Green preparation method of nitrogen-doped graphene

A nitrogen-doped graphene, green technology, applied in graphene, chemical instruments and methods, inorganic chemistry and other directions, to achieve the effect of large specific surface area, uniform structure and controllable, avoiding the use of organic solvents

Active Publication Date: 2020-01-07
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a green preparation method of nitrogen-doped graphene in view of the defects and deficiencies of the existing nitrogen-doped graphene preparation methods

Method used

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  • Green preparation method of nitrogen-doped graphene

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Weigh 11.17g (0.080mol) of choline chloride, 1.81g (0.010mol) of glucose, and 2.40g (0.040mol) of urea, respectively, mix, heat, and shake to form a ternary deep eutectic solvent. The deep eutectic solvent was then transferred to a quartz boat and heated in a tube furnace with N 2 For calcination with protective gas, the temperature program is: increase the temperature at 1°C / min to 800°C, and keep it for 0.5h after reaching the specified temperature. After the tube furnace was naturally cooled to room temperature, 0.58 g of black nitrogen-doped graphene solid was obtained. Cryogenic N 2 Adsorption experiments show that the prepared nitrogen-doped graphene has a specific surface area of ​​140 m 2 / g; Elemental analysis experiments show that the nitrogen content in the prepared nitrogen-doped graphene is 30wt.%.

Embodiment 2

[0030] Weigh 11.17g (0.080mol) of choline chloride, 1.81g (0.010mol) of glucose, and 2.40g (0.040mol) of urea, respectively, mix, heat, and shake to form a ternary deep eutectic solvent. The deep eutectic solvent was then transferred to a quartz boat and heated in a tube furnace with N 2 For calcination with protective gas, the temperature program is: increase the temperature at 2°C / min to 800°C, and keep it for 0.5h after reaching the specified temperature. After the tube furnace was naturally cooled to room temperature, 0.60 g of black nitrogen-doped graphene solid was obtained. Cryogenic N 2 Adsorption experiments show that the prepared nitrogen-doped graphene has a specific surface area of ​​153m 2 / g; Elemental analysis experiments show that the nitrogen content in the prepared nitrogen-doped graphene is 32wt.%.

Embodiment 3

[0032] Weigh 11.17g (0.080mol) of choline chloride, 1.81g (0.010mol) of glucose, and 2.40g (0.040mol) of urea, respectively, mix, heat, and shake to form a ternary deep eutectic solvent. The deep eutectic solvent was then transferred to a quartz boat and heated in a tube furnace with N 2 For calcination with protective gas, the temperature program is: increase the temperature at 5°C / min to 800°C, and keep it for 0.5h after reaching the specified temperature. After the tube furnace was naturally cooled to room temperature, 0.62 g of black nitrogen-doped graphene solid was obtained. Cryogenic N 2 Adsorption experiments show that the prepared nitrogen-doped graphene has a specific surface area of ​​165 m 2 / g; Elemental analysis experiments show that the nitrogen content in the prepared nitrogen-doped graphene is 34wt.%.

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Abstract

The invention relates to the field of inorganic nano-materials, and particularly discloses a green preparation method of nitrogen-doped graphene. The nitrogen-doped graphene is prepared from a component A, a component B and a component C, wherein the component A is an organic salt compound containing a halogen anion, the component B is a monosaccharide compound, and the component C is a nitrogen-containing compound. The preparation method comprises the following steps: S1, mixing the three components A, B and C in proportion, and heating and stirring the obtained mixture to form a ternary eutectic solvent; S2, transferring the eutectic solvent into a high-temperature-resistant vessel, and carrying out high-temperature pyrolysis in a high-temperature furnace in the presence of a protectivegas; and S3, naturally cooling the high-temperature furnace to room temperature to obtain the black nitrogen-doped graphene. The ternary eutectic solvent is a novel green solvent, no organic solvent is needed in the whole process, and a carbon source and a nitrogen source fully contact and interact with each other in the ternary eutectic solvent system, so that the preparation of the nitrogen-doped graphene with a large specific surface area, a high nitrogen content and a uniform and adjustable structure is facilitated.

Description

technical field [0001] The invention belongs to the field of inorganic nanometer materials, and in particular relates to a green preparation method of nitrogen-doped graphene. Background technique [0002] Graphene is a single-layer two-dimensional crystal material, which has been widely used in the fields of catalysis, adsorption separation, optoelectronics and energy storage due to its excellent electrical conductivity, mechanical properties and ultra-high theoretical specific surface area. However, graphene sheets are easy to agglomerate, and the surface is smooth and inert, lacking active sites, so its practical application is greatly limited. Studies have shown that introducing nitrogen heteroatoms in the structure of graphene can change the electronic structure of graphene, thereby greatly improving its chemical activity, so the research on nitrogen-doped graphene has received extensive attention. [0003] The preparation of nitrogen-doped graphene is mainly based on ...

Claims

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Application Information

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IPC IPC(8): C01B32/184
CPCC01B2204/30C01B32/184
Inventor黄宽黄济勇钟富裕张甲寅邓毓麟邹雅婷曾丽花魏月涵朱宇航
OwnerNANCHANG UNIV