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A kind of up-conversion nanocrystal-zeolite composite material and its preparation method and application

A composite material and nanocrystal technology, which is applied in the field of upconversion nanocrystal-zeolite composite material and its preparation, can solve the problems of limited application, difficulty in high-intensity upconversion luminescence, etc., achieve high-efficiency upconversion luminescence, and reduce non-radiative transition , reducing the effect of non-radiative transitions

Active Publication Date: 2022-05-20
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The phonon energy of the doped matrix is ​​very important to obtain efficient up-conversion luminescence. Due to the high phonon energy of the zeolite matrix, it is difficult to obtain high-intensity up-conversion luminescence by direct doping of rare earth ions, which limits its application.

Method used

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  • A kind of up-conversion nanocrystal-zeolite composite material and its preparation method and application
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  • A kind of up-conversion nanocrystal-zeolite composite material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Take rare earth compound 0.8mmol YCl 3 ·6H 2 O, 0.02mmol ErCl 3 ·6H 2 O and 0.18mmol YbCl 3 ·6H 2 O, added to a mixed solution of 6mL of oleic acid and 15mL of 1-octadecene, heated and stirred at 160°C for 40 minutes under an argon atmosphere, after the rare earth was dissolved, stopped heating and naturally cooled to room temperature;

[0038](2) 0.3 g of FAU Y-type zeolite powder was added to the solution obtained in (1), and stirred at room temperature for 1.5 hours;

[0039] (3) 2.5mmol sodium oleate and 4mmol ammonium fluoride were dissolved in 10mL methanol respectively, and the obtained two methanol solutions were dropped into the solution obtained in (2) successively, and stirred and heated at 65°C for 50min, until the methanol is exhausted;

[0040] (4) heating the solution obtained in (3) at 280°C for 30min under argon atmosphere, and then cooling to room temperature;

[0041] (5) centrifuge the solution obtained in (4), disperse the solid obtained ...

Embodiment 2

[0047] (1) Take rare earth compound 0.78mmol YCl 3 ·6H 2 O, 0.02mmol HoCl 3 ·6H 2 O and 0.20 mmol YbCl 3 ·6H 2 O, added to a mixed solution of 6mL of oleic acid and 15mL of 1-octadecene, heated and stirred at 160°C for 40 minutes under an argon atmosphere, after the rare earth was dissolved, stopped heating and naturally cooled to room temperature;

[0048] (2) adding 0.2 g of FAU X-type zeolite powder to the solution obtained in (1), and stirring at room temperature for 1.5 hours;

[0049] (3) 2.5mmol sodium oleate and 4mmol ammonium fluoride were dissolved in 10mL methanol respectively, and the obtained two methanol solutions were dropped into the solution obtained in (2) successively, and stirred and heated at 65°C for 50min, until the methanol is exhausted;

[0050] (4) heating the solution obtained in (3) at 280°C for 30min under argon atmosphere, and then cooling to room temperature;

[0051] (5) centrifuge the solution obtained in (4), disperse the solid obtained...

Embodiment 3

[0056] (1) Take rare earth compound 0.67mmol YCl 3 ·6H 2 O, 0.03mmol TmCl 3 ·6H 2 O and 0.30 mmol YbCl 3 ·6H 2 O, added to a mixed solution of 6mL of oleic acid and 15mL of 1-octadecene, heated and stirred at 160°C for 40 minutes under an argon atmosphere, after the rare earth was dissolved, stopped heating and naturally cooled to room temperature;

[0057] (2) 0.1 g of FAU Y-type zeolite powder was added to the solution obtained in (1), and stirred at room temperature for 1.5 hours;

[0058] (3) 2.5mmol sodium oleate and 4mmol ammonium fluoride were dissolved in 10mL methanol respectively, and the obtained two methanol solutions were dropped into the solution obtained in (2) successively, and stirred and heated at 65°C for 50min, until the methanol is exhausted;

[0059] (4) heating the solution obtained in (3) at 280°C for 30min under argon atmosphere, and then cooling to room temperature;

[0060] (5) centrifuge the solution obtained in (4), disperse the solid obtain...

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Abstract

The present invention relates to an up-conversion nanocrystal-zeolite composite material and its preparation method and application. The composite material includes zeolite and a rare earth-doped up-conversion nanocrystal grown in the porous structure of the zeolite. The rare-earth-doped up-conversion nanocrystal is NaRE 1 f 4 :xYb 3+ ,yRE 2 3+ , where RE 1 for Y or Gd, RE 2 is Tm, Er or Ho, 0

Description

technical field [0001] The invention belongs to the technical field of up-conversion luminescent materials, and relates to an up-conversion nanocrystal-zeolite composite material and a preparation method and application thereof. Background technique [0002] Zeolite is a kind of aluminosilicate with microporous structure composed of silicon-oxygen tetrahedron and aluminum-oxygen tetrahedron. Some cations such as H + , K + , Na + and NH 4 + located within its cage to neutralize the negatively charged backbone. Zeolite is widely used in pharmaceutical carrier, catalysis, sewage treatment and other fields due to its strong ion exchange, adsorption, acid and heat resistance. In recent years, LTA, FAU, MFI and other types of zeolites have also been used as carriers of rare earth organic complexes to prepare luminescent materials with high color purity and long fluorescence lifetime. LED, etc. [0003] Upconversion luminescence is an anti-Stokes process that absorbs two or ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/02C09K11/85B82Y20/00B82Y30/00B82Y40/00
CPCC09K11/025C09K11/7773B82Y20/00B82Y30/00B82Y40/00Y02W10/37
Inventor 叶松廖华珍王德平
Owner TONGJI UNIV
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