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Method for manufacturing nano-sized Fe3O4

A technique for producing ferroferric oxide and its manufacturing method, which is applied in the direction of iron oxide/iron hydroxide and ferric iron oxide, etc., which can solve the problems of non-continuous production, unfavorable environment and safety, and achieve short production cycle and favorable Environmentally friendly and safe

Inactive Publication Date: 2004-12-29
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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: one, 60 Co isotopes are radioactive substances, and when they cannot be utilized, they will become radioactive waste, which is harmful to the environment and safety; second, the preparation of nanomaterials with gamma rays is often intermittent 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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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, the addition is 9ml / 100m, making it to 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 u...

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, the addition amount is 10ml / 100m, 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 remo...

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Abstract

The present invention is preparing process of nano ferroferric oxide or superfine ferroferric oxide particle, and belongs to the field of nano material preparing technology in radiochemistry. The radiochemical process adopts ferric trichloride as iron particle source, ammonia water as precipitant, IPA as oxidizing free clearing agent in aqua, hydrophilic surfactant PVA for controlling crystal kernel growing speed and particle size, and electron accelerator to produce electron beam for irradiation treatment, and the solution after being irradiated is washed, centrifugally separated and stoved to obtain black nano ferroferric oxide powder. The present invention has simple technological process, short production period, no pollution, and high safety. The prepared nano ferroferric oxide has very low magnetic saturation strength and very small coercive force and is one excellent kind of 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 prospect of magnetic nanoparticles in the practical application of reagents, 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. , 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...

Claims

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Application Information

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IPC IPC(8): C01G49/08
Inventor 周瑞敏辛立辉
Owner SHANGHAI UNIV
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