Preparation method of ClO3- ionic liquid dispersed iron nanoparticles

A technology of ionic liquid and nano-iron, which is applied in the direction of nanotechnology, can solve the problems of high requirements on operating conditions, small particle size of nano-iron, and difficult to achieve, and achieve easy process control, small particle size, and dispersion performance good effect

Inactive Publication Date: 2014-03-05
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

[0026] Prepare dispersed nano-iron particles, the preparation steps are:

[0027] (1) Weigh ferric chloride, dissolve it in distilled water, and make a solution with an iron ion concentration of 0.8 mol / liter;

[0028] (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;

[0029] (3) ClO 3 - (Chlorate ion)-type ionic liquid stock solution was diluted 100 times and then added to the solution obtained in (2) so that the content was 2:100 (volume ratio).

[0030] (4) Dissolve sodium borohydride in distilled water to form a solution with a sodium borohydride content of 0.02 mol / liter;

[0031] (5) When the solution obtained in (3) is in a stirring state, drip the solution (4) into the reduction reaction at a rate of 1.5 ml / s, and control the temperature at 20 degrees Celsius during the reaction until the reaction is complete;

[0032] (6) After the...

Embodiment 2

[0035] Prepare dispersed nano-iron particles, the preparation steps are:

[0036] 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;

[0037] (8) 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;

[0038] (9) ClO 3 - (chlorate ion) type ionic liquid. Dilute the stock solution by 100 and add it to the solution obtained in (2) to make the content 3:100 (volume ratio).

[0039] (10) Weigh sodium borohydride and dissolve it in distilled water to prepare a solution with a sodium borohydride content of 0.02 mol / liter;

[0040] (11) When the solution obtained in (3) is in a stirring state, drip the solution (4) into the reduction reaction at a rate of 1 ml / s, and control the temperature at 20 degrees Celsius during the reacti...

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Abstract

The invention relates to a preparation method of iron nanoparticles, in particular to a preparation method of ClO3- ionic liquid dispersed iron nanoparticles. According to the method, by adding certain dispersant, soluble ferrous or ferric iron salt is dissolved in distilled water (or mixture of distilled water and ethyl alcohol) to form iron salt solution by means of liquid-phase chemical reduction; reducing agent with strong reducibility, such as hydroboron, is directly used to reduce iron ions into zero-valent iron; a product is filtered and washed and vacuum-dried so as to obtain well-dispersible iron nano-powder material with the nano-micro structure. The iron nanoparticles prepared are spherical with small diameter and narrow particle size range and have certain oxidation resistance. The iron nanoparticles prepared by the method are well dispersible, and the problem that iron nanoparticles agglomerate easily is solved effectively. The products are high in purity and small and even in particle size, the process is simple and easy to control, the preparation method is performed under normal temperature and normal pressure, and actual production needs are met.

Description

technical field [0001] The present invention relates to a kind of preparation method of nano-iron particles, in particular to a kind of ClO 3 - A method for preparing nano-iron particles dispersed in an ionic liquid. 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...

Claims

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Application Information

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IPC IPC(8): B22F9/24B82Y40/00
Inventor 冯婧微宁志高王晓丹
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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