掺Zn纳米TiO_2的光致发光及其与光催化活性的关系  

Photoluminescence performance of Zn doped TiO_2 nanoparticles and its relationships with the photocatalytic activity

作　　者：周强[1] 井立强[2] 李姝丹[2] 

机构地区：[1]中国矿业大学煤炭资源教育部重点实验室,北京100083 [2]黑龙江大学化学化工与材料学院,黑龙江哈尔滨150080

出　　处：《黑龙江大学自然科学学报》2005年第6期753-757,共5页Journal of Natural Science of Heilongjiang University

基　　金：黑龙江省自然科学基金重点项目(ZJG04-04);黑龙江省自然科学基金面上项目(B0305)

摘　　要：采用sol-gel法制备了纯的和掺杂不同量Zn的TiO2纳米粒子,并利用XRD,XPS和PL光谱等对样品进行了表征,主要考察了焙烧温度和掺Zn量对TiO2纳米粒子PL性质以及光催化活性的影响,并探讨了PL光谱与光催化活性的关系。结果表明:Zn的掺杂没有引起新的光致发光现象,但适量Zn的掺杂能够增加TiO2纳米粒子PL光谱的强度。在光催化氧化苯酚过程中,经500℃处理的样品表现出较高的活性。不同掺Zn量的TiO2样品的活性顺序是:3mol%>1mol%>0.5mol%>0mol%>5mol%,这与它们的PL光谱强度的顺序是一致的。即PL强度越高,光催化活性越高。The pure and Zn doped TiO2nanoparticles were prepared by the sol -gel method, and also characterized by means of XRD, XPS and PL techniques. The effects of calcination temperature and Zn amount on PL and photocatalytic activity of TiO2 nanoparticles were mainly investigated, as well as their relationships. The results show that doping Zn does not result into a new PL phenomenon, however, an appropriate amount of Zn dopant can enhance the PL intensity of TiO2nanoparticles. Moreover, during the process of photocatalytic oxidation phenol, for the TiO2 sample calcined at 500~C, it can exhibit high photocatalytic activity, and the activity orders of TiO2 with different amount of Zn dopant are as following： 3mo1% 〉 1 mol% 〉 0.5mo1% 〉 0mol% 〉 5mo1%, which is in good agreement with their orders of PL intensity. In other words, the stronger the PL signals, the higher the photocatalytic activity.

关 键 词：TIO2 纳米粒子 掺杂 光致发光 光催化 

分 类 号：O643[理学—物理化学]