Preparation method and application of iron atom loaded graphene-based nano material

Abstract

The invention discloses a preparation method of an iron atom-loaded graphene-based nano material. The preparation method comprises the following steps of 1, adding 50-100mg of anhydrous ferric chloride into a 25ml volumetric flask, and adding tetrahydrofuran for dissolving to prepare a 3mg / ml ferric chloride solution; 2, taking 10-20 mg of graphene oxide and putting into the 25 ml volumetric flask, adding tetrahydrofuran for dissolution, and adding 126 mu L of the ferric chloride solution with the concentration being 3 mg / ml prepared in the step 1; 3, stirring the mixed solution in the step 2 on a magnetic stirrer for 12-36 hours until the solvent tetrahydrofuran is completely volatilized and a solid mixture is formed; and 4, grinding the solid mixture obtained in the step 3 into powder, putting the powder into a calcining vessel, putting the calcining vessel into a high-temperature furnace for calcining, raising the temperature from the room temperature 25 DEG C to 400-600 DEG C at the temperature raising rate of 1-10 DEG C / min, preserving heat for 1-3 hours, and then cooling to the room temperature. According to the present invention, the nano material with high active site density and high monatomic loading capacity is successfully prepared only by a one-step calcination method, and the inert atmosphere adopted for combustion is relatively safer and easy to realize.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a preparation method and application of iron atom-supported graphene-based nanomaterials. Background technique [0002] The study of catalytic active sites is of great significance to the development of new high-efficiency catalysts. A large number of experimental facts have proved that only the atoms on the particle surface of metal and its alloy catalysts play a catalytic role, which greatly reduces the utilization rate of atoms. With the rise and prosperity of nanotechnology, it has been found that increasing the number of active sites is beneficial to improving the utilization rate and catalytic ability of catalysts. [0003] In recent years, with the introduction of the single-atom concept, the synthesized single-atom active-site catalysts exhibit high activity, high selectivity, and high stability. Catalysts are expensive, and resources are scarce for effective approache...

AI Technical Summary

Problems solved by technology

[0004] At present, most of the synthesized single-atom catalysts have problems such as low loading capacity and complicated preparation methods, which seriously restrict their large-scale commercial application.

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