Prepn process of nano silver iodide powder

A nano-silver iodide and powder technology, which is applied in iodide preparation, nano-structure manufacturing, silver halide, etc., can solve problems such as complicated process technology, and achieve high purity, easy industrial scale production, and simple and easy-to-control process

Inactive Publication Date: 2006-10-18
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, which contains: 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 of 15-30 nm. ...

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 invention relates to a preparation method for obtaining nanoscale silver iodide powder. It is to slowly drop the clear silver nitrate aqueous solution containing silver nitrate 0.1~0.4M / L and complexing agent 0.034~0.2M / L to the solution containing potassium iodide 0.1~0.4M / L and complexing agent 0.034~0.2M / L, 0.01~0.04M / L potassium iodide clarified aqueous solution of dispersant and fully stirred at the same time, after standing and settling, nanometer silver iodide precipitate was obtained; the silver iodide precipitate was filtered, washed with water, and dried at a temperature of 80~100℃ After drying for 1-2.5 hours, nanometer silver iodide powder with particle size below 100nm is obtained. The process of the invention is simple and easy to control, pollution-free, stable in product quality, high in purity, low in cost, easy for industrial scale production, and overcomes the disadvantages of complicated process and high cost in the existing preparation method.

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