ZIF-8@FeMOF derived Fe-N codoped carbon material, and preparation method and application of material
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A ZIF-8, co-doping technology, applied in the field of doped materials, can solve the problem of incomplete preservation of morphology
Active Publication Date: 2019-04-12
ANHUI NORMAL UNIV
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FeMOF alone cannot completely preserve its morphology at high temperature
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preparation example Construction
[0025] The present invention provides a preparation method of Fe-N co-doped carbon material derived from ZIF-8@FeMOF, comprising:
[0026] 1) In a solvent, FeMOF, zinc source, 2-methylimidazole, and surfactant are subjected to a contact reaction to prepare ZIF-8@FeMOF;
[0027] 2) Calcining ZIF-8@FeMOF to obtain Fe-N co-doped carbon materials derived from ZIF-8@FeMOF;
[0028] Among them, FeMOF is Fe 3+ A metal-organic framework material with a network structure composed of organic ligands; ZIF-8 is composed of Zn 2+ A zeolite imidazolate framework material obtained by reacting with 2-methylimidazole.
[0029] In step 1) of the present invention, the amount of each material can be selected in a wide range, but in order to further improve the yield and catalytic performance of the obtained Fe-N co-doped carbon material, preferably, in step 1) In the method, the dosage ratio of FeMOF, zinc source, 2-methylimidazole and surfactant is 10mg: 1-4mmol: 7-16mmol: 0.01-0.05mmol.
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preparation example 1
[0052] With 12mL of DMF as solvent, add 0.30g of ferric chloride hexahydrate (1.1mmol), 0.10g (0.55mmol) of 2-aminoterephthalic acid, stir at 25°C for 30min, then transfer to a reaction kettle for heat treatment at 150°C for 24h After cooling DMF, centrifuging, washing, and drying, FeMOF was obtained; denoted as A1.
preparation example 2
[0054] FeMOF was prepared according to the method of Preparation Example 1, which was denoted as A2; the difference was that ferric chloride hexahydrate was replaced by an equimolar amount of ferric nitrate, and the amount of 2-aminoterephthalic acid was 1 mmol.
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Abstract
The invention discloses a ZIF-8@FeMOF derived Fe-N codoped carbon material, and a preparation method and an application of the material. The preparation method comprises the steps of 1) performing a contact reaction on FeMOF, a zinc source, 2-methylimidazole and a surfactant in a solvent to prepare ZIF-8@FeMOF, and 2) performing calcination on ZIF-8@FeMOF to prepare the ZIF-8@FeMOF derived Fe-N codoped carbon material, wherein FeMOF is a metal-organic framework material which consists of Fe<3+> and an organic ligand and has a reticular structure; and ZIF-8 is a zeolite imidazate framework material obtained by a reaction of Zn<2+> and 2-methylimidazole. The ZIF-8@FeMOF derived Fe-N codoped carbon material has a loose porous structure and many active sites, and can efficiently catalyze a cathodic oxygen reduction reaction of a fuel cell; and the preparation method has the advantages of greenness, cleanness, high efficiency, simplicity, low cost and the like.
Description
technical field [0001] The present invention relates to doped materials, in particular to a ZIF-8@FeMOF derived Fe-N co-doped carbon material and its preparation method and application. Background technique [0002] With the depletion of energy resources and the aggravation of environmental pollution. As an energy conversion and storage device, fuel cells have become a research hotspot today. Metal-organic frameworks (MOFs) are inorganic-organic hybrid functional materials assembled by metal ions and organic ligands through coordination bonds, which have the characteristics of large specific surface area, porosity, and diverse structures. , has a good development prospect in the fields of gas storage, liquid phase separation and catalysis. Zeolitic imidazolate frameworks (ZIFs) are a branch of metal-organic frameworks with high chemical and thermal stability. ZIF-8 is composed of Zn 2+ A zeolite imidazolate framework material obtained by reacting with ligand 2-methylimid...
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