Ferriferous oxide nano-grade fiber, preparation method thereof, and purpose thereof

A ferric tetroxide and nanofiber technology, applied in chemical instruments and methods, iron oxide/iron hydroxide, nanotechnology, etc., can solve the problems of reducing specific surface area, adverse adsorption or degradation of organic pollutants, etc. Surface area, superior magnetic properties, scientific effects of preparation methods

Inactive Publication Date: 2012-05-23
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, no matter it is ferroferric oxide nanorods or its synthesis method, there are deficiencies. First, the surface of nanorods is smooth, which can only be formed by a dense structure, which greatly...

Method used

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  • Ferriferous oxide nano-grade fiber, preparation method thereof, and purpose thereof
  • Ferriferous oxide nano-grade fiber, preparation method thereof, and purpose thereof
  • Ferriferous oxide nano-grade fiber, preparation method thereof, and purpose thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] The concrete steps of preparation are:

[0030] Step 1, first mix the soluble iron salt, citrate (or citric acid) and water according to the ratio of 1.2:2.1:35 by weight and then stir evenly; wherein, the soluble iron salt is ferric chloride, and the citrate is lemon Na2SO4, water is deionized water to obtain a mixed solution. Then add gelatin to the mixed liquid, wherein the weight ratio between the gelatin and the water in the mixed liquid is 0.2:35, and the hydrosol is obtained after the gelatin is completely dissolved.

[0031] In step 2, the pH value of the hydrosol is first adjusted to 7 by using an alkali solution; wherein, the alkali solution is a sodium hydroxide solution to obtain a hydrosol precursor. Then put the hydrosol precursor in an airtight state and react at 180°C for 72 hours to obtain a product similar to figure 1 shown, and as figure 2 with image 3 Fe3O4 nanofibers shown in the curve.

Embodiment 2

[0033] The concrete steps of preparation are:

[0034] Step 1, first mix the soluble iron salt, citrate (or citric acid) and water according to the ratio of 1.3:2.0:38 by weight and then stir evenly; wherein, the soluble iron salt is ferric chloride, and the citrate is lemon Na2SO4, water is deionized water to obtain a mixed solution. Then add gelatin to the mixed liquid, wherein the weight ratio between the gelatin and the water in the mixed liquid is 1:38, and the hydrosol is obtained after the gelatin is completely dissolved.

[0035] In step 2, an alkaline solution is used to adjust the pH value of the hydrosol to 7.3; wherein, the alkaline solution is a sodium hydroxide solution to obtain a hydrosol precursor. Then put the hydrosol precursor in an airtight state and react at 195°C for 55h to obtain a product similar to figure 1 shown, and as figure 2 with image 3 Fe3O4 nanofibers shown in the curve.

Embodiment 3

[0037] The concrete steps of preparation are:

[0038] Step 1, first mix the soluble iron salt, citrate (or citric acid) and water according to the ratio of 1.4:1.9:40 by weight and then stir evenly; wherein, the soluble iron salt is ferric chloride, and the citrate is lemon Na2SO4, water is deionized water to obtain a mixed solution. Then add gelatin to the mixed liquid, wherein the weight ratio between the gelatin and the water in the mixed liquid is 2:40, and the hydrosol is obtained after the gelatin is completely dissolved.

[0039] In step 2, an alkaline solution is used to adjust the pH value of the hydrosol to 7.5; wherein, the alkaline solution is a sodium hydroxide solution to obtain a hydrosol precursor. Then put the hydrosol precursor in an airtight state and react at 210°C for 38 hours to obtain a product similar to figure 1 shown, and as figure 2 with image 3 Fe3O4 nanofibers shown in the curve.

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Abstract

The invention discloses ferriferous oxide nano-grade fiber, a preparation method thereof, and a purpose thereof. The fiber is composed of particles with mesopores. The diameter of the fiber is 30-200nm, and the length of the fiber is 10-20mum. The particle sizes of the particles are 5-10nm. The particles are ferriferous oxide monocrystals. The diameters of the mesopores are 5-40nm. The preparation method comprises steps that: soluble iron salt, citric acid or citrate, and water are well mixed according to a weight ratio of 1.2-1.6:1.7-2.1:35-45, such that a mixed liquid is obtained; gelatin is added to the mixed liquid, wherein the weight ratio of gelatin to water in the mixed liquid is 0.4-4:35-45; when gelatin is dissolved, a hydrosol is obtained; the pH value of the hydrosol is regulated to 7-8 by using an alkali solution, such that a hydrosol precursor is obtained; the hydrosol precursor is placed in a sealed environment, and is subject to a reaction for 4-27h under a temperature of 180-240 DEG C, such that the ferriferous oxide nano-grade fiber is prepared. The ferriferous oxide nano-grade fiber product can be adopted as an absorbent widely applied for removing polychlorinated biphenyl and heavy metal ions in solutions.

Description

technical field [0001] The present invention relates to a kind of nanofiber and preparation method and application, especially a kind of ferric oxide (Fe 3 o 4 ) nanofibers and their preparation and use. Background technique [0002] As we all know, Fe3O4 nanomaterials have great application value in magnetic devices, protein separation, drug loading and release, early diagnosis and treatment of cancer, and magnetic storage. Therefore, people have made some attempts and efforts to obtain ferric oxide with different shapes and sizes. Synthesis of Materials". This article discloses the homogeneous synthesis of ferric oxide nanorods using urea as a precipitant, wherein the ferric oxide nanorods have a diameter of 60-70 nm and a length of 2 μm. However, no matter it is ferroferric oxide nanorods or its synthesis method, there are deficiencies. First, the surface of nanorods is smooth, which can only be formed by a dense structure, which greatly reduces its specific surface a...

Claims

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Application Information

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IPC IPC(8): C01G49/08B82Y40/00B01J20/06C02F1/28C02F1/62C02F1/58
Inventor 韩成良蔡伟平
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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