Co(CN)_(3)催化剂活化过氧单硫酸盐促进罗丹明B降解

Peroxymonosulfate Activation by Co(CN)_(3) Catalyst for the Boosted Degradation of Rhodamine B

钴基金属有机框架化合物是一种很有前途的催化剂.本文采用水热法制备了Co(CN)_(3)催化剂.结果表明,所合成的Co(CN)_(3)催化剂结晶性良好,其形貌为立方体.将该催化剂用于活化过氧单硫酸盐(PMS),可高效降解罗丹明B(RhB),且具有很好的活性稳定性,5次循环后RhB去除率仍为100%.最佳反应条件为:25℃,pH=7,催化剂浓度50 mg/L,PMS浓度0.02 mmol/L.单线态氧是反应过程中最重要的活性物种,反应遵循非自由基机理,溶液的pH值和离子对活性影响较小,对RhB表现出较好的选择性.

Cobalt-based metal-organic framework compounds are promising catalysts.In this study,Co(CN)_(3) catalyst was synthesized using a hydrothermal method.The results indicate that the synthesized Co(CN)_(3) catalyst exhibits good crystallinity.The results of SEM show that the morphology of Co(CN)_(3) is cubic.When the catalyst is used to activate peroxymonosulfate(PMS),it can efficiently degrade Rhodamine B(RhB)and demonstrates excellent catalytic stability,with a RhB removal rate of 100%even after five cycles.The optimal reaction conditions are as follows:25℃,pH=7,catalyst concentration of 50 mg/L,and PMS concentration of 0.02 mmol/L.Singlet oxygen is the most important reactive species during the reaction,which follows a non-radical mechanism.The pH value of the solution and ions have a minimal impact on activity,while showing good selectivity towards RhB.