(1. 貴州師范大學 化學與材料科學學院，貴陽 550001；
2. 貴州省功能材料化學重點實驗室，貴陽 550001；
3. 廣西科技大學 科技處，柳州545006；
4. 中南大學 材料科學與工程學院，長沙 410083)
摘 要: 采用水熱法合成Eu3+摻雜的RE2Sn2O7(RE=La, Gd, Y)系列樣品，并采用XRD、SEM、FT-IR和熒光光譜對合成產(chǎn)物的晶體結(jié)構(gòu)、顆粒尺寸、形貌和光學性能進行研究。結(jié)果表明：水熱合成產(chǎn)物為單一相燒綠石結(jié)構(gòu)的RE2Sn2O7:Eu3+(RE=La, Gd, Y)，產(chǎn)物具有由一次納米顆粒團聚而成的不規(guī)則球狀形貌。激發(fā)光譜和發(fā)射光譜測試結(jié)果表明：Eu3+摻雜RE2Sn2O7(RE=La, Gd, Y)樣品可以被紫外光有效地激發(fā)，發(fā)射出Eu3+離子特征的橙紅色光。與其他樣品相比，Gd2Sn2O7:Eu3+樣品具有最強的橙紅色發(fā)光，并對其原因進行了分析。
關鍵字: RE2Sn2O7納米熒光材料；燒綠石結(jié)構(gòu)；水熱合成；光學性能
（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
