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Method for preparing nitrogen-rich porous carbon material

A porous carbon and nitrogen-enriched technology, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of nitrogen-rich porous carbon materials such as no patents and literature reports, and achieve the effect of a simple method

Inactive Publication Date: 2012-10-31
NO 63971 TROOPS PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] There are no patents or literature reports on the method of preparing nitrogen-rich porous carbon m

Method used

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  • Method for preparing nitrogen-rich porous carbon material
  • Method for preparing nitrogen-rich porous carbon material
  • Method for preparing nitrogen-rich porous carbon material

Examples

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Embodiment 1

[0022] Place the tetrasodium salt of ethylenediaminetetraacetic acid in the center of a tube-type resistance furnace, pass through high-purity argon gas protection, heat to 700 ° C, keep the temperature constant for 5 hours, and take it out after the furnace temperature cools to room temperature. Add excess dilute hydrochloric acid to remove metal oxides. Then wash with deionized water until neutral to obtain a nitrogen-rich porous carbon material.

[0023] figure 1 It is the scanning electron micrograph of the obtained carbon material. Depend on figure 2 The nitrogen adsorption isotherm of the obtained carbon material shown in the calculation shows that its BET specific surface area is 708m 2 / g, pore volume 0.366cm 3 / g. Depend on image 3 X-ray photoelectron spectroscopy of the resulting carbon material shown gives a nitrogen content of 7.74%. The material is used in supercapacitors by Figure 4 The charge-discharge curve of the obtained carbon material at a curren...

Embodiment 2

[0025] Place disodium magnesium EDTA in a muffle furnace protected by high-purity nitrogen, heat to 800°C, keep the temperature constant for 2 hours, and take it out after the furnace cools down to room temperature. Add excess dilute sulfuric acid to remove metal oxides. Then wash with deionized water until neutral to obtain a nitrogen-rich porous carbon material. The BET specific surface area of ​​the carbon material is 1811m 2 / g, pore volume 1.02cm 3 / g, the nitrogen content is 3.81%.

Embodiment 3

[0027] Place calcium ethylenediaminetetraacetate in a tubular resistance furnace, pass through high-purity nitrogen protection, heat to 900°C, keep the temperature constant for 1h, and take it out after the furnace cools down to room temperature. Add excess dilute hydrochloric acid to remove metal oxides. Then wash with deionized water until neutral to obtain a nitrogen-rich porous carbon material. The BET specific surface area of ​​the carbon material is 1350m 2 / g, pore volume 1.61cm 3 / g, the nitrogen content is 2.32%.

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Abstract

The invention discloses a method for preparing a nitrogen-rich porous carbon material and belongs to the technical field of carbon materials. According to the method, edentate is used as a raw material and subjected to high temperature pyrolysis under the protection of an inert atmosphere and then to pickling and rinsing to obtain the simply prepared nitrogen-rich porous carbon material. The method for preparing the nitrogen-rich porous carbon material is simple and easy to operate. The carbon material is provided with a high nitrogen content and a developed porous structure, the nitrogen content can reach 1.6-15.5%, the specific surface area is 600-2000m<2>/g, the pore volume is 0.3-1.8 cm<3>/g, and the carbon material can be used in fields of electrochemistry energy storage, catalyst carriers, absorption, gas storage and the like.

Description

technical field [0001] The invention relates to a preparation method of a nitrogen-rich porous carbon material, belonging to the technical field of inorganic non-metallic carbon materials. Background technique [0002] Porous carbon material, also known as activated carbon, has a high specific surface area and developed pore structure. It is an adsorption material with excellent performance. Used in gas storage, catalyst support and electrochemical energy storage, etc. The preparation of porous carbon materials generally uses coal, resin and woody materials as raw materials. The traditional preparation method is to first pyrolyze and carbonize them at high temperature in an inert atmosphere, and then perform physical activation (using water vapor, air or carbon dioxide as activators). or chemical activation (with H 3 PO 4 , ZnCl 2 , KOH, NaOH, etc. as activators). Carbonization only forms preliminary pores, generally with a specific surface area of ​​100m 2 Within / g. ...

Claims

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Application Information

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IPC IPC(8): C01B31/02C01B32/312
Inventor 徐斌段慧郑冬芳曹高萍张浩张文峰杨裕生
Owner NO 63971 TROOPS PLA
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