Prepn process of nano silver iodide powder

A nano-silver iodide and powder technology is applied in the preparation of iodide, nano-structure manufacturing, silver halide and other directions, which can solve the problems of complex process technology and achieve the effects of high purity, stable product quality, and simple and easy-to-control process.

Inactive Publication Date: 2005-09-28
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method also has the disadvantage of complicated process technology

Method used

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  • Prepn process of nano silver iodide powder
  • Prepn process of nano silver iodide powder

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Nano silver iodide powder is prepared according to the following process steps.

[0019] a. Prepare the following two solutions respectively:

[0020] Silver nitrate clarified aqueous solution, containing in this solution: silver nitrate 0.1M / L, citric acid (complexing agent) 0.034M / L;

[0021] Potassium iodide clarified aqueous solution, containing in this solution: Potassium iodide 0.1M / L, citric acid (complexing agent) 0.034M / L, sodium dodecylsulfonate (dispersant) 0.01M / L;

[0022] B. at normal temperature, normal pressure, the silver nitrate clarified aqueous solution of above-mentioned preparation is slowly added dropwise in the potassium iodide clarified aqueous solution and fully stirs simultaneously, obtains nano-silver iodide precipitation after standing and settling;

[0023] c. The above nano-silver iodide precipitate is filtered, washed with water three times, and dried at 80-100° C. for 1-2.5 hours to obtain nano-silver iodide powder with a particle size ...

Embodiment 2

[0033] Nano silver iodide powder is prepared according to the following process steps.

[0034] a. Prepare the following two solutions respectively:

[0035] Silver nitrate clarified aqueous solution, containing in this solution: silver nitrate 0.4M / L, citric acid (complexing agent) 0.136M / L;

[0036] Potassium iodide clarified aqueous solution, containing in this solution: potassium iodide 0.4M / L, citric acid (complexing agent) 0.136M / L, sodium dodecylsulfonate (dispersant) 0.04M / L;

[0037] B. at normal temperature, normal pressure, the silver nitrate clarified aqueous solution of above-mentioned preparation is slowly added dropwise in the potassium iodide clarified aqueous solution and fully stirs simultaneously, obtains nano-silver iodide precipitation after standing and settling;

[0038] c. The above nano-silver iodide precipitate is filtered, washed with water three times, and dried at 80-100° C. for 1-2.5 hours to obtain nano-silver iodide powder with a particle size ...

Embodiment 3

[0040] Nano silver iodide powder is prepared according to the following process steps.

[0041] a. Prepare the following two solutions respectively:

[0042] Silver nitrate clear aqueous solution, containing in this solution: silver nitrate 0.25M / L, citric acid (complexing agent) 0.085M / L;

[0043] Potassium iodide clarified aqueous solution contains: potassium iodide 0.25M / L, citric acid (complexing agent) 0.085M / L, sodium dodecylsulfonate (dispersant) 0.025M / L;

[0044] B. at normal temperature, normal pressure, the silver nitrate clarified aqueous solution of above-mentioned preparation is slowly added dropwise in the potassium iodide clarified aqueous solution and fully stirs simultaneously, obtains nano-silver iodide precipitation after standing and settling;

[0045] c. The above nano-silver iodide precipitate is filtered, washed with water three times, and dried at a temperature of 80-100° C. for 1-2.5 hours to obtain nano-silver iodide powder with a particle size of 2...

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Abstract

The present invention relates to the preparation process of nanometer silver iodide powder. Clear silver sulfate water solution containing silver nitrate in 0.1-0.4 M/L and complexing agent in 0.034-0.2 M/L is dropped slowly into clear potassium iodide water solution containing potassium iodide in 0.1-0.4 M/L, complexing agent in 0.034-0.2 M/L and dispersant in 0.01-0.04 M/L at normal temperature and normal pressure via stirring, and the product is let stand to deposit to obtain nanometer silver iodide deposit. The nanometer silver iodide deposit is filtered, washed and dried at 80-100 deg.c for 1-2.5 hr to obtain nanometer silver iodide powder with granularity below 100 nm. The process is easy to control, pollution-free and suitable for industrial production, and the product has high quality and low cost.

Description

technical field [0001] The invention relates to a method for preparing nano-scale silver iodide powder, in particular to a preparation method for directly obtaining nano-scale silver iodide powder by using a chemical reaction method. Background technique [0002] Silver iodide is used as photosensitive emulsion and medicine in photography, especially as antibacterial drug. Silver iodide is a good artificial ice nucleus in cold clouds. It is the most widely used and most effective nucleation in weather modification operations at home and abroad. agent. The artificial rainfall catalyst is made of silver iodide powder with nano-scale ultrafine particles, and its effect is more prominent. [0003] The preparation method of nano-silver iodide powder has not been reported in the country, and there are preparation method reports in foreign literature, such as: "Ionicconductivity of nano-scale γ-AgI" [Physica B 325 (2003) 357-361] is the use of commercial micron Put the high-grade...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B82B3/00C01B9/06C01G5/02
Inventor 刘先黎江中浩连建设李光玉金德镇
Owner JILIN UNIV
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