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Method for preparing nanometer sulfides powder

A powder material, sulfide technology, applied in chemical instruments and methods, lead sulfide, zinc sulfide, etc., can solve the problems of large particle size, wide size range, low purity, etc., achieve narrow particle size distribution, avoid agglomeration, The effect of high powder purity

Inactive Publication Date: 2006-04-12
SHANGHAI UNIV
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Problems solved by technology

[0002] At present, the preparation of nanomaterials is mainly divided into physical methods and chemical methods. The chemical precipitation method is one of the more common chemical methods. Its advantage is that the process is simple and suitable for the preparation of nano-oxide powder materials. Its disadvantages are low purity and particle size. Larger, wide size range

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  • Method for preparing nanometer sulfides powder

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example 1

[0015] Example 1: ZnSO 4 13.72g (0.085mol) was formulated to a concentration of 1.0×10 -4 mol / L solution, add 6g (0.6%) quaternary ammonium salt, Na 2 S9.95g was formulated into a solution with a concentration of 1.0×10 -3 mol / L. Na 2 S solution was slowly dropped into ZnSO 4 In the solution, stir rapidly at the same time, continue to stir for a period of time after the addition, then filter, wash with water, dry, and calcined at 750°C. Finally, 6.22 g of white ZnS powder was obtained, with a particle size of 20-120 nm.

Embodiment 2

[0016] Embodiment two: the CdSO 4 18.81g (0.09mol) was formulated to a concentration of 1.2×10 -4 mol / L solution, add 4.57g (0.5%) quaternary ammonium salt, Na 2 S10.53g was formulated into a solution with a concentration of 1.0×10 -3 mol / L. Na 2 S solution was slowly dropped into CdSO 4 In the solution, stir rapidly at the same time, continue to stir for a period of time after the addition, then filter, wash with water, dry, and calcined at 750°C. Finally, 10.40 g of orange CdS powder was obtained, with a particle size of 20-100 nm.

Embodiment 3

[0017] Embodiment three: Pb(NO 3 ) 2 52.99g (0.16mol) was formulated to a concentration of 2.0×10 -4 mol / L solution, add 10.00g (0.9%) quaternary ammonium salt, Na 2 S18.73g was formulated into a solution with a concentration of 1.0×10 -3 mol / L. Na 2 S solution was slowly dropped into Pb(NO 3 ) 2 In the solution, stir rapidly at the same time, continue to stir for a period of time after the addition, then filter, wash with water, dry, and calcined at 750°C. Finally, 34.45 g of blue PbS powder was obtained, with a particle size of 50-140 nm.

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Abstract

A process for preparing sulfide nano-particles includes such steps as preparing the solution of metal salt, adding quaternary ammonium salt, dripping the solution of sodium sulfide in it to generate deposit, filter, water washing, removing the ions of impurities, drying and calcining.

Description

technical field [0001] The invention relates to a preparation method of nanometer sulfide powder material. Background technique [0002] At present, the preparation of nanomaterials is mainly divided into physical methods and chemical methods. The chemical precipitation method is one of the more common chemical methods. Its advantage is that the process is simple and suitable for the preparation of nano-oxide powder materials. Its disadvantages are low purity and particle size. Larger with a wide range of sizes. Invention content: [0003] One of the objectives of the present invention is to provide a method for preparing nano-sulfide powder material, which uses quaternary ammonium salt as a dispersant to prepare nano-oxide powder material. [0004] Quaternary ammonium salts are widely used in hair and skin care products, see US Patent No. USP4978526, and their sources are extensive. The structure of the quaternary ammonium salt is: [0005] [0006] Utilizing the un...

Claims

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Application Information

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IPC IPC(8): C01G21/21C01G19/00C01G11/02C01G9/08
Inventor 姜沪章建民孙弘刚
Owner SHANGHAI UNIV
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