摘要
以尿素为氮源,采用溶胶-凝胶法制备了氮掺杂纳米TiO2粉末,以甲基橙溶液为模拟染料废水,分别在可见光、模拟太阳光和紫外光条件下,研究了氮掺杂纳米TiO2光催化降解染料废水的性能。结果表明:氮掺杂可以提高TiO2的可见光催化活性;氮含量和煅烧温度对氮掺杂TiO2光催化活性影响较大,n(N)∶n(Ti)为10%且经500℃煅烧的氮掺杂TiO2在可见光和模拟太阳光下均具有最佳的光催化活性;然而在紫外光下,氮掺杂TiO2的光催化活性低于未掺杂的TiO2样品。
A series of N-doped titania powders have been prepared by sol-gel method using urea as nitrogen source. The photocatalytic degradation capacity of dyeing wastewater with N-doped titania powders is investigated under visible light, simulated sun rays and ultraviolet light, respectively. The results showed that N-doping can improve the photocatalytic activity of titania under visible light. Nitrogen content and calcination temperature can remarkably influence the photocatalytic activity of titania. When percentage of n （N） ：n （Ti） is 10% and the N-doped titania that is calcined at 500 ℃ possess, its photocatalytic activities under both visible light and simulated sun light are optimal. However, the photocatalytic activity of N-doped titania is lower than that of un-doped titania under ultraviolet light.
出处
《工业水处理》
CAS
CSCD
北大核心
2010年第9期50-53,共4页
Industrial Water Treatment
基金
福建省区域科技重大项目(2009H4006)
中国科学院知识创新工程青年人才领域前沿项目(0714171B10)
关键词
氮掺杂
二氧化钛
光催化
染料废水
N-doping
titania （TiO2）
photocatalytic
dyeing wastewater
