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Rare earth doped nanocrystals and preparation method thereof

A technology of rare earth doping and nano crystals, applied in nanotechnology, nano optics, nanotechnology, etc., can solve problems such as high requirements for production equipment, inability to directly observe the reaction process, unsatisfactory hydrothermal method, etc., and achieve high The effect of luminous efficiency

Active Publication Date: 2020-07-21
CHENGDU AERONAUTIC POLYTECHNIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the hydrothermal method has been widely used, it still has some shortcomings: (1) The reaction cycle is long, and the reaction process is carried out in a closed system. The reaction process cannot be directly observed. (2) Many problems of the hydrothermal method have not yet been satisfactorily explained theoretically; (3) The hydrothermal method reacts under high temperature and high pressure conditions, which requires relatively high production equipment

Method used

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  • Rare earth doped nanocrystals and preparation method thereof
  • Rare earth doped nanocrystals and preparation method thereof
  • Rare earth doped nanocrystals and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A kind of rare earth doped nano crystal, its preparation method comprises the following steps:

[0024] (1) Preparation of rare earth solution: prepare 0.5mol / L Lu(NO 3 ) 3 solution, 0.5mol / L Dy(NO 3 ) 3 solution, 0.04mol / L Tm(NO 3 ) 3 solution and 0.5mol / L of Yb(NO 3 ) 3 solution;

[0025] (2) The sodium hydroxide solution that preparation concentration is 15mol / L promptly takes by weighing 1.2g sodium hydroxide and dissolves in 2mL water, then adds dehydrated alcohol, oleic acid and rare earth solution successively in sodium hydroxide solution, the added anhydrous The volumes of ethanol and oleic acid are 10mL and 20mL respectively; 0.5mol / L Lu(NO 3 ) 3 solution, 0.5mol / L Dy(NO 3 ) 3 solution, 0.04mol / L Tm(NO 3 ) 3 solution and 0.5mol / L of Yb(NO 3 ) 3 The volumes of the solutions were 1.6mL, 0.2mL, 0.25mL and 0.2mL; Dy 3+ The molar weight accounts for 10% of the total rare earth ion molar weight in each rare earth solution (hereinafter referred to as m...

Embodiment 2

[0031] A kind of rare earth doped nano crystal, its preparation method comprises the following steps:

[0032] (1) Preparation of rare earth solution: prepare 0.5mol / L Lu(NO 3 ) 3 solution, 0.5mol / L Dy(NO 3 ) 3 solution, 0.04mol / L Tm(NO 3 ) 3 solution and 0.5mol / L of Yb(NO 3 ) 3 solution;

[0033] (2) The sodium hydroxide solution that preparation concentration is 15mol / L promptly takes by weighing 1.2g sodium hydroxide and dissolves in 2mL water, then adds dehydrated alcohol, oleic acid and rare earth solution successively in sodium hydroxide solution, the added anhydrous The volumes of ethanol and oleic acid are 10mL and 20mL respectively; 0.5mol / L Lu(NO 3 ) 3 solution, 0.5mol / L Dy(NO 3 ) 3 solution, 0.04mol / L Tm(NO 3 ) 3 solution and 0.5mol / L of Yb(NO 3 ) 3 The volumes of the solutions were 1.4mL, 0.4mL, 0.25mL and 0.2mL; Dy 3+ The molar concentration is 20%;

[0034] (3) preparing a NaF solution with a concentration of 0.5mol / L, adding it to the resultant ...

Embodiment 3

[0039] A kind of rare earth doped nano crystal, its preparation method comprises the following steps:

[0040] (1) Preparation of rare earth solution: prepare 0.5mol / L Lu(NO 3 ) 3 solution, 0.5mol / L Dy(NO 3 ) 3 solution, 0.04mol / L Tm(NO 3 ) 3 solution and 0.5mol / L of Yb(NO 3 ) 3 solution;

[0041] (2) The sodium hydroxide solution that preparation concentration is 15mol / L promptly takes by weighing 1.2g sodium hydroxide and dissolves in 2mL water, then adds dehydrated alcohol, oleic acid and rare earth solution successively in sodium hydroxide solution, the added anhydrous The volumes of ethanol and oleic acid are 10mL and 20mL respectively; 0.5mol / L Lu(NO 3 ) 3 solution, 0.5mol / L Dy(NO 3 ) 3 solution, 0.04mol / L Tm(NO 3 ) 3 solution and 0.5mol / L of Yb(NO 3 ) 3 The volumes of the solutions were 1.2mL, 0.6mL, 0.25mL and 0.2mL; Dy 3+ The molar concentration is 30%;

[0042] (3) preparing a NaF solution with a concentration of 0.5mol / L, adding it to the resultant ...

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Abstract

The invention provides a rare earth doped nanocrystal. The preparation method of the rare earth doped nanocrystal comprises the following steps: (1) preparing a rare earth solution; (2) preparing a sodium hydroxide solution with the concentration of 12-20 mol / L, and then successively adding anhydrous ethanol, oleic acid and various rare earth solutions in the sodium hydroxide solution; (3) preparing a NaF solution with the concentration of 0.5 mol / L, adding the NaF solution in a product obtained from the step (2), and stirring for 30-35 minutes; (4) reacting; (5) cleaning; and (6) drying. By doping of Dy3+ or Gd3+, a crystalline phase of NaLuF4 nanocrystalline further can adjust the size of the nanocrystalline, and along with increasing of the concentration of the doped ions, the size of the NaLuF4 nanocrystalline is gradually reduced; and by doping of Dy3+ or Gd3+, transformation of cubic phase NaLuF4 to a hexagonal phase structure can be promoted, and compared with a cubic phase substrate, a hexagonal phase substrate with the same size has higher luminous efficiency.

Description

technical field [0001] The invention belongs to the technical field of nano-biological materials, and in particular relates to a rare-earth-doped nano-crystal and a preparation method thereof. Background technique [0002] Rare earth-doped luminescent materials are ideal optoelectronic functional materials, and have a wide range of applications in the fields of luminescent display, optical communication, optical storage and laser. In recent years, the fluorescent properties of nanoscale up-conversion phosphors doped with rare earth ions have received attention. Compared with traditional micron-sized phosphors, some properties of nanomaterials show obvious differences. These properties are related to the size of the particles. related. In addition, nanoparticles can be adjusted into various shapes according to needs, such as nanospheres, nanotubes, nanosheets, nanowires, etc., and the growth orientation of nanoparticles also affects the properties of compounds. It is very m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/85B82Y20/00B82Y40/00
CPCB82Y20/00B82Y40/00C09K11/7773
Inventor 马亚鑫门正兴郑金辉张苗根李秀鑫
Owner CHENGDU AERONAUTIC POLYTECHNIC
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