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A method for preparing three-dimensional bowl-shaped porous carbon materials based on carbon nanotubes

A technology of porous carbon materials and carbon nanotubes, which is applied in nanotechnology, nanotechnology, nanotechnology and other directions for materials and surface science, can solve the problems of cumbersome preparation process, complicated post-processing, introduction of impurities, etc., and achieve the preparation process. Simple, not demanding synthetic conditions, and environmentally friendly effects

Inactive Publication Date: 2016-06-01
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The present invention provides a method for preparing a three-dimensional bowl-shaped porous carbon material based on carbon nanotubes in order to solve the problems of cumbersome preparation process, unavoidable introduction of impurities in the synthesis process, high price and complicated post-treatment in the existing method.

Method used

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  • A method for preparing three-dimensional bowl-shaped porous carbon materials based on carbon nanotubes
  • A method for preparing three-dimensional bowl-shaped porous carbon materials based on carbon nanotubes
  • A method for preparing three-dimensional bowl-shaped porous carbon materials based on carbon nanotubes

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specific Embodiment approach 1

[0031] Embodiment 1: A method for preparing a three-dimensional bowl-shaped porous carbon material based on carbon nanotubes in this embodiment is carried out in the following steps:

[0032] 1. Place the carbon nanotubes in a mixed acid composed of concentrated sulfuric acid and concentrated nitric acid, reflux at a temperature of 80-85°C for 2h-3h, centrifuge and wash for dialysis, and then place them in an oven at a temperature of 60-70°C Drying in the middle to obtain the processed carbon nanotube powder;

[0033] The volume ratio of concentrated sulfuric acid and concentrated nitric acid in the mixed acid of described concentrated sulfuric acid and concentrated nitric acid is (2~4):1; Described concentrated sulfuric acid is the concentrated sulfuric acid of mass fraction 95%~99%, described concentrated Nitric acid is concentrated nitric acid with a mass fraction of 60% to 70%;

[0034] 2. Mix polyvinylpyrrolidone, deionized water and the treated carbon nanotube powder ob...

specific Embodiment approach 2

[0048] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the volume ratio of concentrated sulfuric acid and concentrated nitric acid in the mixed acid composed of concentrated sulfuric acid and concentrated nitric acid described in step 1 is 3:1. Other steps and parameters are the same as those in the first embodiment.

specific Embodiment approach 3

[0049] Specific embodiment three: this embodiment is different from specific embodiment one or two in that: the concentrated sulfuric acid described in step one is concentrated sulfuric acid with a mass fraction of 98%. Other steps and parameters are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a method for preparing a three-dimensional bowl-shaped porous carbon material based on a carbon nanotube and relates to a preparation method of a porous carbon material and particularly relates to the method for preparing the three-dimensional bowl-shaped porous carbon material based on the carbon nanotube. The method disclosed by the invention aims to solve the problem that in the existing method, the preparation process is tedious, impurities can be introduced to the synthetic process inevitably, the price is high and posttreatment is complex. The method comprises the following steps: I, putting the carbon nanotube in a mixed acid of concentrated sulfuric acid and concentrated nitric acid, centrifugally washing after reflux reaction and then dialyzing, and drying; II, mixing polyvinylpyrrolidone, deionized water and the product in the step I and stirring and carrying out ultrasonic treatment; III, pouring the product in the step II into an injector I, pouring dimethicone into an injector II, and propelling matters in the injectors I and II into a PP receiver of a microfluidic device by virtue of an injection pump; IV, firstly curing and drying and pre-oxidizing after washing by normal hexane; and V, carbonizing to obtain the three-dimensional bowl-shaped porous carbon material.

Description

technical field [0001] The invention relates to a method for preparing a porous carbon material, in particular to a method for preparing a three-dimensional bowl-shaped porous carbon material based on carbon nanotubes. Background technique [0002] Since carbon nanotubes were discovered by Iijima in 1991, due to their unique hollow structure, nanometer size, unusually high aspect ratio, and large specific surface area, they have attracted a lot of scientific attention due to their excellent physical and chemical properties, mechanical properties, and thermal stability. widespread attention in the world. It has a wide range of applications in many fields such as solar cells, catalysis, environmental fields and biotechnology industries. Porous carbon materials, a material with a certain size and number of pore structures, are widely used in supercapacitors, catalysts and catalyst supports, and adsorbents because of their large specific surface area, high porosity, and good el...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/02B82Y30/00B82Y40/00
Inventor 孙立国卜志鹏黄楠张艳红汪成
Owner HEILONGJIANG UNIV
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