期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 112, 期 48, 页码 18882-18888出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp806392a
关键词
-
资金
- Chinese Academy of Sciences, the MOST of China [2003CB314707, 2007CB935502]
- National Natural Science Foundation of China [50572103, 20431030, 50872131, 50702057]
One-dimensional Mn2+-doped Zn2SiO4 rnicrobelts and microfibers were prepared by a simple and cost-effective electrospinning process. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), thermogravimetric and differential thermal analysis (TG-DTA), scanning electron microscopy (SEM), energy-dispersive X-ray spectrum (EDS), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), photoluminescence (PL), and cathodoluminescence (CL) spectra as well as kinetic decays were used to characterize the samples. The XRD and DTA results show that the Zn2SiO4 phase begins to crystallize at 800 degrees C and crystallizes completely around 1000 degrees C. SEM results indicate that the as-prepared microbelts/fibers are smooth, whose diameters decrease with increasing the annealing temperature. The average diameter of the Zn2SiO4:Mn2+ microfibers annealed at 1000 degrees C is 0.32 mu m, and their lengths reach up to several millimeters. The average width and thickness of the Zn2SiO4:Mn2+ microbelts fired at 1000 degrees C are around 0.48 and 0.24 mu m, respectively. Under ultraviolet excitation and low-voltage electron beams (1-3 kV) excitation, the Zn2SiO4:Mn2+ samples show the green emission at 524 nm, corresponding to T-4(1)-(6)A(1) transition of Mn2+. The luminescence intensity and the lifetime have been studied as a function of the doping concentration of Mn2+ in the Zn2SiO4 samples.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据