稀土学报(英文版)
稀土學報(英文版)
희토학보(영문판)
JOURNAL OF RARE EARTHS
2003年
1期
26-30
,共5页
陈野%蔡伟民%于英宁%崔丹%孙晓君
陳野%蔡偉民%于英寧%崔丹%孫曉君
진야%채위민%우영저%최단%손효군
fluorescence%europium%nano-material%titanium dioxide%rare earths
A series of europium-doped titanium dioxide (TiO2) fluorescent nano-materials prepared by sol-gel method is presented. The phase structure and crystalline sizes of TiO2∶Eu, which is doped with different europium content and then heat-treated at different temperature, were investigated by XRD,TG,DTA and TEM. The results show that europium could be introduced into TiO2 under high temperature and it can suppress the structural phase transition from anatase to rutile and the crystal growth of TiO2 in TiO2∶Eu nano-materials. The fluorescence spectra were examined by fluorescence spectrophotometer, and the results show that the fluorescence intensity is the strongest when europium content is 2.68%(mole fraction) and the heat-treated temperature is 700 ℃. From the measurement results of the fluorescence lifetimes, it can be seen that the fluorescence lifetime could be prolonged when europium is incorporated in TiO2.
