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Method for preparing nitrogen-doped carbon material with high specific surface area from phthalimide potassium

A technology of potassium phthalimide and high specific surface area, which is applied in the direction of carbon preparation/purification, products, reagents, etc., which can solve the problems of complex process costs and other problems, and achieve good adsorption characteristics, high specific surface area, and simplified preparation The effect of craft

Active Publication Date: 2020-01-31
INST OF APPLIED CHEM JIANGXI ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these preparation methods all need to use specific substances as activators, the process is more complicated and the activators will also form additional costs

Method used

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  • Method for preparing nitrogen-doped carbon material with high specific surface area from phthalimide potassium
  • Method for preparing nitrogen-doped carbon material with high specific surface area from phthalimide potassium
  • Method for preparing nitrogen-doped carbon material with high specific surface area from phthalimide potassium

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Effect test

Embodiment 1

[0040] The preparation steps of the nitrogen-doped carbon material in this example are as follows: 1 g of potassium phthalimide is placed in a tube furnace, and the temperature of the furnace is raised from room temperature at a rate of 5 °C / min under nitrogen protection (60 ml / min). to 600°C, and heat at 600°C for 1 hour. After natural cooling, the high-temperature-treated product was treated with 10% hydrochloric acid, washed repeatedly with deionized water, and dried at 100° C. for 4 hours to obtain the final product.

[0041] According to the present embodiment, the nitrogen-doped carbon material scanning electron microscope photo prepared by potassium phthalimide is as follows figure 1 As shown, the carbon material presents irregular large blocks, and large pores of different sizes are formed on the surface. The X-ray photoelectron energy spectrum N1s spectrogram of this carbon material is as follows figure 2 As shown, it is proved that nitrogen can be directly doped i...

Embodiment 2

[0043] The preparation steps of the nitrogen-doped carbon material in this example are as follows: 1 g of potassium phthalimide is placed in a tube furnace, and the temperature of the furnace is raised from room temperature at a rate of 5 °C / min under nitrogen protection (60 ml / min). to 900°C, and heat at 900°C for 2 hours. After natural cooling, the high-temperature-treated product was treated with 10% hydrochloric acid, washed repeatedly with deionized water, and dried at 100° C. for 4 hours to obtain the final product.

[0044] According to the present embodiment, the nitrogen-doped carbon material X-ray photoelectron energy spectrum N1s spectrogram prepared by potassium phthalimide is as follows image 3 As shown, due to the harsher carbonization conditions, the nitrogen content is reduced to 3.3wt%; the nitrogen adsorption and desorption isotherm diagram of the carbon material at 77K is shown in Figure 4 As shown, its specific surface area is 2053m 2 / g, the pore volum...

Embodiment 3

[0046]The preparation steps of the nitrogen-doped carbon material in this example are as follows: 1 g of potassium phthalimide is placed in a tube furnace, and the temperature of the furnace is raised from room temperature at a rate of 5 °C / min under nitrogen protection (60 ml / min). to 800°C, and heat at 800°C for 1 hour. After natural cooling, the high-temperature-treated product was treated with 10% hydrochloric acid, washed repeatedly with deionized water, and dried at 100° C. for 4 hours to obtain the final product.

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Abstract

The invention discloses a method for preparing a high-specific-surface-area nitrogen-doped carbon material from phthalimide potassium. The method comprises the following steps: carbonizing phthalimidepotassium at a high temperature, adding hydrochloric acid into an obtained carbonized product for treatment, washing a product obtained after pickling repeatedly with deionized water, and drying to obtain the nitrogen-doped porous carbon material. In-situ activation effect is achieved by using potassium element contained by the carbon material, no activating agent is needed, a developed porous structure is formed through one-step reaction, and the specific surface area of the carbon material can reach 2000 m<2> / g or above; meanwhile, nitrogen doping of the carbon material is realized by utilizing nitrogen element contained in phthalimide potassium; the prepared nitrogen-doped carbon material has a high specific surface area and high porosity, and shows a good adsorption characteristic oncarbon dioxide.

Description

technical field [0001] The invention belongs to the technical field of preparation and application of porous carbon materials, and in particular relates to a method for preparing nitrogen-doped carbon materials with high specific surface area by using potassium phthalimide. Background technique [0002] Fossil energy such as coal and petroleum is the main form of energy today, and its consumption forms a large amount of carbon dioxide, which leads to a continuous increase in the concentration of carbon dioxide in the atmosphere. Although a lot of manpower and material resources have been invested in the development of new clean and environmentally friendly energy at home and abroad, the dominance of fossil energy is still difficult to change in the short term. In this context, it is of great significance to use carbon capture and storage technology to control the continuous rise of carbon dioxide concentration. Using organic amine solution to absorb carbon dioxide is curren...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05
CPCC01B32/05Y02P20/151
Inventor 石劲松崔红敏徐建国晏南富柳跃伟
Owner INST OF APPLIED CHEM JIANGXI ACAD OF SCI
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