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Method for preparing magnetite Fe3O4 nano particles material

A nanoparticle and magnetite technology, applied in the field of magnetic nanoparticle synthesis, can solve the problems of low production cost and achieve the effects of simple operation, easy availability of raw materials, and high yield

Inactive Publication Date: 2009-08-05
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in all these technologies, the uniform and adjustable size distribution of the preparation, low production cost, environmental friendliness and mass production cannot meet the requirements, and it needs to be solved urgently.

Method used

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  • Method for preparing magnetite Fe3O4 nano particles material
  • Method for preparing magnetite Fe3O4 nano particles material
  • Method for preparing magnetite Fe3O4 nano particles material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1, 4nm Fe 3 o 4 Particle Preparation.

[0023] 1.8g FeCl 3 Dissolve 7.7g of glucose in 100g of water heated in a water bath at 60°C, stir for 2 hours, adjust the pH value to 11 with ammonia water, the color of the solution turns dark brown, transfer it to a polytetrafluoroethylene-lined autoclave, and crystallize with water at 110°C for 6 hours , cooled to room temperature, opened the kettle and centrifuged and washed four times with water to completely remove impurities to obtain black magnetite nanoparticles. Re-dispersed in water, magnetite nano-dispersion can be prepared.

Embodiment 2

[0024] Example 2, 9nm Fe 3 o 4 Particle Preparation.

[0025] 8.86g Fe 2 (SO4) 3 Dissolve 6.65g of glucose in 100g of water heated in a water bath at 60°C, stir for 1h, adjust the pH value to 10 with ammonia water, the color of the solution turns dark brown, transfer it to a polytetrafluoroethylene-lined autoclave, and conduct hydrothermal crystallization at 130°C for 8h , cooled to room temperature, opened the kettle and centrifuged and washed four times with water to completely remove impurities to obtain black magnetite nanoparticles. Magnetite nano-dispersion can be prepared by redispersing in chlorinated solvent.

Embodiment 3

[0026] Example 3, 12nm Fe 3 o 4 Particle Preparation.

[0027] 3.6 g FeCl 3 Dissolve 13.3g sucrose in 100g water heated in a water bath at 60°C, stir for 0.5h, adjust the pH value to 10 with ammonia water, the color of the solution turns dark brown, transfer it to a polytetrafluoroethylene-lined autoclave, and crystallize with 150°C hydrothermal After 12 hours, cool down to room temperature, open the kettle and wash four times with water or DMF centrifuge to completely remove impurities to obtain black magnetite nanoparticles. Magnetite nanodispersions can be prepared by redispersing in aromatic solvents.

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Abstract

A method for preparing magnetite Fe3O4 nano particle material. The method comprises the steps of adding sugars and iron salts into water and mixing them in liquid phase, adjusting the pH value with alkali, and crystallizing the mixture at 100 DEG C to 300 DEG C in a hydrothermal state to prepare magnetite (Fe3O4) nanoparticles. The particle size can be controlled by changing the ratio of sugar to iron salt, changing the pH value of the solution, crystallization temperature or crystallization time. Magnetite nanoparticles with narrow size distribution in the range of 4nm to 18nm in size are prepared by using the present invention. The method of the invention has the characteristics of simple operation, no inert gas protection, high yield, easily available raw materials and environmental friendliness.

Description

【Technical field】 [0001] The invention belongs to the field of synthesis of magnetic nanoparticles. More specifically, it concerns the size-controlled synthesis of iron-based nanoparticles, especially magnetite nanoparticle materials, which have many important technical applications. 【Background technique】 [0002] Magnetite (Fe 3 o 4 ) are three common iron oxides with many important applications FeO, Fe 2 o 3 , Fe 3 o 4 One of them, due to its uniform and tunable magnetic properties, Fe 3 o 4 It has wide application value in the field of magnetic materials. Dispersions of magnetic iron oxide nanoparticles known as "ferrofluids" on the market have been widely used, for example, in the sealing of rotating shafts in vacuum vessels, vibration damping in electronic instruments, avionics, robotics, position sensing in machine tools and drive systems, etc. field. Magnetite is a typical semi-metallized material, and its black particle dispersion has been used in the prin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G49/08
Inventor 关乃佳孙晓红郑春明章福祥杨雅莉李兰冬
Owner NANKAI UNIV