Microorganism-assisted CO2 photoelectrocatalysis reduction method

A photoelectric catalysis and microbial technology, applied in chemical instruments and methods, biological water/sewage treatment, electrochemical and biological combination treatment, etc., can solve the problems of high energy consumption in hydrogen evolution reaction competition, poor carbon fixation performance of the reaction system, poor product selectivity, etc. problem, to achieve the effect of wide response range of visible light, inhibition of competitive hydrogen evolution reaction, and good conductivity

Inactive Publication Date: 2017-11-07
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] On the basis of the prior art, the present invention provides a microbial-assisted photoelectric catalytic reduction of CO 2 approach to overcome existing CO 2 In the reduction method, the catalyst has low activity, poor selectivity to products, poor carbon fixation performance of the reaction system, hydrogen evolution reaction competition in the reduction process, and high energy consumption required for the reaction. High efficiency and high selectivity reduction of CO under the condition of low electricity consumption 2 Converting to low-carbon energy can also treat organic wastewater, which has dual meanings for solving energy and environmental problems

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  • Microorganism-assisted CO2 photoelectrocatalysis reduction method

Examples

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Embodiment 1

[0027] Use a carbon cloth with a size of 5 cm×2 cm as the anode substrate. First rinse with plenty of water, and then sonicate it in four solutions of acetone, deionized water, ethanol, and deionized water for 20 minutes, and then in 1 mol / L Soak in HCl and 1 mol / L NaOH for 2 hours respectively to remove impurities on the surface of the electrode material, then rinse with a large amount of deionized water, soak in deionized water for 5 hours, change the water, and repeat three times. Select 25 mL of aerobic activated sludge as the bacteria source to inoculate the anode compartment of the microbial fuel cell, add 100 mL of brewery wastewater as the culture solution, and prepare the N-doped graphene quantum dots (NGQD) / MOFs composite as the cathode , With 1 mol / LNaHCO containing 25% volume fraction of 1-butyl-3-methylimidazole tetrafluoroborate ionic liquid 3 Aqueous solution as binary catholyte, CO 2 It is the cathode electron acceptor, with an external 3000 Ω resistor, and the m...

Embodiment 2

[0029] Use a carbon felt with a size of 4cm×2cm as the anode substrate. First rinse with a lot of water, and then sonicate for 20 minutes in four solutions of acetone, deionized water, ethanol, and deionized water, and then in 1 mol / L HCl and Soak in 1 mol / L NaOH for 2 hours to remove impurities on the surface of the electrode material, then rinse with a large amount of deionized water, soak in deionized water for 5 hours, change the water, and repeat three times. Select 20 mL of digested sludge as the bacteria source to inoculate the anode compartment of the microbial fuel cell, and add 80 mL of domestic sewage as the culture solution to prepare the graphene / g-C 3 N 4 / MOFs composite material as the cathode, prepared with 1 mol / L NaHCO containing 35% volume fraction of 1-butyl-3-methylimidazole hexafluorophosphate ionic liquid and 25% volume fraction of acetonitrile 3 Aqueous solution as ternary catholyte, CO 2 It is the cathode electron acceptor, with an external 2000 Ω resisto...

Embodiment 3

[0031] Use a graphite rod with a diameter of 1 cm and a length of 15 cm as the anode substrate. First rinse with a large amount of water, and then sonicate it in four solutions of acetone, deionized water, ethanol, and deionized water for 20 minutes, and then at 1 mol / Soaked in L HCl and 1 mol / L NaOH for 2 h respectively to remove the surface impurities of the electrode material, then rinsed with a large amount of deionized water, soaked in deionized water for 5 h, changed the water, and repeated three times. Select 15 mL of anaerobic activated sludge as the bacteria source to inoculate the anode compartment of the microbial fuel cell, and add 80 mL of domestic sewage as the culture solution to prepare the graphene / g-C 3 N 4 / MOFs composite material is the cathode, which has been prepared containing 30% volume fraction of 1-butyl-3-methylimidazole hexafluorophosphate ionic liquid and 25% volume fraction of 1 mol / L KHCO of chloroform 3 Aqueous solution as ternary catholyte, CO 2 ...

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Abstract

The invention discloses a microorganism-assisted CO2 photoelectrocatalysis reduction method. According to the method, the method is conducted in a double-chamber quartz electrolytic bath with a cation membrane as a partition membrane; microorganisms obtained through an on-line training method and with electrical activity serve as an anode; a multi-element electrolyte containing ionic liquid serves as a cathode electrolyte; a MOFs-based composite photoelectrocatalysis material serves as a cathode; the temperature is controlled to be the room temperature; CO2 gas is led at a certain flow speed for half an hour; certain bias voltage is exerted; and under simulated sunlight irradiation, CO2 is subjected to photoelectrocatalysis reduction through the cathode to be converted into low-carbon energy while the anode treats organic waste water. The method is environmentally friendly, easy to operate and low in energy consumption, under the effect the sunlight and an electric field, CO2 efficient continuous reduction is achieved, meanwhile, the anode can also treat the organic waste water, and two functions are achieved only through one method.

Description

Technical field [0001] The invention relates to a photoelectric catalytic reduction of CO 2 The method is specifically a multi-element electrolyte system containing ionic liquids, using the self-driving ability of the microbial anode, using the MOFs-based composite photoelectric catalytic material as the cathode, and photoelectrically reducing CO under visible light irradiation. 2 Methods to convert into low-carbon energy. Background technique [0002] The burning of non-renewable fossil fuels emits excessive carbon dioxide, causing a series of problems such as the greenhouse effect and energy shortage. CO 2 It is an ideal raw material for organic synthesis. If this abundant C 1 Turning resources into treasures and converting them into low-carbon energy such as methane, methanol, dimethyl ether and low-carbon hydrocarbons can not only reduce CO in the atmosphere 2 The content of this product can also obtain new energy, which has the dual significance of solving environmental and e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B3/04C25B11/06C02F3/00C02F3/34C02F101/30C25B3/25
CPCC02F3/005C02F3/34C02F2101/30C25B3/25C25B11/091Y02W10/37Y02P20/10
Inventor 杨慧敏代红艳刘宪杜海燕简选胡雪艳梁镇海
Owner TAIYUAN UNIV OF TECH
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