| 水热法合成ReMn2O5(Re=Gd，Sm，Yb)纳米粉体 | |
| Synthesis of ReMn2O5(Re=Gd, Sm, Yb) Nanopowders by Hydrothermal Method | |
| 摘要: 本文采用水热法，以KMnO4和Mn(C2H3O2)2为锰源，在250 ℃反应24 h合成了高各向异性的GdMn2O5、SmMn2O5和YbMn2O5纳米粉体。利用X射线粉末衍射(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)、选区电子衍射(SAED)、和高分辨透射电镜(HRTEM)对产物的结构和形貌进行了表征。结果表明，所制备的ReMn2O5(Re=Gd，Sm，Yb)均为正交相结构。反应溶液中碱性矿化剂浓度对产物的形貌和尺寸有重要的影响。通过实验结果分析了纳米结构的形成机理。 | |
| 关键词: 纳米粉体 多铁性 水热合成 形貌 | |
| 基金项目: | |
| Abstract: Single-phase ReMn2O5(Re=Gd, Sm and Yb) nanostructures have been successfully synthesized via a simple hydrothermal process at 250 ℃ for 24 h using KMnO4 and Mn(C2H3O2)2 as manganese sources. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM) and selective area electron diffraction patterns (SAED) were used to characterize the as-synthesized samples. The results reveal that the as-synthesized ReMn2O5(Re=Gd, Sm and Yb) are of orthorhombic structure. The effect of NaOH concentration on the structures and size of the final products has been studied, and a possible formation mechanism of ReMn2O5(Re=Gd, Sm and Yb) was proposed based on the experiment results. | |
| Keywords: nanopowder multiferroic hydrothermal synthesis morphology | |
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| 彭建洪,朱刚强,王 娟,刘晓洁,张晓曼,许云华.水热法合成ReMn2O5(Re=Gd，Sm，Yb)纳米粉体[J].无机化学学报,2009,25(6):1067-1072. | |
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