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首页> 外文期刊>Chemistry: A European journal >Synthesis of porous zinc gallate prisms composed of highly oriented nanoparticles by an in situ conversion reaction
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Synthesis of porous zinc gallate prisms composed of highly oriented nanoparticles by an in situ conversion reaction

机译：通过原位转化反应合成由高取向纳米粒子组成的多孔没食子酸锌棱镜

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摘要

Porous ZnGa _2O _4 prisms assembled by highly oriented nanoparticles have been fabricated by an in situ chemical conversion approach. We report, for the first time, that a solid α-Ga _2O _3 precursor can be directly converted into ZnGa _2O _4 rather than through the intermediate GaOOH. Based on a detailed study of the evolution of ZnGa _2O _4 prisms, a growth mechanism is proposed for the in situ conversion reaction. During this conversion process, the precursor morphology can be highly retained, which is attributed to the similar atomic arrangements of the Ga and O atoms and excellent matching of the lattice spacing between the α-Ga _2O _3 and ZnGa _2O _4 prisms. The direct reaction between the precursor α-Ga _2O _3 and Zn ~(2+) ions is more efficient than that between the byproduct GaOOH and Zn ~(2+) ions. Moreover, the photoluminescent color of the ZnGa _2O _4 phosphor can be tuned by doping with Mn ~(2+) ions. Efficient energy transfer (ET) from the host lattice to the Mn ~(2+) centers is observed, whereas ET from the defects to the Mn ~(2+) ions is prohibited. The fabricated ZnGa _2O _4 products have potential in the field of display applications.
机译：通过原位化学转化方法制备了由高度取向的纳米粒子组装而成的多孔ZnGa_2O_4棱镜。我们首次报道，固体α-Ga_2O _3的前体可以直接转化为ZnGa _2O _4，而不是通过中间的GaOOH转化。在详细研究ZnGa _2O _4棱晶的基础上，提出了一种原位转化反应的生长机理。在此转换过程中，可以高度保留前体形态，这归因于Ga和O原子的相似原子排列以及α-Ga_2O _3和ZnGa _2O _4棱镜之间的晶格间距出色匹配。前体α-Ga_2O _3与Zn〜（2+）离子之间的直接反应比副产物GaOOH和Zn〜（2+）离子之间的直接反应更有效。此外，可以通过掺杂Mn〜（2+）离子来调整ZnGa _2O _4荧光粉的光致发光颜色。观察到从主晶格到Mn〜（2+）中心的有效能量转移（ET），而从缺陷到Mn〜（2+）离子的ET被禁止。所制造的ZnGa _2O _4产品在显示应用领域具有潜力。

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