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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
【摘要】 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10mg/L,N-TiO2和PMS投加量分别为1.8g/L和3.5mmol/L时,室温反应100 min,OFX的降解率达到94.6%。
【Abstract】 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 mono-persulfate(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℃.
【Key words】 nitrogen doped titanium dioxide; potassium mono-persulfate; ofloxacin; photocatalytic degradation;
- 【文献出处】 广州化学 ,Guangzhou Chemistry , 编辑部邮箱 ,2021年01期
- 【分类号】O643.36;O644.1;X703
- 【被引频次】3
- 【下载频次】312