Rare earth doped upconversion @ silicon dioxide nano-composite bar and preparation method thereof

A rare earth doping and nano-composite technology, which is applied in chemical instruments and methods, nanotechnology, nano-optics, etc., can solve the problems such as the slow development of one-dimensional nanocomposite material preparation technology, and achieve precise control of aspect ratio and luminescence performance, The effect of simple preparation method

Active Publication Date: 2018-03-13
NORTHEAST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the preparation of rare earth-doped upconversion@silica nanocomposite rods with controllable morphology, performance, size and chemical composition has very important theoretical and practical value, so far, the development of preparation technology for one-dimensional nanocomposites is still slow , the related preparation methods of rare earth doped up-conversion @ silica nanocomposite rods are still blank

Method used

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  • Rare earth doped upconversion @ silicon dioxide nano-composite bar and preparation method thereof
  • Rare earth doped upconversion @ silicon dioxide nano-composite bar and preparation method thereof
  • Rare earth doped upconversion @ silicon dioxide nano-composite bar and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Example 1 Preparation of Rare Earth Doped Upconversion@Silicon Dioxide Nanocomposite Rods

[0022] Add 5 mL of 0.2 g / mL polyvinylpyrrolidone in amyl alcohol, 50 µL of 0.18 M sodium citrate in water, 150 µL of ammonia, 150 µL of water, 500 µL of 0.1 g / mL octadecyltrimethyl bromide Ammonium ethanol solution, 50 µL tetraethyl orthosilicate, and rare earth-doped up-conversion nanoparticles with a mass concentration of 0.5% were mixed evenly, stirred at 40°C, and the reaction time was 1 hour. After centrifugal washing, rare earth-doped upconversion@silica nanocomposite rods with an aspect ratio of about 3.6:1 were obtained.

Embodiment 2

[0023] Example 2 Preparation of Rare Earth Doped Upconversion@Silicon Dioxide Nanocomposite Rods

[0024] Add 5 mL of 0.2 g / mL polyvinylpyrrolidone in amyl alcohol, 50 µL of 0.18 M sodium citrate in water, 150 µL of ammonia, 150 µL of water, 500 µL of 0.1 g / mL octadecyltrimethyl bromide Ammonium ethanol solution, 50 µL tetraethyl orthosilicate, and rare earth-doped up-conversion nanoparticles with a mass concentration of 1% were mixed evenly, stirred at 40°C, and the reaction time was 1 hour. After centrifugal washing, rare earth-doped upconversion@silica nanocomposite rods with an aspect ratio of about 3.3:1 were obtained.

Embodiment 3

[0025] Example 3 Preparation of Rare Earth Doped Upconversion@Silicon Dioxide Nanocomposite Rods

[0026] Add 5 mL of 0.2 g / mL polyvinylpyrrolidone in amyl alcohol, 50 µL of 0.18 M sodium citrate in water, 150 µL of ammonia, 150 µL of water, 500 µL of 0.1 g / mL octadecyltrimethyl bromide Ammonium ethanol solution, 50 µL tetraethyl orthosilicate, and rare earth-doped up-conversion nanoparticles with a mass concentration of 2% were mixed evenly, stirred at 40°C, and the reaction time was 1 hour. After centrifugal washing, rare earth-doped upconversion@silica nanocomposite rods with an aspect ratio of about 2.7:1 were obtained.

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Abstract

The invention discloses a rare earth doped upconversion @ silicon dioxide nano-composite bar. A preparation method of the nano-composite bar includes the steps: 1) uniformly mixing amyl alcohol solution of polyvinylpyrrolidone, sodium citrate water solution, ammonium hydroxide, water, ethanol solution of alkyl ammonium bromide and tetraethoxysilane according to the volume ratio of 500:5:10:10:20:(5-500): 5:15:1550:5; adding 0.5%-6% of rare earth doped upconversion nano-particles; stirring mixture for 10 minutes-17 hours at the temperature of 4-135 DEG C; performing centrifugal washing to obtain the are earth doped upconversion @ silicon dioxide nano-composite bar. The preparation method is simple and efficient, industrial mass production requirements can be met, and the preparation methodadjusts reaction parameters such as the content of the tetraethoxysilane, the ammonium hydroxide, the water, absolute ethyl alcohol, the sodium citrate water solution and the alcohol solution of the polyvinylpyrrolidone, reaction temperature, reaction time and the weight of added rare earth doped upconversion nano-particles in the reaction process, so that the long-diameter ratio and luminescent properties of the earth doped upconversion @ silicon dioxide nano-composite bar are accurately adjusted.

Description

technical field [0001] The invention belongs to the field of nanocomposite materials, in particular to a rare earth-doped upconversion@silicon dioxide nanocomposite rod and a preparation method thereof. Background technique [0002] Rare earth-doped upconversion luminescent nanomaterials have unique anti-Stokes luminescence properties, which can absorb low-photon energy light through a multi-photon mechanism and emit high-photon energy visible light under near-infrared light excitation. Because of its low excitation light energy, it has good penetrating ability to biological tissue, reduces damage to biological tissue, and avoids the interference of biological autofluorescence and scattered light. In addition, rare earth-doped upconversion luminescent nanomaterials also have narrow emission spectrum, long fluorescence lifetime, high fluorescence intensity, good photochemical stability and photobleaching resistance, these properties make rare earth doped upconversion luminesc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/85C09K11/02B82Y20/00B82Y30/00B82Y40/00
CPCB82Y20/00B82Y30/00B82Y40/00C09K11/025C09K11/7773
Inventor 洪霞倪然王可心刘益春
Owner NORTHEAST NORMAL UNIVERSITY
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