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Preparation method of cellular starch-based porous carbon material

A honeycomb and carbon material technology, applied in the field of inorganic non-metallic material preparation, can solve the problems of high cost, difficult removal of impurities, difficult synthesis, etc., and achieve the effects of low production cost, low price and simple operation process

Inactive Publication Date: 2015-08-05
ANHUI AGRICULTURAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Traditional synthesis methods usually have problems such as difficult synthesis, high cost and difficult removal of impurities.

Method used

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  • Preparation method of cellular starch-based porous carbon material

Examples

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Embodiment 1

[0020] Under the air atmosphere, add 80 parts of ordinary cornstarch into the heating furnace, raise the heating furnace to 220°C at a heating rate of 10°C / min, and keep the temperature for 24 hours to obtain pre-expanded ordinary cornstarch; The obtained pre-expanded common corn starch was put into a carbonization furnace, and carbonized for 2 hours under a nitrogen atmosphere at 700° C. to obtain a honeycomb-shaped common corn starch porous carbon material. The specific surface area of ​​the porous carbon is 405m 2 / g, the distribution of mesopores is between 5 and 40 nm, and the distribution of macropores is between 50 and 90 μm.

Embodiment 2

[0022] Under the air atmosphere, add 95 parts of potato starch into the heating furnace, raise the heating furnace to 200°C with a heating rate of 15°C / min, and after 18 hours of insulation, pre-expanded potato starch is obtained; Put the pre-expanded potato starch into a carbonization furnace, and conduct carbonization treatment for 1.5 hours under a nitrogen atmosphere at 750°C to obtain a honeycomb-shaped porous carbon material of potato starch. The specific surface area of ​​the porous carbon is 478m 2 / g, the mesopores are distributed between 10-20nm, and the macropores are distributed between 1-80μm.

Embodiment 3

[0024] Under the air atmosphere, add 100 parts of lotus root starch into the heating furnace, raise the heating furnace to 240°C with a heating rate of 20°C / min, and after 36 hours of heat preservation, the pre-expanded lotus root starch is obtained; The pre-expanded lotus root starch is put into a carbonization furnace, and carbonized for 1 hour under a nitrogen atmosphere at 800° C. to obtain a honeycomb-shaped porous carbon material of lotus root starch. The specific surface area of ​​the porous carbon is 380m 2 / g, the mesopores are distributed between 40 and 50 nm, and the macropores are distributed between 70 and 110 μm.

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Abstract

The invention discloses a preparation method of a cellular starch-based porous carbon material. Starch is pre-treated under a certain atmosphere condition so that the starch swells and produces holes, and the pre-treated starch is subjected to charing treatment by a conventional method so that the cellular starch-based porous carbon material is obtained. The preparation method has simple processes, a wide raw material source and a low production cost, realizes industrial production, is suitable for fields of macro-molecule adsorption, catalysis and gas separation and can be used as a microbe propagation and motion carrier.

Description

technical field [0001] The invention relates to a preparation method of a porous carbon material, which belongs to the technical field of preparation of inorganic non-metallic materials, in particular to a preparation method of a honeycomb starch-based porous carbon material. Background technique [0002] Porous carbon material refers to a honeycomb-shaped carbon-based material with different pore structures, and its pore size can range from nano-scale ultra-fine pores equivalent to the size of adsorbed molecules to micron-scale pores suitable for microbial proliferation and activities. internal changes. The pores can be divided into micropores (less than 2nm), mesopores (2-50nm) and macropores (greater than 50nm) according to the pore size. The adsorption performance of porous carbon materials is mainly determined by the number of micropores. Macropores often provide channels for adsorbed molecules to quickly reach the surface of micropores, increasing the number of macrop...

Claims

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Application Information

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IPC IPC(8): C01B31/02
Inventor 陈培荣汪友明程备久马欢柯飞何利芳张春艳陈震
Owner ANHUI AGRICULTURAL UNIVERSITY
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