单晶钛酸铋纳米片的XPS和Raman特性  

The XPS and Raman Characteristics of Single-Crystal Bismuth Titanate Nanoflakes

作　　者：袁颖[1] 胡永明[1] 胡正龙[1] 尤晶[1] 顾豪爽[1] 

机构地区：[1]湖北大学铁电压电材料与器件湖北省重点实验室,物理学与电子技术学院,湖北武汉430062

出　　处：《稀有金属材料与工程》2007年第A02期95-98,共4页Rare Metal Materials and Engineering

基　　金：湖北省创新团队项目;国家自然科学基金资助(50572026)

摘　　要：以Bi(NO_3)_3·5H_2O和Ti(OC_4H_9)_4为原料,NaOH为矿化剂,采用水热法制备了形貌规则的单晶Bi_4Ti_3O_(12)纳米片。X射线衍射(XRD)结果表明,所合成的产物为正交相层状钙钛矿结构的Bi_4Ti_3O_(12)。场发射扫描电子显微镜(FESEM)研究显示:样品是由大量边缘尺寸接近200 nm,厚度约为15 nm的片状结构组成。利用X射线光电子能谱(XPS)研究产物的化学组分和价态分布。室温拉曼光谱研究表明,Bi_4Ti_3O_(12)纳米片的声子寿命和热稳定性低于相应的块体材料。Single-crystal bismuth titanate （Bi4Ti3O12） nanoflakes have been fabricated by hydrothermal method, using Bi（NO3）3·5H2O and Ti（OC4Hg）4 as starting materials and NaOH as mineralizer. XRD results show that the Bi4Ti3O12 nanoflakes have an orthorhombic perovskite structure without any other impurity phase. FESEM image exhibits that the nanoflakes are made up of large quantity nanoflakes with a rim size of about 200 am and thickness of about 15 nm. The chemical compositions and valance state of samples was determined by X-ray photoelectron spectrometer （XPS）. Raman spectroscopy study of the nanoflakes at room temperature shows that the Bi4Ti3O12 nanoflakes have lower phonon lifetime and thermo-stability compared to that of bulk materials.

关 键 词：BI4TI3O12 水热法 纳米片 XPS RAMAN 

分 类 号：TB383.1[一般工业技术—材料科学与工程]