采用两步煅烧法成功制备了钴锰双金属氧化物负载的石墨相氮化碳(CMCN)。锰氧化物主要以Mn₃O₄和MnCO₃形式存在,钴氧化物以CoO形式存在。由于g-C₃N₄的存在,金属Mn和Co都分布均匀没有出现团聚现象。XPS表征结果表明,Co和Mn都具有2个价态存在于CMCN中,并且保持了g-C₃N₄的结构单元。通过对罗丹明B降解评估催化剂CMCN的催化降解性能。结果表明,在Mn和Co的协同作用下,罗丹明B降解率在1 min可达到99%以上。电子顺磁共振和淬灭试验表明,非自由基氧化(¹O₂)在罗丹明B降解过程中占主导地位。

Cobalt manganese oxides supported graphite phase carbon nitride (CMCN) is successfully prepared by two-step calcination method.Manganese oxides exist mainly in the form of Mn₃O₄ and MnCO₃,and cobalt oxides exist in the form of CoO.Due to the presence of g-C₃N₄,Mn and Co are uniformly distributed without agglomeration.It is indicated by XPS characterization that both Co and Mn have two valence states within CMCN,and the structural unit of g-C₃N₄ is remained in CMCN.The catalytic degradation performance of CMCN catalyst is evaluated through degradation of Rhodamine B.It is shown that under the synergistic action of Mn and Co,the degradation rate of Rhodamine B exceeds 99% in 1min.It is verified by electron paramagnetic resonance and quenching experiments that nonradical oxidation (¹O₂) dominates the degradation of Rhodamine B.

庄立恒(1999-),男,硕士生,研究方向为污水处理,13605211568@qq.com;毛辉麾(1981-),男,博士,副教授,研究方向为纳米功能材料,通讯联系人,maohuihui-beijing@126.com。