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首页> 外文期刊>Crystal growth & design >Preparation and photoluminescence of single-crystalline GdVO4 : EU3+ nanorods by hydrothermal conversion of Gd(OH)(3) nanorods
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Preparation and photoluminescence of single-crystalline GdVO4 : EU3+ nanorods by hydrothermal conversion of Gd(OH)(3) nanorods

机译：Gd（OH）（3）纳米棒的水热转化制备单晶GdVO4：EU3 +纳米棒并进行光致发光

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摘要

This paper reports a hydrothermal conversion process of a rare earth nanostructure, Gd(OH)(3) nanorods, into photoluminescent GdVO4 nanorods, together with the investigation on the morphological changes and related photoluminescent properties. Gd(OH)(3) precursor with nanorod shape, uniform diameter, and good crystallinity was prepared by a colloidal hydrothermal method. High-resolution transmission electron microscopy (HRTEM) revealed the single-crystal nature of the precursor and preferred growth along the [001] direction. After hydrothermal conversion, well-crystallized GdVO4 nanorods were obtained. The growth direction of the newly formed nanorods was also confirmed as [001] from HRTEM investigation. TEM observations of the nanorod samples hydrothermally treated for 4 and 8 h indicated that the nanorods were formed by a surface deposition with a subsequent crystal growth procedure, during which the VO43- deposited onto the surface of the Gd(OH)(3) precursor and then reacted gradually with the inner core to generate the GdVO4 nanorods. Such GdVO4 nanorods showed strong red emission upon UV illumination when 5 at % Eu3+ was doped into the lattice, due to the intrinsic Eu3+ transition between D-5(0) and F-7(j) configuration, showing potential application of the nanorods in the photoluminescence field.
机译：本文报道了稀土纳米结构Gd（OH）（3）纳米棒到光致发光GdVO4纳米棒的水热转化过程，并研究了形态变化和相关的光致发光特性。通过胶体水热法制备了具有纳米棒形状，均匀直径和良好结晶度的Gd（OH）（3）前体。高分辨率透射电子显微镜（HRTEM）揭示了前体的单晶性质以及沿[001]方向的优选生长。水热转化后，获得了结晶良好的GdVO4纳米棒。 HRTEM研究也证实了新形成的纳米棒的生长方向为[001]。对纳米棒样品进行水热处理4和8 h的TEM观察表明，纳米棒是通过表面沉积和随后的晶体生长程序形成的，在此过程中，VO43-沉积在Gd（OH）（3）前体的表面上，然后与内核逐渐反应生成GdVO4纳米棒。由于D-5（0）和F-7（j）构型之间固有的Eu3 +跃迁，当将5 at％Eu3 +掺杂到晶格中时，此类GdVO4纳米棒在UV照射下显示出强烈的红色发射，这表明该纳米棒可能用于光致发光场。

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