Synthesis of Hexagonal Prism (La, Ce, Tb)PO4 Phosphors by Precipitation Method
Synthesis of Hexagonal Prism (La, Ce, Tb)PO4 Phosphors by Precipitation Method
复制标题
DOI：
10.1021/cg201225k
复制
发表时间：
2012-02
影响因子：
3.8
通讯作者：
Yurong Shi;Yuhua Wang;Dan Wang;Bitao Liu;Yanhui Li;Lan Wei
中科院分区：
文献类型：
--
作者：
Yurong Shi;Yuhua Wang;Dan Wang;Bitao Liu;Yanhui Li;Lan Wei
采用常压沉淀法从水溶液中成功地制备了（La，Ce，Tb）PO 4绿色荧光粉。沉淀是从镧系元素-硝酸盐配合物和（NH 4）2 HPO 4与柠檬酸作为结构改性剂。棱镜的长径比和尺寸可以分别通过改变柠檬酸的含量和溶液的酸度来调整。并探讨了柠檬酸和酸度对形貌的影响机理。采用扫描电子显微镜、透射电子显微镜、高分辨透射电子显微镜、X射线衍射、差热分析-热重分析等手段对产物的形貌进行了表征，并探讨了六棱柱形成和生长的可能机制。此外，还对（La，Ce，Tb）PO 4的光致发光（PL）特性进行了研究，并与商业荧光粉进行了比较。
Hexagonal prism (La, Ce, Tb)PO4 green phosphors have been successfully prepared via a precipitation method route at ambient pressure from aqueous solution. The precipitation was obtained from lanthanide-nitrate complexes and (NH4)2HPO4 with citric acid as a structural modifier. The prism length diameter ratio and size can be tailored by varying the content of citric acid and the acidity of the solution, respectively. The mechanism of how the citric acid and acidity affect morphology has also been studied. Scanning electron microscopy, transmission electron microscopy, high-resolution transmission electron microscopy, X-ray diffraction, and differential thermal analysis-thermogravimetry were used to characterize the morphology of the products and investigate the possible mechanism of formation and growth of the hexagonal prism. Furthermore, photoluminescence (PL) properties of (La, Ce, Tb)PO4 products were also carried out and compared with those of commercial phosphors.