Method for preparing graphene simultaneously doped with nitrogen and sulfur through biological reduction

Abstract

The invention provides a method for preparing graphene simultaneously doped with nitrogen and sulfur through biological reduction, and belongs to the technical fields of graphene synthesis and a nano material. The method is characterized in that oxidized graphene dispersion solution is used as a raw material, sulfate-containing reduction bacteria suspension is used as a biological reduction agent, the raw material is reacted with the biological reduction agent for 5 to 10 days in a control reaction system under an air insulation condition to obtain a graphene solution, and the graphene solution is centrifugally filtered and repeatedly washed to obtain graphene doped with nitrogen and sulfur. According to the method, no stabilizer or dispersing agent is added, and oxidized graphene is reduced by utilizing the metabolic activity of the microorganisms to obtain graphene doped with nitrogen and sulfur, so that the method has the advantages of safety, no toxicity, simplicity in operation, environmental friendliness and the like, the difficulty that nitrogen and sulfur cannot be simultaneously doped in the existing graphene preparation method can be solved, when graphene simultaneously doped with the nitrogen and sulfur is applied to the fields such as electrochemical sensors, electric catalysis and the like, the detection limit and the detection sensitivity can be remarkably improved, and the application prospect is promising.

Description

technical field

[0001] The invention relates to a method for preparing graphene simultaneously doped with nitrogen and sulfur, and belongs to the technical field of graphene synthesis and nanomaterials, in particular to a method for preparing graphene based on sulfate-reducing bacteria (SRB) reduction. Background technique

[0002] Graphene is a unique two-dimensional planar structure single-layer carbon nanomaterial, and the carbon atoms are connected by covalent bonds to form a hexagonal honeycomb structure. This unique structural feature of graphene makes it have good electrical, mechanical and thermal properties. In recent years, it has broad application prospects in microelectronics, new superconducting materials, energy storage, sensors and electrocatalysis. At the same time, basic and applied research on graphene is also in full swing around the world.

[0003] The research on the preparation method of graphene is the premise of its basic and applied research. The c...

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