Preparation and application of graphene/substrate electrode and polyaniline-graphene/substrate electrode

A base electrode and graphene technology, applied in the field of electrodes, to achieve the effects of facilitating the formation of biofilms, improving power output, and huge attachment area

Inactive Publication Date: 2012-10-31
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the use of electrochemical reduction method to prepare graphene and combine polyaniline modified electrodes for microbial fuel cells has not been reported.

Method used

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  • Preparation and application of graphene/substrate electrode and polyaniline-graphene/substrate electrode
  • Preparation and application of graphene/substrate electrode and polyaniline-graphene/substrate electrode
  • Preparation and application of graphene/substrate electrode and polyaniline-graphene/substrate electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] This example is used to illustrate the process of obtaining graphene / substrate electrode by electrochemical reduction method from graphene oxide / substrate electrode.

[0045] Utilize the method for preparing graphene / substrate electrode by electrochemical reduction method, it is characterized in that, comprises the following steps:

[0046] (1) The graphene oxide aqueous solution is ultrasonically obtained to obtain a uniform and stable dispersed graphene oxide aqueous solution;

[0047] (2) Evenly drop-coat the above-mentioned graphene aqueous solution onto the base electrode, and dry naturally to obtain graphene oxide / base electrode;

[0048] (3) Using a three-electrode system, the graphene / substrate electrode was reduced by cyclic voltammetry to obtain a graphene / substrate electrode; it was dried naturally.

[0049] A carbon cloth with a size of 1.8 cm×1.8 cm is used as a base electrode, and the amount of graphene oxide attached to the base electrode is 2 mg for exa...

Embodiment 2

[0051] The preparation method of polyaniline-graphene / substrate electrode, comprises the following steps:

[0052] (1) Dissolve 0.3g of aniline in 10mL of 1mol / L hydrochloric acid, quickly add it to the prepared solution of 10mL of 1mol / L hydrochloric acid containing 0.18g of ammonium persulfate, stir overnight, and obtain the polyaniline solution;

[0053] (2) Filter the solution in the above step (1), wash with deionized water until the filtrate is neutral; dry in a vacuum oven at 60°C to obtain polyaniline powder;

[0054] (3) Dissolve the dried polyaniline solution in water, and ultrasonically obtain a stable dispersed polyaniline aqueous solution; the concentration is preferably 1 mg / mL;

[0055] (4) Soak the graphene / substrate electrode prepared in Example 1 in a uniformly dispersed polyaniline aqueous solution, take it out and dry it naturally to obtain a graphene-polyaniline / substrate electrode.

Embodiment 3

[0057] This example is used to illustrate the assembly of microbial fuel cells using the electrodes prepared in Example 1 and Example 2.

[0058] The microbial fuel cell adopts a double-chamber structure, which is composed of two circular plexiglass, and the volume of the anode and cathode chambers is 40mL. The cathode and anode chambers are separated by a nafion117 proton exchange membrane with a size of 2cm×2cm. Anolyte consists of 1g / L CH 3 COONa,0.3g / L NH 4 Cl, 1g / L Nacl, 0.03g / LMgSO 4 ,0.04g / L CaCl 2 ,0.2g / L NaHCO 3 ,5.3g / L K 2 HPO 4 ,10.7g / L KH 2 PO 4 The catholyte consists of 32.9g / L potassium ferricyanide and pH=6.9 buffer solution (5.3g / L K 2 HPO 4 ,10.7g / L KH 2 PO 4 ) is configured, and a carbon felt with a thickness of 3mm and a size of 2cm×2cm is used as the cathode. The MFC is placed in a constant temperature bath at 35°C and operated under the condition of an external 500Ω external resistance. When the output voltage is less than 50mV, the anolyte an...

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Abstract

The invention discloses preparation and application of a graphene / substrate electrode and a polyaniline-graphene / substrate electrode and belongs to the technical field of electrodes. The preparation comprises the following steps of: dispensing a graphene oxide aqueous solution on a substrate; reducing a graphene oxide / substrate electrode by employing a three-electrode system and cyclic voltammetry to obtain the graphene / substrate electrode; soaking the graphene / substrate electrode in a polyaniline aqueous solution; and taking out and drying to obtain the polyaniline-graphene / substrate electrode. The method is simple in process, convenient, rapid, green and free from pollution, and the power output of a microbial fuel cell can be obviously improved.

Description

technical field [0001] The invention belongs to the technical field of electrodes, and specifically relates to the preparation method of graphene / substrate electrode, polyaniline-graphene / substrate electrode and their application in microbial fuel cells, providing a new and effective idea for surface modification of electrodes . Background technique [0002] Human beings are facing enormous energy and environmental pressure. Energy is an important material basis for human social and economic development and a source of power for the development of productive forces. Our greatest environmental challenge is addressing both energy production and CO 2 release, we must develop a new platform to reduce CO while ensuring sufficient energy output 2 release. Therefore, the best way to solve energy and climate is to apply a large amount of investment to the research and development of renewable energy. [0003] Microbial fuel cell (MFC for short) is a new technology for generating...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88
CPCY02E60/50
Inventor 刘中良侯俊先
Owner BEIJING UNIV OF TECH
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