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Thermo-responsive upconversion luminescent material and preparation method thereof

A luminescent material, dodecacalcium technology, applied in luminescent materials, chemical instruments and methods, etc., to achieve the effect of improving up-conversion luminous efficiency

Active Publication Date: 2019-06-14
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no report on the use of coating technology to improve the rare earth ion-doped C12A7 material.

Method used

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  • Thermo-responsive upconversion luminescent material and preparation method thereof
  • Thermo-responsive upconversion luminescent material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Step 1: Preparation of core (C12A7:Yb3.0 / Tm0.2). Weigh 1.8782g of calcium hydroxide, 2.3068g of aluminum hydroxide, 0.0505g of thulium nitrate pentahydrate and 0.7645g of ytterbium nitrate pentahydrate, add 80ml of alcohol to carry out ball milling, then move the mixed solution after ball milling to the reaction kettle, at 150°C Keep warm for 6 hours, cool to room temperature, filter, dry at 90°C for 12 hours, and then calcine in a muffle furnace at 1200°C, cool to room temperature, and grind to obtain a powder sample C12A7:Yb3 .0 / Tm0.2.

[0027] Step 2: Weigh 0.0449g of calcium hydroxide, 0.0551g of aluminum hydroxide, 0g of ytterbium nitrate pentahydrate (0mol%), add 20ml of absolute ethanol ball mill, and then weigh 0.1g of C12A7:Yb3.0 prepared in step 1 / Tm0.2 into a 100ml beaker, add 60ml of absolute ethanol and ultrasonically disperse for 30min. ;

[0028] Step 3: transfer the mixed solution after ball milling and C12A7:Yb3.0 / Tm0.2 after ultrasonic dispersion t...

Embodiment 2

[0033] The difference between this embodiment and Example 1 is that the calcium hydroxide, aluminum hydroxide and ytterbium nitrate pentahydrate in step 2 can be 12:14 according to the molar ratio of calcium and aluminum atoms, and the doping concentration of ytterbium nitrate pentahydrate is 0 ~4mol% for free mix. Others are the same as in Example 1.

Embodiment 3

[0035] The difference between this embodiment and Example 1 is that the total mass of calcium hydroxide, aluminum hydroxide, and ytterbium nitrate pentahydrate in step 2 ranges from 0.1g to 0.18 under the condition that the molar ratio of calcium and aluminum atoms is 12:14 g changes. Others are the same as in Example 1.

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Abstract

The invention relates to the technical field of luminescent materials, in particular to a thermo-responsive upconversion luminescent material and a preparation method thereof. The preparation method of the thermo-responsive upconversion luminescent material comprises the following steps: 1, calcium hydroxide, aluminum hydroxide, thulium nitrate pentahydrate and ytterbium nitrate pentahydrate are added with aqueous ethanol to obtain a mixed solution, a first solvent thermal reaction is conducted to obtain a first reaction product, and then the first reaction product is calcined primarily to obtain a C12A7 material; and 2, calcium hydroxide, aluminum hydroxide and ytterbium nitrate pentahydrate are added with aqueous ethanol to be ball-milled, then the C12A7 material subjected to ultrasonicdispersion is added, a second solvent thermal reaction is conducted to obtain a second reaction product, and the second reaction product is calcined secondarily to obtain the thermo-responsive upconversion material. The technical defect that the prior art lacks in a cladding technology to improve the rare earth ion doped C12A7 material can be effectively overcome.

Description

technical field [0001] The invention relates to the technical field of luminescent materials, in particular to a dodecacalcium heptaaluminate up-conversion luminescent material and a preparation method thereof. Background technique [0002] An up-conversion luminescent material is a material that can convert near-infrared light into visible light. Compared with traditional luminescent materials, such as organic dyes and quantum dots, up-conversion luminescent materials have the advantages of narrow emission peaks, large Stokes shifts, good chemical stability, and low cytotoxicity. Therefore, this material can be well applied in the field of biomedicine, and is expected to become a new generation of luminescent bioprobes. [0003] In order to obtain an up-conversion luminescent material with excellent performance, the selection of a suitable host material is particularly important, and dodecacalcium heptaaluminate 12CaO·7Al 2 o 3 (C12A7) becomes the first choice for the ma...

Claims

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Application Information

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IPC IPC(8): C09K11/02C09K11/64
Inventor 钱艳楠徐明光唐佳乐唐巽泽刘丽英张海燕
Owner GUANGDONG UNIV OF TECH
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