三硒化二铋微/纳米晶的可控合成  

Controllable Synthesis of Bismuth Selenide Micro / Nano Crystals

作　　者：叶成文 宋春燕[1] 张建军[1] 侯娟[1] 廖辉[1] 

机构地区：[1]石河子大学理学院生态物理重点实验室,石河子832003

出　　处：《人工晶体学报》2015年第6期1614-1618,共5页Journal of Synthetic Crystals

基　　金：石河子大学科学技术研究发展计划优秀青年项目(2012ZRKXYQ07)

摘　　要：采用溶剂热法,在N,N-二甲基甲酰胺和乙二醇的混合溶剂中,无碱条件下,通过添加适量聚乙烯吡咯烷酮（PVP）,成功制备出硒化铋微/纳米晶。采用X射线衍射（XRD）、扫描电子显微术（SEM）、透射电子显微术（TEM）、选区电子衍射（SAED）、高分辨透射电镜（HRTEM）和X射线光电子能谱（XPS）对产物进行了表征,结果表明获得了Bi2Se3单晶纳米片结构,边长约为300~1100 nm,厚度约为200~500 nm,讨论了PVP添加量对产物形貌的影响,并研究了六方片状硒化铋产物的产生机理。Bi2Se3 micro / nano crystals were successfully synthesized via a solvothermal route using a mixed solvent of N,N-Dimethylformamide（ DMF） and ethylene glycol（ EG） without alkalis and with the assistant of polyvinyl pyrrolidone（ PVP）. The products were characterized by X-ray powder diffraction（ XRD）,scanning electron microscopy（ SEM）,transmission electron microscope（ TEM）,selected area diffraction（ SAED）, high resolution transmission electronic microscopy（ HRTEM） and X-ray photoelectron spectroscopy（ XPS）. The results show that the obtained Bi2Se3 nanoplates are single crystals and have regular hexagonal shape with 300-1100 nm in lateral length and about 200-500 nm in thickness. The influences of PVP amount on the products were discussed. The formation mechanism of the Bi2Se3 nanoplates with hexagonal shape was proposed.

关 键 词：Bi2Se3 微/纳米晶 溶剂热法 PVP 

分 类 号：TB3[一般工业技术—材料科学与工程]