Rare earth-doped nanometer spherical TiO2 up-conversion compound and preparation method thereof

A rare earth doping, rare earth chloride technology, applied in chemical instruments and methods, measuring devices, fluorescence/phosphorescence, etc., can solve the problems of affecting luminous efficiency, high phonon energy, rare earth doped oxides not nano-sized, etc. Achieve the effect of improving resolution, small size, and long luminous time

Inactive Publication Date: 2016-07-13
DALIAN NATIONALITIES UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage of oxide materials is that their phonon energy is higher than that of sulfide and fluoride, which affects the upconversion luminous efficiency of this material.
At present, most of the inventions of rare earth doped oxides are not nano-sized

Method used

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  • Rare earth-doped nanometer spherical TiO2 up-conversion compound and preparation method thereof
  • Rare earth-doped nanometer spherical TiO2 up-conversion compound and preparation method thereof
  • Rare earth-doped nanometer spherical TiO2 up-conversion compound and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Take 3.6 mL of tetrabutyl titanate with a concentration of 0.966 g / mL and 1.08 mL of ethanolamine with a concentration of 1.02 g / mL and mix them evenly to obtain solution 1;

[0037] (2) 0.18mL deionized water, 7.2mL absolute ethanol, 15.3mL ErC1 with a concentration of 0.01mol / L 3 ·6H 2 O, concentration is 10.2mL ytterbium nitrate of 0.1mol / L, concentration is 4.08mLLiCl of 0.5mol / L, mixes and makes solution 2;

[0038] (3) Under continuous stirring, drop solution 2 into solution 1 drop by drop, and keep stirring to obtain uniform and transparent doped TiO 2 Sol;

[0039] (4) Put this solution into the polytetrafluoroethylene lining of a 50mL autoclave, heat it at 120°C for 6 hours and then cool it down to room temperature naturally. Dry in a constant temperature drying oven;

[0040] (5) Put the obtained luminescent powder into a crucible for annealing at 800° C. for 4 hours, and grind after cooling.

[0041] Rare earth-doped nano-spherical TiO made by the me...

Embodiment 2

[0043] (1) Weigh 5 mL of tetrabutyl titanate with a concentration of 0.966 g / mL and 6.8 mL of diethanolamine with a concentration of 1.097 g / mL, and mix them to obtain a mixed solution 1;

[0044] (2) 1.3mL deionized water, 10mL absolute ethanol, Ho(NO 3 ) 3 ·5H 2 O14.2mL, the concentration is 0.1mol / L of Yb(NO 3 ) 3 ·5H 2 O14.2mL, KCl2.84mL with a concentration of 0.5mol / L, mixed evenly to make solution 2;

[0045] (3) Under continuous stirring, drop solution 2 into solution 1 drop by drop, and keep stirring to obtain uniform and transparent doped TiO 2 Sol;

[0046] (4) Put this solution into the polytetrafluoroethylene lining of the autoclave, heat it at 90°C for 3 hours and then cool it down to room temperature naturally. drying in a drying oven;

[0047] (5) Put the obtained luminescent powder into a crucible for annealing at 900° C. for 2 hours, and grind after cooling.

[0048] Rare earth doped nano spherical TiO made by the method of embodiment 2 2 The chemical...

Embodiment 3

[0050] (1) Weigh 5 mL of tetrabutyl titanate with a concentration of 0.966 g / mL and 1.36 mL of diethanolamine with a concentration of 1.097 g / mL, and mix them to obtain a mixed solution 1;

[0051] (2) 0.5mL deionized water, 10mL absolute ethanol, Eu(NO 3 ) 3 ·5H 2 O17mL, the concentration is 0.1mol / L of Yb(NO 3 ) 3 5H 2 O14.2mL, concentration is 0.5mol / L NaCl1.42mL, mix uniformly and make solution 2;

[0052] (3) Under continuous stirring, drop solution 2 into solution 1 drop by drop, and keep stirring to obtain uniform and transparent doped TiO 2 Sol;

[0053] (4) Put this solution into the polytetrafluoroethylene lining of a 50mL autoclave, heat it at 120°C for 3 hours and then cool it down to room temperature naturally. Dry in a constant temperature drying oven;

[0054] (5) Put the obtained luminescent powder into a crucible for annealing at 600° C. for 4 hours, and grind after cooling.

[0055] Rare earth doped nano spherical TiO made by the method of embodiment...

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Abstract

The invention relates to a rare earth-doped nanometer spherical TiO2 up-conversion compound and a preparation method thereof and belongs to the field of nanometer up-conversion luminescence compounds.The rare earth-doped nanometer spherical TiO2 up-conversion compound refers to TiO2:X%M, Y%Yb, Z%N, wherein M refers to one or more of Y, Sc, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu, N refers to one or more of light metals, and molar ratios of X, Y and Z satisfy the conditions that X is not less than 1 and not more than 1.8, Y is equal to 10, and Z is not less than 0 and is not more than 20.The rare earth-doped nanometer spherical TiO2 up-conversion compound has the advantages that the rare earth-doped nanometer spherical TiO2 up-conversion compound, a nanometer spherical up-conversion luminescence material, is small in size and can be applied to the field of bioimaging; the nanometer spherical up-conversion luminescence material is beneficial to screen coating, so that resolution ratio of a display screen is increased greatly; the nanometer spherical up-conversion luminescence material is of little biotoxicity, stability and long luminescent time like other nanometer luminescence materials.

Description

technical field [0001] The invention relates to a nanoscale up-conversion luminescent compound and a preparation method, in particular to a rare earth-doped nanosphere TiO 2 Upconverting compounds and methods for their preparation. Background technique [0002] Up-conversion luminescence, that is, Anti-Stokes luminescence (Anti-Stokes), comes from Stokes' law. Stokes' law holds that materials can only be excited by high-energy light and emit low-energy light. In other words, those with short wavelengths and high frequencies excite light with long wavelengths and low frequencies. For example, ultraviolet light excites visible light, or blue light excites yellow light, or visible light excites infrared light. But later it was discovered that some materials can actually achieve a luminous effect that is just opposite to the above-mentioned law, so we call it anti-Stokes luminescence, also known as up-conversion luminescence. Therefore, up-conversion luminescence is a process...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/67C09K11/02G01N21/64
CPCC09K11/7766C09K11/02C09K11/7783G01N21/6458G01N21/6486
Inventor 新梅梁译文
Owner DALIAN NATIONALITIES UNIVERSITY
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