Preparation method of mesoporous carbon material with high specific surface area

A high specific surface area, porous carbon technology, which is applied in the field of preparation of high specific surface area mesoporous carbon materials, can solve the problems that it is difficult to meet high specific surface area at the same time, the template agent cannot be reused, and the economy is poor.

Inactive Publication Date: 2010-03-31
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Based on the above documents and patents, it can be found that the mesoporous carbon prepared by the template method has an orderly and regular pore structure, but the adjustment of the pore structure depends on the synthesis of the template agent, the process is cumbersome, the preparation cycle is long, and the template The agent cannot be reused, and the economy is poor, so it is not conducive to the realization of industrialization
[0007] To sum up, the various methods reported in the literature have shortcomings, such as: it is difficult to meet the requirements of high specific surface area, large pore size, large pore volume and narrow pore size distribution at the same time, and the cost is too high to be practically applied

Method used

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  • Preparation method of mesoporous carbon material with high specific surface area
  • Preparation method of mesoporous carbon material with high specific surface area

Examples

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Embodiment 1

[0022]Example 1 Dissolve 10g of glucose, 1g of resorcinol and 1g of ferrous chloride in water, then transfer to 85°C oil bath or water bath, heat and stir, hydrolyze and polymerize for about 0.5h to obtain a black viscous mixture, take out Dry and solidify in an oven at 180°C for 0.1h to obtain a black solid. Transfer the black solid to a carbonization furnace, raise the temperature to 350°C in flowing helium, carbonize at a constant temperature for 0.5h, cool to room temperature, and take out the carbonized solid product. Boil with dilute hydrochloric acid and distilled water, filter and wash several times while hot, until the filtrate is tested with silver nitrate solution to detect the presence of no chloride ions, and then dry to obtain the mesoporous carbon product. Its specific surface area is 513m 2 / g, total pore volume 1.2cm 3 / g, the average pore diameter is 2.3nm, and the mesoporosity is 85%.

Embodiment 2

[0023] Example 2 Dissolve 10g fructose, 0.1g phenol and 12g cobalt chloride in water, then transfer to 82°C oil bath or water bath, heat and stir, hydrolyze and polymerize for 3 hours to obtain a black viscous mixture, take it out and put it in an oven at 115°C Dry and solidify in medium for 0.5h to obtain a black solid. Transfer the black solid to a carbonization furnace, raise the temperature to 380°C in a flowing argon atmosphere, carbonize at a constant temperature for 1h, cool to room temperature, take out the carbonized solid product, and wash with dilute hydrochloric acid and distilled water successively. Boil, filter and wash several times while hot, until the filtrate is tested with silver nitrate solution to detect the presence of no chloride ions, and dry to obtain the mesoporous carbon product. Its specific surface area is 995m 2 / g, total pore volume 1.7cm 3 / g, the average pore diameter is 3.5nm, and the mesoporosity is 92%.

Embodiment 3

[0024] Example 3 Dissolve 10g of white sugar, 3g of methyl phenol and 5g of nickel chloride in water, then transfer to an 85°C oil bath or water bath for heating and stirring, hydrolysis and polymerization for 2 hours to obtain a brown-black viscous mixture, take it out and put it in 125 Dry and solidify in an oven at ℃ for 1 hour to obtain a black solid. Transfer the black solid to a carbonization furnace, heat up to 400°C in a flowing nitrogen atmosphere, carbonize at a constant temperature for 1.5 hours, and cool to room temperature; take out the carbonized solid product, and use dilute hydrochloric acid and Boil in distilled water, filter and wash several times while it is hot, until the filtrate is tested with silver nitrate solution to detect the presence of no chloride ions, and dry to obtain the mesoporous carbon product. Its specific surface area is 835m 2 / g, total pore volume 1.4cm 3 / g, the average pore diameter is 3.8nm, and the mesoporosity is 90%.

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Abstract

The invention relates to a preparation method of a mesoporous carbon material with a high specific surface area, which comprises the following steps: using carbohydrates, phenolic compounds and metalchlorides as raw materials for hydrolysis and polymerization reaction, and then, carrying out the steps of drying, curing, carbonizing, washing, baking and the like to prepare the mesoporous carbon material. The invention has rich raw material sources, low cost and simple and easy preparation method. The prepared mesoporous carbon material has the characteristics that the specific surface area is500-2500m<2> / g, the total pore volume is 1.0-3.0cm<3> / g, and the mesoporous ratio is 80-100%. The invention can be probably applied to the fields of adsorbents, catalyst carriers, electrode materials,and the like.

Description

technical field [0001] The invention provides a method for preparing a mesoporous carbon material with a high specific surface area. The technology uses carbohydrates, phenolic compounds and metal chlorides as raw materials, and undergoes hydrolysis, polymerization, drying and solidification, carbonization, water washing and drying to obtain powdery mesoporous carbon materials. Porous carbon belongs to the field of porous materials and new carbon materials. technical background [0002] Porous carbons have high specific surface area and well-developed pores, and are widely used as adsorbents, catalyst supports, electrode materials for batteries and supercapacitors, etc. Among these fields, activated carbon is the most common and widely used. A large number of studies have shown that the main factors affecting the performance of porous carbon are specific surface area, pore volume and pore size distribution. In the early research, it was believed that the larger the specifi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02
Inventor 沈俭一左宋林黄玉安胡胜华徐铮傅玉川
Owner NANJING UNIV
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