Modification method of active groups on anode surface of microbial fuel cell

Abstract

The invention provides a modification method of active groups on the anode surface of a microbial fuel cell. The modification method is characterized by comprising the steps of: A. pretreatment on an anode substrate: putting the anode substrate of the microbial fuel cell into a container, adding an analytically pure acetone solution until the anode substrate is completely submerged by acetone, sealing a mouth of the container by using a plastic wrap, taking out the anode substrate after standing for 24h, washing the anode substrate to be clean by using deionized water, and then putting the anode substrate into an oven at 65-85 DEG C to be dried for later use; B. carrying out electrolysis on the pretreated anode substrate; and C. putting the pretreated anode substrate into an aqueous solution of ammonia for restructuring functional groups. In the modification method, a combination of electrochemical way and a chemical way is adopted for modifying the anode substrate, and formed active groups are beneficial to the electron transfer among bacteria and an electrode so as to improve the performance of the microbial fuel cell; and the modification method is simple, low in energy consumption, convenient to operate and low in cost, and has a good application prospect.

Description

technical field [0001] The invention relates to a microbial fuel cell, in particular to a method for modifying active groups on the surface of the anode of the microbial fuel cell. Background technique [0002] Microbial Fuel Cells (MFCs) is a kind of biomass energy, which has the unique advantages of wide source of raw materials, mild reaction conditions, good biocompatibility, and wastewater treatment while generating electricity, and has become a global renewable energy source. focus of researchers' attention. However, due to the low power generated by microbial fuel cells at present, efforts are being made to break through the factors that limit its low production capacity. Since the anode material is the attachment substrate of the biofilm, its characteristics are closely related to the rate of biofilm oxidation of the organic substrate, therefore, the anode material becomes a very important limiting factor. At the same time, studies have found that the modification o...

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Problems solved by technology

[0004] However, in the above treatment methods, the degree of performance improvement after chemical modification is not very high, and high temperature heat treatment is relatively energy-consuming. When modified with polymers, the conductivity of the electrode itself will be made changes, and this preprocessing method is also more complicated

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