Eu(BA)3／SiO2复合材料的制备及其发光性能  

Preparation and luminescent characteristics of compound material Eu(BA)_3/SiO_2

作　　者：李艳华[1] 曾冬铭[1] 黄可龙[1] 付长城[1] 

机构地区：[1]中南大学化学化工学院

出　　处：《中南大学学报（自然科学版）》2008年第2期295-299,共5页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(20376085)

摘　　要：采用溶胶-凝胶技术两步法把Eu(BA)3掺入到SiO2中制备Eu(BA)3/SiO2复合发光材料,并对其发光性能进行研究。研究结果表明,制备Eu(BA)3/SiO2复合发光材料的最佳工艺条件是:水与正硅酸乙酯摩尔比为4,正硅酸乙酯、盐酸和六次甲基四胺的摩尔比为1-7.5×10-4-5×10-3,陈化温度为40℃,掺入SiO2中的苯甲酸和铕离子的摩尔比为3-1,苯甲酸铕掺入量为1%。对Eu(BA)3粉体和Eu(BA)3/SiO2复合发光材料荧光光谱进行比较发现:Eu(BA)3/SiO2复合发光材料激发光谱最大吸收峰变窄,同时发生蓝移,由288nm蓝移到280nm;Eu(BA)3/SiO2复合发光材料发射光谱在594nm和618nm处分别出现Eu3+的5D0→7F1和5D0→7F2跃迁发射,单位质量稀土配合物的发光强度是Eu(BA)3粉体的3倍左右。Eu（BA）3/SiO2 was prepared by moans of Eu（BA）3 incorporated into SiO2 matrix using a two stop sol-gel method and its luminescent characteristics were investigated. The results show that the optimal parameters of Eu（BA）3/SiO2 prepared are as follows： molar ratio of H20 to TEOS is 4, molar ratio of TEOS to HCI to （CH2）6N4 is 1：7.5×10^-4：5×10^-3, the precursor solution is converted to wet gel at 40 ℃, molar ratio of HBA to Eu^3＋ is 3, and Eu（BA）3 o doped in material is 1%. Compared with fluorescence spectrum of Eu（BA）3 powder, Eu（BA）3/SiO2 synthesized in above condition has a narrower maximal excitation peak and a small blue shift, from 288 nm to 280 nm in excitation spectra. The ^5D0→^7F1 and ^5D0→^7F2 transition emissions of Eu^3＋ appear at 594 nm and 618 nm in emission spectra, respectively, and the emission intensity of Eu（BA）3/SiO2 is three times as strong as that of Eu（BA）3 powder.

关 键 词：溶胶-凝胶法 稀土配合物 Eu(BA)3/SiO2 发光 

分 类 号：O482.31[理学—固体物理]