碲化铋纳米棒的制备及其形貌调控研究

以亚碲酸钠、氯化铋为原料,水合肼为还原剂,乙二醇为溶剂,聚乙烯吡咯烷酮为表面活性剂,氢氧化钠作为生长调节和控制剂制备碲化铋纳米棒。探索通过调节氢氧化钠的用量来控制碲化铋纳米棒的生长。利用X射线衍射、扫描电子显微镜、透射电子显微镜来分析碲化铋纳米棒的形貌特征并推导其生长机理。研究表明：在表面活性剂的协助下,随着氢氧化钠用量的增加,碲化铋纳米棒的长度先变长后变短,而纳米棒的直径逐渐减小。为一维碲化铋纳米材料的制备及形貌调控提供了新途径。

Preparation of Bismuth Telluride Nanorod and the Research of Its Morphological Control

Bismuth telluride nanorod was prepared with sodium tellurite and bismuth chloride（raw materials）,hydrazine hydrate（reducing agent）,ethylene glycol（solvent）,PVP（surface active agent）and sodium hydroxide（growth regulation and control agent）.This paper aims to explore to control the growth of bismuth telluride nanorod through adjusting dosage of sodium hydroxide.X-ray diffraction,scanning electron microscopy,transmission electron microscopy were used to analyze morphology features of bismuth telluride nanorod and infer its growth mechanism.The studies show that with the assistance of the surface active agent,the length of bismuth telluride nanorod elongates and then becomes short with the rise in the dosage of sodium hydroxide,while the diameter of the nanorod reduces gradually.This paper provides a new method to prepare one-dimensional telluride bismuth nanometer materials and control the morphology.