Cobalt sulfides as persulfate activator have received increasing interest in the field of persulfate-based advanced oxidation process. In this study, Co₉S₈ anchored in N, S, O heteroatoms co-doped carbon (CoSx@N-S-O-C) composite was prepared with different sulfur precursors (sulfur, thiourea, thiophene and benzyl disulfide), and used to activate peroxymonosulfate (PMS) for sulfamethoxazole (SMX) degradation. The effect of temperature, pH, inorganic ions, humic acids and water components on SMX degradation was investigated. The results showed that sulfur precursor could regulate the catalytic activity of the composite through changing the cobalt speciation and carbon structure. The catalytic activity was highest when the molar ratio of sulfur to cobalt was 5:1 (CoS_x@N-S-O-C-5). Sulfate radicals (dominant) and hydroxyl radicals contributed to SMX degradation. The intermediate products during SMX degradation were identified, and the possible pathway of SMX degradation was proposed. Pyridinic N, Co-N, cobalt, S^2-, S₂^2-, C-S-C and C-SO_x were active sites for PMS activation.

作为过硫酸盐活化剂的硫化钴在基于过硫酸盐的高级氧化工艺领域受到越来越多的关注。本研究以不同的硫前体（硫、硫脲、噻吩和二硫化苄）制备了锚定在 N、S、O 杂原子共掺杂碳（CoSx@NSOC）复合材料中的Co ₉ S ₈ ，并用于活化过一硫酸盐（PMS ) 用于磺胺甲恶唑 (SMX) 降解。研究了温度、pH、无机离子、腐殖酸和水成分对SMX降解的影响。结果表明，硫前驱体可以通过改变钴形态和碳结构来调节复合材料的催化活性。当硫与钴的摩尔比为 5:1 (CoS _x@NSOC-5）。硫酸根（主要）和羟基自由基导致 SMX 降解。鉴定了SMX降解过程中的中间产物，提出了SMX降解的可能途径。吡啶 N、Co-N、钴、S ^2-、S ₂ ^2-、CSC 和 C-SO _x是 PMS 活化的活性位点。