Preparation method of layered porous carbon particles in yolk-shell structure

A technology of hierarchical porous carbon and core-shell structure, applied in the preparation of microspheres, nanocarbons, microcapsule preparations, etc., can solve problems such as industrialization difficulties and cumbersome processes, and achieve the effect of simple equipment, simple process, and uniform appearance

Inactive Publication Date: 2012-10-10
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the synthesis of yolk-eggshell nanoparticles is mainly inorganic-inorganic or inorganic-organic yolk-eggshell nanoparticles, while carbon-carbon yolk-eggshell micro-nanoparticles have not been reported.
In addition, the current preparation methods for the preparation of egg yolk-eggshell micro-nanoparticles are difficult to industrialize and the process is cumbersome.

Method used

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  • Preparation method of layered porous carbon particles in yolk-shell structure
  • Preparation method of layered porous carbon particles in yolk-shell structure
  • Preparation method of layered porous carbon particles in yolk-shell structure

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Preparation of egg yolk-eggshell structured carbon micro-nano particles. Weigh 3.88g resorcinol, 5.2ml formaldehyde, mix and stir for 1 hour, add 30ml deionized water, mix and stir for 2 hours to form a uniform carbon precursor solution , Measure 15ml of polystyrene hollow microspheres, stir and mix at room temperature for 24 hours. Wash by centrifugation for 3 times, add 15ml of water and then add acetic acid to stir and mix evenly, leave it at room temperature for 12 hours, and wash by centrifugation to obtain particles with a core-shell structure. Weigh 7.76g resorcinol, 11ml formaldehyde, mix and stir for 1 hour, add 60ml deionized water, add 1ml sodium hydroxide 1mol / L, mix and stir for 5 hours to form a uniform carbon precursor solution , after reacting for 6 hours, centrifuge and wash 3 times to obtain micro-nano particles with core-shell structure, dry them at 60°C, put the powder into a high-temperature atmosphere furnace, and pass argon gas at a rate of 0.1...

Embodiment 2

[0027] Preparation of egg yolk-eggshell structure micro-nano carbon particles. Weigh 7.76g resorcinol, 11ml formaldehyde, mix and stir for 1 hour, add 30ml deionized water, mix and stir for 2 hours to form a uniform carbon precursor solution , Measure 15ml of polystyrene hollow microspheres, stir and mix at room temperature for 24 hours. Wash by centrifugation for 3 times, add 15ml of water and then add acetic acid to stir and mix evenly, leave it at room temperature for 12 hours, and wash by centrifugation for 2 times to obtain particles with a core-shell structure. Weigh 7.76g resorcinol, 11ml formaldehyde, mix and stir for 1 hour, add 60ml deionized water, add 1ml sodium hydroxide 1mol / L, mix and stir for 5 hours to form a uniform carbon precursor solution , after reacting for 6 hours, centrifuge and wash 3 times to obtain micro-nano particles with core-shell structure, dry them at 60°C, put the powder into a high-temperature atmosphere furnace, and pass argon gas at a r...

Embodiment 3

[0030] Preparation of egg yolk-eggshell structure micro-nano carbon particles. Weigh 3.88g resorcinol, 5.2ml formaldehyde, mix and stir for 1 hour, add 15ml deionized water, mix and stir for 2 hours to form a uniform carbon precursor solution , Measure 15ml of polystyrene hollow microspheres, stir and mix at room temperature for 24 hours. Wash by centrifugation for 3 times, add 15ml of water and then add sulfuric acid to stir and mix evenly, leave it at room temperature for 12 hours, and wash by centrifugation for 2 times to obtain particles with a core-shell structure. Weigh 7.76g resorcinol, 11ml formaldehyde, mix and stir for 1 hour, add 60ml deionized water, add 1ml sodium hydroxide 1mol / L, mix and stir for 5 hours to form a uniform carbon precursor solution , drop the mixed solution containing the core-shell particles in the carbon precursor solution , after reacting for 6 hours, centrifuge and wash 3 times to obtain micro-nano particles with core-shell structure, dr...

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Abstract

The invention belongs to the field of inorganic nanometer material synthesis and particularly relates to a preparation method of layered porous carbon submicron particles in a yolk-shell structure. According to the preparation method, resorcinol and formaldehyde are used as carbon sources, hollow polystyrene microspheres are used as templates, firstly, a middle shell layer is formed, and then, the resin core and the outermost layer resin shell layer are formed, so a resin-polystyrene resin core-shell-shell sandwich structure is formed, finally, the carbonization and the activation are carried out, and the layered gradient porous carbon submicron particles with the yolk structure appearance are obtained. The particle diameter can be controlled through controlling the grain size dimension of template microspheres, and the hole structure can be controlled through changing the concentration of carbon source precursor solution. The preparation method provided by the invention has the characteristics that the raw material cost is low, the preparation method is simple, and the industrialization is easy to realize.

Description

[0001] technical field [0002] The invention belongs to the field of synthesis of inorganic nanometer materials, in particular to a preparation method of submicron egg yolk-eggshell structured hierarchical porous carbon particles. [0003] technical background [0004] Egg yolk-eggshell nanoparticle has a special structural morphology, which is different from the core-shell micro-nanoparticle. The core in the egg yolk-eggshell nanoparticle can move, and this special structure has special properties. Recently, egg yolk-eggshell nanoparticles have aroused widespread interest, and egg yolk-eggshell nanoparticles have new applications in the fields of catalysis, electrodes, and biopharmaceuticals. Generally, there are several methods for preparing egg yolk-eggshell nanoparticles: 1. By forming particles with a sandwich structure, that is, the core-shell structure; 2. Using the Kirkendall effect or gravity substitution, the core-shell structure is transformed into an ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/02C01B31/02B82Y30/00C01B32/15
Inventor 黄妙逢巨新姜晓萍
Owner UNIV OF SCI & TECH BEIJING
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