TiO_2粉体的光谱特性与光催化性能的研究  

STUDY OF THE PHOTOCATALYSIS OF NANOMETER POWDER AND FINE POWDER OF TiO_2 BY SPECTRUM

作　　者：袁伟[1] 戴遐明[1] 艾德生[1] 李庆丰[1] 

机构地区：[1]清华大学核研院精细陶瓷实验室,北京100084

出　　处：《硅酸盐学报》2002年第z1期31-35,共5页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金资助项目(59882002)。

摘　　要：通过X射线衍射、透射电镜、BET氮吸附比表面、漫反射光谱、荧光光谱等测试手段表征TiO2细粉和纳米TiO2粉的特性;并通过降解 甲基橙的光催化实验,研究了TiO2粉体不同粒径、晶相与光催化效果的关系。锐钛矿相及锐钛矿和金红石的复合相粉体的半导体特性明显, 颗粒越小光催化的效果越好,粒度<15 nm的粉体光催化效率最高。The specific properties of TiO2 nanometer and fine powders were characterized by TEM, BET, XRD, DRS (diffuse reflection spectroscopy) and FS (fluorescence spectroscopy), and their photocatalysis activities were tested by degradation of methyl orange in the solution of pH value 7. The relations between photocatalysis activities and grain size, crystal phase, semiconductor characteristic and electric charge density on the powder surface were estimated. It is found that the powders, in anatase phase or composite of anatase and rutile phase, have better performance of photocatalysis, and the smaller the grain size, the better the performance. Due to the nano effect, the best photocatalysis effect is achieved while using the powder whose grain size is less than 15 nm.

关 键 词：氧化钛 光催化 光谱特性 

分 类 号：TB44[一般工业技术]