Method for preparing polychromatic luminous nanocrystalline of monodisperse NaYF4

A technology of sodium tetrafluoroyttrium and nanocrystals is applied in the field of preparation of monodisperse sodium tetrafluoroyttrium multicolor luminescent nanocrystals to achieve the effect of good dispersibility

Inactive Publication Date: 2011-04-27
BEIJING UNIV OF CHEM TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] In recent years, there have been many reports on the crystal-controlled synthesis of up-conversion fluorescent materials, and sodium tetrafluoroyttrium nanocrystals with various shapes have been prepared under different conditions (Koen Binnemans.Chemical Reviews, 2009, 109, 4343; Yu Wang and Langping Tu, J.Phys.Chem..C 2009, 113, 7164-7169; Zhengquan Li, Yong Zhang, and ShanJiang.Adv.Mater.2008, 20, 4765-4769.), also about controlling the shape and size of nanocrystals The study of size and crystal phase (Fan Zhang, Jing Li, and Dongyuan Zhao.Chem.Eur.J.2009, 15, 11010-11019;), but can easily and quickly obtain the desired size, with strong up-conversion ability The preparation method of monodisperse sodium tetrafluoroyttrium multicolor luminescent nanocrystals with hexagonal phase morphology has not been reported yet

Method used

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  • Method for preparing polychromatic luminous nanocrystalline of monodisperse NaYF4
  • Method for preparing polychromatic luminous nanocrystalline of monodisperse NaYF4
  • Method for preparing polychromatic luminous nanocrystalline of monodisperse NaYF4

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Embodiment 1

[0026] 1. Take by weighing 0.04mol yttrium nitrate hexahydrate, 0.0075mol ytterbium nitrate hexahydrate and 0.0025mol erbium nitrate hexahydrate respectively with an electronic balance, make 100ml uniform solution with deionized water, and its total rare earth concentration is 0.5mol / L, And the molar ratio between the rare earth elements is Y:Yb:Er=80:15:5;

[0027] 2. Add 3ml of oleic acid, 4ml of absolute ethanol, dropwise 6ml of 1.5mol / L NaOH aqueous solution, 15ml of cyclohexane, and 10ml of the rare earth solution prepared in step 1 into a 50ml reaction kettle. After fully stirring, put it into the kettle React at 80°C for 4 hours. After the reaction is over, use a 25ml pipette to separate the water and oil phases, discard the water phase in the reaction solution, and dilute the upper oil phase to 20ml with cyclohexane to obtain rare earth precursors. body

[0028] 3. Slowly add 3ml of hydrofluoric acid, 3ml of cyclohexane, and finally 7ml of absolute ethanol dropwise in...

Embodiment 2

[0033] 1. Take by weighing 0.025mol yttrium nitrate hexahydrate, 0.0249mol ytterbium nitrate hexahydrate and 0.0001mol erbium nitrate hexahydrate respectively with an electronic balance, and make 100ml uniform solution with deionized water, and its total rare earth concentration is 0.5mol / L, And the molar ratio between the rare earth elements is Y:Yb:Er=50:49.8:0.2;

[0034] 2. Add 3ml of oleic acid, 4ml of absolute ethanol, dropwise 6ml of 1.5mol / L NaOH aqueous solution, 15ml of cyclohexane, and 10ml of the rare earth solution prepared in step 1 into a 50ml reaction kettle. After fully stirring, put it into the kettle React at 80°C for 4 hours. After the reaction is over, use a 25ml pipette to separate the water and oil phases, discard the water phase in the reaction solution, and dilute the upper oil phase to 20ml with cyclohexane to obtain rare earth precursors. body

[0035] 3. Slowly add 3ml of hydrofluoric acid, 3ml of cyclohexane, and finally 7ml of absolute ethanol dr...

Embodiment 3

[0040] 1. Take by weighing 0.03mol yttrium nitrate hexahydrate, 0.0199mol ytterbium nitrate hexahydrate and 0.0001mol erbium nitrate hexahydrate respectively with an electronic balance, make 100ml uniform solution with deionized water, and its total rare earth concentration is 0.5mol / L, And the molar ratio between the rare earth elements is Y:Yb:Er=60:39.8:0.2;

[0041] 2. Add 3ml of oleic acid, 4ml of absolute ethanol, dropwise 6ml of 1.5mol / L NaOH aqueous solution, 15ml of cyclohexane, and 10ml of the rare earth solution prepared in step 1 into a 50ml reaction kettle. After fully stirring, put it into the kettle React at 80°C for 4 hours. After the reaction is over, use a 25ml pipette to separate the water and oil phases, discard the water phase in the reaction solution, and dilute the upper oil phase to 20ml with cyclohexane to obtain rare earth precursors. body

[0042] 3. Slowly add 3ml of hydrofluoric acid, 3ml of cyclohexane, and finally 7ml of absolute ethanol dropwis...

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Abstract

The invention discloses a method for preparing polychromatic luminous nanocrystalline of monodisperse NaYF4, belonging to the technical field of the inorganic nanophase material preparation. The prepared NaYF4 nanocrystalline is in a uniform hexagonal shape, the diameter of the NaYF4 nanocrystalline is about 40nm, and the width of NaYF4 nanocrystalline is 25nm. The NaYF4 nanocrystalline is distributed in a monocrystal mode. The NaYF4 nanocrystalline has favorable monodispersion and strong upconversion fluorescence performance. Through adjusting the doped chemical and the proportion of rare earth, the NaYF4 nanocrystalline capable of sending different colors of fluorescence, such as red fluorescence, yellow fluorescence, blue fluorescence, green fluorescence, and the like under the excitation of 980 nm infrared light is debugged, and the NaYF4 nanocrystalline is used in the research on biomedical imaging.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic nanometer materials, in particular to a method for preparing monodisperse sodium tetrafluoroyttrium multicolor luminescent nanocrystals. technical background [0002] Rare earth elements are lanthanides and scandium Sc and yttrium Y, which belong to Group IIIB, a general term for a total of 17 elements. Due to the special properties of rare earth elements, such as the electron layer configuration with similar electron energy levels to the 4f inner layer, high valence, large radius, strong polarization, active chemical properties, and hydrolysis, it has many characteristics in optical materials and other aspects. It is called It is a magical "treasure house of new materials". Compared with organic dyes and semiconductor quantum dots, inorganic rare earth luminescent materials have many advantages, such as narrow luminescent spectral band, high chemical stability, high conversion e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F17/00C09K11/85B82Y40/00
Inventor 汪乐余邓明亮
Owner BEIJING UNIV OF CHEM TECH
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