The non-radical oxidation processes of persulfate activation by carbon materials have shown great potential for industrial and saline wastewater treatment. Recently, metal-organic frameworks (MOFs) as an emerging precursor have been widely used for fabricating functional carbon materials. Herein, we reported ZIF-8 derived defect-rich nitrogen-doped carbon (ZCNs) via NaCl-assisted pyrolysis for efficient non-radical activation of peroxydisulfate to degrade rhodamine B (RB). All samples exhibited excellent catalytic activity, and ZCN-900 (pyrolyzed at 900 °C) was found to be the most active, able to degrade 96 % of RB quickly within 10 min. Quenching tests and electron paramagnetic resonance (EPR) analyses suggested that the singlet oxygen (¹O₂) dominated the degradation process by a non-radical pathway. Furthermore, the effect of anions and water quality on RB oxidation were investigated, and ZCN-900/PDS system showed great resistance to the anions and natural organic matters (NOM). This work may provide a significant addition to MOF-based functional materials for environmental remediation based on the results above.

碳材料活化过硫酸盐的非自由基氧化过程在工业和含盐废水处理中显示出巨大的潜力。最近，金属有机框架（MOFs）作为一种新兴的前体已被广泛用于制造功能性碳材料。在此，我们报道了 ZIF-8 衍生的富含缺陷的氮掺杂碳 (ZCN) 通过 NaCl 辅助热解有效地非自由基活化过二硫酸盐以降解罗丹明 B (RB)。所有样品都表现出优异的催化活性，ZCN-900（900°C 热解）被发现是最活跃的，能够在 10 分钟内快速降解 96% 的 RB。淬火试验和电子顺磁共振 (EPR) 分析表明，单线态氧 ( ¹ O ₂) 通过非自由基途径主导降解过程。此外，研究了阴离子和水质对RB氧化的影响，ZCN-900/PDS体系对阴离子和天然有机物（NOM）表现出很强的抵抗力。基于上述结果，这项工作可能为基于 MOF 的功能材料用于环境修复提供重要的补充。