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Ferrous carbonate hexahedron and preparation method thereof

A ferrous carbonate and hexahedral technology, which is applied in the field of materials to achieve the effects of simple reaction process, high crystallinity and short reaction time

Inactive Publication Date: 2015-04-29
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, polyhedral ferrous carbonate and how to obtain polyhedral ferrous carbonate are seldom reported

Method used

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  • Ferrous carbonate hexahedron and preparation method thereof
  • Ferrous carbonate hexahedron and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1 of the present invention proposes a kind of preparation method of ferrous carbonate hexahedron, comprises the steps:

[0020] S1. Dissolve 3 mmol of ferrous chloride tetrahydrate and 10 mmol of urea in 50 mL of deionized water, and obtain a uniform solution under stirring with a magnetic stirrer;

[0021] S2. Add the uniformly stirred solution in S1 into a polytetrafluoroethylene autoclave liner with a volume of 70 mL, then put the autoclave into an oven, heat to 160° C., and keep it warm for 10 hours;

[0022] S3, after the autoclave is naturally cooled to room temperature, the reaction product is taken out, the reaction product is repeatedly washed with deionized water and absolute ethanol until the aqueous solution is neutral, and then centrifuged to obtain a precipitate and the precipitate is dried in an oven to obtain sulfite Iron hexahedral powder.

Embodiment 2

[0024] Embodiment 2 of the present invention proposes a kind of preparation method of ferrous carbonate hexahedron, comprises the steps:

[0025] S1. Dissolve 2.5mmol of ferrous chloride tetrahydrate and 8mmol of urea in 48mL of deionized water, and obtain a uniform solution under stirring with a magnetic stirrer;

[0026] S2. Add the uniformly stirred solution in S1 into a polytetrafluoroethylene autoclave liner with a volume of 70 mL, then put the autoclave into an oven, heat to 170° C., and keep it warm for 8 hours;

[0027] S3, after the autoclave is naturally cooled to room temperature, the reaction product is taken out, the reaction product is repeatedly washed with deionized water and absolute ethanol until the aqueous solution is neutral, and then centrifuged to obtain a precipitate and the precipitate is dried in an oven to obtain sulfite Iron hexahedral powder.

Embodiment 3

[0029] Embodiment 3 of the present invention proposes a kind of preparation method of ferrous carbonate hexahedron, comprises the steps:

[0030] S1. Dissolve 4 mmol of ferrous chloride tetrahydrate and 14 mmol of urea in 54 mL of deionized water, and obtain a uniform solution under stirring with a magnetic stirrer;

[0031] S2. Add the uniformly stirred solution in S1 into a polytetrafluoroethylene autoclave liner with a volume of 70mL, then put the autoclave into an oven, heat to 150°C, and keep it warm for 15 hours;

[0032] S3, after the autoclave is naturally cooled to room temperature, the reaction product is taken out, the reaction product is repeatedly washed with deionized water and absolute ethanol until the aqueous solution is neutral, and then centrifuged to obtain a precipitate and the precipitate is dried in an oven to obtain sulfite Iron hexahedral powder.

[0033] SEM observation and XRD analysis were carried out on the ferrous carbonate hexahedron prepared ac...

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Abstract

The invention discloses a ferrous carbonate hexahedron and a preparation method thereof. The ferrous carbonate hexahedron is a FeCO3-phase hexahedron crystal structure, wherein the side length of the ferrous carbonate hexahedron is 500-5000nm. The preparation method comprises the following steps: uniformly stirring ferrous chloride tetrahydrate, urea and deionized water in a mole ratio of (1-5):(3-15):(2000-3000); adding the uniform solution into a high-pressure autoclave, putting the high-pressure autoclave into a drying oven, heating to 120-180 DEG C, and keeping the temperature for 3-18 hours; and naturally cooling the high-pressure autoclave to room temperature, taking out the reaction product, repeatedly washing the reaction product with deionized water and anhydrous ethanol until the water solution is neutral, centrifugating to obtain a precipitate, and drying the precipitate in a drying oven to obtain the ferrous carbonate hexahedron powder. The method does not need to add any dispersing agent or surfactant; the prepared ferrous carbonate hexahedron has high crystallinity; and the preparation process has the advantages of convenient after-treatment, low reaction temperature, short reaction time, simple reaction technique and low cost.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a ferrous carbonate hexahedron and a preparation method thereof. Background technique [0002] Ferrous carbonate, the molecular formula is FeCO 3 , belongs to the trigonal crystal system, and the crystal structure belongs to the rhombohedral structure. Due to its unique crystal structure, it has always been the preferred choice for preparing Fe 3 o 4 and Fe 2 o 3 Research hotspots of precursors. In recent years, the synthetic method of ferrous carbonate with different appearances has been reported in the literature, such as by mixing reducing agent such as ascorbic acid, urea and ferric chloride, and then obtaining ferrous carbonate ellipsoidal structure by hydrothermal method; if in the above system Further introducing the surfactant polyvinylpyrrolidone into the ferrous carbonate ball with a smooth surface can be obtained. In the prior art, polyhedral ferrous carbonate ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/00
Inventor 刘岗陈林王化田兴友
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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