Co_3O_4@C异相催化过硫酸氢钾降解罗丹明6G

Heterogeneous Activation of Peroxymonosulfate by Co_3O_4@C for the Degradation of Rhodamine 6G

采用氯化钴和多壁碳纳米管(CNTs)制备了Co_3O_4@C,并利用其催化过硫酸氢钾(PMS)降解染料罗丹明6G。采用扫描电镜(SEM)、红外光谱(FTIR)和X射线衍射仪(XRD)对Co_3O_4@C的结构进行表征。实验结果表明:当溶液初始pH为6. 5,Co_3O_4@C投加量为0. 1 g/L,PMS浓度为0. 5 mmol/L时,反应120分钟后5mg/L罗丹明6G的降解率可达96. 1%。自由基猝灭实验结果表明硫酸根自由基(SO_4^-·)和单线态氧(~1O_2)是Co_3O_4@C/PMS体系中的主要氧化物种。Co_3O_4@C具有良好的稳定性和循环利用效能。

Co3O4@C was prepared with cobalt chloride andCNTs,and it was used to activate PMS to degrade Rhodamine 6G. The structures and morphology of Co3O4@C were investigated by SEM,FTIR,and XRD. The experimental results showed that when solution initial p H value was 6. 5,the degradation efficiency of 5 mg/L Rhodamine 6G could reach 96. 1% within 120 minutes using 0. 1 g/L Co3O4@C and 0. 5 mmol/L PMS. Sulfate radical and singlet oxygen were identified as the dominating reactive species in Co3O4@C/PMS systems through radical quenching experiments. The as prepared Co3O4@C microparticles exhibited sound stability and reusability.