Bi_2Te_3纳米颗粒和纳米线的溶剂热合成及组织特征  

Solvothermal synthesis and characterizations of Bi_2Te_3 nano-particles and nanowires

作　　者：吉晓华[1] 赵新兵[1] 张艳华[1] 卢波辉[1] 倪华良[1] 

机构地区：[1]浙江大学硅材料国家重点实验室

出　　处：《中国有色金属学报》2004年第9期1456-1460,共5页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金资助项目(50171064);国家高技术研究发展计划资助项目(2002AA302406)

摘　　要：分别以吡啶、无水乙醇为反应介质,以NaBH4为还原剂,采用溶剂热合成方法,在150℃下反应24h制备了平均晶粒尺寸为1520nm的Bi2Te3纳米粒子。采用相同的合成方法,以去离子水为反应介质,合成了直径为3080nm,长径比大于100的Bi2Te3纳米线。XRD和TEM分析表明,随着溶剂介电常数和极性增加,所生成产物的物相纯度、结晶度增高,晶粒尺寸增大。Bi_2Te_3 nano-particles with the average sizes of 15~20 nm were prepared by solvothermal synthesis at 150 ℃ for 24 h using pyridine or ethanol as the reaction medium and NaBH_4 as the reductant. Bi_2Te_3 nanowires with diameters less than 100 nm and aspect ratios larger than 100 were solvothermally synthesized in distilled water by similar method. XRD and TEM analyses show that the phase purity, crystallization and particle sizes of synthesized powders increase with the increase of the dielectric constant and polarity of the solvent.

关 键 词：BI2TE3 溶剂热合成 纳米颗粒 纳米线 

分 类 号：TN304[电子电信—物理电子学]