Method for Batch Synthesis of Water-dispersed Small Size Ultra-Long Near Infrared Afterglow Nanoparticles

A nanoparticle and small particle size technology, applied in nanotechnology, nano optics, nanotechnology, etc., can solve the problems of low yield and poor water dispersibility of materials, and achieve better water dispersibility, small particle size, and signal-to-noise The effect of improving

Active Publication Date: 2020-11-06
NANKAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The traditional high-temperature calcination method requires grinding and particle size separation before it ca

Method used

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  • Method for Batch Synthesis of Water-dispersed Small Size Ultra-Long Near Infrared Afterglow Nanoparticles
  • Method for Batch Synthesis of Water-dispersed Small Size Ultra-Long Near Infrared Afterglow Nanoparticles
  • Method for Batch Synthesis of Water-dispersed Small Size Ultra-Long Near Infrared Afterglow Nanoparticles

Examples

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Effect test

Embodiment 1

[0014] A method for batch synthesis of water-dispersed small-size, ultra-long near-infrared afterglow nanoparticles. The method is characterized in that the long afterglow nanoparticles calcined at high temperature are synthesized in batches by using a metal complexing agent solution for hydrothermal post-treatment. Proceed as follows:

[0015] 1) According to the general chemical formula ZnGa 2 o 4 : Cr 0.004 , mix Zn, Ga, Cr with a molar ratio of 1:2:0.004 nitrate solution, and then adjust the solution to be alkaline with tert-butylamine.

[0016] 2) Put the above solution, the same amount of toluene and 2mL oleic acid into a 50mL Teflon-lined reaction kettle, and put it in an oven at 160°C for 24 hours to react.

[0017] 3) The above suspension was poured into ethanol and then centrifuged, and the obtained precipitate was washed twice with ethanol and water respectively, and then dried at 80°C.

[0018] 4) Calcining the above solid in a muffle furnace at 1000° C. for 1...

Embodiment 2

[0026] A method for batch synthesis of water-dispersed small-size, ultra-long near-infrared afterglow nanoparticles. The method is characterized in that the long afterglow nanoparticles calcined at high temperature are synthesized in batches by using a metal complexing agent solution for hydrothermal post-treatment. Steps and methods are basically the same as in Example 1, except that the chemical general formula of long afterglow in step 1 is Zn 3 Ga 2 Ge 2 o 10 : Cr 0.004 , the proportion of metal nitrate added changes accordingly. The detection result of the prepared nanomaterial is similar to that of Example 1.

Embodiment 3

[0028] A method for batch synthesis of water-dispersed small-size, ultra-long near-infrared afterglow nanoparticles. The method is characterized in that the long afterglow nanoparticles calcined at high temperature are synthesized in batches by using a metal complexing agent solution for hydrothermal post-treatment. The steps and method are basically the same as in Example 1, except that the difference is that the general chemical formula of long afterglow in step 1 is Zn 5 Ga 6 GeO 16 : Cr 0.02 Yb 0.1 Er 0.01 , the proportion of metal nitrate added changes accordingly. The detection result of the prepared nanomaterial is similar to that of Example 1.

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Abstract

The invention relates to a method for synthesizing water-dispersed small-particle size ultra-long near-infrared afterglow nanoparticles in batch. The method is characterized in that the long afterglownanoparticles after high-temperature calcination are synthesized in batch by adopting a method for hydrothermal post-treatment with a metal complexing agent solution. The method comprises the following steps: 1) uniformly mixing metal nitrate in proportion, synthesizing nanoparticles through hydrothermal or solvothermal treatment and then calcining at a temperature of 750-1200 DED C; 2) dispersing a product in the step 1) in the metal complexing agent solution, adding alkali, adjusting to the alkalinity and stirring at a room temperature; 3) transferring mixed liquid in the step 2) into a reaction kettle and reacting for 18-72 hours at a temperature of 180-220 DEG C; and 4) performing suspension centrifugation after reaction, and washing and drying a product. The method provided by the invention has the advantages that each of the nanoparticles obtained has a particle size of 5-30 nanometers and an afterglow time of 15-30 days, is dispersed in water for 12-72 hours and has a luminescent wavelength of longer than 685 nanometers; the method is simple and easy to operate, and the obtained product is high in water dispersibility, small in particle size, ultra-long in afterglow and suitable for large-scale application to anti-counterfeiting ink, biomedical sensing and imaging, 3D printing materials and the like.

Description

technical field [0001] The invention relates to the synthesis technology of long afterglow nanoparticles, in particular to the post-treatment method of long afterglow nanoparticles calcined at high temperature. Background technique [0002] Long afterglow luminescent materials refer to materials that can continue to emit light after the material stops being excited, so they are also called light-storing luminescent materials and luminescent materials. Long glow material is essentially a photoluminescent material, but compared with general luminescent materials, the afterglow time is as long as several hours to dozens of days. Although long afterglow materials were discovered as early as the 17th century, their preparation technology is immature, and the principle of luminescence has not been understood, which limits the wide application of long afterglow materials. Since the synthesis of green luminescent long afterglow material SrAl in 1996 2 o 4 : Since Eu, Dy, long aft...

Claims

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Application Information

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IPC IPC(8): C09K11/68C09K11/80B82Y20/00B82Y40/00
CPCB82Y20/00B82Y40/00C09K11/682C09K11/7776
Inventor 王荷芳陈曦朱义州
Owner NANKAI UNIV
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