Preparation method of nitrogen-doped graphitized carbon nanocage

A nano-carbon cage and graphitization technology, which is applied in the direction of nano-carbon, nanotechnology, nanotechnology, etc., can solve the problems of time-consuming and labor-consuming, complicated process of amorphous carbon precursor, and achieve the effect of simplifying the production process

Active Publication Date: 2018-08-28
JIANGHAN UNIVERSITY
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  • Abstract
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Problems solved by technology

[0005] When preparing hollow nano-carbon cages by the hard template method, it is necessary to prepare amorphous ca...

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  • Preparation method of nitrogen-doped graphitized carbon nanocage
  • Preparation method of nitrogen-doped graphitized carbon nanocage
  • Preparation method of nitrogen-doped graphitized carbon nanocage

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preparation example Construction

[0029] The embodiment of the present invention provides a preparation method of nitrogen-doped graphitized nano-carbon cage, the preparation method comprising:

[0030] The cyanamide compound is physically mixed with metal acetate or metal carbonate to obtain a mixture.

[0031] Under the atmosphere of inert gas, the mixture is subjected to carbonization treatment to obtain a carbonized product; the carbonized product is a cyanometallic compound covered with a carbon layer on the surface.

[0032] After the carbonization product is subjected to acid etching to remove the metal compound, an etching product is obtained.

[0033] The etching product is purified to obtain the nitrogen-doped graphitized nano-carbon cage.

[0034] Specifically, the mass ratio of the cyanamide compound to the metal acetate or metal carbonate may be (5-20):1.

[0035] Specifically, the cyanamide compound may be dicyandiamide or melamine.

[0036] Specifically, the metal acetate may be calcium aceta...

Embodiment 1

[0044] Physically mix dicyandiamide and calcium acetate with a mass ratio of 5:1 to obtain a mixture. After the mixture is fully ground in a mortar, the mixture is placed on a quartz burning boat, and the quartz burning boat loaded with the mixture is placed on the tube. In a type furnace, under the protection of a nitrogen atmosphere, the temperature was raised from room temperature to 800 °C at a rate of 2 °C / min, kept at 800 °C for 1 h, and then cooled to room temperature to obtain a carbonized product (powder). Put the carbonized product into a round-bottom flask, add a hydrochloric acid solution with a concentration of 3mol / L into the round-bottom flask, and reflux the round-bottom flask at 80°C for 24 hours to obtain an etching product, which is subjected to suction filtration , to obtain a filter cake, repeatedly disperse the filter cake in distilled water and then carry out suction filtration, collect the filtrate respectively until the pH value of the filtrate is 6.8 t...

Embodiment 2

[0048] Physically mix melamine and magnesium acetate with a mass ratio of 10:1 to obtain a mixture. After the mixture is fully ground in a mortar, the mixture is placed on a quartz burning boat, and the quartz burning boat loaded with the mixture is placed in a tube furnace Inside, under the protection of a helium atmosphere, the temperature was raised from room temperature to 800 °C at a rate of 2 °C / min, kept at 800 °C for 3 h, and then cooled to room temperature to obtain a carbonized product (powder). Put the carbonized product into a round bottom flask, add a sulfuric acid solution with a concentration of 5mol / L into the round bottom flask, and reflux the round bottom flask at 80°C for 48 hours to obtain an etching product, which is suction filtered , to obtain a filter cake, repeatedly disperse the filter cake in distilled water and then carry out suction filtration, collect the filtrate respectively until the pH value of the filtrate is 6.8 to 7.2, obtain the washed filt...

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Abstract

The invention discloses a preparation method of a nitrogen-doped graphitized carbon nanocage and belongs to the field of novel carbon nanomaterials. The preparation method comprises steps as follows:cyanamide compounds are physically mixed with metal acetate or metal carbonate, and a mixture is obtained; the mixture is carbonized in the atmosphere of inert gas, and a carbonized product is obtained; the carbonized product is subjected to acid etching, and an etched product is obtained; the etched product is purified, and the nitrogen-doped graphitized carbon nanocage is obtained. According tothe preparation method provided by the embodiment of the invention, a template is not required to be prepared in advance, so that the production technology is simplified.

Description

technical field [0001] The invention relates to the field of novel nano-carbon materials, in particular to a preparation method of nitrogen-doped graphitized nano-carbon cages. Background technique [0002] Hollow nanocarbon cages are usually produced as a by-product of carbon nanotubes, and this new carbon-based nanomaterial is a hollow-shell nanocarbon material formed from multilayer graphite sheets. The pore size of most hollow nano-carbon cages is between 2 and 100 nm, and has a large specific surface area, so it can be widely used in nano-reaction containers, adsorbents, electrochemistry and other fields. [0003] The existing preparation methods of hollow nano-carbon cages mainly include the hard template method. There is a method for preparing hollow nano-carbon cages by a hard template method. This method needs to prepare an amorphous carbon precursor with a catalyst first. The preparation method of the amorphous carbon precursor includes: passing a mixed gas of ine...

Claims

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Application Information

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IPC IPC(8): C01B32/15B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00
Inventor 梁济元陈盛锐刘妍赵金星刘畅叶苗汤舜曹元成
Owner JIANGHAN UNIVERSITY
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