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A kind of doped carbon material and preparation method thereof

A carbon material and ball milling technology, which is applied in the preparation of amino compounds, chemical instruments and methods, catalyst activation/preparation, etc., can solve the problems of harsh preparation conditions and expensive raw materials, and achieve simple preparation process, simple preparation and high yield Effect

Active Publication Date: 2020-03-27
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It has been reported (Yangming Line al. Chem. Commun., 2015, 51, 13086-13089) that boron-doped graphene was prepared by heat treatment with diamond and boric acid at 1500°C. The catalytic effect is excellent, but the raw materials are expensive and the preparation conditions are harsh.

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  • A kind of doped carbon material and preparation method thereof
  • A kind of doped carbon material and preparation method thereof
  • A kind of doped carbon material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] This embodiment provides a doped carbon material, which is prepared by the following steps:

[0035] Ball mill the graphite at 750 rpm for 48 hours to obtain ball milled graphite;

[0036] Weigh 2g of ball-milled graphite and immerse it in 80mL of ethanol, add 10g of boric acid, and stir through ultrasonic to obtain a mixture;

[0037] Place the mixture in a heating device at 80°C to remove ethanol to obtain a solid phase mixture;

[0038] Put the solid phase mixture into a horizontal tube furnace, calcinate at 900°C for 2h in a nitrogen atmosphere, and take it out after cooling to room temperature;

[0039] The calcined product was washed with warm water at 60° C.-100° C. and dried in an oven to obtain 1.75 g of doped carbon material with a yield of 88%.

[0040] The above-mentioned doped carbon material of this embodiment is analyzed by XPS, such as figure 1 Shown. figure 1 It can be seen that there is boron in the doped carbon material, and the boron content is 3.92at%.

[0041]...

Embodiment 2

[0047] This embodiment provides a doped carbon material, which is prepared by the following steps:

[0048] Ball mill the graphite at 750 rpm for 48 hours to obtain ball milled graphite;

[0049] Weigh 2g of ball-milled graphite and immerse it in 80mL of ethanol, add 10g of boric acid, and stir through ultrasonic to obtain a mixture;

[0050] Place the mixture in a heating device at 80°C to remove ethanol to obtain a solid phase mixture;

[0051] Put the solid phase mixture into a horizontal tube furnace, calcinate at 1000°C for 2h under a nitrogen atmosphere, and take it out after cooling to room temperature;

[0052] The calcined product was washed with warm water at 60-100° C. and dried in an oven to obtain 1.64 g of doped carbon material with a yield of 82%.

[0053] The above-mentioned doped carbon material of this embodiment is analyzed by XPS, such as Figure 5 Shown. Figure 5 It can be seen that there is boron in the doped carbon material, and the boron content is 9.65 at%.

[...

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Abstract

The invention provides a doped carbon material and a preparation method thereof. The preparation method of the doped carbon material comprises the steps that ball-milled graphite is impregnated in a solvent, and a boron source is added to obtain a mixture, wherein 2 g of ball-milled graphite is dissolved in 100-200 mL of solvent, and the mass ratio of the boron source to the ball-milled graphite is 10 to 1-0.5; the mixture is heated to 60-100 DEG C to obtain a solid-phase mixture; under inert gas atmosphere and at the temperature of 600-1000 DEG C, the solid-phase mixture is calcined, and the calcining time is 60-500 minutes, and washing and drying are performed to obtain the doped carbon material. The invention further provides the doped carbon material obtained by adopting the preparation method. The preparation method of the doped carbon material is simple and easy to operate, the process cost is low, and the prepared doped carbon material has excellent nitrobenzene catalyzing performance.

Description

Technical field [0001] The invention relates to a carbon material and a preparation method thereof, in particular to a carbon material doped with heteroatoms and a preparation method thereof, and belongs to the technical field of graphite materials. Background technique [0002] Graphene is an "ideal" two-dimensional planar structure with the thickness of a single carbon atom. Near its Fermi surface, the relationship between energy and momentum can be approximated as a linear relationship. Therefore, the electrons in graphene are called Dirac-Fermions (Dirac -Fermion). This dispersion relationship also leads to the continuous conversion of carrier energy between electrons and holes, which determines the properties of graphene's "zero band gap" semiconductor. Graphene's high mobility, room temperature quantum Hall effect, high thermal conductivity and high transmittance to visible light are all related to its special energy band structure, which gives graphene a variety of novel ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/18C07C209/36C07C211/46
CPCB01J21/18B01J37/0036B01J37/0207B01J37/08C07C209/325C07C211/46
Inventor 杨帆曹炎陈卓李永峰
Owner CHINA UNIV OF PETROLEUM (BEIJING)