Method for improving electricity generation and sensing performance of microbial fuel cell

A fuel cell and microorganism technology, applied in the field of microbial electrochemistry and biosensing, can solve the problems of poor sensing performance of microbial fuel cell sensor, increase the sensing application range of MFC sensor, narrow working temperature range, etc. The effect of application temperature range, improved electrochemical performance, and improved sensing sensitivity

Active Publication Date: 2019-06-28
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
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  • Claims
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Problems solved by technology

[0006] Aiming at the above deficiencies or improvement needs of the prior art, the present invention provides a method for improving the power generation and sensing performance of microbial fuel cells, by acclimating the anode biofilm of microbial fuel cell sensors under low temperature conditions, the experiment found that The anode biofilms acclimatized in this specific temperature range not only have improved power generation capacity and sensing performance for toxic heavy metals in low temperature environment, but also the power generation capacity and sensing performance of the sensor after low temperature acclimatization can be improved under normal temperature working environment. Also greatly improved, low temperature acclimatization increases the sensing application range of MFC sensors, thereby solving the technical problems of poor sensing performance and narrow operating temperature range of microbial fuel cell sensors in the prior art

Method used

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  • Method for improving electricity generation and sensing performance of microbial fuel cell

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Experimental program
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Embodiment 1

[0044] (1) Preparation of graphite plate anode for microbial fuel cell: Cut the graphite plate into small squares of 2cm × 2cm × 0.5cm, and after polishing with 800-mesh and 1200-mesh sandpaper, add an appropriate amount of 0.05 μm polished aluminum powder and graphite to the polishing table. The electrode is polished by the figure-of-eight method, and after being washed with deionized water, a clean graphite plate electrode is obtained. Immerse the clean graphite plate in acetone, absolute ethanol, and deionized water in sequence, ultrasonically clean each for 15 minutes, and dry in an oven at 70°C for 4 hours to obtain the graphite plate anode of the microbial fuel cell.

[0045] (2) Preparation of air cathode for microbial fuel cell: Cut 50-mesh stainless steel mesh into a circle with a diameter of 3.8 cm, immerse in acetone, absolute ethanol, and deionized water in sequence, ultrasonically clean each for 15 min, and dry in an oven at 70°C for 4 h for later use. Weigh 5g of...

Embodiment 2

[0050] (1) Preparation of graphite plate anode for microbial fuel cell: Cut the graphite plate into small squares of 2cm × 2cm × 0.5cm, and after polishing with 800-mesh and 1200-mesh sandpaper, add an appropriate amount of 0.05 μm polished aluminum powder and graphite to the polishing table. The electrode is polished by the figure-of-eight method, and after being washed with deionized water, a clean graphite plate electrode is obtained.

[0051] Immerse the clean graphite plate in acetone, absolute ethanol, and deionized water in sequence, ultrasonically clean each for 15 minutes, and dry in an oven at 70°C for 4 hours to obtain the graphite plate anode of the microbial fuel cell.

[0052] (2) Preparation of air cathode for microbial fuel cell: Cut 50-mesh stainless steel mesh into a circle with a diameter of 3.8 cm, immerse in acetone, absolute ethanol, and deionized water in sequence, ultrasonically clean each for 15 min, and dry in an oven at 70°C for 4 h for later use. We...

Embodiment 3

[0057] (1) Preparation of graphite plate anode for microbial fuel cell: Cut the graphite plate into small squares of 2cm × 2cm × 0.5cm, and after polishing with 800-mesh and 1200-mesh sandpaper, add an appropriate amount of 0.05 μm polished aluminum powder and graphite to the polishing table. The electrode is polished by the figure-of-eight method, and after being washed with deionized water, a clean graphite plate electrode is obtained.

[0058] Immerse the clean graphite plate in acetone, absolute ethanol, and deionized water in sequence, ultrasonically clean each for 15 minutes, and dry in an oven at 70°C for 4 hours to obtain the graphite plate anode of the microbial fuel cell.

[0059] (2) Preparation of air cathode for microbial fuel cell: Cut 50-mesh stainless steel mesh into a circle with a diameter of 3.8 cm, immerse in acetone, absolute ethanol, and deionized water in sequence, ultrasonically clean each for 15 min, and dry in an oven at 70°C for 4 h for later use. We...

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Abstract

The invention belongs to the field of microbial electrochemistry and biosensing, and more particularly to a method for improving the electricity generation and sensing performance of a microbial fuelcell. In a low-temperature environment, the anode biological film of the microbial fuel cell is domesticated, and the microbial fuel cell sensor with successful low-temperature domestication can be obtained after the microbial fuel cell output voltage is stable. The anode of the microbial fuel cell sensor having the specific structure obtained by low-temperature domestication generate an electro-bacteria community, and enhances the power generation capacity and the sensing performance of the microbial fuel cell sensor. The method for regulating the biome structure of the microbial fuel cell bythe low-temperature domestication has the electricity production performance increased by 12.5%-75% and the sensing sensitivity increased by about 2-3 times compared with a fuel cell activated at room temperature.

Description

technical field [0001] The invention belongs to the field of microbial electrochemistry and biological sensing, and more specifically relates to a method for improving the power generation and sensing performance of microbial fuel cells. Background technique [0002] my country's water environment pollution problem is serious. Various heavy metals and organic poisons are discharged into the natural environment through industrial wastewater and other channels, causing serious damage to water bodies. Therefore, there is an urgent need for a sensor that can continuously monitor water quality online, as a front-end warning method for sewage, and provide protection for the water environment. [0003] A microbial fuel cell is a device that uses electroactive microorganisms as a catalyst to degrade organic matter in sewage and convert it into electrical energy. Today, applied research on microbial fuel cells has involved many fields such as sludge treatment, wastewater power gener...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/04664H01M8/16C02F3/00C02F3/34G01N27/403
CPCY02E60/50Y02P70/50
Inventor 刘冰川黎建峰潘静怡郭胜霞汪东亮杨昌柱濮文虹胡敬平侯慧杰杨家宽梁莎肖可可
Owner HUAZHONG UNIV OF SCI & TECH
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