在花状球体氮化碳(FSCN)上掺杂钴金属制备出高效稳定的Co-FSCN催化剂。利用XRD、BET、SEM、XPS对催化剂进行表征,并探究不同条件对磺胺二甲基嘧啶(sulfamethazine,SMZ)降解效果的影响。结果表明,用Co-FSCN(0.1 g/L)活化过单硫酸盐(PMS)(0.163 mmol/L),在初始溶液pH 7的情况下2 min内对SMZ(20 mg/L)的降解率超过98%。自由基淬灭实验证明,Co-FSCN/PMS体系中自由基途径与非自由基途径共存,羟基自由基(·OH)、超氧自由基(·O^2-)与单线态氧(¹O₂)均是参与SMZ降解的主要活性物种。Co-FSCN循环使用3次后仍表现出良好的稳定性。

A promising efficient and stable Co-FSCN catalyst is prepared by doping cobalt onto flower-shaped carbon nitride (FSCN),and characterized by means of XRD,BET,SEM,and XPS.The effects of different conditions on the degradation of sulfamethazine are investigated.It is indicated that the degradation efficiency of 20 mg·L^-1 sulfamethazine in the initial pH=7 solution exceeds 98% within 2 minutes when 0.1 g·L^-1 Co-FSCN activated 0.163 mmol·L^-1 peroxymonosulfate (PMS) is served.The free radical quenching experiment proves that the radical pathway and non-radical pathway coexist in the Co-FSCN/PMS system.Hydroxyl radicals (·OH),superoxide radicals (·O^2-),and singlet oxygen (¹O₂) are the main active species involved in the degradation of sulfamethazine.After three cycles of Co-FSCN,the catalyst exhibits good stability.

张荣哲(1998-),男,硕士研究生,研究方向为水污染控制,220192223044@ncepu.edu.cn。