Nitrogen-doped carbon material, and preparation method and application thereof

A nitrogen-doped carbon and nitrogen content technology, applied in chemical instruments and methods, physical/chemical process catalysts, oxidized water/sewage treatment, etc., can solve the complex preparation method of nitrogen-doped carbon materials and the limited ability to degrade organic pollutants , the problem of high cost, to achieve the effect of easy availability, good reactivity, and short time-consuming

Active Publication Date: 2019-04-19
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0005] Aiming at the above defects or improvement needs of the prior art, the present invention provides a nitrogen-doped carbon material, its preparation and application, which uses glucose as a raw material and melamine as a nitrogen source, and first calcines the glucose to a certain level under an inert atmosphere. The carbon substrate is prepared at high temperature, and then the fired carbon substrate and melamine are mixed in an aqueous solution in a certain proportion, then heated and stirred, dried and then calcined at a low temperature under an inert atmosphere, and nitrogen-doped carbon can be obtained after completion material, the preparation method is simple, less energy consumption and low cost, the nitrogen-doped carbon material exhibits high reactivity, can selectively degrade a variety of organic pollutants, thereby solving the problem of the preparation of nitrogen-doped carbon materials in the prior art The method is complicated, the cost is high, and the technical problems of limited ability to degrade organic pollutants in the environment

Method used

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  • Nitrogen-doped carbon material, and preparation method and application thereof
  • Nitrogen-doped carbon material, and preparation method and application thereof
  • Nitrogen-doped carbon material, and preparation method and application thereof

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preparation example Construction

[0031] The invention provides a method for preparing a nitrogen-doped carbon material, comprising the following steps:

[0032] (1) Calcining glucose at 700-1100° C., preferably 950-1100° C., particularly preferably 1000° C., for 60-240 minutes, preferably 120-180 minutes, particularly preferably 120 minutes, in a non-oxygen-containing atmosphere to carbonize the glucose (deoxydehydrogenation) to obtain a carbon substrate.

[0033] (2) The carbon substrate obtained in step (1) and melamine are mixed in an aqueous solution according to a mass ratio of 1:(0.5~3), preferably 1:(0.5~1), especially preferably 1:1, and heated and stirred , after drying at 300°C to 700°C, preferably 500°C to 600°C, particularly preferably 550°C under non-oxygen-containing atmosphere conditions; calcining for 60min to 240min, preferably 120min to 240min, particularly preferably 240min, to obtain nitrogen doped carbon material. Non-oxygen atmosphere such as nitrogen, argon or other inert gases.

[0...

Embodiment 1

[0040] An efficient method for preparing nitrogen-doped carbon materials, the method for preparing nitrogen-doped carbon materials in this embodiment includes the following specific steps:

[0041] (1) Preparation of carbon substrate

[0042] Put 10 g of glucose into a tube furnace and calcinate at 1000° C. for 120 min under the protection of nitrogen to obtain a carbon substrate.

[0043] (2) Nitrogen-doped carbon materials

[0044] Mix the material obtained in (1) and melamine in an aqueous solution at a mass ratio of 1:1, then heat and stir, dry and put it in a tube furnace for 240 minutes under the protection of nitrogen at 550°C to obtain nitrogen-doped Carbon material, the nitrogen doping amount of the material is about 2% to 3%.

[0045] Carry out result analysis according to the catalyst prepared by described embodiment:

[0046] figure 1 : Infrared spectra of carbon substrates and nitrogen-doped carbon materials

[0047] From the infrared spectrum figure 1 It ca...

Embodiment 2

[0059] (1) Preparation of carbon substrate

[0060] Put 10 g of glucose into a tube furnace and calcinate at 1000° C. for 120 min under the protection of nitrogen to obtain a carbon substrate.

[0061] (2) Nitrogen-doped carbon materials

[0062] The material obtained in (1) and melamine are mixed in the aqueous solution at a mass ratio of 2:1, then heated and stirred, dried, put into a tube furnace and calcined for 240min under the protection of nitrogen at 550°C to prepare nitrogen-doped Carbon material, the nitrogen doping amount of the material is about 0.5%-2%.

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Abstract

The invention belongs to the field of carbon materials, and concretely relates to a nitrogen-doped carbon material, and a preparation method and an application thereof. The prearatio method comprisesthe following steps: calcining glucose used as a raw material in an inert atmosphere using melamine used as a nitrogen source to a certain temperature to obtain a carbon substrate, mixing the carbon substrate with melamine in an aqueous solution according to a certain ratio, performing heating and stirring, drying the obtained material, and calcining the dried material in the inert atmosphere at alow temperature in order to obtain the nitrogen-doped carbon material. The preparation method has the advantages of simplicity, low energy consumption and low cost, and the nitrogen-doped carbon material has a very high reactivity, and can selectively degrade a plurality of organic pollutants, so the technical problems of complexity and high cost of preparation methods of the nitrogen-doped carbon material in the prior art and the technical problem of limited ability to degrade the organic pollutants in the environment are solved.

Description

technical field [0001] The invention belongs to the field of carbon materials, and more specifically relates to a nitrogen-doped carbon material, its preparation and application. Background technique [0002] Carbon materials are the most widely studied and applied inorganic non-metallic materials. The properties of carbon materials mainly depend on their raw materials, internal structure and surface activity. Among them, surface activity is considered to be the most important influencing factor. Therefore, the modification of carbon materials is often through activation or surface functionalization to change their surface activity, thereby affecting the overall performance and use. In 2009, the research of LIM S and YOON.S.H showed that: the traditional modification method only treats the surface of carbon materials, and does not significantly benefit its overall performance. [0003] Compared with traditional modification methods, heteroatom doping can significantly impr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C02F1/72C02F101/30C02F101/34
CPCB01J27/24C02F1/722C02F1/725C02F2101/30C02F2101/345
Inventor 张延荣张玉
Owner HUAZHONG UNIV OF SCI & TECH
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