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Solvothermal synthesis method for NaLn(MoO4)2 micron crystal

A solvothermal and micro-crystal technology, applied in chemical instruments and methods, luminescent materials, etc., can solve problems such as poor color purity, and achieve the effects of low cost, uniform particle size, and strong production safety

Inactive Publication Date: 2013-06-12
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of poor color purity in rare earth up-conversion luminescent materials prepared by existing methods, and to provide solvothermally synthesized NaLn(MoO 4 ) 2 microcrystalline method

Method used

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  • Solvothermal synthesis method for NaLn(MoO4)2 micron crystal
  • Solvothermal synthesis method for NaLn(MoO4)2 micron crystal
  • Solvothermal synthesis method for NaLn(MoO4)2 micron crystal

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specific Embodiment approach 1

[0011] Specific implementation mode one: the solvothermal synthesis of NaLn(MoO 4 ) 2 The micro-crystal method is realized by the following steps: 1. Under the conditions of temperature 40~90℃ and stirring speed 100~350r / min, the rare earth solution is mixed with molar ratio 1:(0.1~10):(0.1~5) , surfactant solution and Na 2 MoO 4 Mix the solution and continue to stir for 20min~24h, and then put it under the condition of 110~220℃ for solvent heat treatment for 2~48h to obtain substance A; 2. Substance A is washed with distilled water until the pH value of the outflowing solution is 7, and then heated at temperature Vacuum drying at 60-80°C for 3-24h, and then roasting in air at a temperature of 200-900°C and a heating rate of 1-20°C / min for 5min-8h to complete the solvothermal synthesis of NaLn(MoO 4 ) 2 Microcrystalline;

[0012] Wherein the concentration of rare earth solution in step 1 is 0.05~2mol / L; The concentration of surfactant solution is 0.05~2mol / L; Na 2 MoO 4...

specific Embodiment approach 2

[0018] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that in step 1, under the condition that the temperature is 40°C and the stirring speed is 100r / min, the rare earth solution and the surfactant are mixed in a molar ratio of 1:0.1:0.1 solution and Na 2 MoO 4 The solution was mixed and continued to stir for 20 min, and then subjected to solvent heat treatment at a temperature of 110° C. for 2 h to obtain substance A. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0019] Specific embodiment 3: The difference between this embodiment and specific embodiment 1 is that in step 1, under the condition that the temperature is 90°C and the stirring speed is 350r / min, the rare earth solution and the surfactant are mixed in a molar ratio of 1:10:5. solution and Na 2 MoO 4 The solution was mixed and continued to stir for 24 hours, and then subjected to solvent heat treatment at a temperature of 220° C. for 48 hours to obtain substance A. Other steps and parameters are the same as those in Embodiment 1.

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Abstract

The invention discloses a solvothermal synthesis method for a NaLn(MoO4)2 micron crystal, which relates to a method for synthesizing a NaLn(MoO4)2 micron crystal and is used for solving the problem of color purity difference existing in a rare-earth up-conversion luminescent material prepared with the conventional method. The method comprises the following steps of: I, mixing and stirring a rare earth solution, a surfactant solution and a Na2MoO4 solution under the heating condition, and performing solvothermal treatment to obtain a substance A; and II, washing the substance A, drying in vacuumg, and calcining to obtain the solvothermal synthesis NaLn(MoO4)2 micron crystal. The solvothermal synthesis NaLn(MoO4)2 micron crystal has the advantages of uniform particles size, high fluorescentcolor purity, simple preparation process, low cost, simple needed equipment, high production safety and easiness for realizing industrial production.

Description

technical field [0001] The present invention relates to the synthesis of NaLn(MoO 4 ) 2 microcrystalline method. Background technique [0002] Rare earth is an indispensable component of many functional materials such as luminescence, magnetism, and superconductivity. Rare earth optical functional materials are widely used in terminal display, optoelectronic devices, laser technology, and biology. Since R.N.Bhargava et al. reported for the first time in 1994 that ZnS:Mn nanocrystalline particles have higher quantum luminous efficiency than bulk materials, nanoluminescent materials have attracted extensive attention from scholars at home and abroad. Rare earth exhibits many characteristics after nano-nization, such as small size effect, high specific surface effect, quantum effect, extremely strong light, electricity, magnetic properties, superconductivity, high chemical activity, etc., which can greatly improve the performance and function of the material . In particular...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/78
Inventor 王国凤李莹潘凯范乃英田国辉王政强
Owner HEILONGJIANG UNIV