Simple Preparation of LaPO4:Ce, Tb Phosphors by an Ionic--Liquid--Driven Supported Liquid Membrane System
作者单位：School of Chemical Engineering Inner Mongolia University of Technology Xiamen Institute of Rare Earth Materials Chinese Academy of Sciences Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Provincial Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Baotou Research Institute of Rare Earths
会议名称：《稀土元素镧铈钇应用研究研讨会暨广东省稀土产业技术联盟成立大会》
会议日期：2019年
学科分类：07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学]
摘 要：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 POfrom 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 5 D4-7 F5 transition of Tb.