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Foamy carbon doped ZIF-67 pyrolysis derived carbon material and preparation method thereof

A ZIF-67, carbon foam technology, applied in the field of composite materials, can solve the problems of unsatisfactory performance of bifunctional catalysts, and achieve the effects of excellent oxygen evolution/hydrogen reaction durability, good catalytic performance, and enhanced electron transport ability.

Active Publication Date: 2020-04-21
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the advancement of science and technology, the performance of bifunctional catalysts obtained by simply pyrolyzing ZIF-67 can no longer meet people's needs

Method used

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  • Foamy carbon doped ZIF-67 pyrolysis derived carbon material and preparation method thereof
  • Foamy carbon doped ZIF-67 pyrolysis derived carbon material and preparation method thereof
  • Foamy carbon doped ZIF-67 pyrolysis derived carbon material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A kind of carbon foam mixed with ZIF-67 pyrolysis derivative carbon material, the specific preparation method is as follows:

[0046] 1) Put 2g of zinc nitrate hexahydrate and 1g of sucrose in a beaker and mix them uniformly. After obtaining a liquid mixture of sucrose and zinc nitrate in an oil bath at 110°C for 10 minutes, quickly place it in a blast drying oven at 120°C. Place 30min to obtain dark brown zinc-doped carbon foam;

[0047] 2) Dissolve 0.291g of cobalt nitrate hexahydrate and 0.66g of 2-methylimidazole in 15mL of methanol respectively to form a transparent cobalt nitrate solution and 2-methylimidazole solution. After ultrasonication for 10min, mix the two solutions to form a purple solution. Magnetically stir at room temperature for 24 hours, centrifuge the mixed solution and wash several times with methanol alcohol until the supernatant is colorless and transparent, place the purple precipitate after alcohol washing in a vacuum drying oven at 80°C for 12...

Embodiment 2

[0050] A kind of carbon foam mixed with ZIF-67 pyrolysis derivative carbon material, the specific preparation method is as follows:

[0051] 1) Put 2g of zinc nitrate hexahydrate and 1g of sucrose in a beaker and mix them uniformly. After obtaining a liquid mixture of sucrose and zinc nitrate in an oil bath at 120°C for 10 minutes, quickly place it in a blast drying oven at 120°C. Place 30min to obtain dark brown zinc-doped carbon foam;

[0052] 2) Dissolve 0.291g of cobalt nitrate hexahydrate and 0.66g of 2-methylimidazole in 15mL of methanol respectively to form a transparent cobalt nitrate solution and 2-methylimidazole solution. After ultrasonication for 10min, mix the two solutions to form a purple solution. Magnetically stir at room temperature for 24 hours, centrifuge the mixed solution and wash several times with methanol alcohol until the supernatant is colorless and transparent, place the purple precipitate after alcohol washing in a vacuum drying oven at 80°C for 12...

Embodiment 3

[0060] A kind of carbon foam mixed with ZIF-67 pyrolysis derivative carbon material, the specific preparation method is as follows:

[0061] 1) Put 2g of zinc nitrate hexahydrate and 1g of sucrose in a beaker and mix them uniformly. After obtaining a liquid mixture of sucrose and zinc nitrate in an oil bath at 110°C for 10 minutes, quickly place it in a blast drying oven at 120°C. Place 30min to obtain dark brown zinc-doped carbon foam;

[0062] 2) Dissolve 0.291g of cobalt nitrate hexahydrate and 0.66g of 2-methylimidazole in 15mL of methanol respectively to form a transparent cobalt nitrate solution and 2-methylimidazole solution. After ultrasonication for 10min, mix the two solutions to form a purple solution. Magnetically stir at room temperature for 24 hours, centrifuge the mixed solution and wash several times with methanol alcohol until the supernatant is colorless and transparent, place the purple precipitate after alcohol washing in a vacuum drying oven at 80°C for 12...

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Abstract

The invention relates to a foamy carbon doped ZIF-67 pyrolysis derived carbon material and a preparation method thereof. The preparation method for the foamy carbon doped ZIF-67 pyrolysis derived carbon material comprises the following method: 1) synthesis of zinc doped foamy carbon; (2) synthesis of ZIF-67; and 3) synthesis of the foamy carbon doped ZIF-67 pyrolysis derived carbon material: uniformly mixing the zinc doped foamy carbon with ZIF-67 powder, then putting the formed mixture into a tubular furnace, carrying out pyrolysis treatment in an inert atmosphere, and carrying out cooling toroom temperature to obtain the foamy carbon doped ZIF-67 pyrolysis derived carbon material. The zinc-doped carbon precursor and the ZIF-67 are mixed and are then pyrolyzed in an inert atmosphere, sothe prepared material has a relatively large specific surface area; in addition, a large number of carbon nanotubes appear in the composite material, so the electron transmission capacity during electrochemical oxygen / hydrogen evolution is enhanced; and the provided zinc-doped ZIF-67 pyrolysis derived carbon material has efficient electro-catalytic performance, high stability and excellent oxygen / hydrogen evolution reaction durability in an alkaline medium.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a foam carbon mixed with ZIF-67 pyrolysis derived carbon material and a preparation method thereof. Background technique [0002] Metal-organic frameworks (MOFs for short) are three-dimensional crystalline materials with high porosity and large specific surface area formed by bridging metal centers with organic ligands. In recent years, MOFs have been widely used in catalytic reactions, gas adsorption, energy conversion and storage due to their structural variability and functional diversity. Since the stability of the coordination bond between the metal center ion and the organic ligand of MOFs material is between covalent bond and hydrogen bond, the practical application is limited by its thermal stability and chemical stability. Porous carbon materials prepared by high-temperature pyrolysis of MOFs is one of the important ways to solve this problem. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/80B01J35/10C01B32/05C25B1/04C25B11/06
CPCB01J23/80C01B32/05C25B1/04C25B11/091B01J35/33B01J35/61Y02E60/36
Inventor 弗朗西斯·沃波特王积超沙南陈宬
Owner WUHAN UNIV OF TECH
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