Preparation method of porous cobaltosic oxide nanosheet

A technology of cobalt trioxide nanometer and cobalt salt, which is applied in the direction of cobalt oxide/cobalt hydroxide and nanotechnology, which can solve the problems of complex synthesis process and limitation of large-scale application of cobalt tetraoxide nanosheets, and meet the requirements of simple equipment, shortened transmission distance, and raw materials Effects from a wide range of sources

Active Publication Date: 2019-03-26
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods reported above may require expensive raw materials or complex synthesis processes, which limit the large-scale application of cobalt tetraoxide nanosheets

Method used

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  • Preparation method of porous cobaltosic oxide nanosheet
  • Preparation method of porous cobaltosic oxide nanosheet
  • Preparation method of porous cobaltosic oxide nanosheet

Examples

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Embodiment 1

[0044] Take corn stalks and peel off the outer skin, and crush the inner pulp into small particles. Take 1g of crushed corn stalk particles, treat with 200mL of 1.5% dilute sulfuric acid, heat in an oil bath to 95°C, stir for 1h, wash until neutral, filter, blow dry at 40°C for 24h, and set aside. Weigh 0.996 g of cobalt acetate tetrahydrate, add 35 mL of distilled water, and 5 mL of ethanol to prepare a 100 mmol / L cobalt acetate solution. Weigh 0.2 g of acid-treated corn stalk particles into a 100 mL round-bottomed flask, add 40 mL of prepared cobalt acetate solution, sonicate at room temperature for 30 min, vacuum at -0.09 MPa for 30 min, and then sonicate again for 30 min. Suction filtration and drying at 60°C for 12h. The dried corn stalk particles were roasted in a tube furnace under an argon atmosphere, the heating rate was 5°C / min, the roasting temperature was 600°C, and the roasting time was 4h. After cooling, grind to obtain metal cobalt nanocrystal / mesoporous carbo...

Embodiment 2

[0051] Take corn stalks and peel off the outer skin, and crush the inner pulp into small particles. Take 1g of crushed corn stalk particles, treat with 200mL of 1.5% dilute sulfuric acid, heat in an oil bath to 95°C, stir for 1h, wash until neutral, filter, blow dry at 40°C for 24h, and set aside. Weigh 0.996 g of cobalt acetate tetrahydrate, add 35 mL of distilled water, and 5 mL of ethanol to prepare a 100 mmol / L cobalt acetate solution. Weigh 0.2 g of acid-treated corn stalk particles into a 100 mL round-bottomed flask, add 40 mL of prepared cobalt acetate solution, sonicate at room temperature for 30 min, vacuum at -0.09 MPa for 30 min, and then sonicate again for 30 min. Suction filtration and drying at 60°C for 12h. The dried corn stalk particles were roasted in a tube furnace under an argon atmosphere, the heating rate was 5°C / min, the roasting temperature was 600°C, and the roasting time was 4h. After cooling, grind to obtain metal cobalt nanocrystal / mesoporous carbo...

Embodiment 3

[0054] Take corn stalks and peel off the outer skin, and crush the inner pulp into small particles. Take 1g of crushed corn stalk particles, treat with 200mL of 1.5% dilute sulfuric acid, heat in an oil bath to 95°C, stir for 1h, wash until neutral, filter, blow dry at 40°C for 24h, and set aside. Weigh 0.996 g of cobalt acetate tetrahydrate, add 35 mL of distilled water, and 5 mL of ethanol to prepare a 100 mmol / L cobalt acetate solution. Weigh 0.2 g of acid-treated corn stalk particles into a 100 mL round-bottomed flask, add 40 mL of prepared cobalt acetate solution, sonicate at room temperature for 30 min, vacuum at -0.09 MPa for 30 min, and then sonicate again for 30 min. Suction filtration and drying at 60°C for 12h. The dried corn stalk particles were roasted in a tube furnace under an argon atmosphere, the heating rate was 5°C / min, the roasting temperature was 600°C, and the roasting time was 4h. After cooling, grind to obtain metal cobalt nanocrystal / mesoporous carbo...

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Abstract

The invention discloses a preparation method of a porous cobaltosic oxide nanosheet. By utilizing plant straws as a carbon source, so that the raw material source is wide, and the cost is low; the porous cobaltosic oxide nanosheet is prepared by virtue of an impregnation method and a secondary roasting method, the prepared porous cobaltosic oxide nanosheet is formed by Co3O4 nanocrystals with a good crystallization property, and the particle sizes of the Co3O4 nanocrystals are 5nm-20nm, so that the nanosheet has a relatively large specific surface area and rich pore structures. The porous cobaltosic oxide nanosheet has the advantages of high volume and long service life when being applied to supercapacitors.

Description

technical field [0001] The invention belongs to the field of synthesis and application of inorganic nanomaterials, and in particular relates to a preparation method of porous cobalt trioxide nanosheets. Background technique [0002] With the rapid development of social economy, energy shortage and environmental pollution have increasingly become the focus of attention in the world. In order to cope with the increasingly serious energy and environmental crisis, human beings urgently need to develop new clean and renewable energy sources and efficient energy storage devices. As a green and environmentally friendly energy storage device, supercapacitors are favored due to their high power density and stable cycle performance. For electrochemical energy storage devices, the electrode is the core component, and the electrode material determines the performance of the device. Therefore, it is of great significance to design and develop high-performance electrode materials. Coba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G51/04B82Y40/00
CPCB82Y40/00C01G51/04C01P2002/72C01P2004/04C01P2004/64C01P2006/17C01P2006/40
Inventor 王连邦苏利伟黑金培吴昊
Owner ZHEJIANG UNIV OF TECH
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