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Method for preparing porous graphene-like material from water hyacinth

A technology of water hyacinth and graphene is applied in the field of preparing porous graphene-like materials to achieve the effects of sufficient raw material sources, suitable for large-scale production and environmental protection

Active Publication Date: 2015-04-08
江苏润美新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is aimed at above-mentioned present situation, aims to provide a kind of waste utilization, solves the problem of environmental pollution; The production process is simple

Method used

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  • Method for preparing porous graphene-like material from water hyacinth
  • Method for preparing porous graphene-like material from water hyacinth
  • Method for preparing porous graphene-like material from water hyacinth

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1) Wash the discarded water hyacinth and dry it under vacuum at 80°C for 12 hours.

[0025] 2) Put the dried water hyacinth in 0.1mol / L HCl to acid boil for 1 hour, filter it with suction, and dry it in vacuum at 80°C for 12 hours;

[0026] 3) Put the water hyacinth after vacuum drying in N 2 In the atmosphere, the temperature is raised to 300°C at a rate of 1°C / min for pre-carbonization treatment for 1h;

[0027] 4) Mix the carbonized product after pre-carbonization in step 3) with KOH at a mass ratio of 1:8, and mix thoroughly in N 2 In the atmosphere, the temperature was raised to 400°C at a rate of 1°C / min for 1h, and then cooled to room temperature;

[0028] 5) Wash the sample obtained in step 4) with 0.1 mol / L HCl, then wash with distilled water several times until neutral, and dry the porous graphene-like material at 80°C.

Embodiment 2

[0029] Embodiment 2, with embodiment 1, difference is,

[0030] 2) Place the dried water hyacinth in 1mol / L HCl and acid boil for 3 hours, then suction filter;

[0031] 3) Put the water hyacinth after vacuum drying in N 2 In the atmosphere, pre-carbonize at a rate of 5°C / min at 500°C for 2 hours;

[0032] 4) Mix the carbonized product after pre-carbonization in step 3) with KOH at a mass ratio of 1:1, and mix thoroughly in N 2 In the atmosphere, the temperature was raised to 800°C at a rate of 5°C / min for 2 hours, and then cooled to room temperature;

[0033] 5) Wash the sample obtained in step 4) with 1mol / L HCl, then wash with distilled water several times until neutral, and dry the porous graphene-like material at 80°C.

[0034] The porous graphene-like sheet prepared by this implementation consists of figure 1 The electron micrographs show that the product after high temperature treatment and activation is a lamellar structure. Depend on figure 2 According to the Ra...

Embodiment 3

[0035] Embodiment 3, with embodiment 1, difference is,

[0036] 2) Place the dried water hyacinth in 0.5 mol / L HCl and acid boil for 10 hours, then suction filter;

[0037] 3) Put the water hyacinth after vacuum drying in N 2 Pre-carbonization treatment at 800°C for 3 hours at a rate of 10°C / min in the atmosphere;

[0038] 4) Mix the carbonized product after pre-carbonization in step 3) with KOH at a mass ratio of 1:2, and mix thoroughly in N 2 In the atmosphere, the temperature was raised to 600°C at a rate of 6°C / min for 3 hours, and then cooled to room temperature;

[0039] 5) Wash the sample obtained in step 4) with 3mol / L HCl.

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Abstract

The invention relates to a method for preparing a porous graphene-like material from water hyacinth. The method comprises the following steps: washing water hyacinth, drying, carrying out acid boiling on dried water hyacinth in diluted HCl, carrying out pumping filtration, and carrying out vacuum drying; heating in N2 atmosphere to 300-900DEG C, and pre-carbonizing; mixing a pre-carbonized carbonization product with KOH, heating in N2 atmosphere to 400-1000DEG C, annealing for 1-10h, and cooling to room temperature; and cleaning the obtained sample by the diluted HCl, cleaning with distilled water until the sample is neutral, and drying at 80DEG C to prepare the porous graphene material. Living creature harmful to nature is used as a raw material, is changed to valuables, and is in favor of protecting environment; simple acid boiling and annealing treatment are adopted, and the thickness and the size of acid-boiled graphene flakes are controlled by controlling the acid boiling time and the annealing temperature and rate; and the method has the advantages of full source of the raw material, simplicity, reliability, low cost, and suitableness for large scale production. The graphene-like material obtained in the invention is suitable for fields of electrochemistry, electronic devices and environment.

Description

technical field [0001] The invention relates to a method for preparing a porous graphene-like material by using water hyacinth as a raw material. Background technique [0002] In recent years, materials, especially nanomaterials, have attracted great attention for their great scientific value and application prospects. Theory and research have shown that compared with bulk materials, two-dimensional nanomaterials have better physical and chemical properties. Graphene and graphene-like have been widely used in the fields of electrochemistry, catalysts, and physical adsorption due to their good electronic conductivity and large specific surface area [K.Xie, X.T.Qin, X.Z.Wang, Y.N.Wang, H.S. Tao, Q. Wu, L. J. Yang and Z. Hu, Adv. Mater., 2012, 24, 347–352.]. The graphene-like structure of the porous material provides more electrochemically active sites while ensuring good electrical conductivity, and the holes distributed on the graphene-like sheets provide channels for the el...

Claims

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Application Information

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IPC IPC(8): C01B31/04
Inventor 陈雪阳高标吴凯霍开富徐华星
Owner 江苏润美新材料有限公司
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