Tunable Luminescence in Monodisperse Zirconia Spheres

被引：72

作者：

Zhang, Cuimiao

Li, Chunxia

Yang, Jun

Cheng, Ziyong

Hou, Zhiyao

Fan, Yong

Lin, Jun ^{[1
]}

机构：

[1] Chinese Acad Sci, State Key Lab Rare Earth Resource Utilizat, Changchun Inst Appl Chem, Changchun 130022, Peoples R China

来源：

LANGMUIR | 2009年 / 25卷 / 12期

基金：

中国国家自然科学基金;

关键词：

WHITE-LIGHT EMISSION; PHOTOLUMINESCENCE; PHOSPHORS; PURE; SIO2; UREA;

D O I：

10.1021/la900146y

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In this article, monodisperse spherical zirconia (ZrO2) particles with a narrow size distribution were prepared by the controlled hydrolysis of zirconium butoxide in ethanol, followed by heat treatment in air at low temperature from 300 to 500 degrees C. X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, thermogravimetric and differential thermal analysis (TG/DTA), scanning electron microscopy (SEM), transmission electron microscopy (TEM), photoluminescence (PL) spectra, kinetic decay, and electron paramagnetic resonance were used to characterize the samples. The experimental results indicate that the annealed ZrO2 samples exhibit broad, intense visible photoluminescence. The annealing temperature is indispensable for the luminescence of the obtained ZrO2 particles. The emission colors of the ZrO2 samples can be tuned from blue to nearly white to dark orange by varying the annealing temperature. According to the spectral analysis, luminescence lifetimes, and EPR results, the luminescent centers might be attributed to the carbon impurities in the ZrO2 samples. The possible luminescence mechanism for ZrO2 samples has been presented in detail.

引用

页码：7078 / 7083

页数：6

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