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A preparation method of ordered mesoporous iron oxyhydroxide nanorods

An iron oxide nanometer, mesoporous hydroxyl technology, applied in the direction of iron oxide/iron hydroxide, etc., can solve the problems of complex crystal phase, skeleton collapse, affecting the order degree of mesopores, etc. Inexpensive and readily available effects

Active Publication Date: 2020-07-31
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen from the above prior art that the soft template method can synthesize mesoporous iron oxide materials with templates, but iron oxides have complex crystal phases, and various iron oxyhydroxides are easily formed during the synthesis of nanomaterials. Simultaneously, templates, reaction conditions and The process and other factors greatly affect the mesoporous order of nanomaterials, and the skeleton collapses easily during the crystallization process. All of the above bring greater difficulty to the controllable preparation of ordered mesoporous iron oxyhydroxide nanostructures with uniform morphology. and challenges

Method used

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  • A preparation method of ordered mesoporous iron oxyhydroxide nanorods
  • A preparation method of ordered mesoporous iron oxyhydroxide nanorods
  • A preparation method of ordered mesoporous iron oxyhydroxide nanorods

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Effect test

Embodiment 1

[0035] (1) Dissolve 0.5g of non-ionic block copolymer surfactant in 35mL of distilled water, add anhydrous ferric chloride, stir and disperse fully to obtain a yellow solution.

[0036] (2) While stirring the yellow solution, 0.5 g of urea precipitation agent was added dropwise at a rate of 1.5 mL / min, and stirred at a constant temperature of 30 ° C for 12 h to obtain a precursor solution.

[0037] (3) Transfer the precursor solution to a reaction kettle with a polytetrafluoroethylene liner, conduct a hydrothermal reaction at 80°C, and centrifuge to collect the precipitate. After the precipitate is fully washed with ethanol and water, it is vacuum-dried overnight at 100°C. , to obtain solid powder.

[0038] (4) Transfer the solid powder to a crucible, and in an inert atmosphere, start from room temperature at a rate of 5 °C / min to 150 °C, keep the temperature for 2.5 h, and cool down naturally to obtain ordered mesoporous iron oxyhydroxide nanorods.

Embodiment 2

[0040](1) Dissolve 2 g of the nonionic block copolymer surfactant PEOPPOPEO in 80 mL of distilled water, add ferric nitrate, stir and disperse fully to obtain a yellow solution.

[0041] (2) While stirring the yellow solution, 2 g of urea precipitation agent was added dropwise at a rate of 3 mL / min, and stirred at a constant temperature of 60 °C for 48 h to obtain a precursor solution.

[0042] (3) Transfer the precursor solution to a reaction kettle with a polytetrafluoroethylene liner, react hydrothermally at 120°C, centrifuge to collect the precipitate, wash the precipitate fully with ethanol and / or water, and vacuum at 100°C Dry overnight to obtain a solid powder.

[0043] (4) Transfer the solid powder into a crucible, and in an inert atmosphere, start from room temperature at a rate of 5 °C / min to 250 °C, keep it warm for 2.5 h, and cool down naturally to obtain ordered mesoporous iron oxyhydroxide nanorods.

Embodiment 3

[0045] (1) Dissolve 1 g of non-ionic block copolymer surfactant in 45 mL of distilled water, add hydrous ferric chloride, stir and disperse fully to obtain a yellow solution.

[0046] (2) While stirring the yellow solution, 1.5 g of urea precipitation agent was added dropwise at a rate of 2 mL / min, and stirred at a constant temperature of 40 °C for 24 h to obtain a precursor solution.

[0047] (3) Transfer the precursor solution to a reaction kettle with a polytetrafluoroethylene liner, conduct a hydrothermal reaction at 120°C, centrifuge to collect the precipitate, wash the precipitate with ethanol or water, and dry it under vacuum at 100°C overnight , to obtain solid powder.

[0048] (4) Transfer the solid powder to a crucible, and in an inert atmosphere, start from room temperature at a rate of 5 °C / min to 200 °C, keep it warm for 2.5 h, and cool down naturally to obtain ordered mesoporous iron oxyhydroxide nanorods.

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Abstract

The invention provides a preparation method of an ordered mesoporous hydroxyl-ferric oxide nanorod, comprising the following steps of dissolving a nonionic block copolymer into distilled water, addinga ferric salt precursor, fully stirring and dispersing to obtain a yellow solution, then dropwise adding a urea precipitant in the yellow solution while stirring, performing heat preservation and stirring within the temperature range of 30 to 60 DEG C so as to obtain a precursor solution; transferring the precursor solution into a polytetrafluoroethylene liner reaction still, performing hydrothermal reaction at 80 to 150 DEG C, centrifuging to take precipitate, fully washing the precipitate, and performing vacuum drying overnight at 100 DEG C to obtain solid powder; transferring the solid powder into a crucible, under the inert atmosphere, heating to a preset temperature interval for heat preservation, and naturally cooling to obtain the ordered mesoporous hydroxyl-ferric oxide nanorod. According to the method provided by the invention, the adopted raw materials are less in type, low in cost and easy to obtain, the preparation method is simple and effective, and the synthesis conditions are mild and controllable; through regulating the reaction temperature and the technological process, the preparation of the ordered mesoporous hydroxyl-ferric oxide nanorod is controllable.

Description

technical field [0001] The invention belongs to the technical field of iron oxide nanomaterials, and in particular relates to a method for preparing ordered mesoporous iron oxyhydroxide nanorods. Background technique [0002] From soil, sediments to animals and plants, there are shadows of iron everywhere in nature, so iron and its derivatives come from a wide range of sources. With the rapid development of human society, iron oxide has good weather resistance, light resistance and UV protection. With good absorption and shielding effects, it has a wide range of applications in magnetic storage, catalysis, biomedical engineering, gas-sensitive materials, lithium batteries, adsorption, dyes and other fields. [0003] With the continuous development of science and technology, we have further in-depth understanding of the microcosm of materials, and have discovered iron oxide nanoparticles, iron oxide nanorods, iron oxide nanotubes, iron oxide nanosheets and other nano-iron oxi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G49/02
CPCC01G49/02C01P2004/04C01P2004/16C01P2004/64C01P2006/17
Inventor 丁世磊蔡佳佳牛司平徐俊超朱宝忠
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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