Up-conversion nanocrystalline zeolite composite material as well as preparation method and application thereof

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., and achieves simple operation, reduced non-radiative transition, and high efficiency. Effect of upconverting luminescence properties

Active Publication Date: 2021-02-26
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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  • Up-conversion nanocrystalline zeolite composite material as well as preparation method and application thereof
  • Up-conversion nanocrystalline zeolite composite material as well as preparation method and application thereof
  • Up-conversion nanocrystalline zeolite composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

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

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

[0040] (4) Heat the solution obtained in (3) at 280° C. for 30 minutes under an argon atmosphere, and then cool to room temperature;

[0041] (5) Centrifuge the solution obtained in (4), disperse the solid obtained by centrifugation with 1...

Embodiment 2

[0047] (1) Take the 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 the mixed solution of 6mL oleic acid and 15mL 1-octadecene, heated and stirred at 160°C for 40 minutes under an argon atmosphere, after the rare earth was dissolved, stop heating and naturally cool to room temperature;

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

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

[0050] (4) Heat the solution obtained in (3) at 280° C. for 30 minutes under an argon atmosphere, and then cool to room temperature;

[0051] (5) Centrifuge the solution obtained in (4), disperse the solid obtained by centrifugation with...

Embodiment 3

[0056] (1) Take the 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 the mixed solution of 6mL oleic acid and 15mL 1-octadecene, heated and stirred at 160°C for 40 minutes under an argon atmosphere, after the rare earth was dissolved, stop heating and naturally cool to room temperature;

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

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

[0059] (4) Heat the solution obtained in (3) at 280° C. for 30 minutes under an argon atmosphere, and then cool to room temperature;

[0060] (5) Centrifuge the solution obtained in (4), disperse the solid obtained by centrifugation wit...

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Abstract

The invention relates to an up-conversion nanocrystalline zeolite composite material as well as a preparation method and application thereof, the composite material comprises zeolite and rare earth doped up-conversion nanocrystalline growing in a zeolite porous structure, the rare earth doped up-conversion nanocrystalline is NaRE<1>F<4>: xYb < 3 + >, yRE<2>< 3 + >, wherein RE<1> is Y or Gd, RE<2>is Tm, Er or Ho, 0<x<= 30mol%, and 0<y<= 3mol%; the preparation process comprises the following steps: preparing rare earth doped up-conversion nanocrystals and compounding the rare earth doped up-conversion nanocrystals with zeolite with different topological structures; the up-conversion nanocrystalline zeolite composite material emits visible light under the excitation of 980nm. Compared with the prior art, the up-conversion luminescence zeolite material with remarkably improved luminescence intensity under excitation of 980nm can be obtained, dynamic monitoring of the zeolite drug loadingand releasing process is facilitated, and the signal-to-noise ratio is improved.

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 its preparation method and application. 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 skeleton. Because of its strong ion exchange, adsorption, acid and heat resistance, zeolite is widely used in drug carrier, catalysis, sewage treatment and other fields. 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. These materials are expected to be used in bioluminescent labels, sensors, white light LEDs, etc. [000...

Claims

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Application Information

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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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