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Method for synthesizing carbide/porous graphitized carbon nano compound through one-step method

A technology of porous graphitic carbon and nanocomposite, applied in the fields of carbon compounds, chemical instruments and methods, nanotechnology, etc., can solve the problems of small specific surface area, large particle size, uneven distribution of tungsten carbide, etc. The effect of small size and cheap carbon source

Inactive Publication Date: 2013-05-22
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims to solve the problem of uneven distribution of tungsten carbide, larger particle size and small specific surface area in the compound of carbide / porous graphite carbon nanometer prepared in the prior art; and provides a one-step synthesis of carbide / porous graphite carbon nanometer complex method

Method used

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  • Method for synthesizing carbide/porous graphitized carbon nano compound through one-step method
  • Method for synthesizing carbide/porous graphitized carbon nano compound through one-step method
  • Method for synthesizing carbide/porous graphitized carbon nano compound through one-step method

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specific Embodiment approach 1

[0009] Specific embodiment one: the method for synthesizing carbide / porous graphite carbon nanocomposites in one step in this embodiment is completed by the following steps: one, the carbon source and transition metal salts are dissolved in the mass ratio of 10:2 In solvent, then add pore forming agent, then add graphitization catalyst, dry, obtain precursor; Wherein the mass volume ratio of carbon source and solvent is 1: (5~30), the mass volume ratio of carbon source and pore forming agent is 1: (1 ~ 10), the mass ratio of carbon source and graphite catalyst is 1: (0.5 ~ 5), wherein the transition metal salts are tungsten source, molybdenum source or vanadium source; 2. Under the condition of inert gas protection, From room temperature to 500-1100°C, the temperature rise rate is 2-20°C / min, and then heat-treat the precursor in step 1 for 0.5-10 hours to obtain the pre-product; 3. Grind the pre-product obtained in step 2, and then carry out Acid treatment, and then washed wit...

specific Embodiment approach 2

[0011] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the carbon source in step one is the extract of crops, high molecular polymer or shell extract, wherein the extract of crops is glucose, sucrose, citric acid , sucrose, fructose, maltose, oxalic acid, tartaric acid or starch; the polymer is one of polystyrene, polyacrylamide, polyfurfuryl alcohol, polyimide, polyurethane, polyglucosamine, polyvinyl acid methyl ester and polyaniline or a mixture of several of them in any ratio; the shell extract is chitosan or chitin. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0012] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the tungsten source in step one is H 2 W 6 o 19 、H 3 PW 12 o 40 、H 3 SiW 12 o 40 、H 4 W 10 o 32 , (NH 4 ) 6 W 7 o 24 、Na 2 WO 4 、Na 2 W 6 o 19 , WCl 6 、Na 3 PW 12 o 40 、Na 3 SiW 12 o 40 、Na 4 W 10 o 32 、K 2 W 6 o 19 、K 3 PW 12 o 40 、K 3 SiW 12 o 40 or K 4 W 10 o 32 ;Molybdenum source is H 2 Mo 6 o 19 、H 3 PMo 12 o 40 、H 3 SiMo 12 o 40 、H 4 Mo 10 o 32 , (NH 4 ) 6 Mo 7 o 24 、Na 2 MoO 4 、Na 2 Mo 6 o 19 、Na 3 PMo 12 o 40 、Na 3 SiMo 12 o 40 、Na 4 Mo 10 o 32 、K 2 Mo 6 o 19 、K 3 PMo 12 o 40 、K 3 SiMo 12 o 40 or K 4 Mo 10 o 32 ; Vanadium source is: HVO 3 、H 3 VO 4 、H 4 V 2 o 7 、H 3 V 3 o 9 、NaVO 3 , NH 4 VO 3 , Na 3 VO 4 or (NH 4 ) 2 V 6 o 16 . Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention provides a method for synthesizing a carbide / porous graphitized carbon nano compound through a one-step method, relates to a method for synthesizing a carbide / porous graphitized carbon nano compound and aims to solve the problems of large size, uneven distribution, high aggregation possibility and small specific surface area of carbide particles in the carbide / porous graphitized carbon nano compound preparation in the prior art. The method comprises the following steps: 1, dissolving a carbon source and transition metal salt in solvent; 2, adding a pore forming agent and a graphitizing catalyst; 3, performing high-temperature carbonization; and 4, performing acid treatment, and then drying. The invention has the advantages that the synthesis method is simple, the synthesized carbide particle are small in size, even in distribution and large in specific surface area, the environmental pollution is less, the cost is low and the required synthesis equipment is simple, so that the invention is easy to realize commercialization. The invention is applicable to the field of energy storage and conversion.

Description

technical field [0001] The invention relates to a method for synthesizing carbide / porous graphite carbon nanocomposite. Background technique [0002] At present, the energy storage capacity of fossil fuels is decreasing day by day, and they release a large amount of harmful gases when they are burned. Therefore, people have begun to pay great attention to the development of new energy sources to solve energy and environmental problems. In recent years, it has been found that direct methanol Fuel cells are a new energy source that can potentially replace fossil fuels. However, because the catalysts used in the cathode and anode are noble metal catalysts, most of them are based on Pt. Its use in catalysts made it too expensive to be commercialized, and then it was found that transition metal carbides (tungsten, molybdenum, vanadium) have platinum-like properties, and their use in catalyst materials can reduce the amount of Pt used. The reduction of the cost of the catalyst ma...

Claims

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Application Information

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IPC IPC(8): C01B31/30C01B31/04B82Y30/00C01B32/205C01B32/90
Inventor 付宏刚穆光王蕾尹婕于鹏田国徽
Owner HEILONGJIANG UNIV
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