Hydrothermal preparation and luminescence of LaF3:Eu3+ nanoparticles.
LaF3:Eu3+ nanoparticles were prepared by a simple hydrothermal process at low temperature and characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and fluorescence spectrum. Well-dispersed nanoparticles with an average size of 30 nm and a hexagonal shape were obtained. The influences of reaction temperature and time on the preparation and luminescence of LaF3:Eu3+ nanoparticles were investigated. Luminescent quenching occurred at a much higher concentration ( approximately 25mol%) and stronger luminescent intensity than in bulk LaF3:Eu3+. Fluorescence intensity of the LaF3:Eu3+ nanoparticles varied remarkably with calcination temperatures. It was found that samples without any further calcinations can emit quite strong fluorescence.
Meng
Jian-Xin
JX
Department of Chemistry, Institute of Nano-chemistry, Jinan University, Guangzhou 510632, China. tmjx@jnu.edu.cn
Zhang
Mao-Feng
MF
Liu
Ying-Liang
YL
Man
Shi-Qing
SQ
D005063:Europium / Q000737:chemistry*; D005459:Fluorides / Q000737:chemistry*; D006358:Hot Temperature; D007811:Lanthanum / Q000737:chemistry*; D049449:Luminescence; D046529:Microscopy, Electron, Transmission; D053758:Nanoparticles / Q000737:chemistry*; D010316:Particle Size; D014961:X-Ray Diffraction
C083668:lanthanum trifluoride; D005063:Europium; D007811:Lanthanum; D005459:Fluorides