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A kind of preparation method of α-Fe2O3 magnetic nanorod

A magnetic nanorod, -fe2o3 technology, applied in the direction of iron oxide, iron oxide/iron hydroxide, etc., can solve the problems of restricting large-scale industrial production of magnetic nanorods, extremely harsh temperature and other conditions, and high cost of traditional processes. The structure is uniform and controllable, the process is simple and easy to control, and the effect of low equipment requirements

Active Publication Date: 2018-12-14
江阴智产汇知识产权运营有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] α-Fe 2 o 3 Magnetic nanorod preparation methods mainly include template method, hydrothermal method, uniform co-precipitation method, sol-gel method, microemulsion, etc., but these traditional preparation methods are cumbersome, often use special raw materials, and have a long production cycle , some are only suitable for a small amount of preparation in the laboratory, and some even have extremely strict requirements on temperature and other conditions, which largely limit the α-Fe 2 o 3 Large-scale industrial production of magnetic nanorods
[0004] For the current α-Fe 2 o 3 Due to the limitations of large-scale industrial production of magnetic nanorods, as well as the high cost of traditional processes, special requirements for raw materials, and long production cycles, the present invention has developed a new method for preparing α-Fe 2 o 3 A Magnetic Nanorod Approach for α-Fe 2 o 3 Large-scale industrial production of magnetic nanorods provides new process routes and manipulation techniques

Method used

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  • A kind of preparation method of α-Fe2O3 magnetic nanorod
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  • A kind of preparation method of α-Fe2O3 magnetic nanorod

Examples

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Effect test

Embodiment 1

[0020] Example 1: α-Fe 2 o 3 Preparation of Magnetic Nanorods

[0021] Prepare FeCl with a concentration of 1.6 mol / L 3 Solution, accurately transfer 50 mL to a 250 mL Erlenmeyer flask, according to urea and Fe 3+ Accurately weigh urea with a molar ratio of 4:1 and add it into a 250 mL Erlenmeyer flask, stir to dissolve, heat the solution to 85°C, and stir for 4 h. After centrifugation, the precipitate was washed 5 times with distilled water. After centrifugation, the precipitate was placed in a drying oven, and the precursor was obtained after drying. Grind the precursor, put it into a temperature-programmed resistance furnace for calcination at 400 °C for 4 h, and cool naturally to obtain α-Fe 2 o 3 magnetic nanorods.

[0022] figure 1 α-Fe prepared for this example 2 o 3 The scanning electron micrograph of the magnetic nanorod can be seen from the electron micrograph that the prepared product is rod-shaped, with uniform appearance and good dispersion. Its rods hav...

Embodiment 2

[0025] Example 2: α-Fe 2 o 3 Preparation of Magnetic Nanorods

[0026] Fe(NO 3 ) 3 Solution, accurately transfer 50 mL to a 250 mL Erlenmeyer flask, according to urea and Fe 3+ The molar ratio of urea is 1:1, and the urea is accurately weighed and added to a 250 mL Erlenmeyer flask, stirred to dissolve, the solution is heated to 70°C, and stirred for 6 h. After centrifugation, the precipitate was washed 5 times with distilled water. After centrifugation, the precipitate was placed in a drying oven, and the precursor was obtained after drying. The precursor was ground, put into a temperature-programmed resistance furnace for calcination at 500 °C for 2 h, and cooled naturally to obtain α-Fe 2 o 3 Magnetic nanorods with a saturation magnetization of 0.45 emu / g.

Embodiment 3

[0027] Example 3: α-Fe 2 o 3 Preparation of Magnetic Nanorods

[0028] Prepare FeCl with a concentration of 0.5 mol / L 3 Solution, accurately transfer 50 mL to a 250 mL Erlenmeyer flask, according to urea and Fe 3+ Accurately weigh urea with a molar ratio of 3:1 and add it to a 250 mL Erlenmeyer flask, stir to dissolve, raise the temperature of the solution to 80°C, and stir for 3 h. After centrifugation, the precipitate was washed 5 times with distilled water. After centrifugation, the precipitate was placed in a drying oven, and the precursor was obtained after drying. Grind the precursor, put it into a temperature-programmed resistance furnace for calcination at 600 °C for 1 h, and cool naturally to obtain α-Fe 2 o 3 Magnetic nanorods with a saturation magnetization of 0.39 emu / g.

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Abstract

The invention belongs to the technical field of preparation of an inorganic non-metal nanomaterial and in particular relates to a preparation method of an alpha-Fe2O3 magnetic nano-rod. The preparation method takes inorganic iron salt and urea as raw materials and comprises the following steps: dissolving Fe<3+> and the urea into water according to the mol ratio of no more than 4 to 1; controlling the concentration of the Fe<3+> to be 0.5mol / L to 3.0mol / L and stirring; raising the temperature to 70 DEG C to 85 DEG C and reacting; after reacting, centrifuging and separating; washing with distilled water and precipitating; drying sediment and grinding; putting the sediment into a program temprature controlling resistor furnace and calcining at 400 DEG C to 600 DEG C to obtain the alpha-Fe2O3 magnetic nano-rod. The preparation method provided by the invention is simple in process, simple and convenient to operate, low in cost and low in equipment requirements; a product has uniform structure and shape and stable performances.

Description

technical field [0001] The present invention relates to a kind of α-Fe 2 o 3 The invention discloses a method for preparing magnetic nanorods, which belongs to the technical field of preparation of inorganic nonmetallic nanometer materials. Background technique [0002] α-Fe 2 o 3 It is an environmentally friendly n-type semiconductor with strong light absorption properties in the visible wavelength range, coupled with the advantages of low preparation cost and good chemical stability, it has been widely used in photocatalysis, photochromism, gas sensors and fields of photoelectrochemistry. α-Fe 2 o 3 In addition to the above characteristics, magnetic nanorods also have the unique characteristics of one-dimensional and quasi-one-dimensional nanomaterials such as shape anisotropy, which are expected to be applied in magnetic fluids, biomedicine, drug loading, surface functionalization, etc., so α-Fe 2 o 3 The preparation technology of magnetic nanorods has become one ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G49/06
CPCC01G49/06C01P2002/72C01P2004/03C01P2004/16C01P2004/62C01P2006/42
Inventor 刘瑞江刘树信王明齐傅红霞于庆梅刘逍
Owner 江阴智产汇知识产权运营有限公司
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