| 摘要: |
| 为了制备催化性能优良的负载型TiO2光催化剂，以沸石为载体，采用正交设计法优化了浸渍法制TiO2/沸石光催化剂的工艺参数，以其对硫酸铵溶液中的氨氮降解率为考察指标，对其催化性能进行了研究。结果表明，制备TiO2/沸石光催化剂的最佳工艺条件为：m（TiO2）∶m（沸石）∶m（硅酸钠）=0.7∶10∶15，老化时间24 h，焙烧温度为400 ℃，焙烧时间1h。TiO2/沸石光催化剂最佳投放量为1.5 g/L，在紫外光照射下反应4 h，对废水的氨氮去除率可达98.92％。可见，采用优化浸渍法制备的TiO2／沸石光催化剂的光催化性能优良。 |
| 关键词: 沸石 光催化剂 氨氮去除率 |
| DOI： |
| 分类号: |
| 基金项目: |
|
| Preparation and photocatalytic behavior of TiO2-coated zeolite photocatalyst |
|
|
| Abstract: |
| Titanium dioxide-coated zeolite was prepared by the method of impregnation in order to find TiO2 photocatalyst with good catalytic properties.The major influential factors were optimized.This paper selected the degradation of N-NH3 as characterization of photocatalytic perfomance.The following results were obtained:the m(TiO2)∶m(zeolite)∶m(Na2SiO3) mass ratio was 0.7∶10∶15,the calcinations temperature was about 400 ℃,the calcinations time was 1 h,and the aging time was 24 h.Under UV radiation,98.92% of N-NH3 was photo-catalytically degraded by TiO2 coated zeolite photocatalyst for 4 h,and the optimum weight of TiO2 coated zeolite photocatalyst was 1.5 g/L TiO2 coated zeolite photocatalyst.The results indicated that the TiO2/zeolite prepared by the method of impregnation had a good performance of photodegradation. |
| Key words: zeolite TiO2 photocatalyst degradation of N-NH3-containing wastewater |
