Method for preparing two-dimensional nano molybdenum disulfide by jet cavitation technology

Abstract

The invention discloses a method for preparing two-dimensional nano molybdenum disulfide by a jet cavitation technology. The method comprises seven major steps of: 1, preparing three raw materials of molybdenum disulfide powder and the like into molybdenum disulfide aqueous solution in a weight ratio and then filling in a storage tank; 2, feeding the molybdenum disulfide aqueous solution into a plunger pump from the storage tank and pressurizing to a specified pressure; 3, feeding the molybdenum disulfide aqueous solution into a cavitation generator to strip off flakes to obtain solution containing single-layer two-dimensional nano molybdenum disulfide and multi-layer two-dimensional nano molybdenum disulfide; 4, water-cooling the solution containing single-layer two-dimensional nano molybdenum disulfide and multi-layer two-dimensional nano molybdenum disulfide to room temperature; 5, feeding the solution obtained by the step 4 into the storage tank, the plunger pump and the cavitation generator again, and repeating the steps 3 and 4 to form a cycle of a preparation process; 6, operating a system for 5-100 minutes, then finishing and closing the system; and 7, taking the solution obtained by the step 6 from the storage tank and pouring into a precipitation tank, wherein supernatant obtained after precipitation is required two-dimensional nano molybdenum disulfide solution. Themethod has the advantages of advanced process, low cost, no pollution and capability of realizing industrial large-scale production.

Description

technical field [0001] The invention relates to a method for preparing two-dimensional nano-molybdenum disulfide by jet cavitation technology, which belongs to a technology for efficiently preparing two-dimensional nano-molybdenum disulfide by using a mechanical method, and specifically relates to a preparation device and method for two-dimensional nano-molybdenum disulfide . Background technique [0002] The basic unit of nanomaterials can be divided into zero-dimensional, one-dimensional and two-dimensional nanomaterials according to the spatial dimension. Among them, two-dimensional nanomaterials refer to materials with only one dimension in the order of nanometers in the three-dimensional space. Among many nanomaterials, the special nanoscale layered structure obtained by inorganic layered compounds has attracted widespread interest. It can not only provide a unique nanoscale reaction space for many chemical reactions, but also the nanoscale monolithic layer after strip...

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Problems solved by technology

[0004] At present, the preparation methods of two-dimensional nanomolybdenum disulfide mainly include high-voltage arc method, redox method, vapor deposition method and liquid phase method, among which high-voltage arc method, redox method and vapor phase deposition method can prepare high-quality two-dimensional nano Molybdenum disulfide, but due to the limitation of the preparation method, it cannot meet the needs of mass production of two-dimensional nano-molybdenum disulfide

Recently, foreign related research has reported the preparation of two-dimensional nano-molybdenum disulfide in liquid phase. From the atomic force microscope (AFM) pictures in the report, it can be seen that the quality of two-dimensional nano-molybdenum disulfide prepared by these methods is not perfect. , however, direct dispersion and exfoliation of MoS2 in the liquid phase may be an effective method for low-cost, large-scale preparation of two-dimensional nano-MoS2

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