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Method for preparing carbon material with uniform pore sizes by block polymer as template

A technology of block polymers and carbon materials, which is applied in the preparation/purification of carbon compounds and carbon, chemical instruments and methods, etc., can solve the problems of uncontrollable morphological pore size, etc., achieve good electrochemical activity, and is suitable for large-scale industry. The effect of chemical production and uniform aperture

Inactive Publication Date: 2018-05-29
SHANGHAI INSTITUTE OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the above-mentioned technical problems, the object of the present invention is to provide a preparation method of a porous carbon material with uniform pore size, which solves the problem that the morphological pore size of the reduced graphene oxide airgel in the prior art is uncontrollable during the hydrothermal reduction process

Method used

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  • Method for preparing carbon material with uniform pore sizes by block polymer as template
  • Method for preparing carbon material with uniform pore sizes by block polymer as template
  • Method for preparing carbon material with uniform pore sizes by block polymer as template

Examples

Experimental program
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Effect test

Embodiment 1

[0037] (1) Weigh 750 mg of graphene oxide solid in a beaker, add 150 ml of deionized water, and prepare a 5 mg / ml graphene oxide dispersion, which is evenly dispersed by ultrasonic;

[0038] (2) Weigh 750 mg of block copolymer P123 solid in a beaker, add 150 ml of deionized water to prepare a 5 mg / ml aqueous solution of P123, and ultrasonically disperse it evenly;

[0039] (3) Mix the solution in step (1) and step (2) according to the mass ratio of graphene oxide and P123 (molecular weight 7000-12000) at 1:1 and ultrasonically disperse evenly;

[0040](4) Transfer the solution obtained in step (3) to a straight cylinder reaction tube with a filling height of 0.7, put it in a polytetrafluoroethylene-lined hydrothermal kettle, and react for 12 hours at a temperature of 180° C. The temperature should not exceed 160-220°C, and the reaction time should be controlled within 8-24h;

[0041] (5) vacuum-dry the black hydrogel obtained in step (4) at 60°C for 12 hours (drying temperatu...

Embodiment 2

[0052] [Differential weight gain method] After the cylindrical carbon is prepared with the mass ratio of P123 and GO as 1:1, weigh its mass as m 1 , then completely immerse the cylindrical carbon in the organic solvent, let it stand for 5 minutes, take it out, remove the residual organic solvent on the surface of the cylindrical carbon with clean filter paper, and weigh its mass as m 2 . The adsorption capacity is calculated according to the following formula:

[0053]

[0054] The cylindrical carbon prepared with the mass ratio of P123 and GO as 1:1, the adsorption capacity of toluene is 66.4g / g; the cylindrical carbon prepared with the mass ratio of P123 and GO as 1:4, the adsorption capacity of toluene 187.5g / g;

Embodiment 3

[0056] [UV Spectroscopy] After the mass ratio of P123 and GO is 1:1, the cylindrical carbon prepared is ground into powder, and 10 mg of sample powder is added to 50 ml of 200 mg / L methylene blue solution, stirred for 1 hour and then left to stand. Take the supernatant, and then detect it by UV spectrum to obtain the absorbance at 664nm, and obtain the concentration C after adsorption according to the standard curve obtained by the standard Lambert-Beer's law. 0 . The adsorption capacity is calculated according to the following formula:

[0057] M=(200-C 0 )×0.05

[0058] According to the above example, a porous carbon material with uniform pores can be prepared. Through the synergistic effect of the template effect of the soft template and the water removal effect of closed vacuum heating, the composite of polymer and graphene can be realized. By choosing different drying methods, dense carbon materials can be prepared. Graphene airgel, and the graphene composite disc obta...

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Abstract

The invention discloses a method for preparing a carbon material with uniform pore sizes by a block polymer as a template. The method comprises 1) mixing an aqueous block polymer solution and an aqueous graphene oxide dispersion to obtain a polymer-mixed graphene oxide dispersion, 2) hydrothermally treating the dispersion for a reaction to obtain template-doped reduced graphene oxide aerogel, 3) dehydrating and drying the reduced graphene oxide aerogel under vacuum conditions to obtain graphene composite gel, 4) freeze-drying the reduced graphene oxide aerogel to obtain loose porous graphene aerogel, 5) tabletting the graphene aerogel to obtain graphene sheets and 6) carrying out heat treatment on the graphene composite gel and the graphene sheets to obtain a carbon material. The method has good controllability of the pore sizes. The carbon material can be processed into an all-solid-state electrode. The cylindrical carbon can be used as an adsorbent material.

Description

technical field [0001] The invention belongs to the technical field of new materials, in particular to a method for preparing a carbon material with uniform pore size by using a block polymer as a template. Background technique [0002] In recent years, great research has been done on porous materials in the field of new materials. Thanks to the good structure of the porous material itself, large specific surface area, easy modification and preparation, etc., the diversity of the substrate of the porous material itself makes it have many excellent performances, so it is widely used in biology, energy, environment and catalysis. field. [0003] Graphene material has been widely studied as a new type of material. Due to its unique two-dimensional honeycomb structure and its remarkable physical and chemical properties, it is recognized as a multi-purpose material and is widely used in new energy devices, sensors, biomedicine, Environmental adsorption and other fields. At pre...

Claims

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Application Information

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IPC IPC(8): C01B32/05C01B32/184C01B32/194
Inventor 卢德力任济夫张小杰常宾林静静刘玥冉韩生
Owner SHANGHAI INSTITUTE OF TECHNOLOGY
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