Facile synthesis and color-tunable properties of BaLuF₅:Ce,Tb,Eu(Sm) submicrospheres via a facile ionic liquid/EG two-phase system

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• 作者：Yanhua Song^a ; ^{yhsong@jlu.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Yi Li^a ; Tianqi Zhao^a ; Yuexin Wang^a ; Tingting Cui^a ; Ye Sheng^a ; Keyan Zheng^a ; Xiuqing Zhou^a ; Hongpeng You^b ; Haifeng Zou^a ; ^{zouhf@jlu.edu.cn" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Ionic liquid ; Two-phase system ; BaLuF5 ; Color-tunable properties
• 刊名：Journal of Colloid and Interface Science
• 出版年：2017
• 出版时间：1 February 2017
• 年：2017
• 卷：487
• 期：Complete
• 页码：281-288
• 全文大小：2549 K

文摘

BaLuF₅:Ce,Tb,Eu(Sm) submicrospheres were synthesized via an ILs/ethylene glycol(EG) two-phase system. The crystalline phase, size, morphology, and luminescence properties were characterized using powder X-ray diffraction (XRD), field emission-scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), photoluminescence (PL) spectra. The results show that 1-methyl-3-octylimidazolium hexafluorophosphate ([Omim]PF₆) was used as fluoride source and capping agent to tune morphology and size of the crystals. The formation mechanism has been supposed. Under the excitation of ultraviolet, the BaLuF₅:5%Ce³⁺,5%Tb³⁺, BaLuF₅:Eu³⁺, and BaLuF₅:5%Ce³⁺,5%Sm³⁺ exhibit green and red emission, which was derived from Tb³⁺, Eu³⁺, and Sm³⁺ emission. When codoping Ce³⁺, Tb³⁺, Sm³⁺ or Eu³⁺ together, multi-color emission can be realized. Furthermore, this synthetic route may have potential applications for fabricating other lanthanide fluorides.