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Pomelo valve-based porous activated carbon as well as preparation method and application thereof

A technology of porous activated carbon and valve, which is applied in the field of materials and achieves the effects of simple preparation process, high yield and mild reaction conditions

Inactive Publication Date: 2020-02-21
SOUTHWEST UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are few reports on the application of pomelo valve as a biological precursor in the field of energy

Method used

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  • Pomelo valve-based porous activated carbon as well as preparation method and application thereof
  • Pomelo valve-based porous activated carbon as well as preparation method and application thereof
  • Pomelo valve-based porous activated carbon as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Preparation of Porous Activated Carbon Based on Grapefruit Valve

[0037] Wash and freeze-dry 1 g of pomelo valve, add 30 mL of phosphoric acid aqueous solution with a mass fraction of 85%, and then react in a high-pressure reactor at 120°C for 1 h. The precipitate was centrifuged and washed 3 times with deionized water at a rate of 12000r / m, each time for 15min, then dried at 80°C for 12h and then placed in a tube furnace. Under the protection of nitrogen, the temperature was raised at a rate of 3°C / min Heat it at 200°C for 1 hour, continue to heat up to 400°C at a rate of 3°C / min, hold it for 1 hour, then heat it up to 700°C at a rate of 3°C / min, and hold it for 2 hours to obtain a precursor. The mass fraction is 15% hydrochloric acid and deionized water, which are alternately suction-filtered and washed for 5 times, and then dried at 80°C for 12 hours to prepare porous activated carbon.

Embodiment 2

[0039] Preparation of Porous Activated Carbon Based on Grapefruit Valve

[0040]Wash and freeze-dry 1 g of pomelo valve, add 30 mL of phosphoric acid aqueous solution with a mass fraction of 85%, and then react in a high-pressure reactor at 120°C for 2 hours. The precipitate was centrifuged and washed 4 times with deionized water at a rate of 12000r / m, each time for 10min, then dried at 70°C for 16h and then placed in a tube furnace, under the protection of helium, first at a rate of 4°C / min After raising the temperature to 150°C and keeping it for 2 hours, continue to raise the temperature to 350°C at a rate of 5°C / min and keep it for 2 hours, then raise the temperature to 700°C at a rate of 5°C / min and keep it for 2 hours to obtain a precursor. The porous activated carbon was prepared by alternate suction filtration and washing with 10% hydrochloric acid and deionized water, and then drying at 70°C for 16 hours after alternating four times.

Embodiment 3

[0042] Preparation of Porous Activated Carbon Based on Grapefruit Valve

[0043] Wash and freeze-dry 1 g of pomelo valve, add 30 mL of phosphoric acid aqueous solution with a mass fraction of 85%, and then react in a high-pressure reactor at 120°C for 3 hours. The precipitate was centrifuged and washed 3 times with deionized water at a rate of 12000r / m, each time for 15min, then dried at 80°C for 12h and then placed in a tube furnace. Under the protection of nitrogen, the temperature was raised at a rate of 3°C / min Heat it at 200°C for 1 hour, continue to heat up to 400°C at a rate of 3°C / min, hold it for 1 hour, then heat it up to 700°C at a rate of 3°C / min, and hold it for 2 hours to obtain a precursor. The mass fraction is 15% hydrochloric acid and deionized water, which are alternately suction-filtered and washed for 5 times, and then dried at 80°C for 12 hours to prepare porous activated carbon.

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Abstract

The invention relates to pomelo valve-based porous activated carbon as well as a preparation method and application thereof, and belongs to the technical field of materials, and the method specifically comprises the following steps: cleaning pomelo valves, freeze-drying, adding into a phosphoric acid aqueous solution, carrying out hydrothermal reaction, centrifuging to take a precipitate after thehydrothermal reaction is finished, washing and drying the precipitate, carrying out carbonization treatment to obtain a precursor, removing impurities from the precursor, and drying again to obtain the porous activated carbon. Compared with other biomass-derived carbon materials, the porous activated carbon material has higher specific surface area and capacitance performance, has better electrochemical energy storage performance through detection, is an excellent electrode material, can be further developed and prepared into a supercapacitor, and has potential and wide application prospectsin the field of electrochemical energy storage. The preparation process of the porous activated carbon is simple and easy to operate, mild in reaction condition, convenient in post-treatment, high inyield (20%), low in cost and suitable for expanded production.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a pomelo valve-based porous activated carbon and its preparation method and application. Background technique [0002] The rapid development of the world economy, the increase in the consumption of traditional resources, the increasingly serious environmental pollution and global warming caused by fuel combustion make it very urgent for people to find a clean, efficient and sustainable energy source. Therefore, the production and flexible use of renewable clean energy to replace traditional fossil energy has become a top priority under the current world economic development model. One of the attributes of natural resources is that they are discontinuous, so it is necessary to find corresponding energy storage components, and then to realize the utilization of these natural energy, and the successful development of supercapacitors is a breakthrough in energy storage ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/318
CPCC01B32/318
Inventor 黄静李长明代方银
Owner SOUTHWEST UNIVERSITY
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