Method for preparing nanometer alpha-Fe2O3 material

A nanotechnology, seed crystal technology, applied in the fields of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of never involving drying process, high technical requirements for equipment, large capital investment, etc. Solve the effect of not easy to disperse, ensure dispersibility, and reduce consumption

Active Publication Date: 2012-12-26
绍兴奥唯特纳米科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Freeze drying, because of its high technical requirements for equipment and large capital investment, it is difficult for other companies to invent and manufacture
So far, the preparation of nano-α-Fe 2 o 3 Patented method never involved in drying process due to dispersibility index

Method used

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  • Method for preparing nanometer alpha-Fe2O3 material
  • Method for preparing nanometer alpha-Fe2O3 material
  • Method for preparing nanometer alpha-Fe2O3 material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Take refined and purified vitriol (FeSO 4 ·7H 2 O), configured with deionized water to a concentration of 75g / l (converted into FeSO 4 ·7H 2 O) containing Fe 2+ Solution, under 60 ℃, 150r / min stirring speed, add a certain amount of 98% industrial sulfuric acid (the added quality of 98% industrial sulfuric acid is that contains Fe 2+ Solution Fe 2+ 0.015% of the mass), and then add a certain amount (for Fe-containing 2+ Fe in solution 2+ 7.0% by mass) of NaClO 3 reaction, so that Fe 2+ (FeSO 4 ·7H 2 O) completely turned into Fe 3+ (Fe 2 (SO 4 ) 3 ), the Fe 2 (SO 4 ) 3 Add H 2 O is diluted to a solution with a concentration of 35g / l (converted into FeSO4 7H2O), and the mixture of PVP, sodium dodecylbenzenesulfonate, sodium oleate and sodium naphthalenesulfonate is added at 200 rpm and 50°C. Activation, the amount of PVP added is Fe-containing 2+ Fe in solution 2+ 0.1% of the mass, the amount of sodium dodecylbenzenesulfonate added is Fe 2+ Fe in solut...

Embodiment 2

[0056] Take refined and purified vitriol (FeSO 4 ·7H 2 O), configured with deionized water to a concentration of 100g / l (converted into FeSO 4 ·7H 2 O) containing Fe 2+ Solution, under 65 ℃, 150r / min stirring speed, add a certain amount of 98% industrial sulfuric acid (the added quality of 98% industrial sulfuric acid is to contain Fe 2+ Fe in solution 2+ 0.015% of the mass), and then add a certain amount (for Fe-containing 2+ Fe in solution 2+ 7.0% of mass) NaClO 3 Reaction 8 makes Fe 2+ (FeSO 4 ·7H 2 O) completely turned into Fe 3+ (Fe 2 (SO 4 ) 3 ), the Fe 2 (SO 4 ) 3 Add H 2 O is diluted to a solution with a concentration of 50g / l (converted to FeSO4 7H2O), and the mixture of PVP, sodium dodecylbenzenesulfonate, sodium oleate and sodium naphthalenesulfonate is added at 200 rpm and 60°C. Activation, the amount of PVP added is Fe-containing 2+ Fe in solution 2+ 0.3% of the mass, the addition of sodium dodecylbenzenesulfonate is Fe-containing 2+ Fe in sol...

Embodiment 3

[0062] Take refined and purified vitriol (FeSO 4 ·7H 2 O), configured with deionized water to a concentration of 30g / l (converted into FeSO 4 ·7H 2 O) containing Fe 2+ Solution, 55 ℃, 150r / min stirring speed, add a certain amount (for containing Fe 2+ Fe in solution 2+ Quality 0.015%) 98% industrial sulfuric acid, then add a certain amount (for containing Fe 2+ Fe in solution 2+ mass 7.0%) of NaClO 3 reaction, so that Fe 2+ (FeSO 4 ·7H 2 O) completely turned into Fe 3+ (Fe 2 (SO 4 ) 3 ), the Fe 2 (SO 4 ) 3 Add H 2 O is diluted to a solution with a concentration of 50g / l (converted to FeSO4 7H2O), and a mixture of PVP, sodium dodecylbenzenesulfonate, sodium oleate and sodium naphthalenesulfonate is added at 200 rpm and 50°C. Activation, the amount of PVP added is Fe-containing 2+ Fe in solution 2+ 0.2% of the mass, the amount of sodium dodecylbenzenesulfonate added is Fe 2+ Fe in solution 2+ 2% of the mass, the addition of sodium naphthalenesulfonate is Fe...

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Abstract

The invention discloses a method for preparing a nanometer alpha-Fe2O3 material. The method comprises the steps of: (1) adding a strong oxidant in a Fe<2+> solution to oxidize Fe<2+> to Fe<3+>, and adding a strong alkali solution after activation of the Fe<3+> until the pH value is 6.0-11.0 so as to generate a Fe(OH)3 seed crystal colloid; (2) heating the Fe(OH)3 seed crystal colloid to be at 80-90 DEG C, adding the Fe<2+>, the Fe<3+> and Fe<0> in sequence, and reacting at a temperature of 80-90 DEG C for 8-12h to enable the Fe(OH)3 seed crystal colloid to grow to form nanometer alpha-FeOOH, wherein the destination pH value of the reaction is 3.5-6.0; and (3) filtering and washing the nanometer alpha-FeOOH to obtain an alpha-FeOOH filter cake, drying and crushing the alpha-FeOOH filter cake, and then calcining at a temperature of 300-400 DEG C to obtain the nanometer alpha-Fe2O3 powder material. The alpha-Fe2O3 prepared by using the method is small in particle size, good in dispersion, and narrow and even in distribution.

Description

technical field [0001] The invention relates to the field of preparation technology of inorganic compounds, in particular to a method for preparing nano-α-Fe 2 o 3 material method. Background technique [0002] Due to its small size effect, quantum effect, macroscopic quantum tunneling effect, surface and interface effects, etc., nanomaterials are very significantly different from macroscopic particle materials in physical, chemical, and mechanical properties, and have very good properties. It has been more and more widely used in recent years. [0003] Nano α-Fe 2 o 3 It is a spindle-shaped particle with a particle size of less than 0.1nm. It can be widely used in flash coatings, sensors, plastics, leather, and automotive surfaces due to its good weather resistance, light resistance, magnetism, and good absorption and shielding effects on ultraviolet rays. Paint, electronics, high magnetic recording materials and catalysts and other major fields, nano α-Fe 2 o 3 Disp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/06B82Y30/00
Inventor 沈冠华
Owner 绍兴奥唯特纳米科技有限公司
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