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Porous graphite as well as preparation method and application thereof

A porous graphite and microporous membrane technology, applied in chemical instruments and methods, inorganic chemistry, electrical components, etc., can solve the problems of high cost and complex preparation process, and achieve the promotion of biofilm formation, simple preparation method, and increased ratio. The effect of surface area

Inactive Publication Date: 2018-03-06
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing MFC carbon-based anode materials such as graphene, carbon nanotubes, and porous carbon with uniform nanopore diameters are complicated to prepare, and the cost is relatively high

Method used

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  • Porous graphite as well as preparation method and application thereof
  • Porous graphite as well as preparation method and application thereof
  • Porous graphite as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Preparation of microbial fuel cell (MFC):

[0044] (1) The preparation method of porous graphite, such as figure 1 shown, including the following steps:

[0045] (1) Put 6g of ferrous gluconate powder into a porcelain ark, raise the temperature to 150°C at 5°C / min in a tube furnace atmosphere for 3 hours, then raise the temperature to 900°C at 2°C / min and hold for 2 hours to obtain carbide powder.

[0046] (2) Soak the carbide powder obtained in step (1) in 40 mL of hydrochloric acid (20%) for 2 hours, vacuum filter, and then rinse with deionized water until neutral.

[0047] (3) Step (2) was repeated several times, and the obtained powder was dried at 50° C. to obtain porous graphite.

[0048] (2) Preparation of MFC anode: Soak the carbon felt in 1% HCl and 1% NaOH solution for 1 h, then wash until neutral, dry for later use; weigh the prepared carbon felt in step (1) 27mg of porous graphite was dispersed in 1mL of deionized water, and then mixed with 1mL of binder ...

Embodiment 2

[0052] Preparation of microbial fuel cell (MFC):

[0053] (1) a preparation method of porous graphite, comprising the following steps:

[0054] (1) Dissolve 6g of ferrous gluconate powder in water and then dry it at 80°C, raise the temperature to 150°C at 5°C / min under argon atmosphere in a tube furnace and keep it for 3 hours, then raise the temperature to 900°C at 2°C / min and hold it for 2 hours, The carbide powder was obtained.

[0055](2) Soak the carbide powder obtained in step (1) in 40 mL of hydrochloric acid (20%) for 2 hours, and then rinse it with deionized water until neutral.

[0056] (3) Step (2) is repeated several times, and the obtained product is dried at 50° C. to obtain porous graphite.

[0057] (2) Preparation of MFC anode: Soak the carbon felt in 1% HCl and 1% NaOH solution for 1 h, then wash until neutral, dry for later use; weigh the prepared carbon felt in step (1) 27mg of porous graphite was dispersed in 1mL of deionized water, and then mixed with 1...

Embodiment 3

[0061] Preparation of microbial fuel cell (MFC):

[0062] (1) the preparation method of porous graphite, comprises the following steps:

[0063] (1) Put 6g of ferrous gluconate powder into a porcelain ark, raise the temperature to 1000°C at 2°C / min under an argon atmosphere in a tube furnace and hold it for 2h to obtain carbide powder.

[0064] (2) Soak the carbide powder obtained in step (1) in 40 mL of concentrated hydrochloric acid for 2 h, vacuum filter, and then rinse with deionized water until neutral.

[0065] (3) Step (2) was repeated once, and the obtained powder was dried at 100° C. to obtain porous graphite.

[0066] (2) Preparation of MFC anode: Soak the carbon felt in 1% HCl and 1% NaOH solution for 1 h, then wash until neutral, dry for later use; weigh the prepared carbon felt in step (1) 27mg of porous graphite was dispersed in 1mL of deionized water, and then mixed with 1mL of binder (10wt% polytetrafluoroethylene) on the pretreated carbon felt (3cm×3cm×0.5cm...

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Abstract

The invention discloses porous graphite as well as a preparation method and application thereof, and belongs to the field of microbial fuel cells. The method comprises the following steps: (1) calcining ferrous gluconate for 2-5h in an inert gas environment at 700-1,000 DEG C to obtain carbide powder; (2) soaking the carbide powder, obtained by the calcining in the step (1), in 20-38% hydrochloricacid by mass for 2-5h to remove iron-containing impurities, performing suction filtration with a microfiltration membrane in a vacuum state, and washing to neutrality with deionized water; (3) repeating the step (2) once to twice so as to ensure the iron-containing impurities are totally removed; drying at 50-120 DEG C to obtain porous graphite. The preparation method disclosed by the invention is simple; the obtained porous graphite has a large specific surface area and can provide a larger growth space for microorganisms and promote quick formation of a positive pole biomembrane of the microbial fuel cell; moreover, the porous graphite has relatively high conductivity and can remarkably increase the output power of the microbial fuel cell.

Description

technical field [0001] The invention belongs to the field of microbial fuel cells, and in particular relates to porous graphite and its preparation method and application. Background technique [0002] Microbial fuel cell (MFC) is an environmentally friendly technology that can convert organic waste into electrical energy through a series of electrochemical reactions. With the increasingly prominent problems of environmental pollution and global resource shortage, MFCs can use waste to generate electricity, which has attracted the attention of researchers. MFC has potential applications in many fields, such as bio-environment remediation, wastewater treatment, electric energy usage in special fields such as space and deep sea, biochemical oxygen demand sensor, toxicity sensor and life detector, etc. However, the low power output of MFC is an important factor restricting its development. [0003] The electron transfer of the anode in the MFC battery is an important step in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/205H01M4/86H01M4/88H01M4/96H01M8/16
CPCH01M4/8605H01M4/8828H01M4/96H01M8/16Y02E60/50
Inventor 李伟善熊娟李鑫胡美华邢丽丹廖友好
Owner SOUTH CHINA NORMAL UNIVERSITY
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