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Hierarchical porosity carbon fiber material, preparation method and application thereof

A technology of carbon fiber and layered holes, applied in the field of materials, can solve the problems of low utilization level of sisal fiber and low added value, and achieve the effect of high output and simple preparation process

Active Publication Date: 2012-06-20
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It can be seen that the current utilization level of sisal fiber is low, and the added value is not high. Therefore, it is necessary to make full and effective use of this high-yield renewable resource and develop the application of sisal fiber in new technologies, new materials and new energy to improve its Added value has important practical significance

Method used

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  • Hierarchical porosity carbon fiber material, preparation method and application thereof
  • Hierarchical porosity carbon fiber material, preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] The steps of preparing hierarchical porous carbon fiber material with sisal fiber as raw material are as follows:

[0032](1) Clean the sisal fibers, cut them to a length of 0.1-0.5 cm, and then place them in an oven to dry at 100° C. for 6 hours.

[0033] (2) Place the pretreated sisal fibers in step (1) in a carbonization furnace, and raise the temperature to 500°C at a heating rate of 5°C / min under a nitrogen atmosphere with a flow rate of 400ml / min, and then carbonize at a constant temperature After 3 hours, a hierarchical porous carbon fiber material was obtained.

[0034] The scanning electron microscope of the hierarchical porous carbon fiber material prepared by the above steps is as follows: figure 1 Shown in A and B.

[0035] Tested with ASAP2010 adsorption instrument nitrogen adsorption method and PoreMaster60 mercury intrusion instrument produced by Micromeritics Company of the United States, the specific surface area (BET) of the prepared hierarchical por...

Embodiment 2

[0039] The steps of preparing a high specific surface area hierarchical porous carbon fiber material with sisal fiber as raw material are as follows:

[0040] (1) 5g KOH is dissolved in the solvent obtained after mixing 10ml water and 6ml absolute ethanol to obtain a solution containing etchant KOH, then add 1g of the hierarchical hole carbon fiber made in Example 1, fully stir, and The mixture was dried at 100 °C for 6 h;

[0041] (2) Place the dried mixture in a carbonization furnace, raise the temperature to 900°C at a rate of 5°C / min under a nitrogen atmosphere with a flow rate of 400ml / min, activate at a constant temperature for 3 hours, and wait for the temperature of the carbonization furnace to drop to Take out the mixture at 50°C, wash the mixture 3 times with boiling with a solution obtained by mixing 100ml deionized water and 10ml 37% hydrochloric acid, wash once with 200ml deionized water, filter and dry at 110°C for 12h to obtain a high specific surface area Hier...

Embodiment 3

[0046] The steps of preparing a high specific surface area hierarchical porous carbon fiber material with sisal fiber as raw material are as follows:

[0047] (1) 3g KOH is dissolved in the solvent obtained after mixing 10ml water and 6ml absolute ethanol to obtain a solution containing etchant KOH, then add 1g of the hierarchical porous carbon fiber material obtained in Example 1, and stir well, Dry the mixture at 100°C for 6h;

[0048] (2) Place the dried mixture in a carbonization furnace, raise the temperature to 900°C at a rate of 5°C / min under a nitrogen atmosphere with a flow rate of 400ml / min, activate at a constant temperature for 3 hours, and when the temperature of the carbonization furnace drops to Take out the mixture at 50°C, wash the mixture 3 times with a solution obtained by mixing 100ml deionized water and 10ml 37% hydrochloric acid with boiling, wash once with 200ml deionized water, filter and dry at 110°C for 12h to obtain a high ratio Surface area hierarc...

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Abstract

The invention belongs to the technical field of materials, and discloses a hierarchical porosity carbon fiber material, a preparation method and an application thereof. Cleaned sisal fiber which is cut or woven into a special shape is used as raw material, and is subjected to constant temperature carbonization for 0.5 to 6 h at 300-900 DEG C in an inert atmosphere to obtain hierarchical porosity carbon fiber; and then the obtained hierarchical porosity carbon fiber is uniformly mixed with potassium hydroxide solution, dried and subjected to constant temperature activation for 0.5-6 hours at 500-900 DEG C, and then is subjected to acid washing, water washing, filtering and drying to obtain hierarchical porosity carbon fiber material with high specific surface. The hierarchical porosity carbon fiber material of the invention has the following advantages: the preparation method is simple and easy, the raw material is environment-friendly, the production cost is low, the obtained hierarchical porosity carbon fiber and the obtained hierarchical porosity carbon fiber material with high specific surface have unique hierarchical porous structures, the specific surface of the hierarchical porosity carbon fiber material is up to 3,350 m2 / g, and the material has good adsorptive property, is in shapes of rope, felt, cloth, paper and the like, is convenient to use, and has a wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a hierarchical porous carbon fiber material prepared by using sisal fibers, a preparation method and application thereof. Background technique [0002] In recent years, hierarchical porous carbon materials have attracted increasing attention in the field of materials science, because hierarchical porous carbon materials have a ternary nanopore structure with adjustable and controllable pore diameters and reasonable distribution of micropores, mesopores, and macropores. The characteristics of the unique binary / ternary structure interaction synergy: macropores provide efficient proton transport sites, which can greatly reduce diffusion resistance, mesopores can act as proton transport channels, and micropores and / or mesopores can improve reaction species. degree of dispersion and provide enough active centers. Studies have confirmed that these characteristics make hi...

Claims

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Application Information

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IPC IPC(8): D01F9/16D01F11/10B01J20/20B01J20/28B01J20/30H01G9/042
CPCY02E60/13
Inventor 吴丁财梁业如吴炳明符若文
Owner SUN YAT SEN UNIV
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