Cr<3+> and Bi<3+> double-doped gallate long-afterglow fluorescent powder material as well as preparation method and application thereof

A long-lasting phosphor and gallate technology, which is applied in the field of biomedical imaging, achieves deep penetration, uniform appearance, and is conducive to large-scale industrial promotion and application

Pending Publication Date: 2020-06-09
WUHAN INSTITUTE OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the invention is to solve existing ZnGa 2 o 4 :Cr 3+ The above-mentioned problems existing in the inorganic phosphor material, realize the ZnGa through two-phase hydrothermal method 2 o 4 Cr 3+ 、 Bi 3+ Double doping, the resulti

Method used

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  • Cr&lt;3+&gt; and Bi&lt;3+&gt; double-doped gallate long-afterglow fluorescent powder material as well as preparation method and application thereof
  • Cr&lt;3+&gt; and Bi&lt;3+&gt; double-doped gallate long-afterglow fluorescent powder material as well as preparation method and application thereof
  • Cr&lt;3+&gt; and Bi&lt;3+&gt; double-doped gallate long-afterglow fluorescent powder material as well as preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1) According to the target product chemical formula Zn 0.97 Ga 1.97 o 3.97 :0.01Cr3+ ,0.02Bi 3+ stoichiometric ratio, accurately weigh the following raw materials: 1mmol Zn(NO 3 ) 2 ·6H 2 O, 2.031mmol Ga(NO 3 ) 3 ·xH 2 O, 0.01mmol Cr(NO 3 ) 3 9H 2 O and 0.02mmol Bi(NO 3 ) 3 ·5H 2 O.

[0027] 2) The above raw materials were dissolved in 15 mL of deionized water and stirred for 30 min, and then tert-butylamine was added to adjust the pH of the solution to 9. Mix 2 mL of oleic acid with 20 mL of toluene to obtain an organic mixed solution, which is then mixed with the prepared alkaline reaction solution. The mixture thus obtained was transferred to a 50 mL stainless steel autoclave and heated to 150° C. for 20 h. After the system is cooled to room temperature, excess ethanol is added to precipitate the nanoparticles from the synthesis solution, and the solid product obtained by centrifugation is washed and dried, which is the target phosphor sample Zn 0.97...

Embodiment 2

[0036] Embodiment 2 is substantially the same as Embodiment 1, the difference is: Bi 3+ The doping amount is 1%, that is, the raw material is adjusted to 1mmol Zn(NO 3 ) 2 ·6H 2 O, 2.041mmol Ga(NO 3 ) 3 ·xH 2 O, 0.01mmol Cr(NO 3 ) 3 9H 2 O and 0.01mmolBi(NO 3 ) 3 ·5H 2 O. The target phosphor sample thus prepared is Zn 0.97 Ga 1.98 o 3.97 :0.01Cr 3+ ,0.01Bi 3+ .

Embodiment 3

[0038] Embodiment 3 is substantially the same as Embodiment 1, the difference is: Bi 3+ The doping amount is 3%, that is, the raw material is adjusted to 1mmol Zn(NO 3 ) 2 ·6H 2 O, 2.021mmol Ga(NO 3 ) 3 ·xH 2 O, 0.01mmol Cr(NO 3 ) 3 9H 2 O and 0.03mmolBi(NO 3 ) 3 ·5H 2 O. The target phosphor sample thus prepared is Zn 0.97 Ga 1.96 o 3.97 :0.01Cr 3+ ,0.03Bi 3+ .

[0039] For fully understanding the performance of the fluorescent powder product that the present invention makes, carried out corresponding test respectively, specifically as follows:

[0040] 1. Diffuse reflectance spectrum test

[0041] Place the sample to be tested in the ultraviolet light (Ultraviolet Rays, UV) of 300W xenon lamp to excite for 5 minutes, with BaSO 4 As a reference standard, diffuse reflectance spectra were measured using a Cary 5000 UV-Vis-NIR spectrophotometer equipped with a double off-surface Littrow monochromator. Wherein the ZGO:0.01Cr prepared by embodiment 1 3+ ,0.02Bi...

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Abstract

The invention relates to a Cr<3+> and Bi<3+> double-doped gallate long-afterglow fluorescent powder material and a preparation method thereof. The method comprises the following steps: dissolving nitrates of zinc, gallium, chromium and bismuth in water according to a stoichiometric ratio, adding tert-butylamine to adjust the pH value of the solution to be alkaline, adding oleic acid and toluene tocarry out a hydrothermal reaction, and carrying out solid-liquid separation. The chemical formula of the fluorescent powder material prepared by the method is Zn0.97Ga(2-x-y) O3.97: xCr<3+>, yBi<3+>,x is greater than or equal to 0.01 and less than or equal to 0.02, y is greater than or equal to 0.01 and less than or equal to 0.03, the average particle size of the fluorescent powder material is about 8nm, and the fluorescent powder material is spherical-like particles. The absorption band strength of the double-doped fluorescent powder material at the positions of 350 nm, 350-470 nm and 470-650 nm in a diffuse reflection spectrum is obviously enhanced, the double-doped fluorescent powder material can be effectively excited by red light with higher biological tissue penetrating capacity, in-vivo charging can be carried out, imaging can be carried out at any time, and the double-doped fluorescent powder material can be used as a probe to be applied to the field of biomedical imaging.

Description

technical field [0001] The invention relates to the technical field of luminescent materials, in particular to a Cr 3+ 、 Bi 3+ Double-doped gallate long-lasting phosphor material and its preparation method and application in biomedical imaging. Background technique [0002] Inorganic phosphor materials usually have the advantages of high brightness, low energy consumption, high stability, and long afterglow life, and are widely used in many fields such as white LED devices, display lighting, solar cells, temperature measurement, and bio-optical imaging. In the field of bio-optical imaging, traditional inorganic phosphor materials show the disadvantages of fast afterglow decay and difficulty in repeated excitation in biological tissues. Ultraviolet light and blue light, which are often used as excitation light sources, also have high attenuation and weak Insufficient penetration and imaging depth, etc. In addition, the fluorescence spontaneously produced by the tissue in th...

Claims

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Application Information

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IPC IPC(8): C09K11/62A61K49/00
CPCC09K11/7414A61K49/0019
Inventor 戴武斌樊烨明沈凡黄珂陈洋黎华徐慢
Owner WUHAN INSTITUTE OF TECHNOLOGY
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