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Zinc-germanium oxide long-afterglow luminescent material and preparation method thereof

A technology of long afterglow luminescence and long afterglow materials, which is applied in the direction of luminescent materials, chemical instruments and methods, and can solve the problems of low afterglow intensity and short afterglow time

Pending Publication Date: 2021-04-20
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the long afterglow materials synthesized by hydrothermal at present have low afterglow intensity and relatively short afterglow time. Therefore, long afterglow luminescent materials with better synthesis performance, smaller particle size and uniform particle size have important scientific significance and practical application prospects.

Method used

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  • Zinc-germanium oxide long-afterglow luminescent material and preparation method thereof
  • Zinc-germanium oxide long-afterglow luminescent material and preparation method thereof
  • Zinc-germanium oxide long-afterglow luminescent material and preparation method thereof

Examples

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Effect test

example 1

[0018] Example 1: The chemical composition formula of this embodiment is Zn 2 GeO 4 : 0.005Eu 3+ The preparation method of the long afterglow material is as follows:

[0019] Take GeO 2 0.52364g was dissolved in 10mL 3mol / L NaOH solution to prepare Na 2 GeO 3 solution; called Zn(NO 3 ) 2 ·3H 2 O 5.2996g, Eu(NO 3 ) 3 ·6H 2 O 0.0043g was prepared into 100mL solution respectively, 10mL was taken respectively in the same 100mL beaker, 3μL of concentrated nitric acid was added and stirred for 5min, then Na 2 GeO 3 Solution 2mL. Take concentrated ammonia water to adjust the pH to 6.5, continue to stir for 1 hour, put it into a 50mL polytetrafluoroethylene-lined autoclave, put it into an electric blast drying oven, heat it to 220°C for 4 hours, then cool it down to room temperature naturally, and take out the reaction product , after three to four times of high-speed centrifugal washing, put it into an electric blast drying oven to keep warm at 120°C and dry for 12 hours...

example 2

[0021] Example 2: The chemical composition formula of this embodiment is Zn 2 GeO 4 : 0.005Eu 3+ The preparation method of the long afterglow material is as follows:

[0022] Take GeO 2 0.52364g was dissolved in 10mL 3mol / L NaOH solution to prepare Na 2 GeO 3 solution; called Zn(NO 3 ) 2 ·3H 2 O 5.2996g, Eu(NO 3 ) 3 ·6H 2 O 0.0043g was prepared into 100mL solution respectively, 10mL was taken respectively in the same 100mL beaker, 3μL of concentrated nitric acid was added and stirred for 5min, then Na 2 GeO 3 2 mL of solution. Take concentrated ammonia water to adjust the pH to 6.5, continue to stir for 1 hour, put it into a 50mL polytetrafluoroethylene-lined high-pressure reactor, put it into an electric blast drying oven, heat it to 220°C and keep it for 4 hours, then cool it down to room temperature naturally, and take out the reactant After three to four times of high-speed centrifugal washing, put it into an electric blast drying oven to keep warm at 120°C an...

example 3

[0024] Example 3: The chemical composition formula of this embodiment is Zn 2 GeO 4 : 0.005Eu 3+ The preparation method of the long afterglow material is as follows:

[0025] Take GeO 2 0.52364g was dissolved in 10mL 3mol / L NaOH solution to prepare Na 2 GeO 3 solution; called Zn(NO 3 ) 2 ·3H 2 O 5.2996g, Eu(NO 3 ) 3 ·6H 2 O 0.0043g was prepared into 100mL solution respectively, 10mL was taken respectively in the same 100mL beaker, 3μL of concentrated nitric acid was added and stirred for 5min, then Na 2 GeO 3 2 mL of solution. Take concentrated ammonia water to adjust the pH to 8.5, continue to stir for 1 hour, put it into a 50mL polytetrafluoroethylene-lined autoclave, put it into an electric blast drying oven, heat it to 220°C for 4 hours, then cool it down to room temperature naturally, and take out the reactant After three to four times of high-speed centrifugal washing, put it into an electric blast drying oven to keep warm at 120°C and dry for 12 hours, and ...

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Abstract

The chemical composition formula of the zinc-germanium oxide long-afterglow luminescent material is Zn2GeO4: XC, C is Eu < 3 + > or Dy < 3 + >, and X is greater than or equal to 0.001 and less than or equal to 0.1. The preparation method of the oxide comprises the following steps: taking a proper amount of raw materials to prepare a solution with a certain concentration, mixing in a beaker according to a certain proportion, adjusting to a required pH value, magnetically stirring uniformly, loading into a high-temperature reaction kettle with a polytetrafluoroethylene lining, heating to 220 DEG C, keeping the temperature for 4 hours, and cooling to room temperature after the reaction is finished, taking out a reaction product, centrifuging, washing and drying to obtain a product. The material obtained by the invention can emit green afterglow after being irradiated by ultraviolet light, the afterglow time can reach 500 seconds, and the long afterglow material takes Zn, Ge and O elements as a matrix and Dy < 3 + > or Eu < 2 + > as an afterglow luminescence center, and has better thermal stability and chemical stability. The innovation of the invention is that a rare earth material is introduced as an activator, the long-afterglow luminescent material is synthesized by a hydrothermal synthesis method, the synthesized long-afterglow luminescent material has small and relatively uniform particle size and excellent sustainable luminescence performance, and provides possibility for in-depth study of in-vivo imaging, biological targeted therapy and other medical fields.

Description

technical field [0001] The invention belongs to the technical field of luminescent materials, and relates to a zinc-germanium oxide long-lasting luminescent material and a preparation method thereof. Background technique [0002] Long afterglow material is a kind of photoluminescent material, which can absorb energy when the excitation light is irradiated, and continue to emit light after the excitation light stops. In recent years, long-lasting materials have become important materials in biomedicine due to their ability to maintain luminescence after the excitation is stopped, and have the special function of eliminating tissue autofluorescence. Long afterglow materials are mostly doped rare earth materials as activators, such as the main commercial long afterglow material SrAl 2 o 4 : Eu 2+ , Dy 3+ , and mostly synthesized by high-temperature solid-phase method, it has the characteristics of stable chemical properties, high afterglow brightness and long afterglow time...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/66
Inventor 纪妍妍郝兵涛李文静
Owner TIANJIN POLYTECHNIC UNIV
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