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Preparation method of one-dimensional porous carbon nanotube

A technology of porous carbon and nanotubes, applied in the direction of carbon nanotubes, nanocarbons, chemical instruments and methods, etc., can solve the problem of reducing the number of mesopores, and achieve the effect of an environmentally friendly preparation process

Inactive Publication Date: 2017-06-13
JIANGSU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But its disadvantage is that the molar ratio of Zn to Co should be strictly controlled higher than 10:1 during the preparation process, and the higher Co content will reduce the number of mesopores due to the collapse of the carbon skeleton.

Method used

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  • Preparation method of one-dimensional porous carbon nanotube
  • Preparation method of one-dimensional porous carbon nanotube
  • Preparation method of one-dimensional porous carbon nanotube

Examples

Experimental program
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Embodiment 1

[0043] (1) Take 80.0 mg of ZnO nanowires and add them to an Erlenmeyer flask filled with a mixed solvent of DMF and water (64 mL, volume ratio 3:1), ultrasonicate for 20 min at room temperature to fully diffuse, and then add 0.41 g of 2-methyl For imidazole, after ultrasonication for 2-3min, add 18.0mg of cobalt salt and mix evenly, pour the solution in the conical flask into a hydrothermal kettle, and place it in a 50°C oven to react for 4h. After the reaction, centrifuge, wash and dry , to obtain the ZnO@Zn / Co-ZIF precursor.

[0044] (2) The ZnO@Zn / Co-ZIF precursor obtained in step 1) was placed in a high-temperature tube furnace, and the temperature was raised to 800 °C at a rate of 5 °C / min in a nitrogen atmosphere with an inert gas flow rate of 50 mL / min. After carbonization at 900° C. for 3 h, it was naturally cooled to room temperature to obtain the nitrogen-cobalt co-doped one-dimensional porous carbon nanotube (Co / NCNT) of the present invention.

[0045] from figure...

Embodiment 2

[0047] (1) Take 80.0 mg of ZnO nanowires and add them to an Erlenmeyer flask filled with a mixed solvent of DMF and water (64 mL, volume ratio 2:1), ultrasonicate for 20 min at room temperature to fully diffuse, and then add 1.6 g of 2-methyl For imidazole, after ultrasonication for 2-3min, add 12.0mg of cobalt salt and mix evenly, pour the solution in the conical flask into a hydrothermal kettle, and place it in an oven at 60°C for 3h. After the reaction, centrifuge, wash and dry , to obtain the ZnO@Zn / Co-ZIF precursor.

[0048] (2) The ZnO@Zn / Co-ZIF precursor obtained in step 1) was placed in a high-temperature tube furnace, and the temperature was raised to 800 °C at a rate of 5 °C / min in a nitrogen atmosphere with an inert gas flow rate of 50 mL / min. After carbonization at 800° C. for 3 h, it was naturally cooled to room temperature to obtain the nitrogen-cobalt co-doped one-dimensional porous carbon nanotube (Co / NCNT) of the present invention.

Embodiment 3

[0050] (1) Take 80.0 mg of ZnO nanowires and add them to an Erlenmeyer flask filled with a mixed solvent of DMF and water (64 mL, volume ratio 3:1). For imidazole, after ultrasonication for 2-3min, add 8.0mg of cobalt salt and mix evenly, pour the solution in the conical flask into a hydrothermal kettle, and place it in an oven at 70°C for 2h. After the reaction, centrifuge, wash and dry , to obtain the ZnO@Zn / Co-ZIF precursor.

[0051] (2) The ZnO@Zn / Co-ZIF precursor obtained in step 1) was placed in a high-temperature tube furnace, and the temperature was raised to 900 °C at a rate of 5 °C / min in a nitrogen atmosphere with an inert gas flow rate of 50 mL / min. After carbonization at 900° C. for 2 h, it was naturally cooled to room temperature to obtain the nitrogen-cobalt co-doped one-dimensional porous carbon nanotube (Co / NCNT) of the present invention.

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Abstract

The invention relates to a preparation method of a one-dimensional porous carbon nanotube. The one-dimensional porous carbon nanotube is of a nitrogen-doped one-dimensional porous carbon nanotube or a nitrogen and cobalt doped one-dimensional porous carbon nanotube; a ZnO@ZIF-8 and ZnO@Zn / Co-ZIF precursors are prepared by taking a ZnO nanowire as a nuclear and a monometallic zeolite-imidazate skeleton compound ZIF-8 or a bimetallic hybridization zeolite-imidazate skeleton compound Zn / Co-ZIF as a shell; ZnO@ZIF-8 or ZnO@Zn / Co-ZIF is subjected to high-temperature calcination in inert atmosphere to obtain the one-dimensional porous carbon nanotube. The preparation method is simple in synthesis, a nuclear layer template can be removed without acid pickling, and the preparation process which is environment friendly can be realized; the prepared carbon nanotube is high in specific surface area and rich in catalyst activity sites and has great application potential in fields of electrochemical energy storage, catalytic and metallic air batteries and the like.

Description

technical field [0001] The invention belongs to the technical field of carbon materials, in particular to a preparation method of one-dimensional porous carbon nanotubes. Background technique [0002] The oxygen reduction reaction (ORR) is an extremely important reaction in advanced energy conversion and storage devices such as fuel cells and metal-air batteries. Currently, platinum (Pt)-based catalysts are the most effective electrode catalysts for ORR. However, the large-scale commercial application of platinum catalysts is limited due to its high price, scarcity of resources, and susceptibility to potential fuel poisoning. Therefore, the development of cheap, efficient, and stable non-precious metal catalysts is the only way for large-scale commercialization of fuel cells and metal-air batteries. So far, researchers have developed a large number of platinum-free catalysts, including carbon-based catalysts, transition metal oxides, sulfides and carbides, etc. Among them...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/16
CPCC01B2202/32C01B2202/34C01B2202/36C01P2002/72C01P2004/03C01P2004/04
Inventor 宋肖锴郭琳丽周雅静王志贤
Owner JIANGSU UNIV OF TECH
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