Method for preparing nitrogenous graphitized hollow carbon microspheres

A technology of graphitization and hollow carbon, applied in chemical instruments and methods, inorganic chemistry, carbon compounds, etc., can solve the problems of cost increase and complicated preparation process, and achieve the effect of low cost, simple preparation process and easy mass production

Inactive Publication Date: 2012-08-15
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 technical problems that the existing preparation method of nitrogen-containing graphitized hollow carbon microspheres makes the pr

Method used

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  • Method for preparing nitrogenous graphitized hollow carbon microspheres
  • Method for preparing nitrogenous graphitized hollow carbon microspheres
  • Method for preparing nitrogenous graphitized hollow carbon microspheres

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specific Embodiment approach 1

[0017] Embodiment one: the preparation method of the nitrogen-containing graphitized hollow carbon microspheres of the present embodiment is carried out according to the following steps:

[0018] 1. Add melamine powder and formaldehyde solution with a mass concentration of 37% into deionized water, adjust the pH value to 5.5-9.0, then heat to 40-60°C and stir for 10min-30min, then heat up to 80-90°C and let stand Set aside for 10min to 30min to obtain a reaction liquid; wherein the molar ratio of melamine to formaldehyde is (1.5 to 6): 1;

[0019] 2. Transfer the reaction liquid obtained in step 1 to a stainless steel hydrothermal reaction kettle lined with polytetrafluoroethylene, seal it, and put it in an oven with a temperature of 120-200°C for 3-12 hours, take out the reaction kettle and let it cool naturally Cooling to room temperature, centrifuging the obtained product, washing the solid phase with deionized water and absolute ethanol in turn, and drying at room temperat...

specific Embodiment approach 2

[0022] Embodiment 2: This embodiment differs from Embodiment 1 in that the mass percentage of nitrogen in the high-purity nitrogen described in step 3 is ≥99.99%. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0023] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that in step one, melamine powder and a formaldehyde solution with a mass concentration of 37% are added to deionized water, heated to 45-55°C and stirred for 15min- After 25 minutes, the temperature was raised to 82-87°C and allowed to stand for 15-25 minutes to obtain a reaction solution. Others are the same as in the first or second embodiment.

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Abstract

The invention relates to a method for preparing nitrogenous graphitized hollow carbon microspheres, which relates to a method for preparing hollow carbon microspheres. The method disclosed by the invention aims to solve the technical problem that in the existing method for preparing nitrogenous graphitized hollow carbon microspheres, because a template agent is utilized, the preparation process is complicated, and the cost is increased. The method comprises the following steps: adding melamine powder and a formaldehyde solution into deionized water, and after heating for reaction, obtaining reaction liquid; then, transferring the reaction liquid into a reaction kettle, and after carrying out hydrothermal reaction on the reaction liquid, obtaining melamine resin microspheres; and putting the melamine resin microspheres into a quartz tube type furnace, and heating the melamine resin microspheres so as to split the melamine resin microspheres, thereby obtaining nitrogenous graphitized hollow carbon microspheres. The average diameter of the nitrogenous graphitized hollow carbon microspheres is 1-5 microns; and by using the method, no template agent and no catalyst are required to be added in the preparation process, the preparation process in a synthesis method is simple, the cost is low, and microspheres are easy to be performed mass production and can be used as electrode materials or carrier materials of active substances of electrodes in the fields of electrochemical super capacitors, lithium ion batteries, fuel cells and the like.

Description

technical field [0001] The invention relates to a preparation method of hollow carbon microspheres. Background technique [0002] Graphitized carbon hollow spheres have attracted extensive attention from researchers because of their low density, good stability, and fillable hollow structures. The special composition and microstructure of nitrogen-containing graphitized hollow carbon microspheres show good application prospects in many aspects such as new energy, biomedicine, and environmental pollution control. The existing methods for preparing nitrogen-containing graphitized hollow carbon microspheres all use template method to first synthesize resin microspheres, and then obtain the final product through thermal cracking. The introduction of the template not only complicates the preparation process and increases the preparation cost, but also easily causes environmental pollution in the subsequent process of removing the template. Therefore, it is particularly necessary...

Claims

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Application Information

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IPC IPC(8): H01G9/042H01M4/38H01M4/66C01B31/04C01B32/205
CPCY02E60/10Y02E60/13
Inventor 赵辉马方伟孙丽萍李强霍丽华
Owner HEILONGJIANG UNIV
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