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Nitrogen-rich porous carbon material derived from metal-organic framework and preparation method of nitrogen-rich porous carbon material derived from metal-organic framework

A metal-organic framework and porous carbon material technology, which can be used in the preparation/purification of carbon, and can solve problems such as single

Inactive Publication Date: 2017-03-08
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is: designing the microstructure so that the MOF-derived carbon material has a hierarchical pore structure can effectively improve its single pore size distribution and enhance the application prospect

Method used

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  • Nitrogen-rich porous carbon material derived from metal-organic framework and preparation method of nitrogen-rich porous carbon material derived from metal-organic framework
  • Nitrogen-rich porous carbon material derived from metal-organic framework and preparation method of nitrogen-rich porous carbon material derived from metal-organic framework
  • Nitrogen-rich porous carbon material derived from metal-organic framework and preparation method of nitrogen-rich porous carbon material derived from metal-organic framework

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Embodiment 1

[0031] The preparation of embodiment 1, ZIF-8 (40nm)

[0032] 50ml is dissolved with 2.47mmol zinc nitrate hexahydrate (Zn(NO 3 ) 2 ·6H 2 (2) methanol solution mixed with 50ml and 19.85mmol 2-methylimidazole (2-mIm) methanol solution, stirred at room temperature for 1 hour, centrifuged the white solid at the bottom of the solution, and dried at 60°C to obtain a particle size of 40nm ZIF-8.

Embodiment 2

[0033] The preparation of embodiment 2, ZIF-8 (80nm)

[0034] 50ml dissolved with 3.6mmol Zn(NO 3 ) 2 ·6H 2 The methanol solution of O was mixed with 50ml of methanol solution dissolved in 28.71mmol 2-mIm, stirred at room temperature for 24 hours, the white solid at the bottom of the solution was separated by centrifugation, and dried at 60°C to obtain ZIF-8 with a particle size of 80nm.

Embodiment 3

[0035] Embodiment 3, preparation of three-dimensional nitrogen-rich porous carbon material

[0036] 300mg of prepared ZIF-8 (40nm) and 600mg of PVP (molecular weight 1,300,000) were fully mixed in methanol, dried at room temperature for 24 hours to remove methanol, and the resulting mixture was placed in a tube furnace with a heating rate of 2°C / min under nitrogen Under protection, it was raised to 900°C, kept for 2 hours, cooled to room temperature with the furnace, taken out, placed in 30% hydrofluoric acid and stirred for 24 hours, filtered, washed with distilled water, and dried at 60°C to obtain the product. Scanning electron microscope picture as figure 2 shown.

[0037] 300mg of prepared ZIF-8 (80nm) and 600mg of PVP (molecular weight 1,300,000) were fully mixed in methanol, dried at room temperature for 24 hours to remove methanol, and the resulting mixture was placed in a tube furnace with a heating rate of 2°C / min under nitrogen Under protection, it was raised to ...

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Abstract

The invention discloses a nitrogen-rich porous carbon material derived from a metal-organic framework and a preparation method of the nitrogen-rich porous carbon material derived from the metal-organic framework. The preparation method includes that a graded porous structure is introduced into a carbon material derived from ZIF-8 (zeolitic imidazolate framework-8) through PVP (polyvinyl pyrrolidone)-assisted confinement pyrolysis, three-dimensional (direct mixing), one-dimensional (electrostatic spinning after mixing) or two-dimensional (adding GO into raw materials) nitrogen-rich porous carbon materials can be prepared according to different ZIF-8 and PVP mixing modes, and macroporous / microporous (80 nm ZIF-8) or mesoporous / microporous (40 nm ZIF-8) nitrogen-rich carbon materials can be prepared according to different sizes of ZIF-8. The preparation method is simple and easy in expanded production and has huge application potential.

Description

technical field [0001] The invention belongs to the field of nano-carbon materials, and in particular relates to a nitrogen-rich porous carbon material derived from a metal organic framework and a preparation method thereof. It is a method for preparing nitrogen-rich porous carbon materials by using zeolite imidazole framework material (Zeolite imidazole framework, ZIF, a kind of MOF) and polyvinylpyrrolidone (polyvinylpyrrolidone, PVP) as precursors. Background technique [0002] Metal–organic frameworks (MOFs) are porous materials constructed from metal ions and organic ligands. Carbon materials prepared from MOF precursors have rich pore structures and have excellent application prospects in many fields. However, due to the structural characteristics of precursor MOFs, most of the prepared carbon materials only have microporous structures, which limits their application range. The existing methods for introducing hierarchical pores into MOF-derived carbon materials mainl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05
CPCC01P2004/03C01P2004/04C01P2006/16
Inventor 梁彦瑜来庆学赵颖轩
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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