Synthetic method for nitrogen-doped porous carbon, and application of nitrogen-doped porous carbon in positive electrode of microbial fuel cell

Abstract

The invention discloses a synthetic method for nitrogen-doped porous carbon N-C, and an application of the nitrogen-doped porous carbon in a positive electrode of a microbial fuel cell. The synthetic method comprises the following steps of taking melamine as a nitrogen source, and taking sodium citrate as a carbon source, mixing and grinding the melamine and the sodium citrate based on a certain proportion; and calcining the mixture in inert gas Ar at a temperature of 800 DEG C for 5h to successfully prepare the nitrogen-doped porous carbon N-C which is used as the microbial positive electrode material. The synthetic method and the application have the advantages as follows: on one hand, when the nitrogen-doped porous carbon N-C is used as the positive electrode of the microbial fuel cell, the attachment of electrogenesis microbes in the positive electrode can be facilitated; and on the other hand, the positive electrode activation overpotential is lowered, so that the electrogenesis power density of the microbial fuel cell is remarkably improved.

Description

technical field [0001] The invention relates to a synthesis method of nitrogen-doped porous carbon and its application in microbial fuel cell anodes. Background technique [0002] Due to the shortage of global fossil energy and the huge harm to the environment caused by the exploitation and use of fossil energy, it is imminent to explore renewable and environmentally friendly new energy. Microbial Fuel Cells (MFCs), as a new and challenging field, is a device that can achieve energy conversion and has capacity. It can directly convert the chemical energy contained in complex organic biomass into electrical energy (that is, realize organic water treatment, and convert the energy of organic matter in wastewater into usable electrical energy), so it has attracted widespread attention from all over the world. rapid research progress. However, therefore, microbial fuel cells are still far from meeting the requirements of actual production or living power sources. In order to im...

AI Technical Summary

Problems solved by technology

Although carbon materials have good electrical conductivity, which is conducive to the conduction of electrons, the surface energy state of carbon elements is relatively high, and it is easy to lose electrons and show reductivity. If electrons want to jump to the carbon electrode, it usually requires higher energy, resulting in Larger anodic activation overpotential

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