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Novel rare-earth-free porous fluorescent material and preparation method thereof

A fluorescent material and rare earth-free technology, applied in the field of fluorescent materials, can solve the problems of complex preparation process, narrow excitation spectrum, non-adjustment and the like, and achieve the effects of simple preparation process, wide excitation spectrum and low energy consumption

Active Publication Date: 2019-03-01
天长市润源催化剂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many problems in these luminescent porous materials using dyes or rare earth metal ions as luminescent centers.
First, the luminescence performance of this material is very small or almost non-adjustable, and its excitation spectrum is narrow, so it can only be excited by ultraviolet or near-ultraviolet light; second, the cost of this material is very high due to the use of rare earth metal ions ; and dyes and rare earth metal ions are also toxic, not suitable for biological and medical aspects
In addition, due to the complex preparation process, it is not suitable for industrial mass production

Method used

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  • Novel rare-earth-free porous fluorescent material and preparation method thereof
  • Novel rare-earth-free porous fluorescent material and preparation method thereof
  • Novel rare-earth-free porous fluorescent material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Weigh 1.2g of silicic acid, 1.0g of aluminum isopropoxide, 13.30g of TMAOH (25wt%) solution and 164μL of NaOH (10M) according to the molar ratio of each component in the chemical formula, and dissolve them in 6.9g of deionized water to completely dissolve the raw materials into the solution clarify. Put the mixed solution in a 50mL airtight container, put it in an oven at 70°C, and react for 2 days, wash the obtained precipitate with deionized water several times until the pHfigure 1 As shown, S1 is the XRD pattern of the fluorescent material obtained in Example 1, and LTA in the figure is the standard diffraction pattern of the LTA zeolite crystal. Such as figure 2 As shown, the fluorescent material obtained in Example 1 can be excited by ultraviolet light and emit blue light with a peak wavelength of 435 nm.

Embodiment 2

[0031] Weigh 1.2g of silicic acid, 1.0g of aluminum isopropoxide, 13.30g of TMAOH (25wt%) solution and 164μL of NaOH (10M) according to the molar ratio of each component in the chemical formula, and dissolve them in 6.9g of deionized water to completely dissolve the raw materials into the solution clarify. Put the mixed solution in a 50mL airtight container, put it in an oven at 70°C, and react for 2 days, wash the obtained precipitate with deionized water several times until the pH image 3 As shown, the obtained fluorescent material can be effectively excited by a wide band of ultraviolet to blue light, and emit red light with a peak wavelength of 640nm. Experiments have proved that by adjusting the temperature and time of sintering, the emission wavelength can fluctuate in the range of 530nm-640nm, and the scheme suitable for different products can be easily obtained through parameter setting.

Embodiment 3

[0033] Take by weighing 1.2g silicic acid, 1.0g aluminum isopropoxide, 13.30gTMAOH (25wt%) solution, 1.02gAPS and 164μL NaOH (10M) according to the molar ratio of each component in the chemical formula, be dissolved in 6.9g deionized water, make raw material completely Dissolve until the solution is clear. Put the mixed solution in a 50mL airtight container, put it in an oven at 70°C, and react for 3 days, wash the obtained precipitate with deionized water several times until the pH Figure 4 As shown, the obtained fluorescent material samples are monodisperse uniform spherical nanoparticles. Such as Figure 5 As shown, the obtained fluorescent material is a microporous material, and its specific surface area is calculated to be 515m 2 / g.

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Abstract

The invention discloses a novel rare-earth-free porous fluorescent material which is of a LTA zeolite crystal structure. The chemical composition formula of the material according to a molar ratio is0.6Na2O:13.4SiO2:1.8Al2O3:13.4(TMA)2O:700H2O:xAPS, wherein x is greater than or equal to 0 and smaller than or equal to 24, TMA is tetramethyl ammonium, and APS is 3-aminopropyl triethoxysilane. The invention further discloses a preparation method of the material. The material does not contain dye or rare earth ions, adjustable in emission spectra, capable of realizing full-spectrum emission fromblue light to red light, wide in excitation spectrum and capable of being effectively excited by ultraviolet, near ultraviolet and blue light. The preparation method is simple and convenient in preparation process, low in energy consumption and cost and suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to the field of fluorescent materials, in particular to a novel rare earth-free porous fluorescent material and a preparation method thereof. Background technique [0002] In the existing reports, luminescent porous materials are mainly obtained by introducing metal ions such as dyes or rare earth ions into the porous material matrix as luminescent centers. However, these luminescent porous materials using dyes or rare earth metal ions as luminescent centers have many problems. First, the luminescence performance of this material is very small or almost non-adjustable, and its excitation spectrum is narrow, so it can only be excited by ultraviolet or near-ultraviolet light; second, the cost of this material is very high due to the use of rare earth metal ions ; And dyes and rare earth metal ions are also toxic, not suitable for biological and medical aspects. In addition, due to the complicated preparation process, it is not sui...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/64
CPCC09K11/646
Inventor 赵争妍范炜王治龙田炜
Owner 天长市润源催化剂有限公司
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