静电纺丝法制备Y_2O_3纳米纤维与表征  

Preparation and Characterization of Y_2O_3 Nanofibers via Electrospinning

作　　者：刘莉[1] 董相廷[1] 王进贤[1] 车红锐[1] 

机构地区：[1]长春理工大学化学与环境工程学院,吉林长春130022

出　　处：《中国稀土学报》2008年第4期400-404,共5页Journal of the Chinese Society of Rare Earths

基　　金：吉林省科技发展计划项目(20070402;20060504;20040125);吉林省教育厅科技计划项目(2006JYT05);吉林省环保局科技项目(2006-24)资助

摘　　要：采用静电纺丝法制备了PVA/Y(NO3)3复合纳米纤维,在适当的温度下进行热处理,得到Y2O3纳米纤维。利用XRD,SEM,TG-DTA,FTIR等现代分析手段对样品进行了表征。XRD分析表明,PVA/Y(NO3)3复合纤维为无定型,焙烧温度在600℃以上得到晶态单相的Y2O3纳米纤维,属于立方晶系,空间群为Ia3。SEM分析表明,PVA/Y(NO3)3复合纤维表面光滑,平均直径为110 nm。焙烧温度对Y2O3纳米纤维的形成有重要影响。600℃焙烧得到的Y2O3纳米纤维的平均直径约50 nm,900℃焙烧得到的Y2O3纳米纤维由纳米颗粒堆积而成,部分已断裂。TG-DTA和FTIR分析表明,PVA,Y(NO3)3以及水分在600℃以上时完全分解挥发,最终样品为晶态单相的Y2O3纳米纤维。PVA/Y （NO3）3 composite nanofibers were fabricated by an electrospinning method, and Y2O3 nanofibres could be acquired by calcination of the PVA/Y（NO3）3 composite nanofibers at appropriate firing temperature. The as-prepared samples were characterized with XRD, SEM, TG-DTA and FTIR. The XRD analysis indicated that PVA/Y （NO3）3 composite nanofibers were amorphous structure, and crystalline Y2O3 with single-phase were obtained when calcination temperature was higher than 600℃. The structure of the prepared Y2O3 nanofibers were cubic with space group Ia3. The SEM micrographs revealed that the mean diameter of the PVA/Y（NO3）3 composite nanofibets was 110 nm with smooth surface. The calcination temperature had an important influence on the forma- tion of Y2O3 nanofibers. The average diameter of Y2O3 nanofibers obtained at 600 ℃ was ca. 50 nm, while the Y2O3 nanofibers acquired at 900℃ were composed of nanoparticles, and some of the Y2O3 nanofibers were broken. The TG-DTA and FTIR analysis showed that PVA, Y（NO3）3 and water in the PVA/Y（NO3）3 composite nanofibers totally decomposed and volatilized above 600℃, and final product was crystalline Y2O3 nanofibers with single-phase.

关 键 词：静电纺丝 纳米纤维 Y2O3 稀土 

分 类 号：O614.33[理学—无机化学]