(1. 贵州师范大学 化学与材料科学学院，贵阳 550001；
2. 贵州省功能材料化学重点实验室，贵阳 550001；
3. 广西科技大学 科技处，柳州545006；
4. 中南大学 材料科学与工程学院，长沙 410083)
摘 要: 采用水热法合成Eu3+掺杂的RE2Sn2O7(RE=La, Gd, Y)系列样品，并采用XRD、SEM、FT-IR和荧光光谱对合成产物的晶体结构、颗粒尺寸、形貌和光学性能进行研究。结果表明：水热合成产物为单一相烧绿石结构的RE2Sn2O7:Eu3+(RE=La, Gd, Y)，产物具有由一次纳米颗粒团聚而成的不规则球状形貌。激发光谱和发射光谱测试结果表明：Eu3+掺杂RE2Sn2O7(RE=La, Gd, Y)样品可以被紫外光有效地激发，发射出Eu3+离子特征的橙红色光。与其他样品相比，Gd2Sn2O7:Eu3+样品具有最强的橙红色发光，并对其原因进行了分析。
关键字: RE2Sn2O7纳米荧光材料；烧绿石结构；水热合成；光学性能
（1. School of Chemistry and Materials Science, Guizhou Normal University, Guiyang 550001, China;
2. Guizhou Province Key Laboratory of Functional Materials Chemistry, Guiyang 550001, China;
3. Department of Science and Technology, Guangxi University of Science and Technology, Liuzhou 545006, China;
4. School of Materials Science and Engineering, Central South University, Changsha 410083, China）
Abstract:Eu3+ doped RE2Sn2O7(RE=La, Gd, Y) nanocrystals were successfully synthesized by hydrothermal synthesis method. The crystal structure, particle size, morphology and optical properties of the as-synthesized products were investigated by XRD, SEM, FT-IR and photoluminescence spectroscopy. The results show that the as-prepared samples are of phase-pure pyrochlore structure, which displays irregular spheres shape with nanocrystals. The photoluminescence spectra of Eu3+ doped RE2Sn2O7(RE=La, Gd, Y) nanophosphors show characteristic 4f-4f intraconfigurational transitions of Eu3+ under ultraviolet excitation. Furthermore, Gd2Sn2O7:Eu3+ exhibits stronger orange-red emission intensities compared with the other samples, and the possible causes were discussed.
Key words: RE2Sn2O7 nanophosphors; pyrochlore structure; hydrothermal synthesis; optical properties
