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化学学报
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化学学报 ›› 2005, Vol. 63 ›› Issue (16): 1515-1519. 上一篇    下一篇

研究论文

纳米结构Bi2Te3化合物的低温湿化学合成

孙霆，朱铁军，赵新兵*   

  1. (浙江大学硅材料国家重点实验室 杭州 310027)
  • 投稿日期:2004-10-09 修回日期:2005-04-12 发布日期:2010-12-10
  • 通讯作者: 赵新兵

Nanostructured Bi2Te3 Synthesized by Low Temperature Aqueous Chemical Route

SUN Ting,ZHU Tie-Jun,ZHAO Xin-Bing*   

  1. (State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027)
  • Received:2004-10-09 Revised:2005-04-12 Published:2010-12-10
  • Contact: ZHAO Xin-Bing

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通过对溶液pH值和颜色以及粉末结构的原位分析, 研究了低温湿化学Bi2Te3纳米粉末合成过程中的化学和物理反应机制. 结果表明, 碱性添加剂对合成Bi2Te3是必要的. 采用65 ℃低温湿化学合成方法, 在添加乙二胺四乙酸二钠(EDTA)的情况下, 制备了Bi2Te3纳米囊. 高分辨电镜观察表明, 这种内空管状结构纳米囊的壁厚约为6 nm.

关键词: Bi2Te3, 纳米囊, 纳米管, 湿化学合成, 热电材料

Chemical and physical reactions during the low temperature aqueous chemical synthesis of nanostructured Bi2Te3 powders were investigated in situ by pH measurement and color observation of the solution and X-ray diffraction analysis of the powders. It was found that Bi2Te3 could be synthesized only in a strong alkaline solution. Bi2Te3 nanocapsules have been synthesized by the aqueous chemical route at 65 ℃ with the addition of disodium ethylenediaminetetraacetate salt. High-resolution transmission electron microscopy observation indicates that the nanocapsules are hollow structured with a wall thickness of about 6 nm.

Key words: Bi2Te3, nanocapsule, nanotube, aqueous chemical synthesis, thermoelectric material