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Self-template method for preparing hollow carbon spheres

A self-template and hollow technology, which is applied in the field of self-template preparation of hollow carbon spheres, achieves the effects of controllable pore size, easy batch preparation and abundant raw material sources.

Inactive Publication Date: 2018-02-09
ZHONGYUAN ENGINEERING COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention proposes a method for preparing hollow carbon spheres from a template, which solves the problems of using toxic reagents and catalysts and adding a large amount of surfactants in the prior art

Method used

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  • Self-template method for preparing hollow carbon spheres
  • Self-template method for preparing hollow carbon spheres
  • Self-template method for preparing hollow carbon spheres

Examples

Experimental program
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Effect test

Embodiment 1

[0026] In a 250 mL dry flask, add 100 mL of acetonitrile, weigh 0.12 g of hexachlorocyclotriphosphazene and 0.09 g of phloroglucinol, mix well, add 1 g of triethylamine to it, seal the flask immediately, and store at 30 °C The reaction was carried out in an ultrasonic cleaner (150 W, 40 kHz) for 2 hours in a water bath. Centrifuge after the reaction, and wash the centrifuged product with ethanol and deionized water for 3 to 4 times, and finally dry the product in vacuum at 60°C for 24 hours to obtain solid polyphosphazene microspheres.

[0027] The obtained solid polyphosphazene microspheres were placed in a porcelain boat and sent to a carbonization furnace. Firstly, an inert gas was passed through for 1 hour to remove the air in the carbonization furnace. Hours, then continue to heat up to 900 °C, keep warm for 3 hours and then cool down to room temperature naturally to obtain mesoporous-rich hollow carbon spheres. The characterization results show that the prepared hollow ...

Embodiment 2

[0034] In a 150 mL dry flask, add 100 mL of acetonitrile, weigh 0.12 g of hexachlorocyclotriphosphazene and 0.09 g of phloroglucinol, mix well, add 1 g of triethylamine to it, immediately seal the flask, and store at 30 °C React in an ultrasonic bath (150 W, 40 kHz) for 1 hour. Centrifuge after the reaction, and wash the centrifuged product with ethanol and deionized water for 3 to 4 times, and finally dry the product in vacuum at 60°C for 24 hours to obtain solid polyphosphazene microspheres.

[0035] The obtained solid polyphosphazene microspheres were placed in a porcelain boat and sent to a carbonization furnace. Firstly, an inert gas was passed through for 1 hour to remove the air in the carbonization furnace. Hours, then continue to heat up to 850 °C, keep warm for 3 hours and then cool down to room temperature naturally to obtain mesoporous-rich hollow carbon spheres. The characterization results show that the prepared hollow carbon spheres have an average particle siz...

Embodiment 3

[0037]In a 150 mL dry flask, add 100 mL of acetonitrile, weigh 0.12 g of hexachlorocyclotriphosphazene and 0.09 g of phloroglucinol, mix well, add 1 g of triethylamine to it, seal the flask immediately, and store at 30 °C The reaction was carried out in an ultrasonic cleaner (150W, 40 kHz) for 2 hours in a water bath. Centrifuge after the reaction, and wash the centrifuged product with ethanol and deionized water for 3 to 4 times, and finally dry the product in vacuum at 60°C for 24 hours to obtain solid polyphosphazene microspheres.

[0038] The obtained solid polyphosphazene microspheres were placed in a porcelain boat and sent to a carbonization furnace. Firstly, an inert gas was passed through for 1 hour to remove the air in the carbonization furnace, and then the temperature was slowly raised to 850 °C at a rate of 1 °C / min. After 3 hours, the temperature was naturally cooled to room temperature to obtain mesoporous-rich hollow carbon spheres. The characterization result...

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Abstract

The invention provides a self-template method for preparing hollow carbon spheres. The method comprises the steps as follows: phosphonitrilic chloride trimer and a comonomer are dispersed in an organic solvent, then an acid-binding agent is added, the mixture reacts under the ultrasonic assistance condition for 2-6 h, after the reaction ends, centrifugation and washing are performed, and solid polyphosphazene microspheres are obtained; the polyphosphazene microspheres are transferred to a carbonization furnace and calcined at the high temperature under the shielding of inert gas, and the hollow carbon spheres are obtained. The hollow carbon spheres with good monodispersity, uniform particle size and controllable wall thickness and particle size are prepared quickly with the self-template method. No additional templates are required in the whole preparation process, and the preparation method is simple and environmentally friendly and facilitates mass production.

Description

technical field [0001] The invention relates to the field of material preparation, in particular to a method for preparing hollow carbon spheres from templates. Background technique [0002] Carbon micro-nano materials have the characteristics of rich pores, high specific surface area, and good stability. Therefore, they have broad application prospects in catalysis, adsorption, and energy storage fields such as supercapacitors and lithium-ion batteries, and have always attracted the research interest of researchers. Especially hollow carbon spheres have a unique cavity structure and higher specific surface area, so the preparation and application of hollow carbon spheres have attracted widespread attention. [0003] At present, people have developed a variety of methods for preparing hollow carbon spheres, such as chemical vapor deposition, hydrothermal method, and template method, especially the template method, which is often used as a wide method to prepare hollow carbon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05
Inventor 王明环王少博岳献阳于保康
Owner ZHONGYUAN ENGINEERING COLLEGE
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