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A graphene three-dimensional hierarchical porous carbon material and its preparation method

A hierarchical porous and graphene technology, applied in the field of graphene three-dimensional hierarchical porous carbon materials and preparation, can solve the problems of high cost and complicated preparation process

Active Publication Date: 2015-09-23
HAINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These preparation processes are complex and costly, and in these preparation methods, the sources of raw materials are chemical raw materials. With the gradual depletion of fossil energy in the world today and the resulting global environmental deterioration, the use of chemical raw materials in the preparation process is subject to With more and more restrictions, seeking to use natural raw materials other than non-chemical raw materials to prepare graphene has become a major issue

Method used

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  • A graphene three-dimensional hierarchical porous carbon material and its preparation method
  • A graphene three-dimensional hierarchical porous carbon material and its preparation method
  • A graphene three-dimensional hierarchical porous carbon material and its preparation method

Examples

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Effect test

Embodiment 1

[0023] Add 1000 g of coconut shell powder to 1 L of disodium ethylenediaminetetraacetic acid solution with a mass concentration of 0.25%, mix well, place in a constant temperature water bath, treat at 85°C for 1.5h, wash and filter to separate the filter residue, Add 1 L of 7% H 2 o 2 Solution, 11% acetic acid, 8.5% nitric acid and 5% KCl were ultrasonically treated for 25 minutes, placed in a constant temperature water bath at 70°C, heated for 7 hours, cooled to room temperature, separated by filtration, and repeatedly washed with deionized water. Wash the filter residue until neutral, dry the filter residue, and then carbonize the obtained product at 850°C for 120 minutes under the protection of high-purity inert gas to obtain a carbonized material. Add composite activator (KOH, NaOH, Na 2 CO 3 , K 2 CO 3, ) and 4% deionized water, wherein the mass ratio of activator to carbonized material is 2.5:1, KOH, NaOH, Na 2 CO 3 , K 2 CO 3 The ratio is 1:1:2:2. After being f...

Embodiment 2

[0025] Add 60 g of coconut shell powder to 600 mL of disodium edetate solution with a mass concentration of 0.1%, mix well, place in a constant temperature water bath, treat at 50°C for 3 hours, wash and filter to separate the filter residue, add 600 mL Volume concentration is 4.5% H 2 o 2 Solution, 12% acetic acid, 9% nitric acid and 2.5% KCl were ultrasonically treated for 40 minutes, placed in a constant temperature water bath at 50°C, heated for 8 hours, taken out, cooled to room temperature, separated by filtration, and deionized The filter residue was repeatedly washed with water until neutral, and after drying, the filter residue was carbonized at 600°C for 150 minutes under the protection of high-purity inert gas to obtain carbonized material. Add complex activator (KOH, NaOH, Na 2 CO 3 , K 2 CO 3 ) and 4.5% deionized water, wherein the mass ratio of activator to carbonized material is 3:1, KOH, NaOH, NaOH in composite activator 2 CO 3 , K 2 CO 3 The ratio is ...

Embodiment 3

[0027] Add 40 g of coconut shell powder to 400 mL of disodium edetate solution with a mass concentration of 0.2%, mix well, place in a constant temperature water bath, treat at 90°C for 1 hour, wash and filter to separate the filter residue, add 400 mL 6% H by volume 2 o 2Solution, 15% acetic acid, 8% nitric acid and 4.5% KCl were ultrasonically treated for 20 minutes, placed in a constant temperature water bath at 60°C, heated for 6 hours, taken out, cooled to room temperature, separated by filtration, and deionized The filter residue was repeatedly washed with water until neutral, and after drying, the hemicellulose-removed fruit shell was carbonized at 650°C for 100 minutes under the protection of high-purity inert gas to obtain carbonized material. Add complex activator (KCl, KOH, NaOH, Na 2 CO 3 , K 2 CO 3, ZnCl 2 ) and 5% deionized water, wherein the mass ratio of activator to carbonized material is 4:1, KCl, KOH, NaOH, NaOH in the composite activator 2 CO 3 , K...

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Abstract

The invention provides method for preparation of a graphene three-dimensional hierarchical porous carbon material from biomass raw materials of coconut shell, palm shell and apricot shell. The method fully and reasonably utilizes rich resources of biowaste, and avoids the usage of chemical raw materials. The prepared graphene three-dimensional hierarchical porous carbon material has special laminated structure with wrinkles and hierarchical porous structure containing mesopore, micropore and macropore, so that the conductive performance of the material is better than similar materials in the prior art.

Description

technical field [0001] The invention relates to a graphene three-dimensional hierarchical porous carbon material and a preparation method thereof. Background technique [0002] Graphene is a new carbonaceous material with a single-layer honeycomb structure in which carbon atoms are tightly packed. Due to its many excellent physical and chemical properties, it has great application prospects in the fields of electronics, information, energy, materials, and biomedicine. . Especially in the field of energy, graphene has the characteristics of high conductivity, good flexibility, and high chemical stability, because the ultra-thin and flexible graphene layer can not only serve as a support for well-dispersed nanoparticle deposits, but also as a conductive matrix. The preparation methods of graphene mainly include mechanical exfoliation method, graphite oxide-reduction method, chemical vapor deposition epitaxial growth method, electrochemical method, arc method and other method...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/04
Inventor 陈永崇少坤
Owner HAINAN UNIVERSITY
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