Preparation and application of nitrogen-doped porous carbon material

A technology for nitrogen-doped porous carbon and nitrogen compounds, applied in the field of porous materials, can solve problems such as waste, and achieve the effects of simple preparation process, high added value, and easy industrialization

Inactive Publication Date: 2018-09-14
GUILIN UNIV OF ELECTRONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Ginkgo biloba, as one of the most popular ornamental plants in our country, is widely planted in streets, parks and mountains, and thousands of tons of ginkgo leaves are produced

Method used

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  • Preparation and application of nitrogen-doped porous carbon material
  • Preparation and application of nitrogen-doped porous carbon material
  • Preparation and application of nitrogen-doped porous carbon material

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Experimental program
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Embodiment

[0039] Step 1) Wash the ginkgo leaves, cut them into pieces, dry them, place them in a tube furnace at 500 °C, and carbonize them at a low temperature for 2 hours. Filter, wash, dry, and grind the carbonized products to obtain nitrogen-doped carbon Material;

[0040] Step 2) Mix the carbon precursor with KOH and urea at a mass ratio of 1.0:3.0:1.0, soak in 30ml deionized water, stir magnetically for 2 hours, dry and put it into a tube furnace for calcination under nitrogen protection. The calcination activation temperature was 700℃, the heating rate was 3℃, and the calcination activation time was 2 h to obtain nitrogen-doped porous activated carbon materials;

[0041] Step 3) The above product was soaked in 1M HCl solution, washed with deionized water, filtered until neutral, dried and ground to obtain a nitrogen-doped porous carbon material.

[0042] The nitrogen-doped porous carbon material prepared in the embodiment is tested by scanning electron microscope, and the result...

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Abstract

The invention discloses a nitrogen-doped porous carbon material. The nitrogen-doped porous carbon material is prepared through low-temperature carbonization treatment on ginkgo leaves and calcined activation of the processed ginkgo leaves with nitrogenous compounds and alkali inorganic matters. The range of the specific surface area of the nitrogen-doped porous carbon material is 888-1132 m2g-1, and the pore size is uniform in distribution within the range of 1.20-2.13 nm. The preparation method of the nitrogen-doped porous carbon material comprises 1) performing low-temperature carbonizationon the ginkgo leaves to obtain a carbon precursor; 2) activating the carbon precursor; 3) performing aftertreatment on an obtained nitrogen-doped carbon material. The invention also discloses application of the nitrogen-doped porous carbon material as a supercapacitor material. When the electric current density is 1 A g-1, the range of the specific capacitance of the nitrogen-doped porous carbon material is 254-356 F g-1. According to the nitrogen-doped porous carbon material, the ginkgo leaves serve as a carbon source, so that the comprehensive utilization rate of ginkgo leaf resources can beimproved, products with high value added can be acquired, and good electrochemical properties can be achieved.

Description

technical field [0001] The invention relates to the technical field of porous materials, in particular to the preparation and application of a nitrogen-doped porous carbon material. Background technique [0002] Electrochemical supercapacitor is a new type of energy storage device between traditional capacitors and rechargeable batteries. Due to its outstanding advantages such as high specific power and long life, it has become a research hotspot in the field of electrochemical energy storage in recent years. Carbon material is a kind of electrode material of electric double layer capacitor. Due to its large specific surface area, stable physical and chemical properties, and low cost, it has attracted the attention of many researchers. Activated carbon, template carbon, carbon nanotubes, carbon aerogel, and ordered mesoporous carbon have all become electrode materials for supercapacitors, and by adjusting the specific surface area, conductivity, length and distribution of po...

Claims

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Application Information

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IPC IPC(8): C01B32/324C01B32/348H01G11/34H01G11/44
Inventor 孙立贤李晶华徐芬洪先永陈沛荣
Owner GUILIN UNIV OF ELECTRONIC TECH
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