单分散氧化锆球中的可调谐发光

Tunable luminescence in monodisperse zirconia spheres.

作者信息

Zhang Cuimiao, Li Chunxia, Yang Jun, Cheng Ziyong, Hou Zhiyao, Fan Yong, Lin Jun

机构信息

State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People's Republic of China.

出版信息

Langmuir. 2009 Jun 16;25(12):7078-83. doi: 10.1021/la900146y.

DOI:10.1021/la900146y

PMID:19253958

Abstract

In this article, monodisperse spherical zirconia (ZrO(2)) 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 ZrO(2) samples exhibit broad, intense visible photoluminescence. The annealing temperature is indispensable for the luminescence of the obtained ZrO(2) particles. The emission colors of the ZrO(2) 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 ZrO(2) samples. The possible luminescence mechanism for ZrO(2) samples has been presented in detail.

摘要

在本文中，通过在乙醇中对丁醇锆进行受控水解，随后在300至500摄氏度的低温空气中进行热处理，制备了具有窄尺寸分布的单分散球形氧化锆（ZrO₂）颗粒。使用X射线衍射（XRD）、傅里叶变换红外（FTIR）光谱、热重和差热分析（TG/DTA）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、光致发光（PL）光谱、动力学衰减和电子顺磁共振对样品进行了表征。实验结果表明，退火后的ZrO₂样品表现出宽泛、强烈的可见光致发光。退火温度对于所获得的ZrO₂颗粒的发光是必不可少的。通过改变退火温度，ZrO₂样品的发射颜色可以从蓝色调至近白色再到深橙色。根据光谱分析、发光寿命和电子顺磁共振结果，发光中心可能归因于ZrO₂样品中的碳杂质。详细阐述了ZrO₂样品可能的发光机制。