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Efficient compounding method for chain-like carbon nanospheres

A technology of carbon nanospheres and synthesis methods, applied in the direction of nanocarbons, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of small yield, high cost, low purity, etc., and achieve The effect of increasing productivity

Inactive Publication Date: 2017-08-25
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a high-efficiency synthesis method of chain-like carbon nanospheres, so as to solve the application problems of the prior art due to the defects of low purity, small yield and high cost of carbon nanospheres. Research and Product Development Bound

Method used

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  • Efficient compounding method for chain-like carbon nanospheres
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Experimental program
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Effect test

Embodiment 1

[0012] Embodiment 1: the first step: at first 1mol FeCl 2 4H 2 0. 1.5mol of citric acid particles were mixed, 100mL of absolute ethanol was added thereto, and the resulting mixture was put into a three-necked bottle and stirred in a water bath at 60°C for 6 hours, then the resulting sol was heat-treated at 80°C in an oven for 6 hours, and then heated to Heat treatment at 150°C until the corresponding xerogel is obtained; heat-treat the obtained xerogel in a high-temperature furnace at 450°C in air for 4 hours to obtain the desired catalyst precursor powder (iron oxide nanoparticles);

[0013] Step 2: Take 50 mg of the synthesized catalyst precursor, spread it in a small porcelain boat and push it into the tubular quartz tube to the position of the thermocouple of the tubular furnace, and raise the reaction temperature from room temperature under the protection of argon. up to 450°C; then turn off the argon and immediately switch to the hydrogen, and reduce the obtained cataly...

Embodiment 2

[0015] CoCl 2 ·6H 2 O was mixed with citric acid particles and absolute ethanol according to the quantity ratio of 1mol:1.5mol:100mL, and after stirring in a water bath at 70°C for 7 hours, the obtained sol was heat-treated at 60°C in an oven for 8 hours, and then heated to 120°C for heat treatment until The corresponding xerogel was obtained; (2) the obtained xerogel was heat-treated at 500°C in the air for 5 hours to obtain the desired catalyst precursor powder; (3) a certain amount of catalyst precursor powder was spread on the small porcelain In the boat, under the protection of argon, the reaction temperature is raised from room temperature to 450°C, the argon is turned off and the hydrogen gas is switched immediately, and the catalyst precursor obtained is reduced by hydrogen at the 450°C for 1-4 hours (4) Warm up to 550-600°C under the protection of argon, and immediately switch to acetylene and water vapor for 2 hours. After cooling to room temperature, a large number...

Embodiment 3

[0017] (1) NiCl 2 ·6H 2 O was mixed with citric acid particles and absolute ethanol according to the quantity ratio of 1mol:1.5mol:100mL, and after stirring in a water bath at 50°C for 5 hours, the obtained sol was heat-treated at 70°C in an oven for 5 hours, and then heated to 130°C for heat treatment until The corresponding xerogel was obtained; (2) the obtained xerogel was heat-treated at 430°C in the air for 3 hours to obtain the desired catalyst precursor powder; (3) a certain amount of catalyst precursor powder was spread on the small porcelain In the boat, under the protection of argon, the reaction temperature is raised from room temperature to a specific temperature of 375°C, the argon is turned off and the hydrogen gas is switched immediately, and the obtained catalyst precursor is reduced by hydrogen at the specific temperature for 1-4 (4) under the protection of argon, the temperature was raised to 550-600° C., and acetylene and water vapor were immediately switch...

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Abstract

The invention discloses a high-efficiency synthesis method of chain carbon nanospheres, which is characterized by comprising the following steps: (1) FeCl2·4H2O (CoCl2·6H2O or NiCl2·6H2O), citric acid particles and absolute ethanol according to 1 mol : mixing in a quantity ratio of 1.5mol:100mL, after stirring in a water bath, heat treatment of the obtained sol in an oven until a dry gel is obtained; (2) the desired catalyst precursor powder can be obtained after heat treatment of the obtained dry gel; (3) Take a certain amount of catalyst precursor and spread it in a small porcelain boat, under the protection of argon, increase the reaction temperature from room temperature to a specific temperature, turn off the argon and immediately switch to hydrogen, at the specific temperature (3) Turn off the hydrogen and pass in argon to raise the temperature to 550°C. After the temperature is stable, turn off the argon and immediately switch to pass acetylene and water vapor for 2 hours. A large number of black samples were collected after cooling to room temperature under the protection of argon.

Description

technical field [0001] The invention belongs to the preparation technology of carbon nanomaterials, and in particular relates to a high-efficiency synthesis method of chain-like carbon nanospheres. Background technique [0002] In the past few decades, spherical carbon materials such as fullerenes and carbon nano-onions have been extensively studied, but carbon nanospheres were often regarded as by-products of fullerenes and carbon nano-onions in the early days without much in-depth research. Research. In fact, carbon nanospheres are another new type of nano-carbon material after fullerenes and carbon nanotubes. Due to their spherical structure, stable physical and chemical properties, large specific surface area, excellent electromagnetic properties and good biophase Capacitance, etc., making carbon nanospheres and their modified products in lithium-ion batteries, supercapacitors, catalyst supports, composite reinforcements, drug wrapping, hydrogen / methane storage material...

Claims

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Application Information

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IPC IPC(8): C01B32/15B01J23/745B01J23/75B01J23/755B01J37/08B01J37/18
CPCB01J23/75B01J23/745B01J23/755B01J37/088B01J37/18C01P2004/03C01P2004/32C01P2004/50C01P2004/64C01P2006/80
Inventor 祁小四白忠臣秦水介钟伟都有为
Owner GUIZHOU UNIV
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