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A low-cost method for large-scale preparation of graphene

A graphene, low-cost technology, applied in the field of low-cost and scalable graphene preparation, which can solve the problems of harsh conditions and high cost

Inactive Publication Date: 2016-07-06
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Graphitization is the orderly conversion of thermodynamically unstable carbon atoms from a disordered layer structure to a graphite crystal structure by thermal activation. During the graphitization process, high-temperature heat treatment (above 2000°C) is used to provide energy for atomic rearrangement and structural transformation , so the conditions are harsh and the cost is high

Method used

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  • A low-cost method for large-scale preparation of graphene
  • A low-cost method for large-scale preparation of graphene

Examples

Experimental program
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Effect test

Embodiment 1

[0032] (1) Prepare 0.28MZn(Cl) respectively 2 Aqueous solution 1L, 0.1MV(Cl) 3 1L of aqueous solution is solution A and B;

[0033] (2) Take 0.08mol of extra-grade pure rosin and pre-disperse it in 100ml of absolute ethanol, which is solution C;

[0034] (3) Under the condition of constantly stirring the solution C, add the aqueous solution A and the aqueous solution B dropwise to the solution C at the same time;

[0035] (4) After the dropwise addition, the sample was obtained by adjusting the pH value to 10.0 with a NaOH solution with a mass ratio of 30%; the sample was aged at 70°C for 10 hours;

[0036] (5) Wash the aged sample with deionized water until the pH of the final filtrate = 8, filter, and vacuum-dry the obtained filter cake at a temperature range of 80°C for 5 hours to obtain rosin acid radical-intercalated hydrotalcite;

[0037] (6) Put the abietic acid root-intercalated hydrotalcite in a tube furnace, and calcine it under the protection of argon, raise the ...

Embodiment 2

[0040] (1) Prepare 0.2MMg (NO 3 ) 2 1L of aqueous solution, 0.05MFe(NO 3 ) 3 1L of aqueous solution is solution A and B;

[0041] (2) Take 0.032mol of sodium succinate and pre-disperse it in 100ml of distilled water, which is solution C;

[0042] (3) Under the condition of constantly stirring the solution C, add the aqueous solution A and the aqueous solution B dropwise to the solution C at the same time;

[0043] (4) After the dropwise addition, the sample was obtained by adjusting the pH value to 10.0 with a NaOH solution with a mass ratio of 30%; the sample was aged at 60°C for 14 hours;

[0044](5) Wash the aged sample with deionized water until the final filtrate pH = 7, filter, and vacuum-dry the obtained filter cake at a temperature range of 60°C for 5 hours to obtain succinate intercalated hydrotalcite;

[0045] (6) Place the succinate intercalated hydrotalcite in a tube furnace, calcinate it under the protection of helium, raise the temperature to 900°C, then cal...

Embodiment 3

[0048] (1) Prepare 0.3MNi(Cl) respectively 2 Aqueous solution 1L, 0.15MAl(Cl) 3 1L of aqueous solution is solution A and B;

[0049] (2) Take 0.12mol of sodium stearate and pre-disperse it in 100ml of distilled water, which is solution C;

[0050] (3) Under the condition of constantly stirring the solution C, add the aqueous solution A and the aqueous solution B dropwise to the solution C at the same time;

[0051] (4) After the dropwise addition, adjust the pH value to 9.0 with a NaOH solution with a mass ratio of 30% to obtain a sample; place the sample at 90°C for 8 hours;

[0052] (5) Wash the aged sample with deionized water until the pH of the final filtrate is 7, filter, and vacuum-dry the obtained filter cake at a temperature range of 100°C for 3 hours to obtain stearate-intercalated hydrotalcite;

[0053] (6) Put the stearate-intercalated hydrotalcite in a tube furnace, calcinate it under the protection of nitrogen, raise the temperature to 1200°C, then calcinate a...

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Abstract

The invention discloses a low-cost and large-scale method for preparing graphene, comprising the following steps: using organic anions as carbon source materials, inserting the organic anions into the interlayers of layered inorganic hydrotalcites to obtain organic anion intercalated hydrotalcites, Use this as a precursor; use the thermal insulation effect of the confinement space between the layers of the hydrotalcite plate, calcinate the organic anion intercalated hydrotalcite at a lower temperature and under the protection of an inert gas, so that the organic anion between the layers is decomposed, and then carbonized, Graphitization, at the same time, the hydrotalcite plate collapses to form metal oxides; after acid washing to remove metal oxides, filter and ultrasonically disperse in ethanol solution to obtain graphene dispersion; the dispersion is then freeze-dried to obtain a highly fluffy graphene powder. The invention has low cost and mild preparation conditions, and can realize pollution-free and efficient large-scale production of graphene under the condition of ensuring the purity.

Description

technical field [0001] The invention belongs to the technical field of new materials, and in particular relates to a low-cost and large-scale preparation method of graphene. technical background [0002] Graphene, as a new type of two-dimensional nanomaterial, is the only two-dimensional free-state atomic crystal discovered so far. it consists of sp 2 Carbon six-membered rings composed of hybrid carbon atoms are arranged in a two-dimensional periodic honeycomb lattice structure. It is the thinnest but hardest nanomaterial in the world. It has excellent electrical and thermal conductivity, making it suitable for use in solar cells. , transparent electrodes, supercapacitors and storage materials have broad application prospects. The large-scale preparation of high-quality graphene materials has important scientific and technological value for the research on the intrinsic physical and chemical properties of graphene and its application research. At present, the method of pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/04
Inventor 陈鸿凌启淡章文贡高慧
Owner FUJIAN NORMAL UNIV