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Controllable synthetic method of graphitized carbon spheres with hollow structure

A synthesis method and hollow structure technology, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., to achieve the effects of cost reduction, high purity, and uniform morphology

Inactive Publication Date: 2013-07-10
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the carbon spheres obtained by this synthesis method do not have graphitic carbon

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030]Example 1: First, 4.0 grams of glucose, 0.21 grams of sodium stannate, and 0.22 grams of ferric chloride were dissolved in 40 milliliters of deionized water in a molar ratio of 25:1:1, stirred evenly, and moved into a 50 milliliter hydrothermal reaction kettle After reacting at 160° C. for 15 hours, the reaction product was filtered, and washed with 25° C. deionized water to remove impurities. After the reaction product was vacuum-dried at 70°C for 12 hours, it was placed in a high-temperature tube furnace and heated at 1000°C for 2 hours at a heating rate of 5°C per minute, with a nitrogen flow rate of 30 milliliters per minute. After naturally cooling to room temperature, pass 12mol / L hydrochloric acid 25 DEG C of immersing 12 hours and remove tin and iron, obtain the graphitized carbon sphere with hollow structure, its outer diameter 224 nanometers, inner diameter 140 nanometers, the ratio of outer diameter / inner diameter is 1.6, carbon shell pore size (0.7 nanometer...

Embodiment 2

[0036] Example 2: First, 4.0 grams of glucose, 0.21 grams of sodium stannate, and 0.22 grams of ferric chloride were dissolved in 40 milliliters of deionized water in a molar ratio of 25:1:1, stirred evenly, and moved into a 50 milliliter hydrothermal reaction kettle After reacting at 160° C. for 3 hours, the reaction product was filtered and washed with 25° C. deionized water to remove impurities. After the reaction product was vacuum-dried at 100°C for 4 hours, it was placed in a high-temperature tube furnace and heated at 1000°C for 2 hours at a heating rate of 5°C per minute, with a nitrogen flow rate of 30 milliliters per minute. After naturally cooling to room temperature, pass through 12mol / L hydrochloric acid 25 DEG C of immersing 12 hours and remove tin and iron, obtain the graphitized carbon sphere with hollow structure, its outer diameter 94 nanometers, inner diameter 71 nanometers, the ratio of outer diameter / inner diameter is 1.3, carbon shell micropore size (0.7 ...

Embodiment 3

[0037] Example 3: First, 4.0 grams of glucose, 0.21 grams of sodium stannate, and 0.22 grams of ferric chloride were dissolved in 40 milliliters of deionized water in a molar ratio of 25:1:1, stirred evenly, and moved into a 50 milliliter hydrothermal reaction kettle After reacting at 160° C. for 9 hours, the reaction product was filtered and washed with 50° C. deionized water to remove impurities. After the reaction product was vacuum-dried at 100°C for 4 hours, it was placed in a high-temperature tube furnace and heated at 1000°C for 2 hours at a heating rate of 5°C per minute, with a nitrogen flow rate of 30 milliliters per minute. After naturally cooling to room temperature, pass through 12mol / L hydrochloric acid 25 DEG C of soaking 12 hours and remove tin and iron, obtain the graphitized carbon sphere with hollow structure, its outer diameter 125 nanometers, inner diameter 104 nanometers, the ratio of outer diameter / inner diameter is 1.2, carbon shell micropore size (0.7 ...

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Abstract

The invention provides a controllable synthetic method of graphitized carbon spheres with a hollow structure. The controllable synthetic method comprises the following steps of: (1) dissolving a carbon source, soluble metal salts and a catalyst in deionized water according to proportioning, stirring till completely dissolving, transferring to a hydrothermal reaction kettle for hydro-thermal synthesis, and washing, filtering and drying precipitates to obtain primary products; (2) reducing the primary products at a high temperature in a high-temperature reaction furnace under the production of gas; and (3) placing the products obtained through reduction in an acid solution for soaking, and washing, filtering and drying to obtain the graphitizing carbon spheres with the hollow structure. The graphitizing carbon spheres with the hollow structure have the advantages that the morphology is uniform, the carbon shells are of microcellular structures, the interiors of the carbon spheres are of mesoporous support structures, the graphitization degree is good, and the like. The graphitizing carbon spheres can be used in numerous fields of high-efficiency catalytic conversion, energy source storage and transition, medicine release control, matter adsorption and separation and the like. An invented formwork-free hydrothermal synthesis technology is simple and controlled and can be used for large-scale production.

Description

technical field [0001] The invention relates to a synthesis method of nanometer hollow carbon spheres, in particular to a controllable synthesis method of graphitized carbon spheres with a hollow structure. Background technique [0002] Nano hollow carbon sphere is a special carbon material with high chemical stability, low density, good thermal stability and biocompatibility, not only can be used as electrode material, catalyst carrier, gas storage medium, lubrication It is also used as dyes, rubber reinforcement materials, lightweight structural materials and many other fields, attracting more and more attention. [0003] At present, hollow carbon spheres are mainly prepared by pyrolysis of organic matter, chemical vapor deposition, dielectric reduction, laser distillation, arc discharge, template self-assembly and other methods. These methods are usually carried out under high temperature conditions, the reaction time is long, the energy consumption is large, not only th...

Claims

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Application Information

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IPC IPC(8): C01B31/04B82Y40/00B82Y30/00C01B32/205
Inventor 尹诗斌罗林黄飞闫爱华
Owner CHINA UNIV OF MINING & TECH
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