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Biomass-based activated carbon-coated iron carbide three-dimensional porous microbial fuel cell anode material, anode and preparation method thereof

A technology based on activated carbon and anode materials, applied in biochemical fuel cells, battery electrodes, circuits, etc., can solve the problems of accelerating electron transfer at the extracellular interface, high modification cost, unfavorable microbial attachment and growth, etc., to improve the interface electron transfer rate , high affinity, and the effect of reducing the anode electron transfer resistance

Active Publication Date: 2021-03-26
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art, and to provide a three-dimensional porous microbial fuel cell anode material and anode of iron carbide coated with biomass-based activated carbon, and the preparation method of the two, so as to solve the problems existing in the existing modified three-dimensional carbon-based electrodes. It is not conducive to the growth of microorganisms and the high cost of modification. While reducing the cost of microbial fuel anodes, it can promote the growth of anode biofilms and accelerate the electron transfer at the extracellular interface.

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  • Biomass-based activated carbon-coated iron carbide three-dimensional porous microbial fuel cell anode material, anode and preparation method thereof
  • Biomass-based activated carbon-coated iron carbide three-dimensional porous microbial fuel cell anode material, anode and preparation method thereof
  • Biomass-based activated carbon-coated iron carbide three-dimensional porous microbial fuel cell anode material, anode and preparation method thereof

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Embodiment 1

[0043] In this embodiment, the preparation method of the iron carbide three-dimensional porous microbial fuel cell anode material and the anode provided by the biomass-based activated carbon coating is as follows:

[0044] (1) Dry the distiller's grains as the biomass raw material, then carbonize at 450°C for 1.5h, cool to room temperature to obtain carbonized material, and add 2mL of K to every 1g of carbonized 2 CO 3 The ratio of the solution is to add K with a concentration of 1mol / L 2 CO 3 solution, and then add ferric chloride solution to make the mass ratio of iron to carbide 10%, and ultrasonically mix in a water bath for 30 minutes under the condition of 40kHz, so that iron ions are fully absorbed into the pore structure of the carbide, and then dried at 100°C. A mixture of carbonized materials is obtained.

[0045] (2) Place the carbonized material mixture obtained in step (1) in a crucible that can circulate gas, and 2 Treat at a constant temperature of 850°C for...

Embodiment 2

[0048] In this embodiment, the preparation method of the iron carbide three-dimensional porous microbial fuel cell anode material and the anode provided by the biomass-based activated carbon coating is as follows:

[0049] (1) Dry the distiller's grains as the biomass raw material, then carbonize at 550°C for 2 hours, cool to room temperature to obtain carbonized material, add KOH solution with a concentration of 3mol / L according to the ratio of 3mL KOH solution per 1g of carbonized material, and then add nitric acid The iron solution has a mass ratio of iron to carbide of 2%, and is ultrasonically mixed in a water bath at 40 kHz for 30 minutes to fully absorb iron ions into the pore structure of the carbide, and then dry at 100°C to obtain a mixture of carbides.

[0050] (2) Place the carbonized material mixture obtained in step (1) in a crucible that can circulate gas, and 2 Treat at a constant temperature of 700°C for 1 hour in the atmosphere. During the constant temperatur...

Embodiment 3

[0054] In this embodiment, the preparation method of the iron carbide three-dimensional porous microbial fuel cell anode material and the anode provided by the biomass-based activated carbon coating is as follows:

[0055] (1) Dry the distiller's grains as the biomass raw material, then carbonize at 500°C for 1 hour, cool to room temperature to obtain carbonized material, add KOH solution with a concentration of 2mol / L according to the ratio of 5mL KOH solution per 1g of carbonized material, and then add nitric acid The mass ratio of iron to carbide is 5% in the iron solution, ultrasonically mixed in a water bath at 40 kHz for 30 minutes, so that iron ions are fully absorbed into the pore structure of the carbide, and then dried at 100°C to obtain a mixture of carbides.

[0056] (2) Place the carbonized material mixture obtained in step (1) in a crucible that can circulate gas, and 2 Treat at a constant temperature of 800°C for 1 hour in the atmosphere. During the constant tem...

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Abstract

The invention provides a biomass-based activated carbon coated iron carbide three-dimensional porous microbial fuel cell anode material, which is composed of biomass-based activated carbon and iron carbide, wherein iron carbide is distributed in the biomass-based activated carbon and is coated by the biomass-based activated carbon to form micron-sized activated carbon-coated iron carbide particles, and the anode material has a three-dimensional porous network structure consisting of micron and nano composite holes. The invention also provides a microbial fuel cell anode based on the anode material, and preparation methods of the anode material and the anode. According to the invention, the problems of unfavorable attached growth of microorganisms and high modification cost of the existingmodified three-dimensional carbon-based electrode are solved, and the attached growth of an anode biological membrane can be promoted and the electron transfer of an extracellular interface can be accelerated while the cost of the microbial fuel anode is reduced.

Description

technical field [0001] The invention belongs to the technical field of microbial fuel cells, and relates to a three-dimensional porous microbial fuel cell anode material of iron carbide coated with biomass-based activated carbon, an anode and a preparation method thereof. Background technique [0002] Microbial Fuel Cell (MFC) is a new type of simultaneous wastewater treatment and energy recovery technology that uses microorganisms to convert the chemical energy contained in wastewater into electrical energy. It is a sustainable green energy technology with broad application prospects. However, the low power generation efficiency and high production cost of MFC limit its large-scale application. In MFCs, electrogenic microorganisms generate electrons by metabolically degrading organic substrates, and electrons are transferred from the cell surface of microorganisms to the anode surface. Due to the slow transfer of extracellular electrons between electrogenic microorganisms a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/86H01M4/96H01M4/88H01M8/16
CPCH01M4/8605H01M4/8657H01M4/88H01M4/8828H01M4/96H01M8/16H01M2004/8689Y02E60/50
Inventor 谢汝桢王晖杨平
Owner SICHUAN UNIV
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