Magnetic three-dimensional gel-sphere anode material of microbial fuel cell and preparation method

Abstract

The invention discloses a magnetic three-dimensional gel-sphere anode material of a microbial fuel cell and a preparation method. The preparation method comprises the following specific steps: (1) dropwise adding a FeCl2 solution into a graphene oxide dispersion solution to obtain a graphene oxide-FeCl2 dispersion solution; (2) dropwise adding sodium benzenesulfinate into the dispersion solution drop by drop, so as to obtain a graphene oxide-FeCl2-sodium benzenesulfinate dispersion solution; (3) adding glacial acetic acid into the dispersion solution; (4) adding chitosan into the dispersion solution to obtain slurry; (5) adding the slurry into a NaOH solution to obtain gel spheres; (6) heating the gel spheres at constant temperature to obtain a gel-sphere anode. The method disclosed by theinvention is simple and has moderate conditions and low production cost; an obtained electrode has a large specific surface area and good biocompatibility; the gel-sphere electrode is used as anode chamber filling of the microbial fuel cell; the transferring capability of extracellular electrons is increased and the space utilization rate of an anode chamber is also greatly improved.

Description

technical field [0001] The invention relates to a magnetic three-dimensional gel ball anode material of a microbial fuel cell and a preparation method thereof, belonging to the technical field of new energy and resource utilization. Background technique [0002] With the depletion of resources such as oil, coal and natural gas, people have gradually begun to realize the importance of resource utilization from production and domestic waste, and various countries are working hard to develop new technologies to realize the secondary utilization of energy. For example, using traditional methods to treat domestic sewage not only consumes a lot of energy, but also occupies a huge area. This kind of organic wastewater itself is rich in nutrients and contains huge energy. Microbial fuel cells catalyze and oxidize organic pollution with microorganisms, convert the chemical energy stored in sewage into electrical energy, and at the same time purify sewage. A green energy technology w...

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Problems solved by technology

[0003] The process of microorganisms catalyzing the degradation of pollutants and generating electrons mainly occurs on the surface of the anode electrode material. The surface roughness, specific surface area, conductivity, chemical stability and biocompatibility of the anode material will affect the growth of microorganisms on its surface. seriously affect the performance of microbial fuel cells

At present, the commonly used electrode materials mainly include carbon materials such as carbon paper, carbon cloth, carbon felt, carbon brush, graphite sheet or graphite rod, although the use of such carbon materials greatly promotes the transfer ability and energy of extracellular electrons. output, but there is still a lot of room for improvement in the space utilization of the anode chamber and the biocompatibility of the anode material.

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