利用 Ｅｕ３ ＋ 离子的５ Ｄ０ →７ Ｆ２ 超灵敏跃迁对环境的极度敏感性， 将 Ｅｕ３ ＋ 离子引入溶胶凝胶法制备的 Ｔｉ Ｏ２ 凝胶玻璃中， 并对 Ｅｕ３ ＋ 离子掺入后的光谱性质进行了研究， 从而表征了 Ｔｉ Ｏ２ 凝胶形成中的结构变化过程结果发现， 随处理温度的升高，５ Ｄ０ →７ Ｆ２ 跃迁强度逐渐增强， 说明水分子的不断挥发、缩聚反应进行的不断完全； 同时将 Ａｌ３ ＋ 离子掺入到溶胶中， 研究了其在 Ｅｕ３＋ 离子的聚集所导致的荧光猝灭现象中所起的作用， 结果表明 Ａｌ３ ＋ 离子的加入大大提高了 Ｅｕ３＋ 离子的发光强度
Because of the extremely sensitivity to the local environment of the 5D0→7F2 transition of Eu3+ ion, the fluorescence
of Eu3+ ions was studied by introducing Eu3+ ions to TiO2 gel by the sol-gel method, from which the structural changes of TiO2 gel
were characterized. The results showed that the intensity of 5D0→7F2 transition increased with the increasement of heat treatment temperature,
which indicated the evaporation of molecular water and the completeness of the condensation reaction. Because of the quenching of the fluorescence
induced by the cluster of Eu3+ ions, the addition of Al3+ ions greatly enhanced the emission intensity of Eu3+ ion.
参考文献
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