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Microbial fuel cell with photocatalytic material loaded on positive electrode and preparation method and application of microbial fuel cell

A photocatalytic material, anode-loaded technology, applied in biochemical fuel cells, chemical instruments and methods, electrochemical biocombination treatment, etc., can solve the problem of incomplete mineralization of photocatalytic technology Low electricity and other problems, to achieve the effects of improved photocatalytic efficiency, improved degradation efficiency and mineralization degree, and increased power density

Pending Publication Date: 2019-01-08
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention solves the technical problems in the prior art that microbial fuel cells have poor tolerance to chlorophenol pollutants, low electricity production, incomplete mineralization of photocatalytic technology, and high electron-hole recombination rate

Method used

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  • Microbial fuel cell with photocatalytic material loaded on positive electrode and preparation method and application of microbial fuel cell
  • Microbial fuel cell with photocatalytic material loaded on positive electrode and preparation method and application of microbial fuel cell

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Embodiment 1

[0028] The preparation method of the microbial fuel cell of the anode load photocatalytic material of the present invention comprises the following steps:

[0029] (1) Mesoporous graphitic carbon nitride (mpg-C 3 N 4 ) photocatalytic material preparation: 10g NH 4 SCN was dissolved in 10 mL of deionized water, and then 10 g of 40% silica sol (SiO 2 nanoparticles) by adding NH 4 In SCN solution, the SiO 2 Nanoparticles and NH 4 The mass ratio of SCN is (0.1~2); it is stirred and heated at 100°C until the water is evaporated to dryness and becomes a white solid. The white solid was taken out and put into a crucible, and fired at a high temperature of 550°C in a muffle furnace for 2h at a heating rate of 5°C / min. After it was cooled, it was taken out to obtain a yellow solid powder. Then add the yellow solid powder into 100mL ammonium bifluoride solution (4mol / L), mix and stir in the fume hood for 24h to remove SiO 2 Nano-particles, finally filtered and washed with deioni...

Embodiment 2

[0034] The preparation method of the microbial fuel cell of the anode load photocatalytic material of the present invention comprises the following steps:

[0035] (1) TiO 2 Photocatalytic anode preparation: weigh 300mg TiO 2 Photocatalytic material, mix it with polyvinylidene fluoride in a beaker, stir and ultrasonically disperse it evenly, then evenly load it on the surface of a 4×2×1cm carbon cloth electrode, heat it at 70°C for 20h, and dry it TiO can be obtained 2 Photocatalytic composite photocatalytic anode.

[0036] (2) Preparation of air cathode: After shaking and mixing 300 mg of activated carbon powder, 30 mg of carbon black powder and 1 mL of 10% polyvinylidene fluoride solution, evenly load it on the surface of a 50-mesh stainless steel mesh with a diameter of 4.8 cm, and immerse it in deionized water for 15 min Finally, take it out and dry it naturally in the air for 8 hours to make an air cathode.

[0037] (3) Photocatalytic microbial fuel cell (MFC) reactor...

Embodiment 3

[0039] The preparation method of the microbial fuel cell of the anode load photocatalytic material of the present invention comprises the following steps:

[0040] (1) Preparation of ZnO photocatalytic anode: Weigh 300mg of ZnO photocatalytic material, mix it with polytetrafluoroethylene in a beaker, stir and ultrasonically disperse it evenly, and then evenly load it on a 4×2×1cm graphite plate electrode surface, heated at 80°C for 18 hours, and dried to prepare a ZnO composite photocatalytic anode.

[0041] (2) Preparation of air cathode: After shaking and mixing 300 mg of activated carbon powder, 30 mg of carbon black powder and 1 mL of 10% polyvinylidene fluoride solution, evenly load it on the surface of a 50-mesh stainless steel mesh with a diameter of 4.8 cm, and immerse it in deionized water for 15 min Finally, take it out and dry it naturally in the air for 8 hours to make an air cathode.

[0042] (3) Photocatalytic microbial fuel cell (MFC) reactor: the ZnO composite...

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Abstract

The invention discloses a microbial fuel cell with a photocatalytic material loaded on a positive electrode and a preparation method and application of the microbial fuel cell, and belongs to the technical field of environment water pollution treatment and energy recovery. The photocatalytic material is loaded on the positive electrode of the microbial fuel cell, a negative electrode is an air electrode; and a resistor is connected between the positive electrode and the negative electrode. The preparation method comprises the following steps: dissolving the photocatalytic material, coating onthe surface of a carbon electrode, heating to obtain the carbon electrode loaded with the photocatalytic material, taking the carbon electrode as the positive electrode and the air electrode as the negative electrode, connecting the resistor between the positive electrode and the negative electrode; connecting the positive electrode, the negative electrode and the resistor in series, putting in areactor, and forming the microbial fuel cell with the photocatalytic material loaded on the positive electrode. The microbial fuel cell with the photocatalytic material loaded on the positive electrode can rapidly thoroughly degrade the organic matters like chlorophenols, and the electricity generation performance of the fuel cell is improved.

Description

technical field [0001] The invention belongs to the technical field of environmental water pollution treatment and energy recovery, and more specifically relates to a microbial fuel cell with an anode loaded with a photocatalytic material and a preparation method and application thereof. Background technique [0002] Microbial fuel cells (MFCs) use microorganisms in nature as catalysts to generate electricity while degrading various organic pollutants through the metabolic process of microorganisms. It is a new type of wastewater treatment and clean energy technology. However, anode microorganisms in microbial fuel cells prefer to use easily degradable small molecules as electron donors, and have limited ability to treat toxic and refractory organic pollutants. [0003] Because photocatalytic technology can use light energy to generate hydroxyl radicals and superoxide negative ions with strong oxidative properties, it can achieve catalytic oxidation and degradation of most o...

Claims

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Application Information

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IPC IPC(8): C02F3/00H01M4/86H01M4/88H01M8/16C02F101/36
CPCC02F3/005C02F2101/36H01M4/8652H01M4/8828H01M8/16Y02E60/50
Inventor 侯慧杰王晓璇陈沁赵文金胡敬平刘冰川杨家宽
Owner HUAZHONG UNIV OF SCI & TECH
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