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Production method of core-shell hierarchical structure porous carbon

A hierarchical structure and hierarchical porous technology, which is applied in the field of preparation of nitrogen-doped core-shell hierarchical porous carbon, can solve the problems of low conductivity and difficult preparation of porous carbon materials, and achieves low requirements for experimental equipment, easy operation, and improved electrical conductivity. sexual effect

Active Publication Date: 2015-09-23
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the preparation of small-sized hierarchical porous carbon based on MOFs is still a technical difficulty
In addition, compared with carbon materials such as carbon nanotubes and graphene, the conductivity of porous carbon materials is not high, and it is a difficult problem to prepare hierarchical porous carbon with high conductivity.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Dissolve polyvinylpyrrolidone in the mixed solution of N,N-dimethylformamide and ethanol, the volume ratio of the above N,N-dimethylformamide and ethanol is 5:3, add zinc nitrate hexahydrate to the above reaction solution In the process, after stirring evenly, add terephthalic acid, wherein the mass ratio of polyvinylpyrrolidone: zinc nitrate hexahydrate: terephthalic acid is 1: 1: 2, transfer it to a polytetrafluoroethylene reactor at 100°C after fully stirring After reacting for 6 h, naturally cooling to room temperature, centrifuging and washing, vacuum drying at 60 °C to obtain hollow metal-organic framework powder samples. The hollow metal-organic framework powder was added to 10 mM Tris buffer solution (pH=8.5), and dopamine hydrochloride was added after ultrasonication for 20 min. The mass ratio of the hollow metal-organic framework to dopamine hydrochloride was 3:1, reacted at room temperature for 12 h, and centrifuged to wash. Dried at 60°C to obtain a polydopa...

Embodiment 2

[0017] Dissolve polyvinylpyrrolidone in the mixed solution of N,N-dimethylformamide and ethanol, the volume ratio of the above N,N-dimethylformamide and ethanol is 5:3, add zinc nitrate hexahydrate to the above reaction solution After stirring evenly, add terephthalic acid, wherein the mass ratio of polyvinylpyrrolidone: zinc nitrate hexahydrate: terephthalic acid is 6: 1: 2, and transfer it to a polytetrafluoroethylene reactor at 120°C after fully stirring After reacting for 12 h, cooling to room temperature naturally, centrifuging and washing, and vacuum drying at 60°C, the hollow metal-organic framework powder samples were obtained. The hollow metal-organic framework powder was added to 10 mM Tris buffer solution (pH=8.5), and dopamine hydrochloride was added after ultrasonication for 40 min. The mass ratio of the hollow metal-organic framework to dopamine hydrochloride was 2:1, reacted at room temperature for 24 h, and centrifuged to wash. Dried at 60°C to obtain a polydop...

Embodiment 3

[0019] Dissolve polyvinylpyrrolidone in the mixed solution of N,N-dimethylformamide and ethanol, the volume ratio of the above N,N-dimethylformamide and ethanol is 5:3, add zinc nitrate hexahydrate to the above reaction solution In the process, after stirring evenly, add terephthalic acid, wherein the mass ratio of polyvinylpyrrolidone: zinc nitrate hexahydrate: terephthalic acid is 12:1:2, transfer it to a polytetrafluoroethylene reactor at 150°C after fully stirring Reacted for 10 h, cooled naturally to room temperature, centrifuged and washed, 60 o C Vacuum drying to obtain a hollow metal-organic framework powder sample. The hollow metal-organic framework powder was added to 10 mM Tris buffer solution (pH=8.5), and dopamine hydrochloride was added after ultrasonication for 60 min. The mass ratio of the hollow metal-organic framework to dopamine hydrochloride was 1:2, reacted at room temperature for 36 h, and centrifuged to wash. Dried at 60°C to obtain a polydopamine hollo...

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Abstract

The invention belongs to the technical field of carbon material production and relates to a production method of core-shell hierarchical structure porous carbon. The production method based on a metal organic frame is characterized in that polymer monomer containing nitrogen polymerizes on the surface of the hollow metal organic frame to form a core-shell structure, calcination is controlled to obtain the core-shell hierarchical porous carbon, the core is nanoscale hollow hierarchical porous carbon, and the shell is nitrogen-doped carbon. The core-shell hierarchical structure porous carbon has a hierarchical duct structure, nanoscale particle size and high conductivity. The method is simple, easy in process control, widely applicable to electrochemical fields such as super-capacitors, capacitive desalting and lithium ion battery.

Description

technical field [0001] The invention belongs to the technical field of carbon material manufacturing technology, and relates to a method for preparing nitrogen-doped core-shell hierarchical porous carbon based on metal organic framework. The composite material prepared by the invention can be widely used in electrochemical fields such as supercapacitors, capacitive desalination, lithium ion batteries and the like. Background technique [0002] Due to its high specific surface area, unique pore structure, and low cost, porous carbon materials are widely used as gas separation agents, catalyst supports, and electrode materials for supercapacitors. The traditional method for preparing porous carbon is pyrolysis of organic polymers followed by physical or chemical activation. Activated porous carbons tend to have higher specific surface area, but larger particle size, higher degree of disorder, and wider pore size distribution. Therefore, the pores of the activated porous ca...

Claims

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Application Information

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IPC IPC(8): C01B31/02
Inventor 张登松施利毅王慧颜婷婷赵珊珊
Owner SHANGHAI UNIV
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