以TiO_2∶Eu纳米颗粒为原材料,采取水热和高温(700 ℃)退火的方法合成了铕掺杂钛纳米棒(简写成Eu∶Ti 纳米棒).其结构和光学性能用场发射扫描电镜,显微共聚焦激光拉曼光谱,稳态荧光以及寿命谱进行表征.场发射扫描电镜图片显示纳米棒的直径大约为30 nm,长度大约为300~600 nm.显微共聚焦激光拉曼光谱测试结果表明纳米棒中含有部分锐钛矿结构.稳态荧光光谱显示纳米棒的发光强度明显比纳米颗粒的强度强,而且发光谱线也不同.检测Eu~(3+)的~5D_0→~7F_2跃迁(发光峰位在612 nm)的发光强度,采用394 nm激发,发现纳米棒的寿命比纳米颗粒的长120 μs.
In this manuscript, Eu doped in TiO_2 nanorods (Eu∶Ti nanorods) was prepared by hydrothermal and high temperatures annealing methods using TiO_2∶Eu nanoparticle(molar ratio TiO_2∶Eu =100∶1,the particle size was about 10-30 nm,anatase)as raw materials. The structure and optical properties of the Eu∶Ti nanorods were characterized by field emission scanning electronic microscopy (FE-SEM) and confocal microscope Raman spectrometer. The FE-SEM image shows the nanorods diameter is 30 nm and length is 300-600 nm. A part of anatase phase was also observed in nanorods by Raman spectra. The steady-state/lifetime spectrofluorometer was used to record the emission spectra and the lifetime curves of the samples. It is obviously that the fluorescence spectra of the Eu∶Ti nanorods is different from the nanoparticle, and the emission intensity of the former is stronger than later. By monitoring the ~5D_0→~7F_2 transition intensity of the Eu~(3+) excited by the 394 nm line, it is found that the lifetime of nanorods is longer 120 μs than the nanoparticle.
参考文献
| [1] | Nogami M;Abe Y .Properties of Sol-gel-derived Al_2O_3-SiO_2 Glasses Using Eu~(3+) Ion Fluorescence Spectra[J].Journal of Non-Crystalline Solids,1996,197:73-78. |
| [2] | Fujita K.;Hirao K.;Soga N.;Tanaka K. .Room-temperature persistent spectral hole burning of EU3+ in sodium aluminosilicate glasses[J].Optics Letters,1998(7):543-545. |
| [3] | 刘金霞.ZrO2：Tb3+纳米晶的制备与发光研究[J].人工晶体学报,2008(02):431-434. |
| [4] | Zhou PL;Yu XB;Yang LZ;Yang SP;Gao WJ .Synthesis of Y2Si2O7 : Eu nanocrystal and its optical properties[J].Journal of Luminescence: An Interdisciplinary Journal of Research on Excited State Processes in Condensed Matter,2007(2):241-244. |
| [5] | Phan TL;Phan MH;Vu N;Anh TK;Yu SC .Luminescent properties of Eu-doped Y2O3 nanophosphors[J].Physica Status Solidi, A. Applied Research,2004(9):2170-2174. |
| [6] | Hikita T;Sado T;Kawano K .Photoluminescence Characteristics of Rare Earth Ion-implanted SiO_2/Si[J].Journal of Alloys and Compounds,2006,408-412:886. |
| [7] | 曾庆光,张增明,丁泽军,王忆,盛业青,罗观和,赖绍全.多孔状的Eu：Y2O3/SiO2的合成与光学性能[J].电子显微学报,2008(01):16-20. |
| [8] | Yu LX;Song HW;Lu SZ;Liu ZX;Yang LM .Influence of shape anisotropy on photoluminescence characteristics in LaPO4 : Eu nanowires[J].Chemical Physics Letters,2004(4-6):384-388. |
| [9] | Song H W;Yu L X;Lu S Z et al.Remarkable Differences in Photoluminescent Properties between LaPO_4:Eu One-dimensional Nanowires and Zero-dimensional Nanoparticles[J].Applied Physics Letters,2004,85:470. |
| [10] | Zeng Q G;Ding Z J;Zhang Z M .Synthesis,Structure and Optical Properties of Eu~(3+)/TiO_2 Nanocrystals at Room Temperature[J].Journal of Luminescence,2006,118:301. |
| [11] | Hodos M;Horvath E;Haspel H;Kukovecz A;Konya Z;Kiricsi I .Photo sensitization of ion-exchangeable titanate nanotubes by CdS nanoparticles[J].Chemical Physics Letters,2004(4-6):512-515. |
| [12] | Sun X;Li Y D .Synthesis and Characterization of Ion-exchangeable Titanate Nanotubes[J].Chemistry-A European Journal,2003,9(10):2229-2238. |
| [13] | Kasuga T.;Hoson A.;Sekino T.;Niihara K.;Hiramatsu M. .Titania nanotubes prepared by chemical processing[J].Advanced Materials,1999(15):1307-1311. |
| [14] | 李丹,吕少哲,张继森,刘俊业,王海宇,孙聆东,黄世华.Eu3+：Y态效应2O3纳米微粒的尺寸效应和表面的研究[J].发光学报,2000(02):134-138. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%