better play its synergistic effect by XPS analysis. The Fe@NS-C-2-12/ PMS system also exhibited satisfactory degradation effects in a wide pH range (3−10) and the existence of inorganic ions and humic acid. Then, the degradation mechanisms were mainly through the non-radical pathway (¹O₂ and electron transfer) and the major active sites were pyridinic N compared to thiophene S, CO, and Fe-N_x. This study could inspire the design of high-performance active and low-cost heteroatomic doping nano-magnetic catalysts for PMS-based waste treatment.

由于不同杂原子之间的协同作用，杂原子掺杂碳材料广泛用于高级氧化工艺（AOPs）去除水中的有机污染物。在这项研究中，通过简单的一步热解制备了一种新型的 N、S 共掺杂磁性介孔碳纳米片（Fe@NS-C）。此外，研究了S（ L-蛋氨酸）和N（三聚氰胺）的掺杂量对催化活性的影响，优化后的样品Fe@NS-C-2-12/PMS在高浓度下表现出令人满意的降解（91.07%）四环素 (80 mg/L TC) 在 10 分钟内，这归因于 S 含量与 N 含量的适当比率 (S(at.%)/N(at.%) = 0.2097）通过XPS分析可以更好地发挥其协同作用。Fe@NS-C-2-12/PMS体系在较宽的pH范围（3-10）和无机离子和腐植酸的存在下也表现出令人满意的降解效果。然后，降解机制主要通过非自由基途径（¹ O ₂和电子转移），与噻吩S、CO和Fe-N _x相比，主要活性位点是吡啶N。这项研究可以启发设计用于基于 PMS 的废物处理的高性能活性和低成本杂原子掺杂纳米磁性催化剂。