Preparation method of zinc oxide microsphere with nanoflower-shaped microstructure

Abstract

The invention relates to a preparation method of a zinc oxide microsphere with a nanoflower-shaped microstructure. The method comprises the following steps of: (1) preparing a solution, to be specific, preparing a soluble zinc salt into an aqueous solution, and preparing a soluble alkali into an aqueous solution; (2) mixing the solutions, to be specific, mixing the soluble zinc salt aqueous solution with the soluble alkali aqueous solution at the room temperature in the volume ratio of 1:10-10:1, slowly pouring an aqueous solution of a soluble zinc salt into the aqueous solution of the soluble alkali, and stirring to obtain a clarifying solution; and (3) preparing a product, to be specific, pouring a weakly-acid solution into the clarifying solution obtained in the step (2), wherein the volume ratio of the weakly-acid solution to the clarifying solution is 1:10-10:1, stirring to obtain a turbid solution containing a large quantity of products, repeatedly washing with deionized water and absolute ethyl alcohol, and drying in a baking oven to obtain a final product. Compared with the prior art, the method has the advantages of capability of rapidly, easily and conveniently preparing a product under the room temperature condition, high yield, low cost, environmental friendliness, wide raw material selection range and contribution to industrial production.

Description

technical field [0001] The invention relates to a method for preparing an oxide semiconductor material, in particular to a method for preparing zinc oxide microspheres with a nano flower-like microstructure. Background technique [0002] As a wide bandgap semiconductor material with a bandgap width of 3.37eV, zinc oxide is non-toxic, and the raw material is cheap and easy to obtain. It has excellent piezoelectric, photoelectric and dielectric properties. Among them, nano-zinc oxide is widely used in the fields of gas sensitivity, photocatalysis, antibacterial and photoelectric materials, but its nano-scale size range brings difficulties to recycling and is not conducive to recycling. Therefore, it is hoped to find a method that can both A zinc oxide product that maintains most of the properties of nanomaterials and is conducive to recycling. [0003] ZnO nanosheets are a readily available nanostructure. In this form, ZnO has a large surface area and very good photochemical ...

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Problems solved by technology

For example, the Chinese patent (CN101249979B) reports a water bath preparation method of prickly spherical zinc oxide. The water bath synthesis method needs ultrasonic activation treatment, the solution needs to be diluted with water, and the water bath temperature must reach the boiling point and need to be stirred. Therefore, the process is relatively complicated and engineering scale-up It is not easy; the literature (Journal of Crystal Growth 282 (2005) 165-172) reports similar ZnO nanostructures, the method adopts the solvothermal method of absolute ethanol as the medium, and the solvent temperature is 190 ° C; Chinese patent (CN102249286A) reports a A method for preparing zinc oxide microspheres in a normal-pressure water bath. The mixed solution needs to be kept in a water bath at 70°C for 10 to 24 hours. The obtained microspheres only have a lamellar structure on the surface, and the extensibility is limited, so the ratio cannot be maximized. Surface area; In addition, Chinese patent (CN102303896A) reports a method for preparing zinc oxide with a hollow flower-shaped micron structure, which requires stirring the mixed solution for 0.1 to 2 hours, and after preheating at 40°C to 60°C, it also needs to be heated at 60°C to 200°C. Reaction at ℃ for 1~48h

Although the above method can prepare more qualified zinc oxide microspheres, the above method has the following disadvantages: the preparation is slow and the process is complicated, and the resulting impact is time-consuming and high cost of preparation. , which is contrary to the green environmental protection economic strategy advocated by the state

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