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
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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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