低温合成N掺杂纳米TiO_2及其光催化效果研究  

Synthesis and photocatalytic activity of N-doped nano-titanium dioxide in low temperature

作　　者：白小龙[1] 夏晋[1] 郭凯旋[1] 晋日亚[1] 

机构地区：[1]中北大学化工与环境学院,太原030051

出　　处：《化工新型材料》2013年第12期121-123,共3页New Chemical Materials

基　　金：太原市大学生创新创业专项基金项目(120164050)

摘　　要：在85℃水浴和超声条件下,以硫脲为氮源,四异丙醇钛为前驱体,采用水解法反应后,经煅烧合成氮掺杂纳米TiO2。用X射线衍射、比表面积测试、扫描电子显微镜等方法对制备的粉体进行表征,以甲基橙溶液为目标污染物,考察钛氮比、煅烧温度对氮掺杂纳米TiO2光催化活性的影响。结果表明,n(Ti)∶n(N)=10∶1,煅烧温度为200℃时制得的形貌较好的氮掺杂锐钛矿纳米TiO2,在可见光下降解甲基橙溶液300min,降解率可达87.57%,而紫外光下100min,降解率达到98.72%。N-doped nano-titanium dioxide was synthesized by thiourea and titanium tetraiso-propoxide as raw mate- rials, under ultrasound, used hydrolysis reaction at 85℃ and calcine. Its morph ology was characterized by XRD, BET and SEM. In addition, the effects of photocatalytic activity of the dioxide were investigated by degrading the methyl orange solu- tion, and the optimum conditions were 10 ： 1 molar ratio of the titanium tetraisopropoxide and thiourea, the calcination tem- perature was 200℃, under which the dioxide can obtain better morphology. However, the degradation rate of methyl orange was 98. 72% when the dioxide in the UV light for 100min ,while only 87.57% in visible light for 300min.

关 键 词：掺杂 纳米TIO2 制备 光催化 

分 类 号：O643.36[理学—物理化学] X70[理学—化学]