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Quantum-dot-doped aluminium phosphate mesoporous glass nanometer compound and preparation method thereof

A nanocomposite and mesoporous glass technology, which is applied in the field of aluminum phosphate mesoporous glass nanocomposite and its preparation, can solve the problems of high surface energy, easy agglomeration and hindrance of quantum dots, and achieves simple methods, simple preparation conditions, Easy to operate and effective effect

Active Publication Date: 2014-07-23
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] First, it is easy to reunite
Nano-sized quantum dots have a large specific surface area and high surface energy, and freely dispersed quantum dots are easy to agglomerate and seriously affect their luminescent properties
[0004] Second, it is inconvenient to use
At present, quantum dots are mostly dispersed in organic solvents, and there are difficulties in stable extraction and solidification in practical use, making their application in optical devices face many obstacles

Method used

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  • Quantum-dot-doped aluminium phosphate mesoporous glass nanometer compound and preparation method thereof
  • Quantum-dot-doped aluminium phosphate mesoporous glass nanometer compound and preparation method thereof
  • Quantum-dot-doped aluminium phosphate mesoporous glass nanometer compound and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Mix and stir lead acetate aqueous solution, thiopropanol, and dithiol evenly, and then bathe in ice for 15 minutes, then add Na 2 S aqueous solution, stirred and reacted for at least 5 minutes to obtain a fresh quantum dot solution;

[0033] (2) AlPO 4 Immerse the mesoporous glass in fresh quantum dot solution for 15 minutes, then take out the glass, rinse it with absolute ethanol for 3 to 5 times, and dry it in an oven at 50°C for 30 minutes to obtain PbS quantum dot-AlPO doped with a single quantum dot. 4 Mesoporous glass nanocomposites.

[0034] The complex produces near-infrared single-peak luminescence under 808nm laser excitation, the luminescence peak wavelength is 990nm, and the peak width is 120nm, such as figure 1 As shown in the curve a.

Embodiment 2

[0036] (1) Mix and stir lead acetate aqueous solution, thiopropanol, and dithiol evenly, and then bathe in ice for 15 minutes, then add Na 2 S aqueous solution, stirred and reacted for at least 5 minutes to obtain a fresh quantum dot solution;

[0037] (2) Take the quantum dot solution and seal it away from light and mature it at 50°C for 1 hour to obtain the mature quantum dot solution;

[0038] (3) AlPO 4The mesoporous glass was immersed in fresh quantum dot solution for 15 minutes, then the glass was taken out, rinsed with absolute ethanol for 3 to 5 times, then placed in a vacuum oven at 200°C, and heat-treated at a constant temperature for 6 hours to remove organic matter and water;

[0039] (4) After the heat treatment, the glass was cooled to room temperature with the box and taken out, immediately immersed in the aging quantum dot solution for 15 minutes, then the glass was taken out, rinsed with absolute ethanol for 5 times, and then dried in an oven at 50°C for 30 m...

Embodiment 3

[0042] (1) Repeat step (1) of Example 2;

[0043] (2) Take the quantum dot solution and seal it away from light and mature it at 50°C for 2 hours to obtain the mature quantum dot solution;

[0044] (3) AlPO 4 The mesoporous glass was immersed in fresh quantum dot solution for 15 minutes, then the glass was taken out, rinsed with absolute ethanol for 3 to 5 times, then placed in a vacuum oven at 200°C, and heat-treated at a constant temperature for 6 hours to remove organic matter and water;

[0045] (4) After the heat treatment, the glass was cooled to room temperature with the box and taken out, immediately immersed in the aging quantum dot solution for 15 minutes, then the glass was taken out, rinsed with absolute ethanol for 5 times, and then dried in an oven at 50°C for 30 minutes to obtain two kinds of Quantum dot-doped PbS quantum dots-AlPO with wide-tunable near-infrared band emission 4 Mesoporous glass nanocomposites.

[0046] The complex generates near-infrared lig...

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Abstract

The invention discloses a novel near-infrared quantum-dot-doped aluminium phosphate mesoporous glass nanometer compound and a preparation method thereof. The PbS-quantum-dot AlPO4 mesoporous glass nanometer compound is AlPO4 mesooprous glass doped with PbS quantum dots with different dimensions. The preparation method of the quantum-dot-doped aluminium phosphate mesoporous glass nanometer compound comprises the following steps: step 1, preparing a PbS quantum dot solution with two kinds of luminescence peak-value wavelength and a mixed solution with fresh quantum dots and ripened quantum dots; step 2, immersing AlPO4 mesoporous glass prepared by employing a sol-gel method in the quantum dot solution of the step 1 for one time or for independently two times; and step 3, taking the immersed mesoporous glass out from the solution, and performing moistening washing and drying to obtain the PbS-quantum-dot AlPO4 mesoporous glass nanometer compound. Tests prove that under pumping of near infrared, the PbS-quantum-dot AlPO4 mesoporous glass nanometer compound is capable of generating broadly tunable luminescence or double-peak luminescence at near infrared wave band, and has important application to the field of broadband optical transmission, multiband response optical communication materials and devices.

Description

technical field [0001] The invention relates to a luminescent mesoporous glass nanocomposite, in particular to a quantum dot-doped aluminum phosphate mesoporous glass nanocomposite and a preparation method thereof. Background technique [0002] Quantum dots are semiconductor nanocrystals composed of a limited number of atoms, and their particle size is small, generally only a few nanometers. Due to the quantum confinement effect, the continuous energy band of the quantum dot becomes a discrete energy level structure, which can realize stimulated emission and luminescence. Quantum dots have a wide absorption spectrum and a narrow and symmetrical emission spectrum. Based on the quantum size effect, the position of the luminescence peak can be adjusted by adjusting and controlling the size of the quantum dots to achieve multicolor luminescence of the same material. However, quantum dots often face several problems during use: [0003] First, it is easy to reunite. Nano-sized...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C23/00C03C4/12C03C11/00
Inventor 李日红王焱张龙何进
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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