期刊
CRYSTENGCOMM
卷 17, 期 40, 页码 7762-7771出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ce01292a
关键词
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资金
- National Natural Science Foundation of China [51302229, 21204074]
- Natural Science Foundation [cstc2012jjA50009]
- Fundamental Research Funds for the Central Universities [XDJK2013B016, 2362015XK10]
- China Postdoctoral Science Foundation funded project [2012M521663]
- Research Fund for the Doctoral Program of Higher Education of China [20120182120018]
- Scientific Research Foundation for Returned Scholars
- Postdoctoral Scientific Research Project Special Funding of Chongqing [Xm201312]
- Foundation of State Key Laboratory of Rare Earth Resources Utilization [RERU2013015]
- Ministry of Education of China (46th)
Hexagonal NaTbF4 microplates have been successfully synthesized through a simple hydrothermal method. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), inductively coupled high frequency plasma atomic emission spectroscopy (ICP-AES), photoluminescence (PL) and luminescence decay curves were used to characterize the samples. By optimizing the experimental conditions, such as Na-citrate consumption, pH value, reaction time and hydrothermal temperature, we obtained the samples with different components (NaTbF4, TbF3), crystal phases (alpha-NaTbF4, beta-NaTbF4), and morphologies. A possible formation mechanism for the samples with different structures was proposed. In addition, the monodisperse hexagonal NaTbF4 microplates, which can be used as an excellent host lattice for Eu3+ ions, and the multicolor luminescence properties of NaTbF4 with various Eu3+ doping concentrations have been studied. At the same time, the energy transfer from Tb3+ to Eu3+ in NaTbF4: x% Eu3+ (x = 0-1) was also investigated. The color of the NaTbF4: x% Eu3+ (x = 0-1) samples can be varied from green to red by adjusting the doping concentration of Eu3+, which exhibits a good advantage of multicolor emissions in the visible region, and endows this material with potential application in many fields, such as light display systems, optoelectronic devices and biological imaging. Such a simple synthetic method is also useful for the synthesis of other complex rare earth fluorides with hexagonal architectures.
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