Alkali metal enhanced bismuth titanate-based up-conversion fluorescent material and preparation method thereof

A fluorescent material, bismuth titanate technology, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of affecting luminous efficiency, deterioration, easy to absorb moisture, etc., and achieve the effect of good chemical stability, not easy to absorb water, and enhanced performance

Pending Publication Date: 2021-05-04
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the low phonon energy of fluoride, fluoride up-conversion materials are research hotspots. However, its disadvantage is that it is easy to absorb moisture and deteriorate, which affects its luminous efficiency, so it is not easy to be directly exposed to the air for a long time.

Method used

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  • Alkali metal enhanced bismuth titanate-based up-conversion fluorescent material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] By Bi 3.46 Ho 0.04 Yb 0.5 Ti 3 o 12 :0.02Li as an example, the method is a chemical solution method, mainly including: S1, the preparation of the precursor solution; S2, gel preparation, S3 three steps of sintering, the specific steps are as follows:

[0040] S1. Preparation of precursor solution:

[0041] According to the chemical formula Bi of the upconverting phosphor 3.46 Ho 0.04 Yb 0.5 Ti 3 o 12 : 0.02Li, take by weighing 3.5086g bismuth nitrate pentahydrate (Bi(NO 3 ) 3 ·5H 2 O), 0.0318g holmium nitrate pentahydrate (Ho(NO 3 ) 3 ·5H 2 O), 0.4205g ytterbium nitrate hexahydrate (Yb(NO 3 ) 3 ·6H 2 O), 0.0028g lithium nitrate (LiNO 3 ) into a beaker as the precursors of Bi, Ho, Yb, and Li respectively, add 15ml of glacial acetic acid solution to the beaker, heat and stir it on a constant temperature magnetic stirrer, the heating temperature is 60°C, the holding time is 20min, cool to room temperature to form A liquid;

[0042] Tetrabutyl titanate (...

Embodiment 2

[0051] By Bi 3.46 Ho 0.04 Yb 0.5 Ti 3 o 12 :0.05Li as an example, the specific steps are as follows:

[0052] S1. Preparation of precursor solution: according to the chemical formula Bi of the up-conversion phosphor 3.46 Ho 0.04 Yb 0.5 Ti 3 o 12 : 0.05Li, weigh 3.5086g bismuth nitrate pentahydrate (Bi(NO 3 ) 3 ·5H 2 O), 0.0318g holmium nitrate pentahydrate (Ho(NO 3 ) 3 ·5H 2 O), 0.4205g ytterbium nitrate hexahydrate (Yb(NO 3 ) 3 ·6H 2 O), 0.0069g lithium nitrate (LiNO 3 ) into a beaker as the precursors of Bi, Ho, Yb, and Li respectively, add 15ml of glacial acetic acid solution to it, place it on a constant temperature magnetic stirrer to heat and stir, the heating temperature is 60°C, the holding time is 15min, cool to room temperature to form A solution;

[0053] Tetrabutyl titanate (Ti(OC 4 h 9 ) 4 ) as a Ti precursor, 1.85ml tetrabutyl titanate was added to 15ml ethylene glycol methyl ether, and stirred at a speed of 800r / min for 2min at room tempera...

Embodiment 3

[0058] with Bi 3.46 Ho 0.04 Yb 0.5 Ti 3 O 12 :0.05Na as an example, the specific steps are as follows:

[0059] S1. Preparation of precursor solution: according to the chemical formula Bi of the up-conversion phosphor 3.46 Ho 0.04 Yb 0.5 Ti 3 O 12 : 0.05Na, weigh 3.5086g bismuth nitrate pentahydrate (Bi(NO 3 ) 3 ·5H 2 O), 0.0318g holmium nitrate pentahydrate (Ho(NO 3 ) 3 ·5H 2 O), 0.4205g ytterbium nitrate hexahydrate (Yb(NO 3 ) 3 ·6H 2 O), 0.0085g sodium nitrate (NaNO 3 ) into a beaker as the precursors of Bi, Ho, Yb, and Na respectively, add 15ml of glacial acetic acid solution to it, place it on a constant temperature magnetic stirrer, heat and stir, the heating temperature is 60°C, the holding time is 15min, cool to room temperature to form A solution;

[0060] Tetrabutyl titanate (Ti(OC 4 h 9 ) 4 ) as a Ti precursor, 1.85ml tetrabutyl titanate was added to 15ml ethylene glycol methyl ether, and stirred at a speed of 800r / min for 2min at room temperat...

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Abstract

The invention relates to an alkali metal enhanced bismuth titanate-based up-conversion fluorescent material and a preparation method thereof. The chemical formula of the material can be recorded as Bi4-xRExTi3O12:yM (x is more than 0 and less than or equal to 0.5, y is more than or equal to 0 and less than or equal to 2.5), wherein RE can be one or more up-conversion rare earth elements of Ho, Er, Tm, Sm and Yb, and M can be one or more alkali metal elements of K, Li and Na. The alkali metal ion doped bismuth titanate material is excited by 980nm infrared light by adopting a chemical solution method, and the emission intensity can be improved by more than two times compared with the emission intensity when the bismuth titanate material is not doped with the alkali metal ions. The phosphor is prepared by adopting a chemical solution method, the technological process is simple, and the operation is convenient. The synthesized phosphor has high luminous efficiency, and has good application prospects in the aspects of up-conversion red lasers, fluorescence labeling, anti-counterfeiting and the like.

Description

technical field [0001] The invention relates to the technical field of fluorescent material design and preparation, and relates to an alkali metal-enhanced bismuth titanate-based up-conversion fluorescent material and a preparation method thereof. Background technique [0002] Up-conversion phosphor is a kind of optical frequency conversion material, which can convert low-energy infrared light into high-energy visible light. prospect. At present, up-conversion phosphors can be divided into inorganic up-conversion phosphors, organic up-conversion phosphors, and inorganic-organic hybrid phosphors. Inorganic up-conversion phosphors have relatively stable chemical properties, are easy to prepare, and are not prone to photobleaching. According to the chemical composition characteristics of inorganic up-conversion phosphors, it can be divided into fluoride system, oxide system, sulfide system, and hybrid systems such as sulfur oxide and oxyfluoride. [0003] The lattice vibratio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/78C09K11/74
CPCC09K11/7769
Inventor 高锋任锋韦悦周
Owner GUANGXI UNIV
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