水热合成YbMnO_3纳米颗粒和YbMn_2O_5纳米线(英文)

SELECTIVE SYNTHESIS OF YbMnO_3 NANOPARTICLES AND YbMn_2O_5 NANORODS VIA A SIMPLE HYDROTHERMAL METHOD

采用简单的水热合成方法合成了纯六角相的YbMnO3纳米粒子和正交相的YbMn2O5纳米线,并用X射线衍射仪、扫描电镜、透射电镜、选区电子衍射以及高分辨透射电镜对产物进行了表征,研究了反应时间、温度和NaOH浓度对YbMnO3结构的影响,提出了水热合成条件下YbMnO3与YbMn2O5成核的机理.

Pure hexagonal phase YbMnO3 nanoparticles and orthorhombic phase YbMn2O5 nanorods have been successfully synthesized with a simple hydrothermal processing.The as-synthesized samples were characterized with X-ray diffraction,scanning electron microscopy,transmission electron microscopy,selective area electron diffraction and high-resolution transmission electron microscopy.The influence of reaction time,reaction temperature and the concentration of NaOH on the phase structure of YbMnO3 were investigated.A dissolution-nucleation-recrystallization mechanism was proposed for the formation of YbMnO3 nanoparticles and YbMn2O5 nanorods under hydrothermal synthesis condition.