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Ferrum oxyhydroxide and ferrum oxide hierarchical nanostructured material, preparation methods and applications thereof

A technology of nanomaterials and iron oxides, which is applied in the field of iron oxyhydroxide and iron oxide hierarchical nanostructure materials and their preparation and application, can solve problems such as application difficulties, and achieve large application prospects, high specific surface area, and good removal The effect of the ability of organic pollutants

Inactive Publication Date: 2013-07-17
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is still very difficult to form complex and regular three-dimensional nanostructures through self-assembly of the above-mentioned low-dimensional structural units and apply them in practice.

Method used

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  • Ferrum oxyhydroxide and ferrum oxide hierarchical nanostructured material, preparation methods and applications thereof
  • Ferrum oxyhydroxide and ferrum oxide hierarchical nanostructured material, preparation methods and applications thereof
  • Ferrum oxyhydroxide and ferrum oxide hierarchical nanostructured material, preparation methods and applications thereof

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preparation example Construction

[0029] The preparation method of iron oxyhydroxides and oxide nanomaterials having a sea urchin-like three-dimensional self-assembled hierarchical structure includes the following steps:

[0030] a) mixing sulfur-saturated alcoholic organic solvent and iron salt aqueous solution, and stirring rapidly to obtain a mixed colloidal suspension of iron salt and sulfur;

[0031] b) at a certain temperature, ultrasonic treatment with a certain power for a period of time to obtain a mixed colloidal dispersion of iron oxyhydroxide and sulfur;

[0032] c) centrifuging the above-mentioned dispersion liquid, and obtaining the iron oxyhydroxide nanomaterial of the present invention after repeated washing and drying;

[0033] d) calcining the above-mentioned iron oxyhydroxide nanomaterial to obtain the iron oxide nanomaterial of the present invention.

[0034] Iron oxides are obtained by calcining iron oxyhydroxides. Specifically, in a muffle furnace, heat from room temperature to 400-450°C...

Embodiment 1

[0039] 2.78 g of ferrous sulfate hexahydrate was dissolved in 50 mL of double distilled water. Add 50 mL of saturated solution of sublimed thioethanol quickly. Sonicate at 70°C for 60 minutes (power 80w). After cooling to room temperature, the sulfur was removed by six times of centrifugal water washing and centrifugal ethanol washing respectively, and dried at 25° C. to obtain α-FeOOH nanomaterials. Then place the obtained α-FeOOH nanomaterials in a muffle furnace, raise the temperature from room temperature to 450°C at a rate of 50°C / min in an air atmosphere, keep the temperature for 4 hours, and cool naturally to obtain red α-Fe 2 o 3 nanomaterials.

[0040] figure 1 The SEM and TEM images of different magnifications representatively represent the as-prepared α-FeOOH nanomaterials. from figure 1 It can be seen from A and 1B that most of the prepared iron oxyhydroxide nanomaterials are urchin-like. Specifically, they are three-dimensional hierarchical nanostructures c...

Embodiment 2

[0042] 5 g of ammonium ferrous sulfate hexahydrate was dissolved in 50 mL of double distilled water. 60 mL of a saturated solution of settled thioethanol was quickly added thereto. Sonicate at 60°C for 20 minutes (power 90w). After cooling to room temperature, the sulfur was removed by six times of centrifugal washing with water and centrifugal ethanol, and dried at 30° C. to obtain α-FeOOH nanomaterials. Then the obtained α-FeOOH nanomaterials were placed in a muffle furnace, and the temperature was raised from room temperature to 400°C at a rate of 45°C / min in an air atmosphere. After 6 hours of heat preservation, the red α-Fe 2 o 3 nanomaterials. Its morphology features are similar to the iron oxyhydroxide and iron oxide nanomaterials in Example 1, respectively.

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Abstract

The invention discloses a ferrum oxyhydroxide nano material and a ferrum oxide nano material, and preparation methods and applications thereof. The ferrum oxyhydroxide nano material and the ferrum oxide hierarchical nano material are respectively alpha-FeOOH and alpha-Fe2O3, and have a sea urchin-shaped self-assembly hierarchical nanostructure. The preparation methods comprise the steps of 1) mixing an alcoholic solvent saturated solution of sulphur with an aqueous solution of a ferrous salt and stirring to obtain a mixed colloidal particle turbid liquid of the sulphur and the ferrous salt; 2) subjecting the mixed colloidal particle turbid liquid to ultrasonic treatment to obtain a mixed colloidal particle dispersion liquid of the ferrum oxyhydroxide and the sulphur; 3) centrifuging the dispersion liquid, collecting precipitate, washing to remove the sulphur and drying, thus obtaining the ferrum oxyhydroxide nano material; and 4) calcining the ferrum oxyhydroxide nano material to obtain the ferrum oxide nano material. The ferrum oxyhydroxide nano material and the ferrum oxide nano material provided by the invention can be used in environmental treatment for removing organic pollutants from water.

Description

technical field [0001] The invention relates to a hierarchical nanostructure material of iron oxyhydroxide and iron oxide, a preparation method and application thereof. Background technique [0002] Compared with zero-dimensional, one-dimensional and two-dimensional nanostructured materials, the special physical and chemical properties of three-dimensional nanostructured materials have aroused strong research interest, and their preparation methods have also attracted increasing attention. The most effective way to prepare three-dimensional nanostructures is self-assembly technology. However, it remains a great challenge to develop economical, stable, and reliable self-assembly methods for large-scale preparation of 3D hierarchical nanostructures with controllable composition and morphology. [0003] Iron oxyhydroxide and oxide nanomaterials have been widely studied in the fields of sensors, magnetic storage, environmental protection, catalysis, and clinical diagnosis and t...

Claims

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Application Information

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IPC IPC(8): C01G49/02C01G49/06B82Y40/00C02F1/28
Inventor 李峻柏费进波
Owner INST OF CHEM CHINESE ACAD OF SCI
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