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A kind of preparation method of graphitized hierarchical porous carbon

A porous carbon and graphitization technology, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems of harsh process conditions, inability to obtain mesopores, complex process, etc. The ability to adsorb and remove organic pollutants, the effect of high degree of graphitization

Active Publication Date: 2022-07-26
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Purpose of the invention: The present invention provides a preparation of graphitized hierarchical porous carbon for the problems of complex process, harsh process conditions and inability to obtain mesopores in the existing technology for increasing the specific surface area and porosity of hydrothermal carbon method, the porous carbon material obtained by this preparation method not only has a graphitized structure, but also has a large number of mesopores while having a large number of micropores

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  • A kind of preparation method of graphitized hierarchical porous carbon
  • A kind of preparation method of graphitized hierarchical porous carbon
  • A kind of preparation method of graphitized hierarchical porous carbon

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Embodiment 1

[0031] The preparation method of the graphitized hierarchical porous carbon of the present invention specifically comprises the following steps:

[0032] (1) Preparation of hydrothermal charcoal: first, the cotton stalks were washed with deionized water to remove surface impurities, then the cleaned cotton stalks were dried in an oven at 105 °C for 12 hours, and pulverized with a pulverizer and passed through a 30-mesh sieve to obtain Cotton straw powder; the hydrothermal carbonization experiment was carried out in a high temperature and high pressure reactor. About 10g of cotton straw powder and 60mL of deionized water were put into a quartz tube, and the quartz tube containing the reaction materials was placed in the main reactor. Before the main reactor was finally sealed, the reactor was purged with argon (purity 99.999%) to provide an oxygen-free environment; under autogenous pressure of 1.5-5MPa, the reactor was heated to 200°C at a heating rate of 10°C / min, And the cons...

Embodiment 2

[0038] The preparation method of the graphitized hierarchical porous carbon of the present invention specifically comprises the following steps:

[0039](1) Preparation of hydrothermal charcoal: first, the cotton stalks were washed with deionized water to remove surface impurities, then the cleaned cotton stalks were dried in an oven at 105 °C for 12 hours, and pulverized with a pulverizer and passed through a 30-mesh sieve to obtain Cotton straw powder; The hydrothermal carbonization experiment was carried out in a high temperature and high pressure reactor. About 10g cotton straw powder and 70mL deionized water were put into a quartz tube, and the quartz tube containing the reaction material was placed in the main reactor. Before the main reactor was finally sealed, the reactor was purged with argon (purity 99.999%) to provide an oxygen-free environment; under autogenous pressure of 1.5-5MPa, the reactor was heated to 220°C at a heating rate of 10°C / min, And the constant tem...

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Abstract

The invention discloses a preparation method of graphitized hierarchical porous carbon. The preparation method is as follows: after biomass raw material is hydrothermally carbonized, hydrothermal carbon is obtained, and the hydrothermal carbon is prepared by using composite activators potassium citrate and iron citrate. Activation, and acid washing after activation to obtain graphitized hierarchical porous carbon. The product prepared by the preparation method of the present invention has a high degree of graphitization and has a hierarchical pore (micro-media) structure, and the existence of mesopores is conducive to the fast and efficient adsorption and removal of organic pollutants, so the preparation method of the present invention not only increases the The specific surface area and porosity of the material are increased, thereby increasing its adsorption capacity, and the graphitized structure can improve the π-π interaction between biochar and organic pollutants, further increasing its ability to adsorb and remove organic pollutants. Finally, The preparation method of the invention is simple in process, does not need to use complex synthesis equipment and corrosive reagents, and the prepared product has good adsorption performance for organic dyes in water.

Description

technical field [0001] The invention relates to a preparation method of graphitized hierarchical porous carbon. Background technique [0002] Biomass refers to the organic matter generated by photosynthesis, mainly including straw, fruit peel, sawdust, rice husk, branches, weeds and other agricultural and forestry wastes, livestock and poultry manure, sludge and domestic waste. The random burning of biomass will produce a large amount of particulate matter and harmful gases, increase smog, seriously affect the atmospheric environment, reduce air quality, and thus pose a threat to human health. Biomass is mainly composed of C, H, O, N, P, S and other elements, with low ash content, which is called green coal. The production and development and utilization of biomass in my country have great potential. Converting biomass into high-quality and high-performance biomass charcoal can not only realize the high-value utilization of biomass waste, but also drive agriculture, forestr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/205
CPCC01B32/205
Inventor 吉远辉程龙
Owner SOUTHEAST UNIV
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