Hydrothermal synthesis of lanthanide fluorides LnF3 (Ln = La to Lu) nano-/microcrystals with multiform structures and morphologies

被引：271

作者：

Li, Chunxia

Yang, Jun

Yang, Piaoping

Lian, Hongzhou

Lin, Jun ^{[1
]}

机构：

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

来源：

CHEMISTRY OF MATERIALS | 2008年 / 20卷 / 13期

关键词：

D O I：

10.1021/cm800279h

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Lanthanide fluoride LnF(3) (Ln = La to Lu) nano-/microcrystals with multiform crystal structures (hexagonal and orthorhombic) and morphologies (separated elongated nanoparticles, aggregated nanoparticles, polyhedral microcrystals) were successfully synthesized by a facile, effective, and environmentally friendly hydrothermal method. X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, high-resolution transmission electron microscopy, and photoluminescence spectra were used to characterize the samples. The experimental results indicated that the use of NaBF4 is indispensable for obtaining LnF(3) crystal structures. Furthermore, the organic additive trisodium citrate (Cit(3-)) has an obvious impact on the morphologies of the products to some degree. The possible formation mechanisms for LnF(3) nano-/microcrystals are presented in detail. Additionally, we systematically investigated the luminescence properties of the LnF(3):EU3+ (Ln = La, Gd, and Lu) samples and found an efficient energy transfer from Gd3+ to EU3+ in GdF3:EU3+.

引用

页码：4317 / 4326

页数：10

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