稀土离子掺杂纳米TiO2的谱学特性研究
Spectroscopic Properties of Lanthanide Doped Titanium Dioxide Nanoparticles
作者：侯廷红(四川大学 材料科学与工程学院,四川 成都610065)；毛健(四川大学 材料科学与工程学院,四川 成都610065)；杨玲(四川大学 材料科学与工程学院,四川 成都610065)
Author：(School of Materials Sci. and Eng.,Sichuan Univ.,Chengdu 610065,China)；(School of Materials Sci. and Eng.,Sichuan Univ.,Chengdu 610065,China)；(School of Materials Sci. and Eng.,Sichuan Univ.,Chengdu 610065,China)
收稿日期：2006-03-22 年卷（期）页码：2006,38(5):117-121
期刊名称：工程科学与技术
Journal Name：Advanced Engineering Sciences
关键字：纳米TiO2；稀土；掺杂；荧光光谱；紫外-可见漫反射光谱
Key words：titanium dioxide;lanthanide;doping;fluorescence spectroscopy;UV-vis spectroscopy
基金项目：
中文摘要
采用sol-gel法制备不同稀土元素(La,Ce,Pr,Nd,Sm)掺杂TiO2纳米粒子，采用荧光光谱和紫外-可见漫反射光谱对样品的谱学特性进行对比研究。结果表明，Sm掺杂引起新的发光现象，荧光谱中两个发射峰的强度随Sm掺杂浓度的改变而改变，而其余稀土元素掺杂只影响纯TiO2发射峰的位置和强度；Ce掺杂造成漫反射光谱的吸收边发生红移，且红移幅度随Ce掺杂浓度的改变而改变，其余稀土元素掺杂则造成吸收边蓝移。
英文摘要
Nanosized lanthanide-doped TiO2 samples with different Ti/Ln (Ln=La,Ce,Pr,Nd,and Sm) atomic ratios were prepared by sol-gel method using tetrabutyl titanate and lanthanide nitrate as precursors, and were characterized by fluorescence and UV-vis diffuse reflection spectroscopy. Unique fluorescence properties were observed from Sm-doped TiO2 nanoparticles and the intensity of peaks in the emission spectra varied with the doping concentration. Compared with undoped TiO2, the absorption edges of Ce-doped samples were red-shifted remarkably and those of other lanthanide ions doped samples were blue shifted.
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