Ba2GdF7 Nanocrystals: Solution-Based Synthesis, Growth Mechanism, and Luminescence Properties

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• 作者：Qi Zhao ; Baiqi Shao ; Wei L眉 ; Yongchao Jia ; Wenzhen Lv ; Mengmeng Jiao ; Hongpeng You
• 刊名：Crystal Growth & Design
• 出版年：2014
• 出版时间：April 2, 2014
• 年：2014
• 卷：14
• 期：4
• 页码：1819-1826
• 全文大小：576K
• 年卷期：v.14,no.4(April 2, 2014)
• ISSN：1528-7505

文摘

Pseudo-octahedrons of Ba₂GdF₇ were successfully synthesized through a solution-based method in a hydrothermal environment for the first time. The preferential adsorption of ethylene glycol (EG) molecules on the {111} planes contributed to the formation of the octahedral shape. Hydrazine was employed as the alkaline source to adjust the adsorption affinity of EG and the hydrolysis rate of NaBF₄ (fluorine supply), thereby controlling the morphology and phase structure. A series of contrast experiments were conducted to investigate the growth mechanism of the Ba₂GdF₇ nanocrystals. As a proof-of-concept experiment, Eu³⁺, Tb³⁺, Dy³⁺, and Yb³⁺/Er³⁺ ions were doped to demonstrate the potential of the Ba₂GdF₇ crystals as host material for phosphors.