离子液体推动支撑液膜体系法简单制备 LaPO:Ce，Tb 荧光粉。

Simple Preparation of LaPO:Ce, Tb Phosphors by an Ionic-Liquid-Driven Supported Liquid Membrane System.

机构信息

School of Chemical Engineering, Inner Mongolia University of Technology, Hohhot 010051, China.

Xiamen Institute of Rare Earth Materials, Chinese Academy of Sciences, Xiamen 361021, China.

出版信息

Int J Mol Sci. 2019 Jul 12;20(14):3424. doi: 10.3390/ijms20143424.

DOI:10.3390/ijms20143424

PMID:31336869

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6679419/

Abstract

In this work, LaPO:Ce, Tb phosphors were prepared by firing a LaPO:Ce, Tb precipitate using an ionic-liquid-driven supported liquid membrane system. The entire system consisted of three parts: a mixed rare earth ion supply phase, a phosphate supply phase, and an ionic-liquid-driven supporting liquid membrane phase. This method showed the advantages of a high flux, high efficiency, and more controllable reaction process. The release rate of PO from the liquid film under different types of ionic liquid, the ratio of the rare earth ions in the precursor mixture, and the structure, morphology, and photoluminescence properties of LaPO:Ce, Tb were investigated by inductively coupled plasma-atomic emission spectroscopy, X-ray diffraction, Raman spectra, scanning electron microscopy, and photoluminescence emission spectra methods. The results showed that a pure phase of lanthanum orthophosphate with a monoclinic structure can be formed. Due to differences in the anions in the rare earth supply phase, the prepared phosphors showed micro-spherical (when using rare earth sulfate as the raw material) and nanoscale stone-shape (when using rare earth nitrate as the raw material) morphologies. Moreover, the phosphors prepared by this method had good luminescent properties, reaching a maximum emission intensity under 277 nm excitation with a predominant green emission at 543 nm which corresponded to the D-F transition of Tb.

摘要

在这项工作中，通过使用离子液体驱动的支撑液膜系统对 LaPO:Ce, Tb 沉淀物进行烧制，制备了 LaPO:Ce, Tb 荧光粉。整个系统由三个部分组成：混合稀土离子供应相、磷酸盐供应相和离子液体驱动的支撑液膜相。该方法具有通量高、效率高和反应过程更可控的优点。通过电感耦合等离子体原子发射光谱、X 射线衍射、拉曼光谱、扫描电子显微镜和荧光发射光谱法研究了不同类型的离子液体、前驱体混合物中稀土离子的比例、LaPO:Ce, Tb 的结构、形貌和荧光性能对液体膜中 PO 的释放速率的影响。结果表明，可以形成具有单斜结构的纯相磷酸镧。由于稀土供应相中的阴离子不同，所制备的荧光粉呈现出微球形（当使用稀土硫酸盐作为原料时）和纳米尺度的石头形状（当使用稀土硝酸盐作为原料时）。此外，通过这种方法制备的荧光粉具有良好的发光性能，在 277nm 激发下达到最大发射强度，主要发射峰在 543nm 处，对应于 Tb 的 D-F 跃迁。