Method for controllably preparing hydroxyl oxidize iron, iron sesquioxide and ferroferric oxide

A technology of iron oxyhydroxide and ferrous salt, which is applied in the direction of iron oxide/iron hydroxide, iron oxide, ferrous oxide, etc., to achieve the effects of cost reduction, low energy consumption, and green and safe reaction environment

Active Publication Date: 2011-08-17
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there have been many reports on the use of nanomaterials such as nanosorbents, nanocatalysts, and biologically active nanoparticles for sewage treatment and catalytic reactions.

Method used

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  • Method for controllably preparing hydroxyl oxidize iron, iron sesquioxide and ferroferric oxide
  • Method for controllably preparing hydroxyl oxidize iron, iron sesquioxide and ferroferric oxide
  • Method for controllably preparing hydroxyl oxidize iron, iron sesquioxide and ferroferric oxide

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Experimental program
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Effect test

Embodiment 1

[0032] Embodiment 1: Preparation of sea urchin-shaped iron oxyhydroxide, ferric oxide, ferric oxide

[0033] Weigh 10g FeSO 4 ·7H 2 Dissolve O in 100mL deionized water, stir to dissolve completely, then add 10mL ethylene glycol to it, and continue stirring for 20min to make the mixture even. The reaction solution was placed in an oil bath at 100°C for 2 hours and then stopped heating; after the precipitate was cooled to room temperature, the obtained precipitate was centrifuged and washed 3 times with deionized water, dried at 50°C for 2 hours to obtain sea urchin-shaped iron oxyhydroxide α-FeOOH.

[0034] The obtained sea urchin-shaped iron oxyhydroxide α-FeOOH was heated from room temperature to 350°C in a muffle furnace at a heating rate of 5°C / min and calcined for 3 hours to obtain sea urchin-shaped α-FeOOH 2 o 3 ;

[0035] Mix the obtained sea urchin-shaped iron oxyhydroxide α-FeOOH with ferrous salt (ferrous sulfate heptahydrate) at a molar ratio of 2:1, and react at...

Embodiment 2

[0037] Example 2: Preparation of three-dimensional ordered arrays of iron oxyhydroxide, ferric oxide, and ferric oxide

[0038] Weigh 30g FeSO 4 ·7H 2 Dissolve O in 100mL of deionized water, stir to dissolve completely, then add 10mL of ethylene glycol to it, and continue to stir for 20min to make the mixture even. The reaction solution was placed in an oil bath at 100°C for 2 hours and then stopped heating. After the precipitate was cooled to room temperature, the obtained precipitate was centrifuged and washed 3 times with deionized water, and dried at 50°C for 2 hours to obtain a three-dimensional ordered array of iron oxyhydroxide α-FeOOH .

[0039] The obtained iron oxyhydroxide α-FeOOH three-dimensional ordered array was heated from room temperature to 350°C in a muffle furnace at a heating rate of 5°C / min and calcined for 3h to obtain α-Fe 2 o 3 three-dimensional ordered array;

[0040] Mix the obtained iron oxyhydroxide α-FeOOH three-dimensional ordered array with...

Embodiment 3

[0042] Embodiment 3: Preparation of rod-shaped iron oxyhydroxide, ferric oxide, ferric oxide

[0043] Weigh 20g FeSO 4 ·7H 2 Dissolve O in 100mL deionized water, stir to dissolve completely, then add 10mL ethylene glycol to it, and continue stirring for 20min to make the mixture even. The reaction solution was placed in an oil bath at 120°C for 2 hours, and then the heating was stopped; after the precipitate was cooled to room temperature, the obtained precipitate was centrifuged and washed 3 times with deionized water, and dried at 50°C for 2 hours to obtain rod-shaped iron oxyhydroxide α-FeOOH.

[0044] The obtained rod-shaped iron oxyhydroxide α-FeOOH was heated from room temperature to 300°C in a muffle furnace at a heating rate of 5°C / min and calcined for 3 hours to obtain rod-shaped α-Fe 2 o 3 ;

[0045] Mix the obtained rod-shaped iron oxyhydroxide α-FeOOH with ferrous salt (ferrous sulfate heptahydrate) at a molar ratio of 2:1, and react at 100°C for 1 h at a pH va...

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Abstract

The invention discloses a method for controllably preparing hydroxyl oxidize iron, iron sesquioxide and ferroferric oxide. The method comprises the following steps of: dissolving ferrous salt into water to obtain aqueous solution of ferrous salt; then adding alcohol into the aqueous solution of ferrous salt and uniformly mixing the mixture to perform a reaction; after the reaction is completed, drying to obtain the hydroxyl oxidize iron; sintering the obtained hydroxyl oxidize iron in a muffle furnace to obtain the iron sesquioxide; and under the condition of a pH value of 8 to 14, performing a reaction of the hydroxyl oxidize iron and ferrous salt and obtaining Fe3O4 after the reaction is completed. The method is green and environmental-friendly, is simple to operate and is easy for industrial production. Meanwhile, the prepared materials have large specific surface areas and stable structures, can be used as excellent water treatment materials and can also be used as a catalyst for an excellent catalytic reaction.

Description

technical field [0001] The invention relates to a method for controllably preparing ferric oxyhydroxide, ferric oxide and ferric oxide. Background technique [0002] At present, the environmental problem is urgent, and it directly threatens the sustainable development of human beings. Severe environmental problems call for the advent of green chemistry, and nanotechnology has brought great hope for the development of green chemistry and the solution of environmental problems. Many nanomaterials have also been successfully applied in the field of environmental protection. where Fe 2 o 3 , MnO 2 ,TiO 2 , CeO 2 Such substances have been applied to water treatment one after another. However, looking at the above substances, only iron-based active substances have the lowest application cost and are not biologically toxic. Iron oxyhydroxide widely exists in nature, and because of its stable structure and abundant hydroxyl groups, it has great application potential in water t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/02C01G49/06C01G49/08B82Y40/00
Inventor 王春儒李慧舒春英蒋礼
Owner INST OF CHEM CHINESE ACAD OF SCI
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