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Preparation method of nitrogen-doping ordered mesoporous carbon materials

A mesoporous carbon and nitrogen doping technology, which is applied in the preparation/purification of carbon, etc., can solve the problems of affecting performance, low doping amount of nitrogen-doped ordered carbon materials, etc., and achieve high mesopority and doping amount High, large specific surface area effect

Inactive Publication Date: 2013-05-01
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nitrogen-containing organic compounds such as aniline, pyrrole, and quinoline have been used as precursors to prepare nitrogen-doped ordered carbon materials. is not high, thus affecting its final performance

Method used

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  • Preparation method of nitrogen-doping ordered mesoporous carbon materials
  • Preparation method of nitrogen-doping ordered mesoporous carbon materials
  • Preparation method of nitrogen-doping ordered mesoporous carbon materials

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Take 5.0 g of sucrose, dissolve it in 60 mL of concentrated ammonia water, place the solution in a polytetrafluoroethylene-lined hydrothermal reaction kettle, react at 160 °C for 24 hours, and dry at 120 °C for 24 hours to obtain the precursor. The nitrogen content is 18.9%. Take 1.0 g of the above precursor, dissolve it in 2.0 g of absolute ethanol, add it dropwise on the surface of SBA-15 mesoporous molecular sieve at room temperature, and dry it under vacuum at 80 °C for 6 hours. Repeat the above steps, the amount of precursor is 0.8 g, and the amount of absolute ethanol is 1.6 g, to obtain the precursor / SBA-15 molecular sieve composite. The above compound was placed in an atmosphere tube furnace, and under the protection of argon, the temperature was raised to 350 °C at a rate of 1 °C / min, calcined for 2 hours, and then heated to 950 °C at a rate of 2 °C / min, and pyrolyzed for 2 hours. Cool to room temperature under the protection of argon atmosphere, soak in 30 mL...

Embodiment 2

[0024] Take 5.0 g of sucrose, dissolve it in 50 mL of concentrated ammonia water, place the solution in a polytetrafluoroethylene-lined hydrothermal reaction kettle, react at 180 °C for 18 hours, and dry at 120 °C for 24 hours to obtain the precursor. The nitrogen content is 17.4%. Take 1.0 g of the above precursor, dissolve it in 2.0 g of absolute ethanol, add it dropwise on the surface of SBA-15 mesoporous molecular sieve at room temperature, and dry it under vacuum at 80 °C for 6 hours. Repeat the above steps, the amount of precursor is 0.8 g, and the amount of absolute ethanol is 1.6 g, to obtain the precursor / SBA-15 molecular sieve composite. The above compound was placed in an atmosphere tube furnace, and under the protection of argon, the temperature was raised to 375 °C at a rate of 1.5 °C / min, calcined for 2 hours, and then heated to 800 °C at a rate of 3.5 °C / min, and pyrolyzed for 2 hours. Cool to room temperature under the protection of argon atmosphere, soak in 3...

Embodiment 3

[0027] Take 5.0 g of sucrose, dissolve it in 40 mL of concentrated ammonia water, place the solution in a polytetrafluoroethylene-lined hydrothermal reaction kettle, react at 200 °C for 12 hours, and dry at 120 °C for 24 hours to obtain the precursor. The nitrogen content is 16.7%. Take 1.0 g of the above precursor, dissolve it in 2.0 g of absolute ethanol, add it dropwise on the surface of SBA-15 mesoporous molecular sieve at room temperature, and dry it under vacuum at 80 °C for 6 hours. Repeat the above steps, the amount of precursor is 0.8 g, and the amount of absolute ethanol is 1.6 g, to obtain the precursor / SBA-15 molecular sieve composite. The above compound was placed in an atmosphere tube furnace, and under the protection of argon, the temperature was raised to 400 °C at a rate of 2 °C / min, calcined for 2 hours, and then heated to 650 °C at a rate of 5 °C / min, and pyrolyzed for 2 hours. Cool to room temperature under the protection of argon atmosphere, soak in 5% HF...

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Abstract

The invention provides a preparation method of nitrogen-doping ordered mesoporous carbon materials. According to the method, rich-hydroxyl saccharide carbohydrate is used as carbon sources, ammonia water is used as nitrogen sources, amination reaction under the hydrothermal condition is adopted for preparing rich-nitrogen precursors, mesoporous silica molecular sieves SBA-15 (space group P6mm) are used as templates, and the nitrogen-doping ordered mesoporous carbon materials in two-dimensional orthohexagonal ordered mesostructures are prepared through multi-time wetting combined with the high-temperature themolysis technology.

Description

technical field [0001] The invention relates to a nitrogen-doped ordered mesoporous carbon material and a preparation method thereof. Background technique [0002] Ordered mesoporous carbon (OMC) is a new type of carbon material that emerged in the 1990s, and there are mesoporous channels with uniform pore size in its structure. Compared with traditional porous carbon materials, ordered mesoporous carbon has the advantages of narrow pore size distribution, high porosity, and controllable pore size, and has broad application prospects in catalyst supports, hydrogen storage materials, adsorption separation, and electrode materials. . Its highly ordered structure can also be used to synthesize mesoporous zeolite molecular sieves and mesoporous transition metal oxides. Therefore, the preparation and application research of ordered mesoporous carbon materials has become the frontier and hotspot of current research on porous carbon materials. [0003] Recent studies have shown ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02C01B32/05
Inventor 张德懿马颖郝远郑力文冯辉霞
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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