作　　者： ; ; ; ; ; ; ;

机构地区： 湖南大学材料科学与工程学院

出　　处： 《功能材料》 2008年第2期205-208,212,共5页

摘　　要： 用电场辅助电沉积的方法,在多空有序氧化铝模板(AMM)中成功合成了Eu3+掺杂的Y2O3纳米管阵列。扫描电镜和透射电镜观察表明这些稀土化合物纳米管是均匀、连续的、且相互平行。纳米管的外径大约60nm、壁厚3nm。实验中得到的全是纳米管,没有发现纳米丝。XRD、Raman光谱、XPS和荧光光谱表明Eu3+离子确实进入了晶格。大部分Eu3+离子占据缺少反对称中心的C2位置,只有少量的Eu3+离子占据具有对称中心的S6位置。在394nm波长的紫外光激发下,Y2O3纳米管阵列的发射光谱仅在612nm处有一个峰,这对应于Eu3+中电子的5D0→7F2跃迁。当Eu3+与Y3+的摩尔比为7.5%时,纳米管阵列的发光最强。 Ordered Y2O3： Eu^3＋ nanotube arrays embedded in anodic alumina membranes（AAMs） were prepared by an electronic field-assisted deposition method.From the SEM and TEM image,the nanotubes are roughly parallel to each other,and vertically to the AMM surface.The outer diameter of the nanotube was about 60nm and the thickness of the nanotube wall was about 3nm.The Eu^3＋ ions did enter into the lattice from XRD,Raman spectrum and XPS and Eu^3＋ occupied mainly the C2 site and a small part of Eu^3＋ occupied the S6 site in the crystal.The emission spectra of the Y2O3∶Eu^3＋ nanotube arrays consist one main peak at 612nm,which can be assigned to the hypersensitive electron 5^D0→7^F2 transition under 394nm excitation.The intensity of luminescence is best when mol ratio of Eu^3＋ to Y^3＋ is 7.5%.

关 键 词： 纳米管 阵列

领　　域： [化学工程]