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首页> 外文期刊>CERAMICS INTERNATIONAL >Highly uniform Gd(OH)_3 and Gd_2O_3:Eu~(3+) hexagram-like microcrystals: glucose-assisted hydrothermal synthesis, growth mechanism and luminescence property
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Highly uniform Gd(OH)_3 and Gd_2O_3:Eu~(3+) hexagram-like microcrystals: glucose-assisted hydrothermal synthesis, growth mechanism and luminescence property

机译：高度均匀的Gd（OH）_3和Gd_2O_3：Eu〜（3+）卦状微晶：葡萄糖辅助水热合成，生长机理和发光性能

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摘要

Monodispersed and uniform Gd(OH)_3 microcrystals with novel hexagram-like morphology have been successfully prepared through a simple and green hydrothermal process with the assistance of glucose. The results of control experiments revealed that the glucose concentration in the reaction system was an important factor, which affected the morphology of the Gd(OH)_3 microcrystals significantly. On the basis of time-dependent experiments, the growth mechanism of the Gd(OH)_3 hexagrams was discussed. Furthermore, the Gd_2O_3 and Eu~(3+) -doped Gd_2O_3 hexagram-like microcrystals, inheriting the Gd(OH)_3 precursors' morphology, were obtained during a direct annealing process in air. The corresponding Gd_2O_3:Eu~(3+) hexagram-like microcrystals exhibit strong red emission pertaining to the ~5D_0→~7F_2 transition of the Eu~(3+) ions under UV light, which have potential applications in novel optoelectronic devices.
机译：通过简单，绿色的水热过程，在葡萄糖的辅助下，成功地制备了具有新颖六方形态的单分散且均匀的Gd（OH）_3微晶。对照实验结果表明，反应体系中的葡萄糖浓度是一个重要因素，对Gd（OH）_3微晶的形貌有显着影响。在与时间有关的实验的基础上，讨论了Gd（OH）_3卦的生长机理。此外，在空气中直接退火过程中获得了继承了Gd（OH）_3前体形态的Gd_2O_3和Eu〜（3+）掺杂的Gd_2O_3六方晶状微晶。相应的Gd_2O_3：Eu〜（3+）六边形微晶在紫外光下表现出与Eu〜（3+）离子〜5D_0→〜7F_2跃迁有关的强红色发射，在新型光电器件中具有潜在的应用前景。

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