Equipment and method for synthetizing nano material based on supergravity-ion exchange

Abstract

The invention discloses a method and equipment for synthetizing a nano material based on supergravity-ion exchange coupling. The invention is characterized in that the product synthesis and the synchronous purification are realized by an ion exchange filler surface ion exchange reaction under the condition of a supergravity field by a composite function filler which takes the ion exchange fiber as a main body, and the size distribution of the product is controlled by the surface shear force of the function filler in the supergravity field and the modulation of a product absorption function. The method comprises the following steps: (1) preparing an assembled type ion exchange composite function filler; (2) previously exchanging a reactant ion onto the surface of the composite function filler; and (3) introducing a precipitator to perform a composite function filler surface ion exchange reaction so as to obtain the material. The supergravity-ion exchange technology is suitable for the controllable synthesis of the indissolvable ionic compound or metallic oxide, an inorganic salt precursor is adopted for the all, and no surface active agent is introduced, and the function filler is recyclable after regenerating, so that the whole synthesis process is free from the discharge of waste liquid, thereby being environment-friendly.

Description

technical field [0001] The invention relates to a synthesis device and method of high-purity nanometer materials. Background technique [0002] During the synthesis of nanomaterials, the degree of agglomeration of crystal nucleus particles is related to the nucleation induction period of grains (t N ) and microscopic mixing homogenization characteristic time (t m )related. The new High Gravity Technology (HIGEE), which enhances mass transfer in modern chemical industrial processes, has been tried to be applied to the synthesis of nanomaterials, showing broad application prospects and potential economic benefits. In the hypergravity environment, the mixed mass transfer has been greatly enhanced, and the molecular mixing time is on the order of 100 μs. Compared with the liquid phase synthesis processes such as hydrothermal method, sol-gel method and microemulsion method, the nucleation process can be greatly improved. It is carried out in a microscopically uniform environme...

AI Technical Summary

Problems solved by technology

However, the introduction of gas in the synthesis of nanomaterials makes the actual industrial production equipment very complicated, and a large amount of excess reaction gas (such as CO 2 , NH 3 etc.) will also cause severe environmental pollution and waste of resources, which has become a bottleneck for the practical application of high gravity technology to the synthesis of nanomaterials.

On the other hand, inert fillers are used in traditional high-gravity reactors, and the full dispersion and contact of precursors is completely dependent on high field strength and high energy consumption, which also limits the further promotion of this method.

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