Erbium-doped calcium titanate luminescent nanoparticles and preparation method thereof

A technology of nano-particles and calcium titanate, which is applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of high energy consumption, uneven shape, complicated process and other problems of calcium titanate particles, and achieve easy industrial production and good shape Good, low synthesis temperature effect

Active Publication Date: 2017-01-04
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] So far, calcium titanate particles are mostly prepared by hydrothermal method and sol-gel method, but the size is large, mostly micron or submicron, and the shape is uneven, which greatly limits its application in biomedicine. application
The preparation process of calcium titanate particles consumes a lot of energy and the process is complicated

Method used

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  • Erbium-doped calcium titanate luminescent nanoparticles and preparation method thereof
  • Erbium-doped calcium titanate luminescent nanoparticles and preparation method thereof
  • Erbium-doped calcium titanate luminescent nanoparticles and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Dissolve 0.495mmol of calcium nitrate tetrahydrate and 0.005mmol of erbium nitrate pentahydrate in 10ml of absolute ethanol, and mix them thoroughly under magnetic stirring for 30min to obtain solution A.

[0022] (2) Add 5mmol tetrabutyl titanate to 10ml ethanol solution containing 1.0g citric acid, stir for 30min and mix evenly, then add the resulting solution dropwise into solution A with a disposable straw, and stir for 60min.

[0023] (3) Add 4 mmol of auxiliary agent glycerol into the solution obtained in (2), and continue stirring for 1 hour to obtain a precursor solution.

[0024] (4) Put the precursor solution in an oven and dry at 80°C for 12 hours. The obtained powder is sintered at 700° C. for 2 hours in the air, and fully ground after cooling to obtain erbium-doped calcium titanate luminescent nanoparticles.

[0025] The general chemical formula of the erbium-doped calcium titanate luminescent nanoparticles prepared in this example is Ca 0.99 TiO 3 :...

Embodiment 2

[0027] (1) Dissolve 0.485mmol of calcium nitrate tetrahydrate and 0.015mmol of erbium nitrate pentahydrate in 20ml of absolute ethanol, and mix them thoroughly under magnetic stirring for 30min to obtain solution A.

[0028] (2) Add 5mmol tetrabutyl titanate to 10ml ethanol solution containing 1.0g citric acid, stir for 30min and mix evenly, then add the resulting solution dropwise into solution A with a disposable straw, and stir for 60min.

[0029] (3) Add 4 mmol of auxiliary agent glycerol into the solution obtained in (2), and continue stirring for 1 hour to obtain a precursor solution.

[0030] (4) Put the precursor solution in an oven and dry at 80°C for 12 hours. The obtained powder is sintered at 700° C. for 2 hours in the air, and fully ground after cooling to obtain erbium-doped calcium titanate luminescent nanoparticles.

[0031] The general chemical formula of the erbium-doped calcium titanate luminescent nanoparticles prepared in this example is Ca 0.97 TiO 3 :...

Embodiment 3

[0033] (1) Dissolve 0.475mmol of calcium nitrate tetrahydrate and 0.025mmol of erbium nitrate pentahydrate in 10ml of absolute ethanol, and mix them thoroughly under magnetic stirring for 30min to obtain solution A.

[0034] (2) Add 5mmol tetrabutyl titanate to 10ml ethanol solution containing 1.0g citric acid, stir for 30min and mix evenly, then add the resulting solution dropwise into solution A with a disposable straw, and stir for 60min.

[0035] (3) Add 4 mmol of auxiliary agent glycerol into the solution obtained in (2), and continue stirring for 1 hour to obtain a precursor solution.

[0036] (4) Put the precursor solution in an oven and dry at 80°C for 12 hours. The obtained powder is sintered at 700° C. for 2 hours in the air, and fully ground after cooling to obtain erbium-doped calcium titanate luminescent nanoparticles.

[0037] The general chemical formula of the erbium-doped calcium titanate luminescent nanoparticles prepared in this example is Ca 0.95 TiO 3 :...

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Abstract

The invention relates to a calcium titanate nanoparticle prepared by adopting a sol-gel method and having up-conversion light-emitting effect. The strong up-conversion light-emitting function can be realized by doping rare earth element erbium, and the light-emitting intensity and light-emitting color can be adjusted according to different doping amount. The nanoparticle with small size and good appearance can be obtained by adding a certain amount of glycerol as an additive into an ethanol solvent. The sol-gel preparation method is simple, the controllability is strong, and the prepared nanoparticle is high in purity and high in yield, and has important application prospects in the field of preparation of light-emitting devices, biotissue imaging and medicine tracing.

Description

technical field [0001] The invention belongs to the technical field of applied inorganic advanced nanomaterials, and in particular relates to an erbium-doped calcium titanate luminescent nanoparticle with an up-conversion luminescent effect and a preparation method thereof, which can be applied to the preparation of light-emitting devices and imaging of biological tissues and drug tracing. Background technique [0002] Rare-earth element up-conversion luminescent materials are an important class of luminescent materials, which have abundant energy levels and can be excited by long-wavelength light sources to excite shorter-wavelength light. The excited visible light can be controlled by factors such as the doping amount of rare earth elements. Due to its excellent optical properties, it has received extensive attention and research. [0003] The phonon energy of calcium titanate is low (470cm -1 ), good chemical stability, and its unique perovskite structure allows doping...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/67
Inventor 李翔李彬彬杜泉龙韩高荣
Owner ZHEJIANG UNIV
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