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Aqueous phase method for manufacturing core formation doping ZnS:Mn and ZnS:Mn/ZnS nanocrystalline

A water-phase preparation and nanocrystal technology, which is applied in the direction of chemical instruments and methods, luminescent materials, etc., can solve the problems of complex operation and high reaction temperature, and achieve the effects of good water solubility, good photostability and mild reaction conditions

Inactive Publication Date: 2008-08-20
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its preparation process is completed in the organic phase, the reaction temperature is high (240°C-280°C), and the operation is complicated. The whole process must be carried out under anhydrous and oxygen-free conditions.

Method used

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  • Aqueous phase method for manufacturing core formation doping ZnS:Mn and ZnS:Mn/ZnS nanocrystalline
  • Aqueous phase method for manufacturing core formation doping ZnS:Mn and ZnS:Mn/ZnS nanocrystalline
  • Aqueous phase method for manufacturing core formation doping ZnS:Mn and ZnS:Mn/ZnS nanocrystalline

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1. Take 2.4508g (0.01mol) of manganese acetate, add 100ml of 0.12M thioglycolic acid (TGA) aqueous solution at 25°C, adjust the pH to 4.5 with 10M NaOH, stir well, store at room temperature for later use, and control the mole of Mn and thioglycolic acid The ratio is 1:1.2;

[0026] 2. Take 2.1951g (0.01mol) of zinc acetate, add 100ml of 0.12M thioglycolic acid aqueous solution at 25°C, adjust the pH to 4.5 with 10M NaOH, stir well, store at room temperature for later use, and control the molar ratio of Zn to thioglycolic acid to 1 : 1.2;

[0027] 3. Take 4.8036g (0.01mol) of sodium sulfide, add 200ml of deionized water at 25°C, stir well, and store at room temperature for later use;

[0028] 4. Take 1ml of the Mn-TGA solution (Mn precursor) prepared in step 1, quickly add it into 200ml of the S precursor solution prepared in step 3 at 80°C, and stir vigorously at 80°C for 20min.

[0029] 5. Take 100ml of the Zn-TGA solution (Zn precursor) prepared in step 2, quickly a...

Embodiment 2

[0033] 1, prepare ZnS by process 1-5 in embodiment 1: Mn nano crystal aqueous solution, wherein the zinc precursor volume in step 1 is changed into 75ml, the aging time in step 5 is changed into 10h;

[0034] 2. Quickly add 25ml of Zn-TGA solution to the solution obtained in step 1 at 80°C, and stir vigorously for 2 hours;

[0035] 3. Obtain ZnS:Mn / ZnS nanocrystalline phosphor according to step 6 in Example 1.

Embodiment 3

[0037] The temperature of the water bath in Example 1 or Example 2 was changed to 65° C., all the other reaction processes and conditions were unchanged, and the obtained results were the same as those in Example 1 or Example 2.

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Abstract

The invention discloses a water phase preparation method of nucleating doped nano-crystal of ZnS: Mn and ZnS: Mn or ZnS, deionized water is regarded as solvents, zinc salt is regarded as the source of zinc ion, manganese salt is regarded as the source of manganese ion, sodium sulfide is regarded as the source of sulfur ion, mercapto carboxylic acid is regarded as stabilizer, water bath or oil bath is used for controlling the reaction temperature, the whole reaction process is carried on in the air, the method has the advantages of the low cost, the simple operation, the whole process being carried on in the air, innocuity, and no pollution, the nano-crystal of ZnS: Mn and ZnS: Mn or ZnS has the high strength, the good light stability, and the good water solubility, the method of the invention can realize the mass production of the nano-crystal of ZnS: Mn and ZnS: Mn or ZnS.

Description

technical field [0001] The invention relates to a water phase preparation method for nucleation doping ZnS:Mn and ZnS:Mn / ZnS nano crystals. Background technique [0002] Due to the quantum size effect, semiconductor nanocrystals exhibit significantly different optical properties from bulk materials, and their size-dependent optical properties are used in light-emitting diodes, solar cells, quantum lasers, and biomarkers, showing broad application prospects. [0003] Doped nanocrystals refer to doping transition metal ions or rare earth ions into traditional semiconductor nanocrystals, so that they have optical properties different from traditional nanocrystals. In 1994, N.Bhargva et al first reported Mn-doped ZnS nanocrystals with high fluorescence intensity and short lifetime (R.N.Bhargva et al.Phys.Rev.Lett 1994, 72, 416), thus making doped semiconductor nanocrystals Crystal has become a research hotspot of luminescent materials. [0004] At present, the commonly used me...

Claims

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Application Information

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IPC IPC(8): C09K11/57C09K11/56
Inventor 肖奇肖翀
Owner CENT SOUTH UNIV
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