Method for synthesizing ZnS-doped nanometer luminescent material by oil-water interface method

A nano-luminescent material, oil-water interface method technology, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of difficult particle size control, easy agglomeration, low particle purity, etc., and achieve good application prospects, mild reaction conditions, and fluorescence intensity. high effect

Inactive Publication Date: 2011-01-12
DONGHUA UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

The hydrothermal method is inconvenient to operate, the prepared particles have low purity and are easy to agglomerate, the particle size is not easy to control, the particle size is large, and the product loss is large
The nano-luminescent materials synthesized by the microemulsion method have many excellent properties, but the synthesis yield is relatively low, and the crystallinity is poor, which seriously affects its photoelectric performance.

Method used

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  • Method for synthesizing ZnS-doped nanometer luminescent material by oil-water interface method
  • Method for synthesizing ZnS-doped nanometer luminescent material by oil-water interface method
  • Method for synthesizing ZnS-doped nanometer luminescent material by oil-water interface method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Take 1.2620g (0.002mol) of zinc stearate, dissolve it in 100ml of toluene at 100°C, add 7.5ml of oleic acid, stir evenly under nitrogen protection, and save it for later use;

[0038] (2) Take 0.5764g (0.0024mol) Na 2 S·9H 2 O was dissolved in 25ml of deionized water at 100°C, stirred evenly, and stored for later use;

[0039] (3) Add the sodium sulfide aqueous solution prepared in step 2 to the zinc stearate toluene solution prepared in step 1 within 10 minutes, under the temperature of 100°C and under the protection of nitrogen, the upper layer is electrically stirred, the lower layer is magnetically stirred for 2 hours, and anhydrous ethanol is added for precipitation , and then centrifuged, washed twice with absolute ethanol, and finally vacuum-dried to obtain ZnS nanomaterials.

[0040] image 3 It is a TEM image of ZnS nanomaterials prepared by reacting at 100°C for 2 hours. It can be estimated from the image that the average particle size of the particles ...

Embodiment 2

[0042] Change the zinc stearate quality in process 1 in embodiment 1 to 0.6310g and 2.5240g, and all the other reaction processes and conditions are unchanged.

[0043] Figure 5 It is the ultraviolet absorption diagram of the ZnS nanomaterials prepared when the zinc ion molar concentration is 0.01M, 0.02M and 0.04M respectively. It can be seen from the figure that when the zinc ion molar concentration is 0.02M, the ultraviolet absorption intensity of the obtained ZnS nanomaterial is the largest.

Embodiment 3

[0045] Change the stirring time in process 3 in Example 1 to 0.5h, 1.0h and 4h, and the rest of the reaction process and conditions remain unchanged.

[0046] Figure 6The ultraviolet absorption diagrams of the ZnS nanomaterials prepared when the reaction time is 0.5h, 1.0h, 2h and 4.0h respectively. It can be seen from the figure that when the reaction time is 2h, the ultraviolet absorption intensity of the obtained ZnS nanomaterials is the largest.

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Abstract

The invention relates to a method for synthesizing a ZnS-doped nanometer luminescent material by an oil-water interface method. In the method, deionized water and toluene are used as solvent, zinc stearate is used as a source of zinc ions, manganese stearate is used as a source of manganese ions, europium stearate is used as a source of europium ions, sodium sulfide is used as a source of sulfur ions, oleic acid is used as a surfactant, the reacting temperature is controlled by an oil bath, the upper oil phase is electrically stirred, and the lower water phase is magnetically stirred, so the whole reaction is performed in the protection of nitrogen. The method has the advantages of low cost, convenient operation, small pollution, high efficiency and the like, can prepare ZnS:Mn and ZnS:Eunanometer materials with higher fluorescent strength, can realize mass production of the ZnS:Mn and ZnS:Eu nanometer materials, and has excellent application prospect.

Description

technical field [0001] The invention belongs to the field of preparation of doped ZnS nano-luminescent materials, in particular to a method for synthesizing doped ZnS nano-luminescent materials by an oil-water interface method. Background technique [0002] Due to the small size effect, surface effect, quantum size effect and macroscopic quantum tunneling effect, nano-luminescent materials exhibit significantly different optical properties from bulk materials, and are widely used in sensors, solar cells, lasers, and nano-laser materials. Production, degradation of organic pollutants, and in drug detection, biological protein labeling, DNA quantitative analysis, etc., it shows a wide range of application prospects. [0003] Doped nanomaterials refer to the doping of transition metal ions [Wei Chen et al.J.Appl.Phys.2000, 88, 5188] or rare earth ions [Huang Yang et al.Mater.Lett.2004, 58, 1173], thereby enhancing the luminescent properties of traditional nanomaterials. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/56
Inventor 周兴平杜运兴
Owner DONGHUA UNIV
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