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A microbial fuel cell electrode with photocatalytic synergistic effect and its preparation method and application

A fuel cell electrode, synergistic effect technology, applied in biochemical fuel cells, battery electrodes, chemical instruments and methods, etc., can solve problems such as limited use range, reduce the limitations of use conditions, improve power production efficiency, and prolong life. Effect

Active Publication Date: 2018-04-20
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]Technical problem to be solved: In order to solve the problem that the existing microbial fuel cell has a limited range of utilization of organic matter in wastewater, the present invention provides a microorganism with photocatalytic synergistic effect Fuel cell electrode and its preparation method and application

Method used

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  • A microbial fuel cell electrode with photocatalytic synergistic effect and its preparation method and application
  • A microbial fuel cell electrode with photocatalytic synergistic effect and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Mix 0.25g tourmaline powder (8000 mesh), 0.06g iron powder (8000 mesh) and 0.06g epoxy resin powder, and spray the mixed powder onto a circular carbon cloth with a diameter of 5cm by electrostatic spraying.

[0022] (2) Place the sprayed carbon cloth in a resistance furnace at 200°C for 1 hour to obtain a carbon cloth loaded with mixed powder.

[0023] (3) Using isopropyl titanate as the titanium source, take 5 mL of isopropyl titanate and add it dropwise to 8 mL of absolute ethanol under the action of a magnetic stirrer to obtain solution A.

[0024] (4) Take 8 mL of absolute ethanol, add 1.5 mL of deionized water and 1.8 mL of glacial acetic acid one by one, then add bismuth nitrate and urea with a molar ratio of 0.01 to isopropyl titanate, and mix under the action of a magnetic stirrer Uniform solution B was obtained.

[0025] (5) Under the action of a magnetic stirrer, add solution B dropwise to solution A at a rate of 0.5 drops / s, continue stirring for 50 minu...

Embodiment 2

[0031] (1) Mix 0.25g tourmaline powder (8000 mesh), 0.06g iron powder (8000 mesh) and 0.06g epoxy resin powder, and spray the mixed powder onto a circular carbon cloth with a diameter of 5cm by electrostatic spraying.

[0032] (2) Place the sprayed carbon cloth in a resistance furnace at 200°C for 1 hour to obtain a carbon cloth loaded with mixed powder.

[0033] (3) Using titanium isopropoxide as the titanium source, take 5 mL of titanium isopropoxide and add it dropwise to 10 mL of absolute ethanol under the action of a magnetic stirrer to obtain solution A.

[0034](4) Take 10 mL of absolute ethanol, add 1.5 mL of deionized water and 1.8 mL of glacial acetic acid one by one, then add bismuth nitrate and urea with a molar ratio of 0.01 to titanium isopropoxide, and mix evenly under the action of a magnetic stirrer Solution B is obtained.

[0035] (5) Under the action of a magnetic stirrer, add solution B dropwise to solution A at a rate of 2 drops / s, continue stirring for 5...

Embodiment 3

[0041] (1) Mix 0.25g tourmaline powder (8000 mesh), 0.06g iron powder (8000 mesh) and 0.06g epoxy resin powder, and spray the mixed powder onto a circular carbon cloth with a diameter of 5cm by electrostatic spraying.

[0042] (2) Place the sprayed carbon cloth in a resistance furnace at 200°C for 1 hour to obtain a carbon cloth loaded with mixed powder.

[0043] (3) Arrange the carbon containing mixed powder in the magnetron sputtering chamber, and adjust the total pressure of the oxygen-argon mixture to 1pa, where O 2 The partial pressure accounts for 8% of the total air pressure. Immobilized pure TiO 2 The sputtering power of the target is 98kw / m 2 , fixed non-metallic doped TiO 2 The sputtering power of the target is 6.2kw / m 2 , fixed metal-doped TiO 2 The sputtering power of the target is 7.3kw / m 2 , deposited at room temperature for 25min to obtain co-doped TiO 2 .

[0044] (4) After the carbon cloth in (3) was annealed for 2 h at an annealing temperature of 490 ...

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Abstract

The invention discloses a microbial fuel cell electrode having a photocatalytic synergistic effect as well as a preparation method and an application of the electrode. The electrode comprises a carbon cloth supporting body, a tourmaline and reducing substance mixed powder layer and a modified photocatalytic material, wherein the tourmaline and reducing substance mixed powder layer are attached to the outer surface of the carbon cloth supporting body, and the modified photocatalytic material is attached to the surface of the tourmaline and reducing substance mixed powder layer. Microbes and a photocatalyst in the electrode have a coupling effect during degradation of wastewater; the modified photocatalyst has the visible-light response, and limitations on usage conditions of the photocatalyst are greatly reduced; tourmaline has pyroelectricity and piezoelectricity and can produce permanent weak current, the service life of hole-electron pairs produced on the surface of the photocatalytic material is prolonged under the effect of the current, and the photocatalytic efficiency is improved. Besides, tourmaline and reducing substance mixed powder can effectively ease transfer of holes-electrons or oxidized ions produced by photocatalysis to a biological membrane, and the activity of the microbes is guaranteed.

Description

technical field [0001] The invention relates to the field of microbial fuel cell technology and photocatalysis technology, in particular to a microbial fuel cell electrode with photocatalytic synergistic effect and its preparation method and application. Background technique [0002] At present, environmental problems and energy problems seriously affect people's life and economic development. Environmental problems are becoming more and more serious, and energy shortage has become an urgent problem to be solved. Microbial fuel cell (MFC), as a technology for wastewater treatment and electricity generation, has been favored by many researchers. MFC reaction conditions are mild, no other energy is needed during the reaction process, and no pollutants are generated. It is a water treatment technology with sustainable development significance. [0003] Microbial fuel cells use microorganisms to transfer electrons from organic matter to the anode under oxygen-deficient conditio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/86H01M4/88H01M4/90H01M8/16C02F3/34
CPCC02F3/34C02F2201/009H01M4/86H01M4/8663H01M4/88H01M4/9083H01M8/16Y02E60/50Y02P70/50Y02W10/37
Inventor 陈英文李林沈树宝
Owner NANJING TECH UNIV
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