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首页> 外文期刊>Crystal growth & design >Ionic Liquid-Assisted Hydrothermal Synthesis of Monoclinic Structured LaVO4 Nanowires through Topotactic Transformation from Hexagonal La(OH)3 Nanowires
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Ionic Liquid-Assisted Hydrothermal Synthesis of Monoclinic Structured LaVO4 Nanowires through Topotactic Transformation from Hexagonal La(OH)3 Nanowires

机译：六角形La（OH）3纳米线的全同立构变换离子液体辅助水热合成单斜结构LaVO4纳米线

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摘要

Ultralong m-LaVO4 nanowires were synthesized from h-La(OH)3 nanowires via topotactic transformation in an ionic liquid-assisted hydrothermal system. The structure and morphology of the as-synthesized samples were characterized by X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy/high-resolution TEM, and Fourier transform infrared spectrometry. It was found that ionic liquid [BMIM]Br can effectively influence the morphology of h-La(OH)3 one-dimensional nanostructures through the adsorbing model of [BMIM]Br on the (010) plane, which controlled the oriented growth along the [001] direction. After the results were systematically analyzed from products obtained by modifying the reaction time from 1 to 48 h, topotactic transformation from h-La(OH)3 through the diffusion of VO3 - ions to m-LaVO4 is proposed to explain the growth mechanism of m-LaVO4 nanowires.
机译：通过离子液体辅助水热系统中的全向转化，由h-La（OH）3纳米线合成了超长m-LaVO4纳米线。通过X射线衍射，场发射扫描电子显微镜，透射电子显微镜/高分辨率TEM和傅里叶变换红外光谱对合成后的样品的结构和形态进行表征。离子液体[BMIM] Br可以通过[BMIM] Br在（010）面上的吸附模型有效地影响h-La（OH）3一维纳米结构的形貌，该模型控制了沿[109]面的定向生长。 [001]方向。系统地分析了反应时间从1到48 h的变化结果后，提出了从h-La（OH）3通过VO3-离子向m-LaVO4扩散的全向立构转化，以解释m的生长机理。 -LaVO4纳米线。

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