摘要
对TiO2光催化剂进行改性,提高它的可见光活性。以钛酸四丁酯为前驱物,采用水解沉淀法制备了N/TiO2光催化剂,并采用X射线衍射(XRD)、红外光谱分析(FT-IR)、紫外-可见漫反射(UV-Vis)等方法对样品进行了表征,以活性红紫为模型污染物,考察了N掺杂量、焙烧温度等制备条件对N/TiO2粉体光催化活性的影响。结果表明:当氨水投加量为20 mL时,在500℃下焙烧1 h制得的催化剂具有最高的光催化活性;同样条件下,其催化活性约为市售普通的Degussa P25 TiO2的1.5倍,N/TiO2光催化剂在可见光范围内对活性红紫的降解具有很好的应用前景。
TiO2 photocatalyst was modified to increase its photocatalytical activity at visible light.With tetrabutyl titanate as a precursor,N-doped TiO2 photocatalyst was prepared by hydrolyzation-precipitation method and characterized by XRD,FT-IR and UV-Vis and its photocatalytic activity was studied by using reactive red violet dye as a model pollutant.The effects of the N-doping amount and calcination temperature on photocatalytical degradation of reactive red violet were also examined.The results show that the photocatalyst calcined at 500 ℃ for 1 h and ammonia amount of 20 mL performs the highest photocatalytic activity,which is 1.5 times of that of Degussa P25 TiO2 according to the removal of reactive red violet.The N-doped TiO2 is a promising photocatalyst for the degradation of reactive red violet at visible light.
出处
《化学工程》
CAS
CSCD
北大核心
2010年第11期72-76,共5页
Chemical Engineering(China)
基金
教育部新世纪优秀人才计划(NECT-07-0175)
教育部科学技术研究重点项目(107046)
上海市基础研究重点项目(08JC1400500)
关键词
水解沉淀法
氮掺杂
光催化
活性红紫
hydrolyzation-precipitation method
N-doped
photocatalysis
reactive red violet
