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Up-conversion NaYF4 nanopowder self-assembled film preparation method

A technology of nano-powder and self-assembled film, applied in nanotechnology, chemical instruments and methods, rare earth metal compounds, etc. Convert fluorescence performance and other issues to achieve the effect of improving fluorescence performance

Inactive Publication Date: 2018-09-21
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Most of the existing up-conversion thin film preparation methods adopt the disorderly arrangement of powders, which directly affects the morphology and crystallinity of the film grains, thereby limiting the up-conversion fluorescence performance of the film, which is not conducive to the actual up-conversion film. application, so it is necessary to find a new up-conversion film preparation method

Method used

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Embodiment 1

[0028] A kind of up conversion NaYF that the present invention proposes 4 The preparation method of nanopowder body self-assembled film, comprises the following steps:

[0029] A kind of up conversion NaYF that the present invention proposes 4 The preparation method of nanopowder body self-assembled film, comprises the following steps:

[0030] S1. Preparation of rare earth oleic acid complex: add yttrium chloride hexahydrate, oleic acid, and 1-octadecene into the reaction vessel according to the ratio of 10mol:5mol:80L, and feed N 2 , heated to 80°C, and stirred for 60 minutes to obtain a uniform rare earth oleic acid complex solution, which was cooled to a nucleation temperature of 60°C;

[0031] S2, preparation of NaF ion solution: NH 4 F and NaOH were added to methanol and ultrasonicated to obtain a uniform NaF solution, in which, NH 4 The ratio of F, NaOH and methanol is 10mol: 4mol: 80L;

[0032] S3, preparation of crystal nuclei: in N 2 under protection, follow th...

Embodiment 2

[0037] A kind of up conversion NaYF that the present invention proposes 4 The preparation method of nanopowder body self-assembled film, comprises the following steps:

[0038] S1. Preparation of rare earth oleic acid complex: add yttrium chloride hexahydrate, oleic acid, and 1-octadecene into the reaction vessel according to the ratio of 10mol:5mol:80L, and feed N2 , heated to 80°C, and stirred for 60 minutes to obtain a uniform rare earth oleic acid complex solution, which was cooled to a nucleation temperature of 60°C;

[0039] S2, preparation of NaF ion solution: NH 4 F and NaOH were added to methanol and ultrasonicated to obtain a uniform NaF solution, in which, NH 4 The ratio of F, NaOH and methanol is 10mol: 4mol: 80L;

[0040] S3, preparation of crystal nuclei: in N 2 under protection, follow the F - with Y 3+ The molar ratio is 4:1, the NaF solution is added dropwise to the rare earth oleic acid complex solution, stirred and reacted for 60 minutes to form crystal...

Embodiment 3

[0045] A kind of up conversion NaYF that the present invention proposes 4 The preparation method of nanopowder body self-assembled film, comprises the following steps:

[0046] S1. Preparation of rare earth oleic acid complex: add yttrium chloride hexahydrate, oleic acid, and 1-octadecene into the reaction vessel according to the ratio of 10mol:5mol:80L, and feed N 2 , heated to 80°C, and stirred for 60 minutes to obtain a uniform rare earth oleic acid complex solution, which was cooled to a nucleation temperature of 60°C;

[0047] S2, preparation of NaF ion solution: NH 4 F and NaOH were added to methanol and ultrasonicated to obtain a uniform NaF solution, in which, NH 4 The ratio of F, NaOH and methanol is 10mol: 4mol: 80L;

[0048] S3, preparation of crystal nuclei: in N 2 under protection, follow the F - with Y 3+ The molar ratio is 4:1, the NaF solution is added dropwise to the rare earth oleic acid complex solution, stirred and reacted for 60 minutes to form cryst...

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Abstract

The invention relates to the technical field of nanopowder film preparation and discloses an up-conversion NaYF4 nanopowder self-assembled film preparation method. The method includes steps: preparinga rare earth oleic acid coordination compound, preparing NaF ion solution, preparing crystal nucleus, enabling crystal nucleus growth, preparing NaYF4 nanopowder and preparing a self-assembled film.By adoption of a two-phase interface self-assembly method, the up-conversion nanopowder self-assembled film is prepared, a layered two-phase structure is formed by taking the advantage of polarity andsurface tension differences of ethylene glycol and cyclohexane, NaYF4 nanopowder dispersed in upper-phase cyclohexane spontaneously form an orderly close-packed single-layer structure under the driving action of interface energy through volatilization of upper-phase cyclohexane, and accordingly special electric performances, photoelectric performances and magnetic performances different from those of disorderly stacked nanopowder are achieved, and design of novel solid materials can be promoted hopefully.

Description

technical field [0001] The invention relates to the technical field of nano-powder film preparation, in particular to a preparation method for an up-conversion NaYF4 nano-powder self-assembled film. Background technique [0002] Rare earth ion up-conversion luminescence technology can absorb low-energy infrared light and convert it into visible light or even higher-energy ultraviolet light. This nonlinear optical process is an anti-Stokes process. As early as 1959, N.Bloembergen and M.R.Brown proposed that anti-Stokes emission with energy 10-100 times kT higher than the excitation light could be generated by absorbing multiple low-energy photons. In 1966, Professor F.Auzel of France doped rare earth ions in ytterbium sodium tungstate glass, discovered anti-Stokes emission based on energy conversion between two ions, and proposed the anti-Stokes effect of rare earth ions for the first time and "up-conversion" luminous views. Since then, up-conversion materials have graduall...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F17/00B82Y40/00C03C17/22
CPCB82Y40/00C01F17/36C01P2004/03C03C17/22C03C2217/285C03C2218/111
Inventor 蔡桂凡石永倩江海波
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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