NBT-Eu纳米粉体的水热合成及其发光性能研究  

Hydrothermal Synthesis and Luminescence Properties of NBT-Eu Nanopowders

作　　者：孙建建[1] 陈鹏飞[1] 张帅[1] 方必军[1] 丁建宁[1] 

机构地区：[1]常州大学材料科学与工程学院,江苏省光伏科学与工程协同创新中心,江苏常州213164

出　　处：《发光学报》2016年第2期151-157,共7页Chinese Journal of Luminescence

基　　金：国家自然科学基金(51577015);江苏省高校自然科学研究重大项目(15KJA43002);江苏高校优势学科建设工程(苏学科办〔2014〕9号)资助项目

摘　　要：采用水热合成法、在不同条件下制备Na0.5Bi0.49Eu0.01Ti O3（NBT-Eu）纳米粉体。通过X射线粉末衍射（XRD）、紫外-可见光谱、透射电子显微镜、荧光光谱对样品进行表征。结果表明,在200℃、碱浓度12 mol·L-1、反应时间24 h、添加剂OP-10用量为0.6 m L时,可以得到纯三方钙钛矿结构的NBT-Eu粉体,该粉体以直径为15~200 nm的纳米棒形式存在。NBT-Eu粉体在458 nm激发下,产生689 nm的荧光,该荧光由Eu3＋的5D0→7F4能级跃迁产生。Na0.5Bi0.49Eu0.01TiO3 nanopowders were prepared by the hydrothermal method under different conditions. The synthesized nanopowders were characterized by X-ray diffraction, UV-visible spectra, transmission electron microscopy and photoluminescence spectra. The results reveal that the phase-pure rhombohedral perovskite structure NBT-Eu powders can be prepared at a hydrothermal temperature of 200 ℃ for 24 h with 12 mol L-1 NaOH and 0. 6 mL OP-10. The powders exhibit nanorod shape with a diameter of 15 to 200 nm. Under the excitation of 458 nm light, NBT-Eu nanopowders exhibit the strongest emission at 689 nm, which can be attributed to 5D0→7F4 transition of Eu3＋.

关 键 词：NBT-Eu 水热合成 光致发光 

分 类 号：O482.31[理学—固体物理]