Method for preparing two-dimensional nano boron nitride with jet flow cavitation technology

Abstract

The invention discloses a method for two-dimensional nano boron nitride with a jet flow cavitation technology. The method comprises the following seven steps of: 1, preparing three kinds of raw materials such as boron nitride powder and the like into a boron nitride aqueous solution according to a certain weight ratio, putting the solution into a material storing tank; 2, making the boron nitrideaqueous solution enter a plunger pump from the material storing tank, and pressurizing the solution to a specified pressure; 3, making the boron nitride aqueous solution enter a cavitation generator for lamellar striping to obtain a solution containing single-layer and multi-layer two-dimensional nano boron nitride; 4, cooling the solution containing single-layer or multi-layer two-dimensional nano boron nitride to the room temperature with water; 5, making the solution obtained in the step 4 reenter the material storing tank, the plunger pump and the cavitation generator, and repeating the steps 3 and 4 to form a cycle of the preparation process; 6, running a system for 5-100 minutes till processing is finished, and shutting down the system; and 7, taking the solution obtained in the step 6 out of the material storing tank, and pouring into a precipitating tank for precipitating to obtain supernatant fluid, i.e., the needed two-dimensional nano boron nitride solution. The method has the advantages of advanced process, low cost, no pollution and realization of industrial large-scale production.

Description

technical field [0001] The invention relates to a method for preparing two-dimensional nano-boron nitride by jet cavitation technology, which belongs to a technology for efficiently preparing two-dimensional nano-boron nitride by using a mechanical method, and specifically relates to a preparation device and method for two-dimensional nano-boron nitride . 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 stripping. It can be used...

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Problems solved by technology

[0004] At present, the preparation methods of two-dimensional nano boron nitride mainly include arc discharge method, solvothermal method, vapor phase deposition method and liquid phase method. Although arc discharge method, solvothermal method and vapor phase deposition method can prepare high-quality two-dimensional nanometer Boron nitride, but due to the limitations of the preparation method, it cannot meet the needs of mass production of two-dimensional nano-boron nitride

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

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