Method for preparing mesoporous carbon powder with high specific surface area

A high specific surface area, mesoporous carbon technology, applied in carbon preparation/purification, etc., can solve the problems of single pore size, difficult to control, complicated process, etc., and achieve the effect of not easy to agglomerate, low equipment requirements, and simple operation

Active Publication Date: 2020-08-25
UNIV OF SCI & TECH BEIJING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to improve the preparation process of the template agent in the preparation of mesoporous carbon by the existing template method. reaction to obtain mesoporous carbon with high specific surface area, thus developing a fast, low-cost, simple and efficient preparation method of mesoporous carbon powder, and the prepared mesoporous carbon has high specific surface area and large pore volume and particle size Uniformity, high purity, good dispersion, controllable pore size and other characteristics, with excellent adsorption and desorption properties for organic naphthalene

Method used

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  • Method for preparing mesoporous carbon powder with high specific surface area
  • Method for preparing mesoporous carbon powder with high specific surface area
  • Method for preparing mesoporous carbon powder with high specific surface area

Examples

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Effect test

Embodiment 1

[0032] Weigh 1.28g magnesium nitrate, 1.488g zinc nitrate, 1.18g calcium nitrate, 1.088g glycine, 0.70g citric acid and 0.56g glucose into a 300ml beaker, and add deionized water to obtain a clear aqueous solution, put the solution in Heating is carried out on the resistance furnace, and the solution combustion synthesis reaction occurs. From the beginning of heating, the solution is heated until the solution is gelled and covered with a rubber stopper. After the reaction, a fluffy precursor can be obtained. Put the precursor into a tube furnace and feed it with Ar to carry out high-temperature carbonization reaction, raise the temperature to 950 °C at a rate of 5 °C / min, keep it for 2 hours, and then cool with the furnace to obtain the intermediate product of MgO / CaO / C, ZnO It reacts with carbon and pyrolyzes Zn simple substance to evaporate at high temperature to create pores on the carbon substrate. Immerse in a prepared beaker of 0.5M excess hydrochloric acid solution, soa...

Embodiment 2

[0034] Take by weighing 1.28g magnesium nitrate, 1.488g zinc nitrate, 3.75g aluminum nitrate, 1.18g calcium nitrate, 1.24g glycine, 1.6g urea and 1.31g starch and put it into a 500ml beaker, and add deionized water to obtain a clarified aqueous solution. The solution is heated on a resistance furnace, and a solution combustion synthesis reaction occurs. From the beginning of heating, the solution is heated until it is gelled and covered with a rubber stopper. After the reaction, a fluffy precursor can be obtained. Put the precursor into a tube furnace and feed it with Ar to carry out high-temperature carbonization reaction, raise the temperature to 1200°C at a rate of 8°C / min, keep it for 1h, and then cool with the furnace to obtain MgO / Al 2 o 3 The intermediate product of / CaO / C, ZnO reacts with carbon and pyrolyzes to Zn elemental high-temperature evaporation to create pores on the carbon substrate. Immerse in a prepared beaker of 1M excess hydrochloric acid solution, soak ...

Embodiment 3

[0036]Weigh 1.18g of calcium nitrate, 3.75g of aluminum nitrate, 1.49g of zinc nitrate, 1.55g of carbohydrazide, 1.328g of citric acid and 0.75g of glucose into a 500ml beaker, and add deionized water to obtain a clear aqueous solution. Put it on a resistance furnace for heating, and a solution combustion synthesis reaction occurs. From the beginning of heating, the solution is heated until it is gelatinous and covered with a rubber stopper. After the reaction, a fluffy precursor can be obtained. Put the precursor into the tube furnace and pass N 2 , carry out high-temperature carbonization reaction, raise the temperature to 1000°C at a rate of 6°C / min, keep it for 3h, and then cool with the furnace to obtain CaO / Al 2 o 3 The intermediate product of / C, ZnO reacts with carbon and pyrolyzes to Zn elemental high-temperature evaporation to create pores on the carbon substrate. Immerse in the prepared 2M excess hydrochloric acid solution beaker, soak and stand for 48 hours, filt...

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Abstract

The invention relates to a method for preparing mesoporous carbon powder with a high specific surface area, and belongs to the technical field of carbon material preparation. The process comprises thefollowing steps: preparing metal nitrate, fuel, a soluble organic carbon source and other raw materials into a solution according to a certain proportion; heating the solution to react to obtain a precursor; calcining the precursor for 1-4 hours in a protective atmosphere at the temperature of 700-1400 DEG C to obtain a metal oxide / carbon intermediate product; and soaking in hydrochloric acid toremove the metal oxide on the carbon matrix, and drying to obtain the mesoporous carbon powder material with high specific surface area. The method is simple in process, easy to control in operation and low in cost, and the prepared mesoporous carbon has high specific surface area, large pore volume, uniform particle size, high purity, good dispersity and controllable pore diameter, and can be effectively applied to the environmental fields of organic pollutant adsorption and the like.

Description

technical field [0001] The invention belongs to the technical field of carbon material preparation, and in particular relates to designing a novel method for preparing mesoporous carbon powder with high specific surface area. Background technique [0002] Carbon materials with mesoporous structure combine the advantages of mesoporous materials and carbon materials, with high specific surface area, low relative density, excellent adsorption performance, high temperature resistance, acid and alkali resistance, large pore volume storage capacity, pore diameter Moderate and adjustable within a certain range, good electrical conductivity and thermal conductivity, etc., have always attracted people's special attention, and have broad application prospects in energy storage, adsorption and separation of organic macromolecules, and catalyst carriers. Along with the application of mesoporous carbon, many synthetic methods have emerged. Compared with other methods, the template method...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05
CPCC01B32/05
Inventor 吴昊阳秦明礼周士棋李子宜王倩玉贾宝瑞曲选辉
Owner UNIV OF SCI & TECH BEIJING
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