沸石中组装SrAl_2O_4:Eu^(2+),Dy^(3+)的可调发光现象  

The Adjustable Luminescence of SrAl_2O_4:Eu^(2+) ,Dy^(3+) Assmembled in Zeolite

作　　者：王晓华[1] 刘应亮[1] 容建华[1] 张静娴[1] 袁定胜[1] 

机构地区：[1]暨南大学化学系,广州510632

出　　处：《化学通报》2004年第7期540-544,共5页Chemistry

基　　金：国家自然科学基金 (5 9982 0 0 3;2 0 1710 18) ;广东省自然科学基金 (990 4 84和 0 132 0 1);稀土化学与物理重点实验室资助项目

摘　　要：首先用溶胶 -凝胶法制备符合 Sr Al2 O4:Eu2 + ,Dy3 + 化学组成的溶胶 ,然后通过机械研磨、水热反应和微波加热反应三种不同的组装方法和微波还原扩散法使其进入主体 ZSM- 5沸石的孔道中。主客体材料的荧光光谱出现显著蓝移 ,余辉光谱出现 4 0 0 nm和 5 17nm两个发射峰 ,两个余辉峰的相对发射强度随组装方法和组装浓度的改变而具有可调性 ,呈现有规律的变化。分析其原因是由于发光材料进入沸石的纳米级孔洞引起的。Stoichiometric SrAl 2O 4:Eu 2+ ,Dy 3+ sol guest was prepared by sol-gel method and assembled into the zeolite ZSM-5 host through mechanical mixing,hydrothermal reaction and microwave heating reaction.The fluorescence spectra of the reduced host-gust materials exhibit distinct blue-shift of the emission band of SrAl 2O 4:Eu 2+ ,Dy 3+ .Some interesting phenomena are that the after-glow emission spectra exist two bands at about 400nm and 517nm and the relative strengths of these two bands can be adjusted by the variation of the assembly methods and the assembly concentration,and it demonstrates certain changing regularity.These are attributed to the fact that the phosphor was capsulated into the voids of zeolite ZSM-5.

关 键 词：沸石分子筛 铝酸锶 铕离子 镝离子 光谱蓝移 可调性 长余辉 溶胶-凝胶法 制备 组装 微波还原扩散法 

分 类 号：O614[理学—无机化学]