Self-assembled flowerlike europium-doped lanthanide molybdate microarchitectures and their photoluminescence properties

被引:86
作者
Zhang, Na
Bu, Wenbo
Xu, Yunpeng
Jiang, Danyu
Shi, Jianlin [1 ]
机构
[1] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lah High Performance Ceram & Superfine, Shanghai 200050, Peoples R China
[2] Chinese Acad Sci, Grad Sch, Shanghai 200050, Peoples R China
关键词
D O I
10.1021/jp064624o
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Three-dimensional flowerlike europium-doped lanthanide molybdate [La-2(MoO4)(3):Eu] microarchitectures that exhibit efficient photoluminescence have been successfully synthesized via a facile hydrothermal process in the presence of the surfactant bis(2-ethylhexyl)sulfosuccinate (AOT). The La-2(MoO4)(3):Eu microspheres are well dispersed, have a uniform diameter of about 3 mu m, and are composed of nanoflakes of about 30-nm thickness that connect to each other by both edge-to-edge and edge-to-flat-surface conjunctions with few surface-to-surface attachments. The surfactant NaAOT was found to play a crucial role in achieving the good dispersibility and uniform morphology of the final product, as compared to the same material but synthesized without the surfactant. The UV absorption results illustrate that there is a 20-nm blue shift of CT band relative to bulk materials, which can be attributed to the quantum size effects of the nanoflakes. These La-2(MoO4)(3):Eu microspheres show efficient photoluminescence that is associated with the well-crystallized structures of the microarchitectures.
引用
收藏
页码:5014 / 5019
页数:6
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