In this work, new covalent organic framework (COF) materials with high crystallinity and large specific surface areas were used as cobalt-loaded supports. Cobalt nanoparticle-embedded nitrogen-doped carbon porous catalysts (Co@COF) were obtained by high-temperature pyrolysis of the COF materials and cobalt salts. With multiple active sites (Co⁰, pyridine N, and graphitic N), Co@COF exhibited superior catalytic properties for peroxymonosulfate (PMS) activation toward the degradation of sulfamerazine (SMZ). The efficiency of SMZ degradation reached 92.4 % within 10 min and the total organic carbon (TOC) removal rate reached 70.3 % within 30 min. Using radical quenching experiments and electron paramagnetic resonance (EPR) analysis, sulfate radicals (SO₄^•−), hydroxyl radicals (^•OH), and singlet oxygen (¹O₂) were identified in this system, while ¹O₂ was the dominant active species for SMZ removal. The degradation intermediates of SMZ in Co@COF/PMS were monitored by high performance liquid chromatography–time of flight mass spectrometry (HPLC–TOFMS).

在这项工作中，具有高结晶度和大比表面积的新型共价有机骨架（COF）材料被用作载钴载体。通过COF材料和钴盐的高温热解获得钴纳米颗粒嵌入的氮掺杂碳多孔催化剂（Co@COF）。Co@COF具有多个活性位点（Co ⁰、吡啶 N 和石墨 N），在过氧单硫酸盐（PMS）活化对磺胺嘧啶（SMZ）降解方面表现出优异的催化性能。SMZ降解效率在10分钟内达到92.4%，总有机碳(TOC)去除率在30分钟内达到70.3%。使用自由基猝灭实验和电子顺磁共振 (EPR) 分析，硫酸根 (SO ₄ ^•−)、羟基自由基( ^• OH) 和单线态氧( ¹ O ₂ ) 在该系统中被识别出来，而¹ O ₂是去除SMZ 的主要活性物质。通过高效液相色谱-飞行时间质谱 (HPLC-TOFMS) 监测 SMZ 在 Co@COF/PMS 中的降解中间体。