Porous carbon flower adsorbing material and preparation method and application thereof

A technology of adsorption materials and porous carbon, which is applied in the field of adsorption materials, can solve the problems of complex preparation process and low adsorption capacity of solid adsorption materials, and achieve good recycling performance, high adsorption performance and good reproducibility

Active Publication Date: 2017-05-24
SHAANXI YUTENG IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Existing CO 2 The preparation process of solid adsorption materials is complicated, and there is a problem of low adsorption capacity

Method used

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  • Porous carbon flower adsorbing material and preparation method and application thereof
  • Porous carbon flower adsorbing material and preparation method and application thereof
  • Porous carbon flower adsorbing material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Porous carbon flowers are prepared by template-free method (solvothermal method):

[0032] Synthesize polyimide first: Measure 60mL of methylformamide into a beaker with a graduated cylinder, then add 0.89g of benzidine, put in a magnet and stir at a high speed until the benzidine is completely dissolved. Weigh 1.421 g of biphenyltetracarboxylic dianhydride and add it into the above beaker to continue stirring for 10 h to obtain polyimide.

[0033] Crystallization process: transfer the polyimide in the beaker to a reaction kettle with a polytetrafluoroethylene liner for crystallization at 180°C for 10 hours, filter the yellow precipitate obtained after crystallization in a vacuum filter, and use methyl formazan The amide was washed twice and then washed once with absolute ethanol, and then placed in a vacuum oven at 60° C. overnight to obtain a yellow solid powder.

[0034] High-temperature activation: the dried three-dimensional layered polymer obtained in the previou...

Embodiment 2

[0046] Porous carbon flowers are prepared by template-free method (solvothermal method):

[0047] Synthesize polyimide first: Measure methyl formamide in a beaker with a graduated cylinder, then add 0.89g of benzidine, put in a magnet and increase the speed to stir until the benzidine is completely dissolved, and the concentration of benzidine is 14.8gL -1 The solution. Weigh 1.421 g of biphenyltetracarboxylic dianhydride and add it into the above beaker to continue stirring for 10 h to obtain polyimide. Wherein, the mass of biphenyltetracarboxylic dianhydride is 1.6 times that of benzidine.

[0048] Crystallization process: Transfer the polyimide in the beaker to a reaction kettle with a polytetrafluoroethylene liner for crystallization at 170°C for 10 hours, filter the yellow precipitate obtained after crystallization in a vacuum filter, and use methyl formaldehyde The amide was washed twice and then washed once with absolute ethanol, and then placed in a vacuum oven at 60...

Embodiment 3

[0051] Porous carbon flowers are prepared by template-free method (solvothermal method):

[0052] Synthesize polyimide first: Measure methyl formamide in a beaker with a graduated cylinder, then add 0.89g of benzidine, put in a magnet and increase the speed to stir until the benzidine is completely dissolved, and the concentration of benzidine is 14.8gL -1 The solution. Weigh 1.421 g of biphenyltetracarboxylic dianhydride and add it into the above beaker to continue stirring for 10 h to obtain polyimide. Wherein, the mass of biphenyltetracarboxylic dianhydride is 1.6 times that of benzidine.

[0053] Crystallization process: transfer the polyimide in the beaker to a reaction kettle lined with polytetrafluoroethylene for crystallization at 190°C for 10 hours, and suction-filter the yellow precipitate obtained after crystallization in a vacuum filter. The amide was washed twice and then washed once with absolute ethanol, and then placed in a vacuum oven at 60° C. overnight to ...

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Abstract

The invention relates to a porous carbon flower adsorbing material and a preparation method and application thereof. The preparation method comprises the following steps of adding benzidine into an organic solvent, and stirring until the benzidine is dissolved, so as to obtain a solution; adding biphenyltetracarboxylic dianhydride to continue to uniformly stir, so as to obtain polyimide; performing hydrothermal crystallizing on the polyimide for 10h at the temperature of 170 to 190 DEG C, so as to obtain a precipitate; washing, and drying, so as to obtain a yellow solid powder; putting the yellow solid powder under the nitrogen atmosphere for 1 to 3h at the temperature of 350 DEG C; continuing to heat to 900 DEG C, and warming for 2 to 4h, so as to obtain the porous carbon flower adsorbing material. The preparation method has the advantages that the preparation technology is simple, a template is not needed, the self-assembly effect is realized, the experiment cycle is short, the reoccurrence is good, the reaction condition is mild, the product shape is controllable, the dispersivity is good, the circulating property is good, and the higher reference and study value on the novel high-efficiency CO2 (carbon dioxide) adsorbing material is realized.

Description

technical field [0001] The invention relates to an absorbent material, in particular to a porous carbon flower adsorption material and its preparation method and application. Background technique [0002] With the vigorous development of modern industry, global CO 2 Concentrations gradually increased, CO 2 It is the main gas that produces the greenhouse effect. The greenhouse effect will lead to a series of environmental problems such as global warming, melting glaciers, rising sea levels, and increased pests and diseases. Currently due to CO 2 Environmental problems caused by elevated concentrations have become global environmental problems. CO 2 Capture and storage technology (CCS) is the control of CO 2 One of the effective means of emission. Carbon materials Porous carbon-based materials include activated carbon, carbon nanotubes, carbon molecular sieves, and ordered mesoporous carbon, among which ordered mesoporous carbon is a porous nanocarbon material with a po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/28B01J20/20B01J20/30B01D53/02B01D53/047
CPCB01D53/02B01D53/047B01J20/20B01J20/28064B01D2253/102B01D2257/504Y02C20/40
Inventor 何炽陈长伟潘华于艳科郑春莉刘萍萍
Owner SHAANXI YUTENG IND
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