Method for manufacturing nano-sized Fe3O4

A technology of ferric tetroxide and a manufacturing method, applied in the directions of ferric oxide/ferric hydroxide, ferrous oxide, etc., can solve the problems of becoming radioactive waste, unfavorable environment and safety, and incapable of continuous production, etc. The effect of environmental protection, short production cycle and easy production method

Inactive Publication Date: 2006-06-21
SHANGHAI UNIV
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Problems solved by technology

[0004] The preparation of nanomaterials by irradiation chemical technology is a relatively new method. At present, the gamma ray radiation method is widely used, which uses cobalt 60 The γ-ray irradiation reaction system released by Co isotope to obtain nanomaterials has some disadvantages: first, 60Co isotope is a radioactive substance, and when it cannot be utilized, it will become radioactive waste, which is harmful to the environment and safety; , the preparation of nanomaterials with γ-rays is often discontinuous and cannot be produced continuously
Judging from the current situation, there are no other suitable radiation sources to prepare nano-ferric oxide materials.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0016] Embodiment one: the specific preparation steps of this embodiment are as follows:

[0017] a. First, weigh a certain amount of ferric trichloride with FA1004 upper dish electronic balance, dissolve it in distilled water, and make the concentration of iron ion reach 0.05mol / 100ml; then add hydrophilic surfactant polymer Vinyl alcohol (PVA), the addition amount is 0.7 g / 100ml; after stirring evenly, add oxidative free radical OH radical scavenger isopropanol (IPA), the addition amount is 20ml / 100ml; then add ammonia water (NH 3 )·H 2 O, add-on is 9ml / 100ml, makes it form ferric hydroxide colloidal solution;

[0018] b. The colloidal solution prepared above is irradiated under the radiation of the electron beam produced by the 2.5Mev, 40mA denamitron electron accelerator, and its irradiation dose is 30Mrad;

[0019] c. Then wash the irradiated sample with deionized water at 50°C, and centrifuge it in a high-speed centrifuge, repeating it several times to remove unreacted...

Embodiment 2

[0025] Embodiment two: the specific preparation steps of this embodiment are as follows:

[0026] a. First, weigh a certain amount of ferric trichloride with FA1004 upper dish electronic balance, dissolve it in distilled water, and make the concentration of iron ion reach 0.16mol / 100ml; then add hydrophilic surfactant polymer Vinyl alcohol (PVA), the addition amount is 0.8 g / 100ml; after stirring evenly, add oxidative free radical OH radical scavenger isopropanol (IPA), the addition amount is 30ml / 100ml; then add ammonia water (NH 3 )·H 2 O, add-on is 10ml / 100ml, makes it form ferric hydroxide colloidal solution;

[0027] b. The colloidal solution prepared above is irradiated under the radiation of the electron beam produced by the 2.5Mev, 40mA denamitron electron accelerator, and the irradiation dose is 50Mrad;

[0028] c. Then wash the irradiated sample with deionized water at 60°C, and centrifuge it in a high-speed centrifuge, repeating it several times to remove unreacte...

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Abstract

The invention relates to a method for manufacturing nanometer ferric oxide, that is, a method for preparing ultrafine particles of ferric oxide, which belongs to the technical field of radiation chemistry manufacturing nanometer materials. A method for manufacturing nano ferric oxide, which is mainly prepared by radiation chemistry. In the process, ferric chloride is mainly used as the source of iron particles, ammonia water is used as a precipitant, and isopropanol (IPA) is used as an aqueous solution. Medium-oxidizing free radical scavenger; and control the growth rate of the crystal nucleus to control the particle size through the hydrophilic surfactant polyvinyl alcohol (PVA), and use the electron beam generated by the electron accelerator to irradiate, and the radiation The irradiated solution is washed, centrifuged and dried to obtain black nanometer ferric oxide powder. The invention has simple technological process, short production cycle, no pollution, no pollution and good safety. The prepared nano ferroferric oxide has extremely small magnetic saturation strength and coercive force, and is a very good supermagnetic material and soft magnetic material.

Description

technical field [0001] The invention relates to a method for manufacturing nanometer ferric oxide, that is, a method for preparing ultrafine particles of ferric oxide, which belongs to the technical field of radiation chemistry manufacturing nanometer materials. Background technique [0002] In recent years, due to the broad prospects of magnetic nanoparticles in practical applications, the research on the preparation method and properties of magnetic nanoparticles has received great attention. In terms of magnetic recording materials, magnetic nanoparticles are expected to replace traditional micron-sized magnetic powders. Used for high-density magnetic recording materials; in the biological field, magnetic microspheres made of magnetic nanomaterials can be widely used in the separation of magnetic immune cells, nuclear magnetic resonance imaging, drug targeting, and controlled release. [0003] There are many methods for preparing nano-ferric oxide, which can be generally ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G49/08
Inventor 周瑞敏辛立辉
Owner SHANGHAI UNIV
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