N-TiO2协同单过硫酸氢钾光催化降解氧氟沙星的研究

Photocatalytic Degradation of OFX Wastewater by N-TiO2 Assisted PMS

分别以尿素、钛酸四丁酯为氮源、钛源,利用溶剂热法制备氮掺杂二氧化钛光催化剂(N-TiO2),用XRD、SEM、IR、UV-vis DRS等对改性前后的催化剂进行表征。以LED灯为光源,氧氟沙星(OFX)为模型污染物,考察了N-TiO2协同单过硫酸氢钾(PMS)光催化降解OFX的性能。研究表明,当氮、钛摩尔比为0.6,OFX初始浓度为10 mg/L,N-TiO2和PMS投加量分别为1.8 g/L和3.5 mmol/L时,室温反应100 min,OFX的降解率达到94.6%。

Nitrogen-doped titanium dioxide photocatalysts(N-TiO2)were prepared by solvothermal method using urea and tetra-butyl titanate as nitrogen and titanium sources,respectively.The catalysts were characterized by XRD,SEM,IR and UV-Vis DRS.The photocatalytic degradation of ofloxacin by N-TiO2 in synergy with potassium monopersulfate(PMS)was investigated by using LED light source and ofloxacin as model pollutant.When the nitrogen/titanium molar ratio was 0.6,the study showed that the removal rate of ofloxacin reached 94.6% within 100 min under the condition that the initial concentration of ofloxacin was 10 mg/L,the dosage of N-TiO2 and PMS were 1.8 g/L and 3.5 mmol/L,and the room temperature was 25℃.