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Preparation method of dispersed iron nanoparticles

A technology of nano-iron and particles, which is applied in the direction of nanotechnology, can solve the problems of high operating conditions, small particle size of nano-iron, inconvenient use, etc., and achieve the effect of easy process control, small particle size, and solution to agglomeration

Inactive Publication Date: 2011-07-27
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the small particle size, strong activity, easy coalescence, and easy oxidation of nano-iron, it is often used on the spot and must be isolated from oxygen during preparation and use. It is inconvenient to use and high in cost. Therefore, it is limited in practical applications. At present, the commonly used preparation methods are physical method and chemical method
Some methods are theoretically feasible, but the actual operating conditions are very demanding and not easy to implement

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Weigh ferric chloride, dissolve it in distilled water, and make a solution with an iron ion concentration of 0.8 mol / liter;

[0025] (2) Add surfactant soluble starch to the solution obtained in (1) to make the concentration reach 0.4 g / L, add complexing agent citric acid to make the concentration reach 0.004 g / L;

[0026] (3) Dilute the stock solution of TH-904 100 times and add it to the solution obtained in (2), so that the mass concentration of TH-904 reaches 0.2%;

[0027] (4) Dissolve sodium borohydride in distilled water to form a solution with a sodium borohydride content of 0.02 mol / liter;

[0028] (5) When the solution obtained in (3) is in a stirring state, drip the solution (4) to carry out the reduction reaction at a rate of 5 ml / s, and control the temperature at 20 degrees Celsius during the reaction until the reaction is complete;

[0029] (6) After the reaction in (5), the solid product obtained by the reaction was suction filtered, and the product ...

Embodiment 2

[0032] (1) Weigh ferric sulfate, dissolve it in a mixed solution of distilled water and absolute ethanol (volume ratio = 7:3), and make a solution with an iron ion concentration of 0.2 mol / L;

[0033] (2) Add surfactant soluble starch to the solution obtained in (1) to make its concentration reach 0.2 g / L, add complexing agent citric acid to make its concentration reach 0.002 g / L;

[0034] (3) Dilute the stock solution of TH-904 100 times and add it to the solution obtained in (2), so that the mass concentration of TH-904 reaches 0.1%;

[0035] (4) Dissolve sodium borohydride in distilled water to form a solution with a sodium borohydride content of 0.02 mol / liter;

[0036] (5) When the solution obtained in (3) is in a stirring state, drip the solution (4) to carry out the reduction reaction at a rate of 10 ml / s, and control the temperature at 20 degrees Celsius during the reaction until the reaction is complete;

[0037] (6) After the reaction in (5), the solid product obtai...

Embodiment 3

[0040] (1) Weigh ferrous chloride, dissolve it in distilled water, and make a solution with an iron ion concentration of 1.6 mol / liter;

[0041] (2) Add surfactant soluble starch to the solution obtained in (1) to make its concentration reach 0.4 g / L, add complexing agent citric acid to make its concentration reach 0.004 g / L;

[0042] (3) Dilute the stock solution of TH-904 by 100 times and add it to the solution obtained in (2), so that the mass concentration of TH-904 reaches 0.2%;

[0043] (4) Weigh potassium borohydride and dissolve it in distilled water to prepare a solution with a potassium borohydride content of 0.02 mol / liter;

[0044] (5) When the solution obtained in (3) is in a stirring state, drip the solution (4) into the reduction reaction at a rate of 5 ml / s, and control the temperature at 20 degrees Celsius during the reaction until the reaction is complete;

[0045] (6) After the reaction in (5), the solid product obtained by the reaction was suction filtered...

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Abstract

The invention discloses a preparation method of dispersed iron nanoparticles and relates to a preparation method of a metal nanomaterial. The method comprises the following steps of: preparing a solution by using a soluble divalent ferric salt or tervalent ferric salt serving as a raw material and distilled water or a mixed solution of distilled water and ethanol; adding a surfactant and a complexing agent; adding a dispersant; dropwise adding a prepared hydroboron aqueous solution in a stirring state; dropwise adding the prepared hydroboron aqueous solution at room temperature till fully reacting; performing suction filtration on the obtained reaction product; and washing with distilled water and absolute ethyl alcohol, and drying to obtain black dispersed iron nanoparticles. The produced iron nanoparticles have the advantages of small particle diameter, uniformity in dispersion, narrow particle diameter range, simple process, low cost and contribution to further expansion of the production scale.

Description

technical field [0001] The invention relates to a preparation method of nanometer metal material, in particular to a preparation method of dispersed nanometer iron particles. Background technique [0002] Generally, powders or materials with a particle size in the range of 1 to 100 nanometers (nm) are called nanomaterials. Nanomaterials are widely used in various fields because of their unique properties. Because of its transition region between macroscopic conventional fine powder and microscopic atomic clusters, nano-iron exhibits some unique properties, one of which is the surface effect. Due to its small particle size, large specific surface area, and strong surface activity, nano-iron has more unique advantages than ordinary iron powder in the remediation of pollutants. Many foreign studies have shown that nano-iron can reduce and remove many pollutants in water, such as dissolved organic chlorides, PCBs and nitrobenzene compounds. [0003] Due to the small particle ...

Claims

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Application Information

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IPC IPC(8): B22F9/24B82Y40/00
Inventor 冯婧微纪爽梁彦秋李辉邵红
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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