In-situ synchronous synthesizing method of tungsten carbide/graphitic carbon nano complexes

A nano-composite, tungsten carbide technology, applied in the direction of carbide, tungsten/molybdenum carbide, etc., can solve the problem of uneven distribution of tungsten carbide, and achieve cheap carbon source, lower production cost, and less environmental pollution. Effect

Active Publication Date: 2009-06-17
佛山市菲玛斯新材料科技有限公司
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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of uneven distribution of tungsten carbide in the preparation of tungsten carbide / graphite carbon nanocomposites in the prior art; and to provide a method for synchronously synthesizing tungsten carbide / graphite carbon nanocomposites

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  • In-situ synchronous synthesizing method of tungsten carbide/graphitic carbon nano complexes
  • In-situ synchronous synthesizing method of tungsten carbide/graphitic carbon nano complexes
  • In-situ synchronous synthesizing method of tungsten carbide/graphitic carbon nano complexes

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specific Embodiment approach 1

[0016] Specific embodiment 1: The method for in-situ synchronous synthesis of tungsten carbide / graphite carbon nanocomposites in this embodiment is completed by the following steps: 1. Pretreating the carbon source for 10 minutes to 8 hours (the purpose is to activate the carbon source); 2. Dissolve the graphitization catalyst and tungsten source in the solvent, wherein the concentration of the graphitization catalyst is 0.01-0.3mol / L, the concentration of the tungsten source is 0.01-0.3mol / L, then add the pretreated carbon source, and then disperse evenly , the mass ratio of the carbon source to the graphitization catalyst is 0.01-1:1; 3. Pre-carbonize the mixture of step 2 for 1-12 hours in an atmosphere of air or oxygen at a pre-carbonization temperature of 90-450° C.; The heating rate of 25°C / min is raised from room temperature to the heat treatment temperature of 500-1600°C, and then the product of step 3 is heat-treated for 10min-10h, the flow rate of the heat treatment a...

specific Embodiment approach 2

[0018] Embodiment 2: This embodiment differs from Embodiment 1 in that: the pretreatment time in step 1 is 30 minutes to 6 hours. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0019] Embodiment 3: This embodiment is different from Embodiment 1 in that: the pretreatment time in step 1 is 1 to 4 hours. Other steps and parameters are the same as those in Embodiment 1.

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Abstract

The invention relates to a method for synthesizing a tungsten carbide / graphite carbon nano composition through in-situ synchronization, which relates to a method for preparing the tungsten carbide / graphite carbon nano composite. The method solves the problem of nonuniform tungsten carbide distribution in the prior art for preparing the tungsten carbide / graphite carbon nano composite. The method comprises: firstly, pretreatment of carbon sources; secondly, dissolution of a graphitized catalyst and tungsten sources into a solvent, addition of the pretreated carbon sources, and dispersion; thirdly, pre-carbonization; fourthly, heat treatment; fifthly, acid treatment; and sixthly, physical activation or chemical activation. The method has the advantages of simple technology, uniform tungsten carbide distribution, small environmental pollution, low cost and simple required equipment, and is easy to realize commercialization.

Description

technical field [0001] The invention relates to a preparation method of a tungsten carbide / graphite carbon nanocomposite. Background technique [0002] At present, the preparation of tungsten carbide / graphite carbon nanocomposites mainly adopts a two-step method: the first step is to prepare graphite carbon, and the second step is to adsorb the precursor of tungsten source on the surface of graphite carbon, and obtain carbonized A composite of tungsten and graphitic carbon. However, this preparation method is complex, and the distribution of tungsten carbide on the graphitic carbon is uneven, which affects its catalytic performance, and it is difficult to be applied commercially. Contents of the invention [0003] The purpose of the present invention is to solve the problem of uneven distribution of tungsten carbide in the preparation of tungsten carbide / graphite carbon nanocomposites in the prior art; and to provide a method for in-situ synchronous synthesis of tungsten ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02C01B31/34C01B32/949
Inventor 付宏刚王蕾王瑞红王宝丽田春贵田国辉
Owner 佛山市菲玛斯新材料科技有限公司
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