Preparation method and application of biological-based oxygen, sulfur and nitrogen codoped porous carbon

A bio-based, co-doping technology, applied in chemical instruments and methods, alkali metal oxides/hydroxides, other chemical processes, etc., can solve the problem that aquatic animal skin or bone is not effectively used, pollutes the environment, and wastes resources. and other problems, to achieve the effect of improving the cycle performance of the battery, abundant sources and low cost

Inactive Publication Date: 2017-12-22
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the skin or bone of aquatic animals has not been effectively utilized, and is mainly sold as low-value feed

Method used

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  • Preparation method and application of biological-based oxygen, sulfur and nitrogen codoped porous carbon
  • Preparation method and application of biological-based oxygen, sulfur and nitrogen codoped porous carbon
  • Preparation method and application of biological-based oxygen, sulfur and nitrogen codoped porous carbon

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Clean the fish bones and put them in 60 o C oven, placed for 24 hours to dry. The dried fish bones are crushed into aquatic animal skin or bone powder with a grinder, placed in a tube furnace and heated to 330 °C under an inert gas atmosphere. o C, and keep the temperature for 3 hours for low-temperature pre-carbonization; mix the pre-carbonized fishbone powder and activator evenly according to the ratio of 5:1, and then place the mixed powder in a tube furnace to heat up to 700 o C, high-temperature carbonization at constant temperature for 1 hour to obtain bio-based carbonized powder. The bio-based carbonized powder was placed in 1mol / L hydrochloric acid solution for 3 times of pickling to remove the inorganic template and active agent in the bio-based carbonized powder, and then filtered and washed with deionized water repeatedly. Put the finished product in 80 o C dried in an oven for 24 hours to obtain oxygen, sulfur and nitrogen co-doped bio-based porous carbon...

Embodiment 2

[0028] Clean the fish bones and put them in 60 o C oven, placed for 24 hours to dry. Grind the dried aquatic animal skin or bone into aquatic animal skin or bone powder with a pulverizer, place it in a tube furnace and heat it to 330 °C under an inert gas atmosphere. o C, and keep the temperature for 3 hours for low-temperature pre-carbonization; the pre-carbonized fishbone powder and activator are evenly mixed according to the ratio of 5:1, and then the mixed powder is placed in a tube furnace and heated to 800 o C, high-temperature carbonization at constant temperature for 1 hour to obtain bio-based carbonized powder. The bio-based carbonized powder was placed in 1mol / L hydrochloric acid solution for 3 times of pickling to remove the inorganic template and active agent in the bio-based carbonized powder, and then filtered and washed with deionized water repeatedly. Put the finished product in 80 o C dried in an oven for 24 hours to obtain oxygen, sulfur and nitrogen co-do...

Embodiment 3

[0030] Clean the fish bones and put them in 60 o C oven, placed for 24 hours to dry. The dried fish bones are crushed into aquatic animal skin or bone powder with a grinder, placed in a tube furnace and heated to 330 °C under an inert gas atmosphere. o C, and keep the temperature for 3 hours for low-temperature pre-carbonization; uniformly mix the pre-carbonized fishbone powder and activator according to the ratio of 5:1, and then place the mixed powder in a tube furnace to heat up to 900 oC, high-temperature carbonization at constant temperature for 1 hour to obtain bio-based carbonized powder. The bio-based carbonized powder was placed in 1mol / L hydrochloric acid solution for 3 times of pickling to remove the inorganic template and active agent in the bio-based carbonized powder, and then filtered and washed with deionized water repeatedly. Put the finished product in 80 o C dried in an oven for 24 hours to obtain oxygen, sulfur and nitrogen co-doped bio-based porous carb...

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Abstract

The invention relates to a preparation method and application of biological-based oxygen, sulfur and nitrogen codoped porous carbon. Skin or bones of aquatic animals serve as the raw materials of the oxygen, sulfur and nitrogen codoped porous carbon, the specific surface area of the biological-based oxygen, sulfur and nitrogen codoped porous carbon obtained through activation is 1144.63 to 1517.03 m<2>/g<-1>, the nitrogen doping amount can reach 5.9 percent, and the sulfur doping amount can reach 2 percent. By the preparation method, the pore structure of the porous carbon can be regulated and controlled, codoping of oxygen, sulfur and nitrogen is realized, and the process is scientific, reasonable and easy to operate, so that the production cost of the oxygen, sulfur and nitrogen codoped material is reduced. The physical and chemical properties of the prepared biological-based oxygen, sulfur and nitrogen codoped porous carbon are obviously improved.

Description

technical field [0001] The invention belongs to the field of adsorbents, and in particular relates to a preparation method of bio-based oxygen, sulfur and nitrogen co-doped porous carbon and its application in lithium-sulfur batteries. Background technique [0002] Due to their unique pore structure and excellent physical and chemical stability, porous carbon materials are widely used in the fields of catalysis, adsorption, sensing and electrochemistry. [0003] Heteroatom doping of porous carbon materials can improve the composition of surface elements, significantly improve the electron distribution and lattice structure of the materials, affect the hydrophilicity of porous carbon materials and the acidity and alkalinity of the material surface, and then affect the electrical properties of porous carbon materials. Chemical properties are improved. Nitrogen atoms and carbon atoms have similar atomic radii, so that carbon atoms in porous carbon materials can be easily repla...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/28B01J20/30
Inventor 黄雅钦艾飞刘乃强
Owner BEIJING UNIV OF CHEM TECH
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