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Starch-based hollow porous carbon microsphere and preparation method thereof

A technology of carbon microspheres and starch, which is applied in the field of porous carbon materials, can solve the problems of difficult batch production and popularization and application, complex preparation process, high production cost, etc., and achieve the effect of reusable loss, simple preparation process and low cost

Active Publication Date: 2014-09-17
GUANGXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation of porous carbon microspheres by the template method is complex in process, high in cost, and low in yield, making it difficult to mass-produce and popularize and apply; the preparation of carbon spheres by the arc method has low yield, complicated preparation process, and high production cost; hydrothermal and chemical Methods such as vapor deposition have disadvantages such as high cost, complicated operation, harsh conditions, and low yield, and the prepared carbon spheres have many shortcomings such as small particle size, inhomogeneity, and poor dispersion, which are greatly restricted.

Method used

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  • Starch-based hollow porous carbon microsphere and preparation method thereof

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Embodiment 1

[0019] A starch-based porous hollow carbon microsphere, the shape of the carbon microsphere is spherical, the particle size of the particle is 0.5-30 μm, and the specific surface area is 300-1000 m 2 / g, the porosity is 40~70%, and the microspheres contain a large number of nanopores with a pore size of 5~200nm.

[0020] A preparation method of starch-based porous hollow carbon microspheres, the specific steps are as follows:

[0021] 1) The mass ratio of nickel to starch is 0.5~0.01, and the mass ratio of water to starch is 0.01~1. Dissolve organic nickel salt in water, add starch, and stir and mix organic nickel salt and Starch, dried at 40°C to obtain precursor powder;

[0022] 2) The precursor powder is roasted and carbonized in a nitrogen protective atmosphere, and then catalyzed and graphitized to obtain a hollow carbon microsphere composite material with catalytic metal attached;

[0023] 3) The prepared composite material was washed repeatedly with hydrochloric acid...

Embodiment 2

[0025] A starch-based porous hollow carbon microsphere, the shape of the carbon microsphere is spherical, the particle size of the particle is 0.5-30 μm, and the specific surface area is 300-1000 m 2 / g, the porosity is 40~70%, and the microspheres contain a large number of nanopores with a pore size of 5~200nm.

[0026] A preparation method of starch-based porous hollow carbon microspheres, the specific steps are as follows:

[0027] 1) According to the ratio of organic nickel salt to starch mass ratio of 1~1, water to starch mass ratio of 1~1, dissolve organic nickel salt in water, add starch, and stir and mix organic nickel salt under the condition of constant temperature water bath Salt and starch, dried at 40°C to obtain precursor powder;

[0028] 2) The precursor powder is roasted and carbonized in a nitrogen protective atmosphere, and then catalyzed and graphitized to obtain a hollow carbon microsphere composite material with catalytic metal attached;

[0029] 3) The ...

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Abstract

The invention discloses a starch-based hollow porous carbon microsphere and a preparation method thereof, belonging to the technical field of porous carbon material preparation. The preparation method comprises the steps of: with starch as a precursor, dispersing a catalyst in the precursor, carrying out carbonization catalysis, and cleaning the metal catalyst to realize the preparation of the porous carbon microsphere. The porous carbon microsphere prepared by using the method is of a hollow porous structure, has the specific surface area of 300-1000m<2> / g and the porosity of 40-70% and contains a great number of nanometer holes with the aperture of 5-200nm. The method has the characteristics of simple process, low cost, short production period, easiness for mass production, catalyst recycling and the like; in addition, raw materials are pollution-free, renewable, wide in source, low in cost and high in carbon content.

Description

technical field [0001] The invention belongs to the field of porous carbon materials, and specifically relates to a starch-based porous hollow carbon microsphere and a preparation method thereof. Background technique [0002] Since the invention of fullerenes and carbon nanotubes, comprehensive research on carbon materials has been conducted worldwide. Due to its excellent high thermal conductivity, high heat resistance, good chemical inertness and high electrical conductivity, carbon materials are widely used in many national economic fields such as energy, chemical industry, environmental protection, electronics and aerospace. Carbon materials with different morphologies have potential applications in many aspects and have attracted extensive attention. Porous carbon microspheres have a unique porous spherical structure. Due to their high chemical stability, good high temperature resistance, excellent electrical and thermal conductivity, large specific surface area, excel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02
CPCY02P20/584
Inventor 李庆余张晓辉王红强张东材吴永生赖飞燕黄有国吴强
Owner GUANGXI NORMAL UNIV
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