Preparation method of nanometer alpha-Fe2O3

A -fe2o3, nanotechnology, applied in the field of preparation of nano-α-Fe2O3, can solve the problems of low particle dispersion, easy agglomeration, large crystal grains, etc., to improve the reactivity and selectivity, suitable particle size, uniform distribution Effect

Inactive Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] From the above patent analysis, it can be seen that how to solve the problem of nano-α-Fe 2 o 3 In the preparation process, there are problems such as low particle dispersion, large crystal grains, and easy agglomeration. Nano α-Fe 2 o 3 The focus of research on

Method used

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  • Preparation method of nanometer alpha-Fe2O3
  • Preparation method of nanometer alpha-Fe2O3

Examples

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Embodiment 1

[0025] Take 50g concentration of 10% Fe(NO 3 ) 3 solution, add 0.5 g of the active substance cetyltrimethylammonium bromide, after ultrasonic dissolution, add 10% NaOH solution under magnetic stirring and adjust the pH=7, then heat and boil under reflux for 4 hours, liquid-solid separation at 120°C for 5 hours, get nano α-Fe 2 o 3 .

Embodiment 2

[0027] Take 50g concentration of 10% Fe(NO 3 )3 Solution, add active substance polyethylene glycol 6000 1.0g and stir to dissolve, add 15% NaOH solution under magnetic stirring and adjust PH=8, then heat and boil for reflux for 5 hours, and separate liquid and solid at 140°C for 7 hours to obtain nano-α-Fe 2 o 3 .

Embodiment 3

[0029] Take 50g concentration of 10% Fe(NO 3 ) 3 Solution, add 1.5g of active substance polyethylene glycol 6000 statically mix and dissolve, add 20% NaOH solution under magnetic stirring and adjust PH = 9, then heat and boil for 6 hours, liquid-solid separation at 160°C for 9 hours to obtain nano-α- Fe 2 o 3 .

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Abstract

The invention discloses a preparation method of nanometer alpha-Fe2O3, and belongs to the technical field of chemical industry. The method is characterized in that an active substance is added to 50g of a Fe(NO3)3 solution with the concentration of 10%, and is mixed and dissolved, an alkaline solution is added, the obtained mixture is heated and refluxed, and the obtained material undergoes liquid-solid separation to obtain the nanometer alpha-Fe2O3. The method concretely comprises the following steps: adding a certain amount of the active substance to 50g of the Fe(NO3)3 solution with the concentration of 10%, fully mixing and dissolving the active substance in the Fe(NO3)3 solution, adding the alkaline solution with a certain concentration to adjust the pH value to a value in a certain range, carrying out heating boiling refluxing for a certain time, and carrying out liquid-solid separation at a certain temperature for a certain time to obtain the nanometer alpha-Fe2O3. The average particle size of the obtained alpha-Fe2O3 is 2-5nm; and an electron scanning microscopy result shows that the alpha-Fe2O3 prepared through the method has suitable grain size and uniform distribution.

Description

technical field [0001] The invention belongs to the technical field of chemical industry and proposes a nano-α-Fe 2 o 3 method of preparation. Background technique [0002] Nano α-Fe 2 o 3 With magnetism and good hardness, it can be used as magnetic material and magnetic recording material; nano-α-Fe 2 o 3 With good weather resistance, light resistance and chemical stability, it is an important inorganic pigment and fine ceramic raw material; nano α-Fe 2 o 3 It has a huge specific surface area and significant surface effect, and is a good catalyst; nano-α-Fe 2 o 3 It has semiconductor characteristics, and its conductivity is sensitive to temperature, humidity and gas. It is a sensitive material with development potential. In conclusion, nano-α-Fe 2 o 3 It has extensive application value and development prospects in magnetic recording materials, fine ceramics, plastic products, coatings, catalysts and biomedical engineering. [0003] Currently, α-Fe 2 o 3 The p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/06B82Y40/00
Inventor 孙盛凯金汉强李玉杰丁红霞杨忠林
Owner CHINA PETROLEUM & CHEM CORP
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