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Process for preparing nano zinc sulfide

A technology of nano-zinc sulfide and zinc sulfate, applied in the direction of zinc sulfide, etc., can solve the problems of large particle size of nano-zinc sulfide, complex process, uneven dispersion, etc., and achieve environmental protection, simple process flow, and good safety. Effect

Inactive Publication Date: 2006-08-23
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The nano zinc sulfide particles prepared by the above method have the disadvantages of large particle size or uneven dispersion, and the process is complicated, requiring complex conditions such as catalysts or higher temperatures.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The preparation method and steps in this embodiment are as follows:

[0016] (1) Take a certain amount of zinc sulfate and sodium thiosulfate and dissolve them in deionized water respectively to prepare a solution, then mix the two to make a reaction mixed solution; the molar concentration of zinc sulfate is 0.20mol / L, sodium thiosulfate The molar concentration of the solution is 0.50mol / L; a small amount of surfactant polyethylene glycol is added to the mixed solution to prevent particle agglomeration; and isopropanol is added as a OH free radical scavenger in an amount of 20ml / 100ml;

[0017] (2) Put the plastic ziplock bag containing the above-mentioned prepared solution under the electron beam produced by the GJ-2 type electron accelerator to irradiate, and the irradiation dose is 260KGy;

[0018] (3) After irradiation, centrifuge the suspension reaction solution, and then wash the precipitate with nitrogen-filled distilled water and absolute ethanol several times; ...

Embodiment 2

[0021] The preparation steps of the present embodiment are exactly the same as those of the above-mentioned Example 1, and the difference is that the molar concentration of the zinc sulfate solution used is 0.12mol / L, and the molar concentration of the sodium thiosulfate solution is 0.25mol / L. Dialkyl sodium sulfate is used as a surfactant; the amount of isopropanol added is 15ml / 100ml, and the electron beam irradiation dose is 300KGy; after irradiation, the suspension is centrifuged, washed, and vacuum-dried to obtain its own nano Zinc sulfide powder.

[0022] The sample that above-mentioned embodiment makes is tested by X-ray diffractometer, matches by the peak value of standard powder diffraction card (PDF card 05-0566) by the characteristic peak in diffractogram, thus can determine that this white powder is pure nano zinc sulfide .

[0023] From the JEM-200CX high-resolution transmission electron microscope observation, it can be seen that the sample particles are spheric...

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Abstract

The present invention relates to the preparation process of nanometer zinc sulfide, and belongs to the field of radiochemical nanometer material preparing technology. The preparation process includes the following steps: compounding water solution of zinc sulfate and water solution of sodium thiosulfate; mixing to form mixed reaction solution with zinc sulfate in the concentration of 0.12-0.20 mol / L and sodium thiosulfate in the concentration of 0.25-0.50 mol / L; adding surfactant polyglycol or sodium dodecyl sulfate and free radical -OH eliminating agent isopropanol in the amount of 15-20 ml / 100ml; irradiating the mixture solution with electron beam an electron accelerator produces in the dosage of 250-300 KGY; separating the irradiated reaction suspension centrifugally, washing the precipitate with N2 inflated distilled water and absolute ethanol alcohol for several times, and vacuum drying at 60 deg.c for 6-8 hr to prepare white nanometer zinc sulfide powder of average size 20 nm.

Description

technical field [0001] The invention relates to a preparation method of nano-zinc sulfide, which belongs to the technical field of radiation chemical nano-material manufacturing technology. Background technique [0002] Zinc sulfide is a semiconductor material with a bandgap of 368KJ / mol, piezoelectric and pyroelectric properties, and good luminescent properties. It can be used in many fields such as phosphor powder, solar cell, infrared window material, color picture tube and raw material for producing color powder. [0003] At present, the disclosed methods for preparing nano zinc sulfide powder are as follows: (1) elemental direct method: this method has disadvantages such as high reaction energy consumption, large product particle size, high impurity content, etc., and is basically used in research and application at present. Elimination; (2) uniform sinking method; (3) sol-gel method; (4) hydrothermal method. The nano zinc sulfide particles prepared by the above metho...

Claims

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Application Information

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IPC IPC(8): C01G9/08
Inventor 周瑞敏饶卫红陈永康
Owner SHANGHAI UNIV
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