| β-环糊精作为超分子壳制备BaTiO3纳米晶体 |
| Synthesis of BaTiO3 Nanocrystals with β-Cyclodextrin as a Supramolecular Shell |
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| 摘要: 介绍了一种以环境友好的β-环糊精(β-CD)为超分子壳合成纳米钛酸钡的水热方法。经样品X射线衍射(XRD)，透射电镜(TEM)和选区电子衍射(ED)表征证实，合成的钛酸钡为纯立方相的纳米单晶，结晶度好；热重(TG)和红外光谱(IR)研究表明，β-CD在水热条件下自组装为超分子壳的配位或空间位阻作用，导致了BaTiO3晶体生长过程中的快速均匀成核和慢生长。β-CD的添加能明显抑制钛酸钡的粒径增长和颗粒团聚，窄化其粒径分布(平均粒径：42±5 nm)。 |
| 关键词: 环糊精 超分子壳 钛酸钡 纳米晶 |
| 基金项目: |
| Abstract: Well-dispersed barium titanate (BaTiO3) nanocrystals were prepared by a hydrothermal method with β-cyclodextrin(β-CD) as a supramolecular shell. The nanocrystals were identified as cubic phase single-crystal by X-ray diffraction (XRD) and Electron diffraction (ED). The particle size and shape were characterized by transmission electron microscopy (TEM). Infrared spectroscopy analysis (IR) and thermogravimetric analysis (TG) were used to investigate the growth mechanism. Uniform and well-dispersed barium titanate (BaTiO3) nanocrystals were formed due to rapid and homogeneous nuclei and slow growth of BaTiO3 crystals when β-CD was used during the synthesis process as a supramolecular shell because of its coordination and steric hindrance. |
| Keywords: cyclodextrin supramolecular shell barium titanate nanocrystal |
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| 孙晓红,郑春明,章福祥,杨雅莉,关乃佳.β-环糊精作为超分子壳制备BaTiO3纳米晶体[J].无机化学学报,2008,24(1):93-97. |
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