A kind of preparation method of hollow co-fe LDH material

A hollow, fe-mofs technology, applied in chemical instruments and methods, cobalt compounds, inorganic chemistry, etc., to achieve the effect of good catalysis, good application prospects, and multiple electrochemical active sites

Active Publication Date: 2022-08-02
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the synthesis of LDHs with non-spherical hollow structures remains a challenge, and the choice of template is still limited by the template composition or shape.

Method used

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  • A kind of preparation method of hollow co-fe LDH material
  • A kind of preparation method of hollow co-fe LDH material
  • A kind of preparation method of hollow co-fe LDH material

Examples

Experimental program
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Effect test

Embodiment 1

[0027] A preparation method of a hollow Co-Fe LDH material, comprising the following steps:

[0028] Step 1. Stir and mix the iron source, fumaric acid and N,N-dimethylformamide solution to obtain a mixed solution; transfer the mixed solution to an autoclave, heat up to 80~100°C, and react for 2~5 h, cooled to room temperature, centrifuged to collect the precipitate to obtain Fe-MOFs material;

[0029] In step 2, the Fe-MOFs obtained in step 1 are fully washed with DMF solution, and dried at a temperature of 75-85 °C for 12-24 h, for use;

[0030] Step 3, ultrasonically dispersing the Fe-MOFs material obtained in step 2 in absolute ethanol to obtain solution A, dissolving cobalt source and urea with a molar ratio of 2~3:1 in deionized water to obtain solution B. Mix A and solution B evenly, transfer to a sealed container, heat in a water bath and cool to room temperature, wash the obtained precipitate with deionized water and absolute ethanol, and dry it at a temperature of 5...

Embodiment 2

[0038] A preparation method of a hollow Co-Fe LDH material, comprising the following steps:

[0039] Step 1, preparing the precursor Fe-MOFs material by solvothermal method, the specific steps are as follows: stirring and mixing iron source, fumaric acid and N,N-dimethylformamide solution, iron source and fumaric acid The molar ratio of acid is 3:4~5 to obtain a mixed solution; the mixed solution is transferred to an autoclave, heated to 100 °C, reacted for 3 h, cooled to room temperature, centrifuged, and the precipitate is collected to obtain Fe-MOFs material;

[0040] In step 2, the Fe-MOFs obtained in step 1 are fully washed with DMF solution, and dried for 12 h at a temperature of 70-80 °C, for use;

[0041] Step 3, ultrasonically dispersing the Fe-MOFs material obtained in step 2 in absolute ethanol to obtain solution A, dissolving cobalt source and urea with a molar ratio of 2~3:1 in deionized water to obtain solution B. Mix A and solution B evenly, and the mass ratio ...

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Abstract

The invention provides a preparation method of a hollow-structure Co-Fe LDH material, comprising the following steps: step 1, preparing a precursor Fe-MOFs material by a solvothermal method, and then drying the prepared Fe-MOFs material; step 2, Disperse the Fe-MOFs material in anhydrous ethanol solution, dissolve the cobalt source and urea in deionized water, mix the two solutions, and heat in a water bath for a certain period of time to obtain the Co-Fe LDH material; the hollow structure Co-Fe of the present invention The preparation method of LDH material, the obtained hollow Co-Fe LDH particles have complete morphology and uniform particle size, and have good application prospects in the field of catalysis and energy storage materials. The preparation method of the invention is mature and easy to operate, and the process is stable It has good performance, low cost, and has a good foundation for popularization and application.

Description

technical field [0001] The invention relates to a preparation method of cobalt iron double hydroxide (Co-Fe LDH), in particular to a preparation method of a hollow Co-FeLDH material. Background technique [0002] Layered double hydroxides (LDHs) are a class of inorganic layered materials composed of hydroxides of different metals, and their general chemical formula is: [M(II) 1–xM (III) x (OH) 2 ] x+ (A n– ) x / n ·mH 2 O, where M(II) and M(III) represent divalent and trivalent metals, respectively, A n- As anion, it has broad application prospects in catalysis, separation, biology, energy storage and other fields. Generally, these materials have at least two metal ions with different valences (+2, +3 valences), and traditional methods such as coprecipitation, ion exchange, and hydrothermal methods can all prepare LDHs. It is generally believed that the properties of a material depend to a large extent on its morphology, and the above methods basically only focus on o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G51/00C01G51/04
CPCC01G51/00C01G51/04C01P2004/62C01P2004/20C01P2002/72C01P2004/03C01P2004/04C01P2006/12
Inventor 柳勇魏慧洁任凤章熊毅陶枫李孝森
Owner HENAN UNIV OF SCI & TECH
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