中文摘要：

采用螯合剂辅助水热法,在较低的温度下合成了DyF3纳米晶。通过调节反应条件,实现了对产物形貌的控制合成。用X射线衍射仪（XRD）、场发射扫描电子显微镜（SEM）等对样品的形貌和晶体结构进行表征。结果表明：当反应温度为180℃,反应时间为48h,反应溶液pH=3,添加EDTA螯合剂的浓度为1.67μmol/L的条件下,能够制备出晶体形貌均一的截角八面体DyF3纳米晶体。

英文摘要：

DyF3 nanocrystals can be synthesized by the adding chelating agent EDTA based on hydrothermal at low temperature. This method will find its applications in exploring the crystal growth process and provide guidance for the morphology controllable synthesis. The phase and shape of the products were characterized by XRD, SEM. The morphology of uniform truncated octahedron DyF3 nanocrystals can be prepared when the concentration of EDTA reached 1.67 μmol/L, at 180℃ for 24 h with pH value of 10.