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Preparation method and application of biomass porous carbon material based on castor seed residues

A porous carbon material, biomass technology, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems of influence, poor chemical functionality, high viscosity, etc., to achieve widespread application value, simple preparation method, excellent Effects of Capacitance Characteristics

Inactive Publication Date: 2021-04-13
EASTERN GANSU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The use of biomass carbon materials for chemical energy storage is an extremely important application. At present, a variety of biomass-based carbon materials have been successfully used as electrode materials, including peanut bran, cotton fiber, loofah and fruit peel. Biomass raw materials, but the pore distribution and pore size of biomass carbon materials are mainly microporous structures, and there are technical problems such as unsatisfactory crosslinking of porous structures and poor chemical functionality, which limits its potential application value
[0006] At present, although there are studies on using castor bean residue in electrode materials, even if the oil in castor bean is sufficiently extracted, there will still be castor oil in castor bean residue, and castor oil is not Dry oil with high viscosity will have a very bad effect on the performance of electrode materials. Therefore, it is still impossible to achieve the excellent electrochemical performance of castor bean residue-based biomass carbon materials.

Method used

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  • Preparation method and application of biomass porous carbon material based on castor seed residues
  • Preparation method and application of biomass porous carbon material based on castor seed residues
  • Preparation method and application of biomass porous carbon material based on castor seed residues

Examples

Experimental program
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Effect test

Embodiment 1

[0037] 1. Mix castor bean residue (0.5g), concentrated sulfuric acid (10mL) and deionized water (30mL), seal in a 100mL reaction kettle, and heat at 180°C for 12 hours. The resulting mixture was filtered, and the filtered product was washed with deionized water several times, and dried at 80°C.

[0038] 2. the product after step (1) drying and K 2 FeO 4 Add deionized water at different mass ratios of 1:1, stir at room temperature for 8 hours, and dry at 80°C overnight after the reaction is complete to obtain a solid mixture.

[0039] 3. Heat the solid mixture to 600°C in a tube furnace, 2 Under the atmosphere, the heating rate was 5°C / min and kept for 2h. Then, the solid mixture was washed with 3M hydrochloric acid and deionized water until the solution became neutral. Finally, dry at 100°C to obtain a porous carbon material derived from castor bean residue.

[0040] Morphological characterization of castor bean residue-derived porous carbon materials:

[0041] The morph...

Embodiment 2

[0053] 1. Mix castor bean residue (1.8g), concentrated sulfuric acid (3mL) and deionized water (40mL), seal in a 100mL reaction kettle, and heat at 120°C for 6 hours. The resulting mixture was filtered, and the filtered product was washed with deionized water several times, and dried at 80°C.

[0054] 2. the product after step (1) drying and K 2 FeO 4 Add deionized water at different mass ratios of 1:3, stir at room temperature for 10 h, and dry at 100°C overnight after the reaction is complete to obtain a solid mixture.

[0055] 3. Heat the solid mixture to 900°C in a tube furnace, 2 Under the atmosphere, the heating rate was 10°C / min and kept for 6h. Then, the solid mixture was washed with 1M hydrochloric acid and deionized water until the solution became neutral. Finally, dry at 80°C to obtain a porous carbon material derived from castor bean residue.

Embodiment 3

[0057] 1. Mix castor bean residue (1.2g), concentrated sulfuric acid (8mL) and deionized water (60mL), seal in a 100mL reactor, and heat at 160°C for 10 hours. The resulting mixture was filtered, and the filtered product was washed with deionized water several times, and dried at 80°C.

[0058] 2. the product after step (1) drying and K 2 FeO 4 Add deionized water at different mass ratios of 1:2, stir at room temperature for 12 h, and dry at 90°C overnight after the reaction is complete to obtain a solid mixture.

[0059] 3. Heat the solid mixture to 800°C in a tube furnace, 2 Under the atmosphere, the heating rate was 8°C / min and kept for 4h. Then, the solid mixture was washed with 2M hydrochloric acid and deionized water until the solution became neutral. Finally, dry at 90°C to obtain a porous carbon material derived from castor bean residue.

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Abstract

The invention discloses a preparation method and application of a biomass porous carbon material based on castor seed residues, and relates to the technical field of electrode material preparation. The preparation method comprises the steps of carrying out heating reaction on castor seed residues, concentrated sulfuric acid and deionized water, drying the product, adding the dried product and K2FeO4 into the deionized water, reacting at room temperature for 8 to 12 hours, and drying overnight at 80 to 100 DEG C to obtain a solid mixture; and calcining the solid mixture, washing to be neutral, and drying to obtain the biomass porous carbon material. The castor seed residue-based porous carbon material prepared by the invention presents a unique three-dimensional cross-linked hierarchical porous structure, is excellent in electrochemical performance, not only can realize high-value utilization of castor seed residues, but also is simple in preparation method, and has wide popularization and application values in the field of electrode material preparation.

Description

technical field [0001] The invention relates to the technical field of electrode material preparation, in particular to a preparation method and application of a castor bean residue-based biomass porous carbon material. Background technique [0002] Castor (Ricinus communis L.), commonly known as hemp seed, old pockmark, hemp, etc., is an annual or perennial herb belonging to the family Euphorbiaceae, one of the top ten oil crops in the world, and a special industrial oil source crop. Castor is native to Africa and has been introduced to Asia, America and Europe successively. Because of its well-developed root system and wide adaptability, it is resistant to salt, drought and alkali, and has a wide range of planting. [0003] Castor is one of the top ten oil crops in the world. At present, my country's castor production ranks second in the world, second only to India. Castor bean contains 46%-55% oil by mass fraction, and castor oil is a non-drying oil with high viscosity a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/324C01B32/348C03C8/00H01G11/44H01G11/34
CPCC01B32/324C01B32/348C03C8/00H01G11/44H01G11/34
Inventor 侯丽杰仵博万
Owner EASTERN GANSU UNIVERSITY
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