Method for preparing boron and nitrogen codoped graphitized nano carbon by taking biomass as carbon source

A biomass and co-doping technology, applied in nano-carbon, graphene, nano-technology, etc., can solve the problems of low boron and nitrogen content, complex preparation process, high cost, etc. The effect of simplicity and reduced synthesis cost

Active Publication Date: 2013-10-02
HEILONGJIANG UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims to solve the problems that the existing boron-nitrogen co-doped graphitized nano-carbon has complex preparation process, harsh reaction conditions, low boron and nitrogen content, low

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  • Method for preparing boron and nitrogen codoped graphitized nano carbon by taking biomass as carbon source
  • Method for preparing boron and nitrogen codoped graphitized nano carbon by taking biomass as carbon source

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specific Embodiment approach 1

[0016] Specific embodiment 1: This embodiment uses biomass as a carbon source to prepare a method for preparing boron-nitrogen co-doped graphitized nano-carbon, specifically according to the following steps:

[0017] 1. Using chemical methods to pre-treat biomass;

[0018] 2. Add the biomass treated in step one to the solvent, then add the compound containing boron element, the compound of nitrogen element and the graphitization catalyst, and then the temperature is 25℃~60℃, the stirring speed is 80r / min~200r Stir for 2h~10h under the condition of / min, then evaporate the solvent to dryness at a temperature of 80℃~110℃ to obtain the precursor;

[0019] 3. Carbonization treatment: under the protection of inert gas, the precursor obtained in step 2 is controlled at a heating rate of 2℃ / min~15℃ / min, and the temperature is raised to 600℃~1200℃, and the holding time is 30min~300min to obtain a carbonized product ;

[0020] 4. Acid treatment: add the carbonized product obtained in step 3 t...

specific Embodiment approach 2

[0022] Specific embodiment two: this embodiment is different from specific embodiment one in that: the pretreatment steps in step one are as follows: biomass is added to an aqueous solution of potassium hydroxide with a mass fraction of 10% to 35%, and the mass fraction It is an aqueous solution of 10% to 35% sodium hydroxide, an aqueous solution of hydrochloric acid with a mass fraction of 10% to 35%, an aqueous solution of nitric acid with a mass fraction of 10% to 35%, or a high manganese solution with a mass fraction of 10% to 35% In the potassium acid aqueous solution, the activation temperature is 90℃~190℃ for 3h~8h to complete the pretreatment. Others are the same as the first embodiment.

specific Embodiment approach 3

[0023] Specific embodiment three: this embodiment is different from specific embodiment one in that the biomass mentioned in step one is coconut shell, corn stover, palm shell, bagasse, cattail, bamboo or wood chips. Others are the same as the first embodiment.

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Abstract

The invention discloses a method for preparing boron and nitrogen codoped graphitized nano carbon by taking biomass as a carbon source, and relates to a synthetic method of boron and nitrogen codoped graphitized nano carbon. The method aims at solving the problem that industrial production is difficult to achieve due to the fact that the existing preparation technology of boron and nitrogen codoped graphitized nano carbon is complicated, reaction conditions are harsh, the contents of boron and nitrogen are low, the yield is low, and the cost is high. The method comprises the steps of 1, pretreatment, 2, precursor preparation, 3, carbonization treatment and 4, acid treatment. The method adopts the rich biomass in nature as the carbon source, so that a preparation technology is simple, and the synthetic cost of a material is lowered; by changing a material ratio of raw materials, the contents of nitrogen and boron in a finished product and graphitization degrees of nitrogen and boron can be adjusted and controlled, and requirements of different fields can be met; and the biomass is uniform in component, so that functionalization ions can be dispersed in the biomass very well, and a pattern and the property of the product are uniform. The method is used for preparing boron and nitrogen codoped graphitized nano carbon by taking the biomass as the carbon source.

Description

Technical field [0001] The invention relates to a method for synthesizing graphitized nano carbon co-doped with boron and nitrogen. Background technique [0002] Fuel cell has the advantages of high energy density, high conversion efficiency and environmental friendliness, so it is considered to be the most promising energy conversion device. Cathodic oxygen reduction reaction kinetics is relatively slow, which is the key to determining fuel cell performance. So far, precious metals Pt and Pt-based alloys are the most effective oxygen reduction catalysts. However, the high price, poor durability, and lack of resources of precious metal Pt limit the commercial application of fuel cells. Therefore, current researchers are committed to developing inexpensive non-noble metal oxygen reduction catalysts. [0003] The non-precious metal-doped carbon material has excellent oxygen reduction reaction activity and ability to resist carbon monoxide poisoning, so it is considered to be a che...

Claims

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Application Information

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IPC IPC(8): C01B31/04B82Y30/00C01B32/184
Inventor 付宏刚王蕾赵璐穆光尹婕赵冬冬于鹏
Owner HEILONGJIANG UNIV
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