Soybean-based carbon quantum dot and porous carbon material as well as preparation method therefor and application thereof

A carbon quantum, soybean-based technology, applied in the field of material science, can solve the problem of underutilization of biomass, and achieve the effect of being conducive to large-scale production, wide application and large capacity

Inactive Publication Date: 2015-11-18
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the current research, most studies only focus on the preparation of a single carbon material, which often produces a part of waste, resulting in the underutilization of biomass.

Method used

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  • Soybean-based carbon quantum dot and porous carbon material as well as preparation method therefor and application thereof
  • Soybean-based carbon quantum dot and porous carbon material as well as preparation method therefor and application thereof
  • Soybean-based carbon quantum dot and porous carbon material as well as preparation method therefor and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Put the crushed soybeans into a boat-shaped sample tank, place it in an atmosphere tube furnace, evacuate the furnace, and carry out low-temperature carbonization in an argon atmosphere, and the flow rate of argon is 0.5L / min , the heating rate is 5°C / min, the temperature is raised to 200°C, and the treatment time is 3h. Then the carbonized product under the condition is dispersed in water, soaked and stirred for 3 hours, centrifuged to obtain supernatant and sediment residue, and the supernatant is filtered with a microporous membrane to obtain soybean-based carbon quantum dot aqueous dispersion.

[0034] (2) The precipitate residue was dried in an oven at 80°C for 6h, and the dried residue was carbonized at 750°C for 1.5h in an argon atmosphere, the gas flow rate was 0.5L / min, and the heating rate was 5°C / min. The obtained product was washed 5 times with 2M hydrochloric acid, then washed with water until neutral, and dried at 80° C. for 12 hours to obtain a soybea...

Embodiment 2

[0037] (1) Put the crushed soybeans into a boat-shaped sample tank, place it in an atmosphere tube furnace, evacuate the furnace, and carry out low-temperature carbonization in an argon atmosphere, and the flow rate of argon is 0.5L / min , the heating rate is 5°C / min, the temperature is raised to 200°C, and the treatment time is 3h. Then the carbonized product under this condition is dispersed in water, soaked and stirred for 3 hours, centrifuged to obtain the supernatant and sediment residue, the supernatant is filtered with a microporous membrane, and then further dialyzed with a 500 dialysis bag to obtain soybean Based carbon quantum dot aqueous dispersion.

[0038] (2) Dry the precipitate residue in an oven at 80°C for 6h, mix the dried residue with KOH solid at a mass ratio of 0.5:1, soak in water for 10h, and then dry at 100°C. The dried sample was put into a boat-shaped sample tank, and carbonized at 750 °C for 1.5 h in an argon atmosphere, with a gas flow rate of 0.5 L...

Embodiment 3

[0042](1) Put the crushed soybeans into a boat-shaped sample tank, place it in an atmosphere tube furnace, evacuate the furnace, and carry out low-temperature carbonization in an argon atmosphere, and the flow rate of argon is 0.5L / min , the heating rate is 5°C / min, the temperature is raised to 300°C, and the processing time is 3h. Then the carbonized product under this condition is dispersed in water, soaked and stirred for 5 hours, centrifuged to obtain the supernatant and sediment residue, the supernatant is filtered with a microporous membrane, and further dialyzed with a 500 dialysis bag to obtain soybean Based carbon quantum dot aqueous dispersion.

[0043] (2) Dry the precipitate residue in an oven at 80°C for 6h, mix the dried residue with KOH solid at a mass ratio of 1:1, soak in water for 10h, and then dry at 100°C. Put the dried sample into the boat-shaped sample tank, and in the atmosphere of argon, first carbonize at 300°C for 1h, the heating rate is 5°C / min, the...

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Abstract

The invention belongs to the field of material science and discloses soybean-based carbon quantum dot and porous carbon material as well as a preparation method therefor and an application thereof. The method comprises the following steps of: (1) performing low-temperature carbonization treatment on ground soybeans in an inert gas atmosphere; (2) performing water soaking, stirring and separation on a low-temperature carbonization product to obtain supernatant liquor and precipitates; and (3) further purifying the supernatant liquor to obtain soybean-based carbon quantum dots. According to the method, a "two-step carbonization method" is adopted, the carbon quantum dots are prepared through low-temperature carbonation first, and then residues are further subjected to high-temperature carbonization to prepare a porous carbon material, so that double purposes are achieved; and the prepared soybean-based carbon quantum dots and porous carbon material are excellent in performance and wide in application range, and efficient utilization of biomass resources is realized.

Description

technical field [0001] The invention relates to a soybean-based carbon quantum dot, a porous carbon material and a preparation method thereof, and applies the prepared porous carbon material to a supercapacitor, belonging to the field of material science. Background technique [0002] With the decrease of non-renewable resources such as petroleum, the development of various bio-based products using renewable biomass resources as raw materials has become an important focus for countries around the world to build new economic growth points. Compared with petroleum raw materials, biomass raw materials are not only cheap, environmentally friendly, and renewable, but also have richer compositions, functions, and unique structures. In recent years, with the further deepening of research on biomass-based materials, the application of biomass-based materials has also expanded from traditional fields such as textiles and papermaking to emerging high value-added industries such as bio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02C01B31/12
Inventor 王小慧徐曼曼孙润仓黄权波
Owner SOUTH CHINA UNIV OF TECH
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