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Method for preparing bioelectrochemical system anode by using carbon nanotubes and carbon fibers

A technology of bioelectrochemistry and carbon nanotubes, which is applied in the field of bioelectrochemistry, can solve the problems of lower electron transfer efficiency due to internal resistance, inability to realize carbon fiber treatment, and insufficient number of microorganisms attached, so as to improve electron transfer efficiency and structural stability and conductivity, and the effect of improving the electrostatic adsorption function

Inactive Publication Date: 2019-08-23
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the low specific surface area of ​​carbon fibers leads to an insufficient amount of microbial attachment, and the large internal resistance severely reduces the electron transfer efficiency.
[0003] The current commonly used treatment method is chemical deposition (CVD). First, metal catalysts are deposited on the surface of carbon fibers by chemical methods, and then carbonized at high temperature under oxygen-free conditions by ethylene or acetylene gas, and carbon nanotubes are deposited on carbon fibers. Complicated, energy-intensive, and can only process small-area carbon fibers, and cannot process large-area carbon fibers

Method used

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  • Method for preparing bioelectrochemical system anode by using carbon nanotubes and carbon fibers

Examples

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Embodiment 1

[0026] A method for preparing a bioelectrochemical system anode by using carbon nanotubes and carbon paper, the steps are as follows:

[0027] (1) Immerse 100mg carbon nanotubes and 85mg, 2×2cm carbon paper in a mixture of 20mL concentrated nitric acid and concentrated sulfuric acid (1:3, V / V) for 2 hours, dilute the carbon nanotube acid solution to 100mL, and sand The core funnel was vacuum-filtered several times until the filtrate was neutral, dispersed into 100mL of deionized water, and subjected to ultrasonication for 1min to obtain a carboxylated carbon nanotube dispersion. After the carbon paper was mixed with acid, it was washed until neutral to obtain carboxylated carbon paper;

[0028] (2) Immerse the carboxyl carbon paper in step (1) in a positively charged 10 mg / mL polyethyleneimine aqueous solution for 10 minutes, wash off the unabsorbed part with deionized water, and assemble the upper band on the carboxy carbon paper after drying. Positively charged polyethylenei...

Embodiment 2

[0033] A method for preparing a bioelectrochemical system anode by using carbon nanotubes and carbon felts, the steps are as follows:

[0034] (1) Immerse 3mg carbon nanotubes and 3mg, 2×2cm carbon felt in a mixture of 20mL concentrated nitric acid and concentrated sulfuric acid (1:5, V / V) for 4 hours, dilute the carbon nanotube acid solution to 100mL, and sand The core funnel was vacuum-filtered several times until the filtrate was neutral, dispersed into 100mL of deionized water, and ultrasonicated for 1min to obtain a carboxylated carbon nanotube dispersion, and the carbon felt was treated with mixed acid and washed until neutral to obtain a carboxylated carbon felt;

[0035] (2) Immerse the carboxyl carbon felt in step (1) in a positively charged 16 mg / mL polyethyleneimine aqueous solution for 15 minutes, wash away unabsorbed parts with deionized water, and assemble the upper band on the carboxyl carbon felt after drying. Positively charged polyethyleneimine;

[0036] (3)...

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Abstract

The invention belongs to the field of bioelectrochemistry, and particularly relates to a method for preparing a bioelectrochemical system anode by using carbon nanotubes and carbon fibers. A carboxylcarbon nano tube and a carboxyl carbon fiber obtained at step (1) are negatively charged, so that an electrostatic adsorption function is improved; at the step (5), the structural stability and the conductive performance of the anode are improved by carbonizing the polyelectrolyte in the multi-layer structure at high temperature. The surface area of the electrode for attaching microorganisms is greatly increased, the internal resistance of the electrode is reduced, and the electron transfer efficiency is improved; reagents used in the preparation process can be recycled, so that energy conservation and environmental protection are realized. The method is simple and easy to implement and low in cost.

Description

technical field [0001] The invention belongs to the field of bioelectrochemistry, and in particular relates to a method for preparing an anode of a bioelectrochemical system by utilizing carbon nanotubes and carbon fibers. Background technique [0002] At present, the depletion of fossil fuels and environmental pollution are two important factors that pose a huge threat to the sustainable development of human beings. Bioelectrochemical systems can not only effectively solve environmental pollution, but also convert wastewater into electrical energy. unique system for each question. Carbon fibers are commonly used anode materials in bioelectrochemical systems. However, the low specific surface area of ​​carbon fibers leads to an insufficient number of microbial attachments, and the large internal resistance severely reduces the electron transfer efficiency. [0003] The current commonly used treatment method is chemical deposition (CVD). First, metal catalysts are deposited...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M4/96H01M8/16B82Y30/00
CPCB82Y30/00H01M4/8882H01M4/96H01M8/16Y02E60/50
Inventor 杨菁周彬杨亲正
Owner QILU UNIV OF TECH
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