a magnetic fe 2 o 3 /fe 3 o 4 Preparation method of nano-heterogeneous particles

A heterogeneous body, fe2o3 technology, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of difficult control of preparation technology, limited particle application research, and difficult process control. Achieve the effect of fewer types of raw materials, less equipment requirements, and a shorter preparation cycle

Active Publication Date: 2016-08-31
江阴智产汇知识产权运营有限公司
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AI Technical Summary

Problems solved by technology

As reported in the literature (J. Magn. Magn. Mater., 2004, 272-276: 1776-1777), the α-Fe 2 o 3 Reduction at 350°C for 0.5-6 h in an atmosphere of 95% argon and 5% hydrogen, followed by calcination at 1100°C for 3 h under the protection of helium to prepare magnetic Fe 2 o 3 / Fe 3 o 4 Nano-heterogeneous particles, the preparation process is complicated, the process control is difficult, and hydrogen reduction is used, the operation control is relatively strict, the requirements are high, the requirements for equipment are high, the gas cannot be leaked, and improper operation will bring safety hazards; at the same time, The use of rare gas protection pollutes the environment and high preparation costs; literature (Mater. Lett., 2015, 138: 164-166) prepared Fe by hydrothermal method 3 o 4 nanoparticles, and then placed in FeCl dissolved in PVP and urea 3 Aged at 90°C for 24 hours, the Fe 2 o 3 / Fe 3 o 4 nano-heterogeneous particles
Although this process is not dangerous, after a tedious preparation process and complicated control process, the production cycle is long, and the Fe prepared by the two-step method 2 o 3 / Fe 3 o 4 Nanoheterogeneous particles exceeding 100 nm severely limit the application research of particles in biomedicine
[0005] Aiming at the deficiencies of the traditional preparation process, the present invention adopts the method combining sol combustion-gel calcination to prepare magnetic Fe2O3 / Fe3O4 nano-heterogeneous particles make up for the shortcomings of the existing preparation technology, such as cumbersome preparation technology and difficult control, and provide a It can effectively reduce and avoid potential safety hazards, simplify the preparation process, shorten the preparation cycle, increase its yield per unit time, and enable large-scale production of magnetic Fe2O3 / Fe3O4 nano-heterogeneous particles, and the prepared magnetic Fe2O3 / Fe3O4 nano-heterogeneous particles have a small particle size, which is convenient for application research in biomedicine

Method used

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  • a magnetic fe <sub>2</sub> o <sub>3</sub> /fe <sub>3</sub> o <sub>4</sub> Preparation method of nano-heterogeneous particles
  • a magnetic fe <sub>2</sub> o <sub>3</sub> /fe <sub>3</sub> o <sub>4</sub> Preparation method of nano-heterogeneous particles
  • a magnetic fe <sub>2</sub> o <sub>3</sub> /fe <sub>3</sub> o <sub>4</sub> Preparation method of nano-heterogeneous particles

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Add 8.08 g of ferric nitrate to 20 mL of absolute ethanol, stir and dissolve for 2 h, put the sol solution in a crucible, ignite and burn it, and put it in a programmable temperature-controlled furnace at 3 °C / min Calcined at 400°C for 2 h, taken out after natural cooling, and ground to obtain magnetic Fe 2 o 3 / Fe 3 o 4 Nano-heterogeneous particles.

[0021] figure 1 For the magnetic Fe prepared under the conditions described in this example 2 o 3 / Fe 3 o 4 X-ray Diffraction Spectrum of Nanoheterogeneous Particles and Fe 2 o3 Standard PDF Card (JCPDS No. 33-0664) and Fe 3 o 4 Standard PDF card (JCPDS No. 03-0863) comparison chart; it can be seen from the figure that most of the diffraction peak positions of the product and Fe 2 o 3 Corresponding to the diffraction peak position of the standard PDF card, at 30 o and 43 o Fe appears on the diffraction angle 3 o 4 characteristic diffraction peaks, indicating that the Fe 3 o 4 composition; at the same ti...

Embodiment 2

[0026] Add 8.64 g of ferric nitrate to 15 mL of absolute ethanol, stir and dissolve for 2 h, put the sol solution in a crucible, ignite and burn it, and put it in a programmable temperature-controlled furnace until the flame is exhausted. Calcined at 400°C for 0.1 h, taken out after natural cooling, and ground to obtain magnetic Fe 2 o 3 / Fe 3 o 4 Nano-heterogeneous particles.

Embodiment 3

[0028] Add 5.00 g of iron acetate to 50 mL of absolute ethanol, stir and dissolve for 4 h, put the sol solution in a crucible, ignite it, and wait until the fire is exhausted, put it in a programmable temperature-controlled furnace at 7 °C / min Calcined at 150°C for 12 h, taken out after natural cooling, and ground to obtain magnetic Fe 2 o 3 / Fe 3 o 4 Nano-heterogeneous particles.

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Abstract

The invention belongs to the technical field of preparation of inorganic non-metallic nanocomposite materials, and in particular relates to a method for preparing magnetic Fe2O3 / Fe3O4 nano-heterogeneous particles. The invention uses metal iron salt, alcohol and alcohol-soluble organic matter as raw materials, and 1 mol iron The amount of alcohol added is not less than 7 mL, stirred and dissolved to obtain a sol solution, and the sol solution is ignited and burned in the air to obtain a gel. The magnetic Fe2O3 / Fe3O4 nano-heterogeneous particles can be prepared by calcining at ℃ for 0.1-12 h and cooling naturally. The preparation method and process of the present invention are simple and convenient, easy to operate, easy to control the process, wide in source of raw materials, low in cost and environmentally friendly, low in equipment requirements, uniform in product diameter distribution, high in yield, etc., and are convenient for large-scale industrial production. In addition, the microstructure and morphology of the product can be conveniently controlled by adjusting process factors and chemical composition, thereby controlling its performance.

Description

technical field [0001] The invention relates to a magnetic Fe 2 o 3 / Fe 3 o 4 The invention discloses a method for preparing nano-heterogeneous particles, which belongs to the technical field of preparing inorganic non-metallic nano-composite materials. Background technique [0002] As an environmentally friendly magnetic nanomaterial, iron oxide nanomaterials have many unique physical and chemical properties and can exist stably under environmental conditions. These unique properties make them widely used in electrode materials, catalysts, sensors, magnetic resonance imaging and many other fields. Due to its low cost, environmental protection, good biocompatibility, and non-toxic or low-toxic properties in organisms, iron oxide nanomaterials have also been widely used in the field of biomedicine, such as for genes and drugs Delivery vectors, cell isolation, DNA extraction, hyperthermia and more. [0003] The morphology of magnetic iron oxide nanomaterials mainly inclu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G49/06C01G49/08B82Y30/00
Inventor 刘瑞江刘一凡马丽宇傅红霞张业旺陆益民
Owner 江阴智产汇知识产权运营有限公司
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