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A kind of preparation method of two-dimensional thin layer carbon

A thin-layer, carbon precursor technology, applied in the direction of nano-carbon, can solve the problems of increased production cost, complex process, environmental pollution, etc., and achieve the effect of low cost, simple preparation conditions, and environmental friendliness

Active Publication Date: 2021-11-26
GUANGDONG UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These methods all require relatively high experimental equipment, the preparation process is cumbersome, and may also involve the use of dangerous gases, thus increasing the production cost and bringing some unnecessary environmental pollution
[0005] Although there are many methods for preparing two-dimensional thin-layer carbon in the prior art, these preparation methods all have their shortcomings. Some preparation reaction temperatures are high, some preparation costs are high and the process is complicated, and some preparation processes are more serious to environmental pollution.

Method used

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  • A kind of preparation method of two-dimensional thin layer carbon
  • A kind of preparation method of two-dimensional thin layer carbon
  • A kind of preparation method of two-dimensional thin layer carbon

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[0031] The invention provides a method for preparing two-dimensional thin-layer carbon, comprising: S1) mixing inorganic salts, carbon precursors and water to obtain a mixed solution; S2) evaporating and crystallizing the mixed solution, and calcining in an inert atmosphere , to obtain two-dimensional thin-layer carbon.

[0032] The present invention has no special limitation on the sources of all raw materials, which can be commercially available.

[0033] Wherein, the inorganic salt is an inorganic salt well-known to those skilled in the art, and there is no special limitation. In the present invention, it is preferably an alkali metal inorganic salt and / or an inorganic ammonium salt, more preferably potassium sulfate, sodium sulfate, sulfuric acid One or more of lithium, ammonium sulfate, sodium chloride, potassium chloride and ammonium chloride, more preferably potassium sulfate and / or potassium chloride.

[0034] The carbon precursor can be an organic carbon precursor we...

Embodiment 1

[0044] 1.1 Dissolve 4g of potassium sulfate in 40ml of deionized water, stir for 30min, then add dropwise 2ml of prepared 25wt% polyacrylic acid solution and stir for 12h to form a mixed clear solution and put it in a 200ml beaker.

[0045] 1.2 Put the mixed clear solution obtained in step 1.1 in a constant temperature and humidity chamber with a temperature of 25°C and a humidity of 50% to evaporate and crystallize until it is completely precipitated.

[0046] 1.3 Calcinate the crystalline material in step 1.2 in a tube furnace with an argon atmosphere at 700 °C and a heating rate of 2 °C / min for 2 h, then wash off the remaining potassium sulfate with deionized water, filter, and dry in vacuum to obtain the two Dimensional thin layer carbon.

[0047] The prepared carbon thin layer has a thickness of 2-10nm.

[0048] Utilize the low power scanning electron microscope to analyze the two-dimensional thin layer carbon obtained in embodiment 1, obtain the low power scanning electro...

Embodiment 2

[0052] 2.1 Dissolve 4g of potassium sulfate in 40ml of deionized water, stir for 30min, then add dropwise 2ml of the prepared 25wt% polyacrylic acid solution and stir for 12h to form a mixed clear solution and put it in a 200ml beaker.

[0053] 2.2 Put the mixed clear solution obtained in step 2.1 in a constant temperature and humidity chamber with a temperature of 40° C. and a humidity of 50% to evaporate and crystallize until it is completely precipitated.

[0054] 2.3 Calcinate the crystalline product in step 2.2 in a tube furnace with an argon atmosphere at 700°C and a heating rate of 2°C / min for 2 hours, then wash off the remaining potassium sulfate with deionized water, filter, and dry in vacuum to obtain the two Dimensional thin layer carbon.

[0055] The thickness of the prepared carbon thin layer is 5-20nm.

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Abstract

The invention provides a method for preparing two-dimensional thin-layer carbon, comprising: S1) mixing inorganic salts, carbon precursors and water to obtain a mixed solution; S2) evaporating and crystallizing the mixed solution, and calcining in an inert atmosphere , to obtain two-dimensional thin-layer carbon. Compared with the prior art, the present invention is based on the principle of biomimetic, utilizes the self-assembly of inorganic salts in the slow evaporation process to form an ordered layer structure, so that the carbon precursors are evenly distributed in the gap between layers or the inorganic salts The surface of the layer is calcined and carbonized to obtain a two-dimensional thin layer of carbon. The preparation conditions are simple, the cost is low, and the environment is friendly.

Description

technical field [0001] The invention belongs to the technical field of carbon materials, and in particular relates to a preparation method of two-dimensional thin-layer carbon. Background technique [0002] Carbon materials have good physical and chemical stability, electrical conductivity and other advantages, and are widely used in energy, catalysis, biomedicine and other fields. With the continuous deepening of research on carbon materials, especially the discovery of graphene, two-dimensional carbon nanomaterials have gradually attracted people's attention. Two-dimensional carbon nanomaterials refer to carbon materials that have only one dimension in the nanometer size range and present a sheet structure. Two-dimensional carbon nanomaterials have the advantages of large specific surface area, stable physical and chemical properties, and very strong mechanical properties, and can be widely used in catalysis, energy, communications, and electronic components. Typical two...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/15
CPCC01B32/15
Inventor 王诚文施志聪刘军罗锴张伟清黄蔼琪黄世游
Owner GUANGDONG UNIV OF TECH