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Carbon nanorod with high specific surface area and high nitrogen doping content, and simple preparation and application thereof

A high specific surface area, carbon nanorod technology, applied in the field of electrocatalysis, can solve the problems of high cost, the inability of ZIFs particles to ensure stable binding, and harsh synthesis conditions, and achieve low cost, multiple catalytic active sites, and simple synthesis process. Effect

Active Publication Date: 2019-05-28
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most carbon cloths need to be pretreated with nitric acid and sulfuric acid before use. The synthesis conditions are relatively strict and the cost is high; and ZIFs particles cannot guarantee stable bonding and will not detach from carbon cloths.

Method used

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  • Carbon nanorod with high specific surface area and high nitrogen doping content, and simple preparation and application thereof
  • Carbon nanorod with high specific surface area and high nitrogen doping content, and simple preparation and application thereof
  • Carbon nanorod with high specific surface area and high nitrogen doping content, and simple preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] 1) Disperse 0.4g of m-aminophenol and 0.51g of hexamethylenetetramine (HMTA) in 40ml of water, stir for 20min, then add 0.3g of cetyltrimethylammonium bromide (CTAB), and gradually Add 0.2ml of ammonia solution dropwise and stir for 10min. Transfer to an 85°C water bath and stir for 24 hours, centrifuge, wash, and dry to obtain evenly dispersed resin nanorods (RNR). Disperse 150mg of RNR, 0.381g of zinc nitrate hexahydrate and 0.043g of cobalt nitrate hexahydrate in 25mL of methanol solution, after ultrasonic dispersion, add 25mL of methanol solution in which 0.99g of dimethylimidazole is dissolved, and stir at room temperature for 12h , washed by centrifugation, and dried to obtain a Zn / Co-Zif embedded resin nanorod composite (RNR@Zn / Co-Zif);

[0043] 2) Calcinate the dried above sample in a tube furnace with an argon atmosphere at 800°C for 5h, with a heating rate of 2°C min -1 , to obtain black one-dimensional carbon nanorods (CNR@Co-ZDC) with high specific surface...

Embodiment 4

[0059] 1) Disperse 0.4g of m-aminophenol and 0.51g of hexamethylenetetramine (HMTA) in 40ml of water, stir for 20min, then add 0.3g of cetyltrimethylammonium bromide (CTAB), and gradually Add 0.2ml of ammonia solution dropwise and stir for 10min. Transfer to an 85°C water bath and stir for 24 hours, centrifuge, wash, and dry to obtain evenly dispersed RNR. Disperse 150mg RNR, 0.381g zinc nitrate hexahydrate and 0.043g cobalt nitrate hexahydrate in 25mL methanol solution, add 0.99g dimethylimidazole dissolved in 25mL methanol solution after ultrasonic dispersion, and stir at room temperature React for 12 hours, centrifuge, wash, and dry to obtain a Zn / Co-Zif embedded resin nanorod composite (RNR@Zn / Co-Zif);

[0060] 2) Calcinate the dried above sample in a tube furnace with an argon atmosphere at 700°C for 5h, with a heating rate of 2°C min -1 , get CNR@Co-ZDC-700.

[0061] as attached Figure 13 As shown, it can be obtained by XRD analysis that its peak position basically ...

Embodiment 5

[0063] 1) Disperse 0.4g of m-aminophenol and 0.51g of hexamethylenetetramine (HMTA) in 40ml of water, stir for 20min, then add 0.3g of cetyltrimethylammonium bromide (CTAB), and gradually Add 0.2ml of ammonia solution dropwise and stir for 10min. Transfer to an 85°C water bath and stir for 24 hours, centrifuge, wash, and dry to obtain evenly dispersed RNR. Disperse 150mg RNR, 0.381g zinc nitrate hexahydrate and 0.043g cobalt nitrate hexahydrate in 25mL methanol solution, add 0.99g dimethylimidazole dissolved in 25mL methanol solution after ultrasonic dispersion, and stir at room temperature React for 12 hours, centrifuge, wash, and dry to obtain a Zn / Co-Zif embedded resin nanorod composite (RNR@Zn / Co-Zif);

[0064] 2) Calcinate the dried above sample in a tube furnace with an argon atmosphere at 900°C for 5h with a heating rate of 2°C min -1 , get CNR@Co-ZDC-900.

[0065] as attached Figure 13 As shown, it can be obtained by XRD analysis that its peak position basically c...

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Abstract

The invention relates to a carbon nanorod with high specific surface area and high nitrogen doping content capable of being applied to a positive electrode catalyst for a zinc air battery and a simplepreparation method of the carbon nanorod. The carbon nanorod is a composite of a resin-based carbon nanorod and a zeolitic imidazolate framework-derived carbon material, the length is 2-4 mum, the nitrogen content is 10.29%, the surface of the carbon nanorod contains micropores, the specific surface area of the carbon nanorod is 478.7 m<2>g<-1>, and uniform cobalt quantum dots are dispersed inside the carbon nanorod. Compared with the prior art, the carbon nanorod and the preparation method thereof have the following advantages: the synthesis process is simple and the cost is low; a one-dimensional structure and in-situ highly-doped N content can effectively improve the electrical conductivity and electrochemical performance of the material; Co quantum dots can be uniformly distributed inthe nanorod and more catalytic active sites are provided; Zn / Co-Zif-derived microporous carbon has a particle size of about 80 nm, and the microporous carbon is embedded in the carbon nanorod to avoid agglomeration.

Description

technical field [0001] The invention belongs to the field of electrocatalysis, and in particular relates to a carbon nanorod with high specific surface area and high nitrogen doping content, which can be applied to the positive electrode catalyst of zinc-air batteries, and a simple preparation method thereof. Background technique [0002] Zeolite imidazolate framework materials (ZIFs) are MOFs materials with zeolite-like framework structure formed by the reaction of transition metals and imidazole or its derivative ligands in organic solvents. ZIFs materials combine the advantages of both zeolites and MOFs: high thermal and chemical stability as well as adjustable structure and function. At present, it has been widely used in gas adsorption separation, ion exchange, chemical catalysis and other fields. In order to obtain a higher specific surface area and more catalytic active sites, it is a common idea to nanosize ZIFs materials, but when the nanoscale ZIFs particles are s...

Claims

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Application Information

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IPC IPC(8): C01B32/15H01M4/90H01M12/06
Inventor 周亮于强麦立强吕建帅
Owner WUHAN UNIV OF TECH
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