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Method for preparing nitrogen-doped graphene by treating carbonate by shock waves

A technology of nitrogen-doped graphene and carbonate, which is applied in the field of technology, can solve the problems of long reaction duration of reaction equipment, danger in the production process, and high production cost, and achieve good redox catalytic activity, low price, and high production cost. low cost effect

Inactive Publication Date: 2015-01-07
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] For the existing method of preparing graphene from carbonate, the raw materials need to be in a closed high-temperature environment for a long time, the requirements for the reaction equipment are high, and the reaction duration is long, so there are problems of high production cost, complicated process, and dangerous situations in the production process. Problem, the object of the present invention is to provide a method for preparing nitrogen-doped graphene by shock wave treatment of carbonate, the method is low in cost, short in production cycle, simple in process, convenient for industrial production, low in requirements for production conditions, and the production process less likely to be dangerous

Method used

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  • Method for preparing nitrogen-doped graphene by treating carbonate by shock waves
  • Method for preparing nitrogen-doped graphene by treating carbonate by shock waves
  • Method for preparing nitrogen-doped graphene by treating carbonate by shock waves

Examples

Experimental program
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Effect test

Embodiment 1

[0064] (1) Mix magnesium carbonate (8g), sodium (4g) and ammonium nitrate (3.2g) evenly to obtain powder 1; put powder 1 into a copper-lined stainless steel box, and compact it with a hydraulic press to obtain the powder 1. Preform with a density of 95%;

[0065] Among them, the thickness of the copper lining is 1mm; the wall thickness of the stainless steel box is 2mm; the pressure of the hydraulic press is 7.5MPa, and the holding time is 2min;

[0066] (2) impacting the sample box with a flyer with a speed of 2.83km / s induces a chemical reaction, and obtains powder 2; wherein the flyer is a flyer driven by nitromethane liquid detonation;

[0067] (3) Put powder 2 into the reactor, add concentrated nitric acid to purify, react at 70°C for 13h, filter and wash to obtain solid a, freeze and dry in vacuum to obtain black powder, obtained by figure 2 It can be seen that element binding energy peaks appear at 284eV, 400eV, and 532eV in the element binding energy spectrum of the ...

Embodiment 2

[0070] (1) Mix calcium carbonate (12g), sodium (3g) and ammonium nitrate (0.6g) evenly to obtain powder 1; put powder 1 into a copper-lined stainless steel box, and compact it with a hydraulic press to obtain the powder 1. A blank with a density of 80%; the thickness of the copper lining is 2mm; the wall thickness of the stainless steel box is 3mm; the pressure of the hydraulic press is 7.5MPa, and the holding time is 1min;

[0071] (2) impacting the sample box with a flyer with a speed of 2.95km / s induces a chemical reaction to obtain powder 2; wherein the flyer is a flyer driven by the detonation of nitromethane liquid;

[0072] (3) Put the powder 2 into the reactor, add concentrated nitric acid for purification, react at 65°C for 15 hours, filter and wash to obtain solid a, freeze and dry in vacuum to obtain a black powder, obtained by Figure 9 It can be seen that in the element binding energy spectrum of the black powder, element binding energy peaks appear at 284eV, 400e...

Embodiment 3

[0075] (1) Mix calcium carbonate (9g), magnesium (3g) and urea (1.8g) evenly to obtain powder 1; put powder 1 into a copper-lined stainless steel box and compact it with a hydraulic press to obtain a dense 88% of the initial billet; among them, the thickness of the copper lining is 3mm; the wall thickness of the stainless steel box is 3mm; the pressure of the hydraulic press is 7.5MPa, and the holding time is 2min;

[0076] (2) impacting the sample box with a flyer with a speed of 3.37km / s to induce a chemical reaction to obtain powder 2; wherein the flyer is a flyer driven by the detonation of a nitromethane liquid;

[0077] (3) Put the powder 2 into the reactor, add concentrated nitric acid for purification, react at 80°C for 12 hours, filter and wash with suction to obtain solid a, freeze and vacuum-dry to obtain a black powder, obtained by Figure 16 It can be seen that in the element binding energy spectrum of the black powder, element binding energy peaks appear at 284eV...

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Abstract

The invention discloses a method for preparing nitrogen-doped graphene by treating carbonate by shock waves and belongs to the technical field of processes. The method comprises the following steps: uniformly mixing a carbon source, a reducing agent and a nitrogen source and compacting to obtain an initial blank; colliding a sample box by using a flyer to induce chemical reaction to obtain powder; putting the powder into a reactor, adding concentrated nitric acid for purification, reacting and filtering and washing to obtain a solid a; and drying to obtain the nitrogen-doped graphene. The number of molecular layers of the nitrogen-doped graphene is 1-6, and the nitrogen doping content is high, so that the nitrogen-doped graphene has good oxygen reduction catalytic activity. The method is low in cost, short in production period, simple in process and low in requirements on production conditions, hardly causes dangers in the production process and can be put into industrial production conveniently.

Description

technical field [0001] The invention relates to a method for preparing nitrogen-doped graphene by shock wave treatment of carbonate, belonging to the technical field of technology. Background technique [0002] In 2004, it was obtained by Novoselov of the University of Manchester in the United Kingdom by using tape to peel off highly oriented graphite, and discovered the relativistic particle characteristics of graphene carriers. The discovery of graphene announced a truly independent two-dimensional material, and the zero-dimensional fullerene (Fullerene) discovered in 1985 and the one-dimensional carbon nanotubes (carbon nanotubes) discovered in 1991, as well as the well-known The sp3 hybridized three-dimensional diamond and sp2 hybridized three-dimensional graphite together form a large family of carbon systems, which expands the scope of carbon allotropes and enables people to have a deeper understanding of the diversity of carbon elements. Graphene is a new type of car...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04
Inventor 陈鹏万尹昊高鑫徐春晓周强
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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