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Micrometer carbon spheres and preparation method thereof

A carbon ball and surfactant technology, applied in the field of materials, can solve the problems of complex carbon ball process, high raw material waste rate, low product yield, etc., and achieve the effects of simple preparation process, easy centrifugal separation, and high yield

Pending Publication Date: 2019-02-12
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The manufacture of these carbon spheres has problems such as complicated process, high waste rate of raw materials, and low product yield. For example, the active metal reduction method requires a protective atmosphere; the plasma method, CVD method, and ultrasonic pyrolysis method all require the use of expensive and complicated equipment; Micron-sized elliptical hard carbon spheres obtained by polymer-catalyzed pyrolysis

Method used

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  • Micrometer carbon spheres and preparation method thereof
  • Micrometer carbon spheres and preparation method thereof
  • Micrometer carbon spheres and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] This embodiment provides a preparation method of micron carbon spheres, comprising the following steps:

[0036] (1) Add 6g of glucose into 40ml of water, stir until dissolved, then add 50mg of sodium dodecylsulfonate, stir for 15min to mix evenly, and obtain a mixed solution;

[0037] (2) Move the mixed solution described in step (1) into a hydrothermal reaction kettle, and conduct a hydrothermal reaction at 160°C for 9 hours. After cooling to room temperature, centrifuge at a speed of 5000r / min for 6 minutes, and then wash with absolute ethanol first. Then wash with deionized water until the supernatant obtained by centrifugation after washing is clear, and dry the solid obtained after centrifugation in a vacuum oven at 80°C for 8 hours to obtain the particle size distribution between 0.489 and 0.678 μm micron carbon spheres, see figure 1 , the particle size distribution of carbon spheres is uniform, and it is an interconnected carbon sphere that is easy to be centri...

Embodiment 2

[0039] This embodiment provides a preparation method of micron carbon spheres, comprising the following steps:

[0040] (1) Add 6g of glucose into 40ml of water, stir until dissolved, then add 50mg of sodium dodecylsulfonate, stir for 15min to mix evenly, and obtain a mixed solution;

[0041] (2) Transfer the mixed solution described in step (1) into a hydrothermal reaction kettle, and conduct a hydrothermal reaction at 160°C for 11 hours. After cooling to room temperature, centrifuge at a speed of 5000r / min for 6 minutes, and then wash with absolute ethanol first. Then wash with deionized water until the supernatant obtained by centrifugation after washing is clear, and dry the solid obtained after centrifugation in a vacuum oven at 80°C for 8 hours to obtain the particle size distribution between 0.662 and 0.714 μm micron carbon spheres, see figure 2 , image 3 , the particle size distribution of carbon spheres is uniform, and it is an interconnected carbon sphere that is...

Embodiment 3

[0043] This embodiment provides a preparation method of micron carbon spheres, comprising the following steps:

[0044] (1) Add 6 g of glucose into 40 ml of water, stir until dissolved, then add 50 mg of sodium dodecylsulfonate, stir for 15 min, then add 300 mg of cetyltrimethylammonium bromide, and continue stirring for 30 min to obtain a mixed solution;

[0045] (2) Move the mixed solution described in step (1) into a hydrothermal reaction kettle, react hydrothermally at 180°C for 8h, cool to room temperature, centrifuge at a speed of 5000r / min for 8min, and then wash with absolute ethanol first, Then wash with deionized water until the supernatant obtained by centrifugation after washing is clarified, and dry the solid obtained after centrifugation in a vacuum oven at 80°C for 8 hours to obtain the particle size distribution between 0.213 and 0.386 μm micron carbon spheres, see Figure 4 , Figure 5 , the particle size distribution of carbon spheres is uniform, and it is ...

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Abstract

The invention relates to micrometer carbon spheres and a preparation method thereof. The preparation method adopts glucose as a carbon source, adopts sodium dodecyl sulfate and / or cetyl trimethyl ammonium bromide as a surfactant, by utilizing the surfactant, vesicae can be formed in an aqueous solution, wherein the micrometer carbon spheres grow and are formed in the vesicae; the particle size ofthe micrometer carbon sphere depends on the size of the vesicae, so that the particle size of the finally generated micrometer carbon spheres can be adjusted by adjusting the surfactant. Compared withthe traditional process, the micrometer carbon spheres are simple in preparation process, high in controllability, good in repetition, pollution-free and environmentally friendly; the preparation method provided by the invention is high in yield, the yield can reach 20 percent or above; the mass production is feasible, and the prepared micrometer carbon spheres are easy to be centrifugally separated; the raw materials are low in cost and easy to obtain; the micrometer carbon spheres prepared by virtue of the method provided by the invention can be widely applied to the fields such as catalystcarriers, medicine transportation, pollutant adsorption, fuel cells, supercapacitors and lithium ion battery electrode materials.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a micron carbon sphere and a preparation method thereof. Background technique [0002] As a new type of functional carbon material, carbon spheres have the advantages of good chemical stability, thermal stability, excellent electrical and thermal conductivity, good intrinsic damping, large specific surface area, and low density. The spherical structure makes it a material with broad application prospects. At present, nano-micron carbon spheres have been widely used in the fields of catalyst carrier, drug delivery, pollutant adsorption, fuel cell, supercapacitor and lithium-ion battery electrode material. [0003] At present, a variety of methods for preparing carbon spheres have been studied, such as hydrothermal method, active metal reduction method, chemical vapor deposition method, plasma method, polymer catalytic pyrolysis method, ultrasonic pyrolysis method, e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05
CPCC01B32/05
Inventor 王磊刘勇杨宇韩吉姝刘艳茹宗玲博
Owner QINGDAO UNIV OF SCI & TECH
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