A highly uniform zinc oxide submicron sphere with controllable particle size and its preparation method

Abstract

The invention discloses a highly uniform zinc oxide submicron sphere with controllable particle size and a preparation method thereof, belonging to the field of preparation of photonic crystal materials. The method adopts an alcohol-water system, reduces the temperature and pressure required for the synthesis of zinc oxide microspheres, and synthesizes zinc oxide polycrystalline submicron spheres with good monodispersity more cleanly. During the nucleation process, the nucleation process can be carried out rapidly by adjusting the temperature, the initial rotation speed, the zinc source and the amount of deionized water. During the growth process, the mass transfer is further controlled by introducing polyol to control the viscosity of the system, and zinc oxide submicron spheres with stable particle sizes can be obtained in one step. According to the above synthesis method, zinc oxide submicron spheres with a specific target particle size can be obtained only by changing the amount of zinc source and the type and amount of polyol. The adjustable particle size range of zinc oxide submicron spheres prepared by this method is significantly increased, and the controllable range is 100nm-800nm, and the monodispersity of zinc oxide submicron spheres is good.

Description

technical field

[0001] The invention relates to a highly uniform zinc oxide submicron sphere with controllable particle size and a preparation method thereof, belonging to the field of preparation of photonic crystal materials. Background technique

[0002] ZnO is a II-VI semiconductor material with a theoretical refractive index of 2.1, a direct bandgap of about 3.4eV, and an exciton binding energy of about 60meV, which makes it thermally stable at room temperature. ZnO has been widely used in the fields of photo-splitting water, nanogenerators, high-sensitivity sensors, and photonic crystals. Studies have found that semiconductor materials at the micro-nano scale exhibit many unique physical and chemical phenomena, such as quantum effects, nonlinear optical effects, and so on. Monodisperse microspheres eliminate the influence of shape on material properties, and the controllable particle size of microspheres can further study the influence of material size on properties. ...

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