铕掺杂二氧化钛发光性质的探究

Study on Luminescent Properties of Europium Doped Titanium Dioxide

以Eu(NO_(3))3·6H_(2)O为铕源,采用溶胶-凝胶法制备TiO_(2)粉体和掺杂Eu^(3+)的TiO_(2)粉体。研究了Eu^(3+)离子掺杂对Ti O_(2)基质物相、发光性能的影响。利用X射线衍射(XRD)、荧光光谱进行表征。通过荧光光谱(PL)分析可知,Eu^(3+)掺杂二氧化钛会降低激子发光的荧光强度和缩减激子发光的光响应范围,从而会增强二氧化钛的光催化效率;同时Eu^(3+)与二氧化钛之间存在能量传递,Eu^(3+)可以吸收二氧化钛非辐射跃迁产生的能量,实现本身的能级跃迁。

With Eu(NO_(3))3·6 H_(2) O as the europium source, TiO_(2) powder and Eu^(3+)-doped TiO_(2) powder were prepared by the sol-gel method. The effects of Eu^(3+) ion doping on the phase and luminescence properties of the TiO_(2) matrix were studied, and X-ray diffraction(XRD) and fluorescence spectroscopy were used for characterization. Fluorescence spectroscopy(PL) analysis showed that Eu^(3+) doped titanium dioxide reduced the fluorescence intensity of exciton emission and reduced the light response range of exciton emission, thereby enhancing the photocatalytic efficiency of titanium dioxide. At the same time, there was energy transfer between Eu^(3+) and titanium dioxide. Eu^(3+) could absorb the energy generated by the non-radiative transition of titanium dioxide and realize its own energy level transition.