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Porous carbon with uniform nano aperture as well as preparation method thereof and application

A porous carbon and nanotechnology, applied in electrical components, battery electrodes, circuits, etc., can solve the problems of low specific surface area, can not promote anode biofilm well, achieve simple preparation method, suitable for microbial growth, promote biological The effect of film formation

Active Publication Date: 2014-07-02
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing MFC carbon-based anode materials are dominated by inhomogeneous microporous structures or nanoparticles. The former has a low specific surface area, and the latter is due to the non-porous surface structure for microbial growth, which cannot promote the anode biofilm well. Formation

Method used

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  • Porous carbon with uniform nano aperture as well as preparation method thereof and application
  • Porous carbon with uniform nano aperture as well as preparation method thereof and application
  • Porous carbon with uniform nano aperture as well as preparation method thereof and application

Examples

Experimental program
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Effect test

Embodiment 1

[0041] Preparation of biofuel cell (MFC):

[0042] (1) Preparation method of porous carbon with uniform nanopore size, such as figure 1 shown, including the following steps:

[0043] (1) Mix 10mL of ammonia water, 40mL of absolute ethanol and 11mL of deionized water under magnetic stirring at room temperature for 3 minutes to obtain a mixed solution, then add 10mL of tetraethyl orthosilicate (14-15% by volume) dropwise into the mixed solution, The dropping rate is 0.1mL / s, react for 24h after the dropwise addition, and then dry at 70°C for 5h to obtain nanosphere SiO 2 template;

[0044] (2) 1.5g of nanosphere SiO obtained in step (1) 2 The template was added to the sucrose acidic solution (containing 2.0g sucrose, 0.2mL concentrated sulfuric acid, 12mL deionized water), and then sintered at 120°C for 6h, and then sintered at 150°C for 6h, and finally the solid was ground and put into the porcelain ark. Calcined at 850°C for 2 hours under argon atmosphere in the furnace to...

Embodiment 2

[0050] Preparation of biofuel cell (MFC):

[0051] (1) A method for preparing porous carbon with uniform nanopore size, comprising the following steps:

[0052] (1) Mix 5mL of ammonia water, 20mL of absolute ethanol and 5.5mL of deionized water under magnetic stirring at room temperature for 3 minutes to obtain a mixed solution, then add 5.3mL of tetraethyl orthosilicate (volume fraction: 14-15%) dropwise into the mixed solution , the dropping rate was 0.05mL / s, after the dropwise addition was completed, reacted for 18h, and then dried at 70°C for 3h to obtain nanospheres of SiO 2 template;

[0053] (2) Add 0.8g of nanosphere SiO obtained in step (1) 2 The template was added to the sucrose acidic solution (containing 1.5g sucrose, 0.15mL concentrated sulfuric acid, 10mL deionized water), then sintered at 100°C for 8h, and then sintered at 120°C for 8h, and finally put the solid into the porcelain ark after grinding. Calcined at 900°C for 2 hours under argon atmosphere in th...

Embodiment 3

[0059] Preparation of biofuel cell (MFC):

[0060] (1) A method for preparing porous carbon with uniform nanopore size, comprising the following steps:

[0061] (1) Mix 20mL of ammonia water, 80mL of absolute ethanol and 22mL of deionized water under magnetic stirring for 3 minutes at room temperature to obtain a mixed solution, then add 20mL of tetraethyl orthosilicate (14-15% by volume) dropwise into the mixed solution, The dropping rate is 0.2mL / s, react for 24h after the dropwise addition, and then dry at 90°C for 3h to obtain nanosphere SiO 2 template;

[0062] (2) Add 2 g of the nanosphere SiO obtained in step (1) 2 The template was added to the sucrose acidic solution (containing 2.5g sucrose, 0.5mL concentrated sulfuric acid, 15mL deionized water), then sintered at 120°C for 8h, and then sintered at 150°C for 8h, and finally put the solid into the porcelain ark after grinding. Calcined at 800°C for 4 hours under argon atmosphere in the furnace to obtain powder;

[...

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Abstract

The invention discloses porous carbon with a uniform nano aperture as well as a preparation method thereof and application. The preparation method comprises the following steps of uniformly mixing ammonia water, ethanol and deionized water to obtain a mixed liquid, dropwise adding ethyl orthosilicate into the mixed liquid to be reacted and dried to obtain a nano spherical SiO2 template; adding the nano spherical SiO2 template into a sugarcane acid solution to be sintered for two times, grinding the solid, and calcining the solid in an inert gas environment for 2 hours to 4 hours; soaking the powder obtained in the calcining for 24 hours to 36 hours, washing the powder by utilizing deionized water to be neutral, and drying the powder to obtain the porous carbon with the uniform nano aperture. The preparation method is simple, the specific surface area of the porous carbon is large, the aperture is uniform, the porous carbon is applicable to the production of microorganisms, the rapid formation of a microorganism fuel cell anode biological membrane can be promoted, and the output power of a microorganism fuel cell can be greatly improved.

Description

technical field [0001] The invention belongs to the field of microbial fuel cells, and in particular relates to a porous carbon with a uniform nanometer pore size and a preparation method and application thereof. Background technique [0002] Microbial fuel cell (MFC) is a new environmental protection technology that applies biological resources to electrochemistry. With the increasing shortage of global resources and environmental pollution, the advantages of MFC are greatly reflected, that is, the use of waste to generate electricity. Wastewater treatment, bio-environmental remediation, and the use of electric energy in special fields such as deep sea and space are closely related to MFC. However, the extremely low output power of MFC has always been an important factor restricting its development. [0003] The electron transfer process of the MFC anode is an important step in energy conversion, which has an extremely important impact on the energy conversion efficiency ...

Claims

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Application Information

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IPC IPC(8): H01M4/90
CPCY02E60/50H01M4/88H01M4/9091H01M4/96
Inventor 李伟善崔丹陈晓芬黎常成
Owner SOUTH CHINA NORMAL UNIVERSITY
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