Porous carbon-loaded molybdenum disulfide nanosheet composition material and preparation method and application thereof

Abstract

The invention discloses a porous carbon-loaded molybdenum disulfide nanosheet composition material and a preparation method and application thereof. The preparation method includes following steps: (1), utilizing porous carbon to adsorb molybdate to obtain a precursor; (2), in an inert atmosphere, thermally treating the precursor, and enabling sulfur steam to be in vulcanization reaction with the thermally-treated precursor to obtain the porous carbon-loaded molybdenum disulfide nanosheet composition material. Porous carbon adsorption is adopted to confine a molybdenum disulfide precursor, and a raw material precursor is directly converted into a highly-dispersed small-size ultrathin molybdenum sulfide nanosheet through vulcanization operation, so that compared with other methods like a lithium ion intercalation method, a vapor deposition method, a hydrothermal method and a solvothermal method, the preparation method is low in cost, simple in process, clear in product and suitable for large-scale production; the obtained composite material is excellent in water electrolysis hydrogen production catalytic performance and better than other reported similar catalysts.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation and catalysis, and in particular relates to a porous carbon-loaded molybdenum disulfide nanosheet composite material and a preparation method and application thereof. Background technique [0002] The rapid development of graphene research in recent years has made two-dimensional layered materials become a research hotspot again. This kind of layered structure is stacked by interlayer interaction force, and as the dimensionality decreases, the electronic structure of the material Compared with bulk materials, it is obviously different, which makes it show good application prospects in the field of microelectronics and catalysis. [0003] Molybdenum disulfide is a layered semiconductor material similar to graphene sheet structure. It not only has excellent electrical properties, but also has good catalytic activity, and has attracted more and more attention. Monolayer molybdenum d...

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Problems solved by technology

Although molybdenum disulfide can exhibit certain catalytic performance, the catalytic activity of micron-scale and bulk phase molybdenum disulfide is extremely low, and its application value is small. Its remarkable catalytic performance will only appear when the layer structure is

[0004] At present, the methods for preparing molybdenum disulfide nano-flakes include: 1) lithium ion intercalation method, but must be carried out under anhydrous and oxygen-free conditions, the experimental period is long, and the prepared molybdenum disulfide nano-flakes have many defects; 2) mechanical exfoliation method, The output is small and cannot be applied on a large scale; 3) the chemical deposition method has very little output and many by-products; 4) the hydrothermal synthesis method has complicated preparation steps and low output and cannot be used on a large scale

In general, the above methods are faced with various problems, especially in the practical application of electrolysis of water to hydrogen production, which is not conducive to the exposure of active sites, and it is easy to cause the loss of effective sites.

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