Ultrathin graphene and preparation method thereof

A graphene and ultra-thin technology, applied in the field of graphene, can solve the problems of low quality of graphene materials, unsuitable for mass production, complicated process flow, etc., and achieve the effects of simple method, uniform size, and simple process flow

Pending Publication Date: 2020-01-10
FUQING BRANCH OF FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has high resource utilization rate and high yield, but the quality of the prepared graphene material is low and the sheet is thick.
The technological process is complicated, and the elemental metal used is dangerous to a certain extent, and cannot be recycled, so it is not suitable for mass production; the size is uneven, and the sheet is thick

Method used

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  • Ultrathin graphene and preparation method thereof
  • Ultrathin graphene and preparation method thereof
  • Ultrathin graphene and preparation method thereof

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preparation example Construction

[0030] A kind of preparation method of ultrathin graphene is characterized in that, it comprises the following steps:

[0031] S1 raw material mixing: solid organic matter composed of one or more of glucose, citric acid, and fructose in any proportion, and one or more of sodium chloride, potassium chloride, and calcium chloride in any proportion The combined molten salt is uniformly mixed in a weight ratio of 1:5 to 100 to obtain a mixture;

[0032] S2 thermal polymerization reaction: move the obtained mixture to a corundum boat at the bottom of the arc, and place it in a horizontal high-temperature tube furnace. In an inert gas environment composed of the above kinds in any proportion, the temperature is raised to 1000-1400°C at a heating rate of 1-10°C / min for 3-10h, and high-temperature thermal polymerization is carried out to generate graphene.

[0033] The graphene prepared by the present invention has a layer thickness less than 3nm.

Embodiment 1

[0035] The preparation method of graphene, it may further comprise the steps:

[0036] S1 Mixing of raw materials: Mix solid organic matter and molten salt at a weight ratio of 1:50 to obtain a mixture; wherein, the solid organic matter is made by mixing glucose, citric acid, and fructose at a weight ratio of 1:1:1; wherein, the molten salt It is formed by mixing sodium chloride, potassium chloride and calcium chloride at a ratio of 1:1:1 by weight;

[0037] S2 thermal polymerization reaction: move the obtained mixture to a corundum boat at the bottom of the arc, and place it in a horizontal high-temperature tube furnace with a flow rate of 400mL / min in an inert gas environment, and raise the temperature to 1200°C at a rate of 6°C / min Keeping the temperature for 7 hours, performing high-temperature thermal polymerization to generate ultra-thin graphene; wherein, the inert gas is nitrogen, argon, and helium mixed in a ratio of 1:1:1 by weight.

[0038] The graphene prepared in...

Embodiment 2

[0040] The preparation method of ultrathin graphene, it comprises the following steps:

[0041] S1 raw material mixing: glucose and sodium chloride molten salt are uniformly mixed at a weight ratio of 1:5 to obtain a mixture;

[0042] S2 thermal polymerization reaction: move the obtained mixture into a corundum boat at the bottom of the arc, and place it in a horizontal high-temperature tube furnace, and raise the temperature to 1000°C at a rate of 1°C / min under a nitrogen atmosphere with a flow rate of 100mL / min Insulate for 3 hours, and carry out high-temperature thermal polymerization to generate graphene.

[0043] The graphene prepared in this embodiment has a layer thickness of 2 nm.

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Abstract

The invention relates to graphene, in particular to graphene and a preparation method thereof. The preparation method comprises the following steps: uniformly mixing a solid organic matter composed ofglucose, citric acid and fructose, with a molten salt composed of sodium chloride, potassium chloride and calcium chloride according to a weight part ratio of 1: 5-100 to obtain a mixture; and heating to 1000-1400 DEG C at a heating rate of 1-10 DEG C/min in an inert gas environment with a flow rate of 100-800 mL/min, carrying out heat preservation for 3-10 h, and carrying out high-temperature thermal polymerization reaction to generate the ultrathin graphene. According to the method, solid organic matters are used as raw materials for synthesizing the graphene, the mixed metal chloride at the molten state at high temperature is used as a solvent, stacking of carbon sheet layers is inhibited, and finally volatilization is performed to generate the ultrathin and ultralight graphene material.

Description

technical field [0001] The invention relates to a graphene, in particular to a graphene and a preparation method thereof. Background technique [0002] Graphene is a two-dimensional nanosheet carbonaceous material with a honeycomb lattice structure. 2 The hybrid form is connected into a two-dimensional conjugated plane, and the adjacent layers are tightly packed together through the van der Waals interaction between large π bonds. Due to its unique two-dimensional sheet structure and excellent photoelectric properties, it has quickly become a current research hotspot, and has been gradually applied in many fields such as adsorption materials, photothermal materials, batteries and capacitor materials, showing great application prospects. Therefore, the controllable synthesis of graphene is very important. [0003] At present, there are two strategies for the preparation of graphene: "top-down" and "bottom-up". In the "top-down" strategy, the graphite powder is mainly exfol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/184B01J20/20B01J20/30C02F1/28C02F101/30
CPCB01J20/20B01J2220/4806B01J2220/4812C02F1/283C02F2101/308C01B32/184
Inventor 刘欣王锟沅陈益宾卢修强杨金杯
Owner FUQING BRANCH OF FUJIAN NORMAL UNIV
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