反应时间对溶剂热法制备Bi_2Se_3纳米片的影响  

Influence of Reaction Time on Nanoflake-like Bi_2Se_3 Synthesis through Solvothermal Route

作　　者：刘丽君[1] 钟家松[1] 梁晓娟[1] 杨昕宇[1] 刘海涛[1] 向卫东[1] 

机构地区：[1]温州大学,浙江温州325035

出　　处：《稀有金属材料与工程》2010年第S2期368-371,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金资助(50772075)

摘　　要：以BiCl3和Se粉为原料,二甘醇(DEG)作为溶剂,Na2SO3作为还原剂,碱性条件,在160℃的反应温度下,利用溶剂热法成功地合成Bi2Se3纳米片,并研究不同反应时间(20,22,24h)作用下所得产物结构形貌的变化。利用XRD和SEM对所合成产物的晶相结构及表面形貌进行表征。结果显示:在不同反应时间下所合成的粉体均为纯物相(均为六方晶相)的纳米片状Bi2Se3,且反应22h条件下所得产物形貌为大小均一、分散性良好的六边形片状结构,其厚度为10～50nm。并分析片状结构Bi2Se3的形成机制。Bismuth selenide (Bi2Se3) nanoflakes were synthesized in different reaction time, such as 20, 22 and 24 h, by solvothermal method. The process was based on the reactions between bismuth chloride (BiCl3) and elemental selenium (Se) using sodium sulfite (Na2SO3) as a reducing reagent and diethylene glycol (DEG) as solvent at 160 oC under alkaline condition. The effects of the reaction time on the formation of the products were investigated. The products were characterized by X-ray powder diffraction and scanning electron microscopy. The XRD patterns and the SEM images conformably show that the as-prepared Bi2Se3 are all pure hexagonal phase and comprise uniform nanoflakes, although they were prepared in different reaction time. The formation mechanism for flake-like Bi2Se3 structure was studied.

关 键 词：溶剂热 Bi2Se3 纳米片 反应时间 影响 

分 类 号：TB383.1[一般工业技术—材料科学与工程]