Highly uniform zinc oxide submicrospheres with controllable particle size and preparation method thereof

Abstract

The invention discloses highly uniform zinc oxide submicrospheres with controllable particle size and a preparation method thereof, which belong to the field of preparation of photonic crystal materials. According to the method, an alcohol-water system is adopted, so that the temperature and pressure required by synthesis of the zinc oxide microspheres are reduced, and the zinc oxide polycrystalline submicrospheres with good monodispersity are synthesized more cleanly. In the nucleation process, the temperature, the initial rotating speed, the zinc source and the deionized water amount are regulated and controlled, so that the nucleation process is rapidly carried out. In the growth process, mass transfer is further controlled by introducing polyhydric alcohol to control the viscosity of a system, and zinc oxide submicrospheres with stable particle sizes can be obtained through one-step reaction. According to the synthetic method, the zinc oxide submicrospherewith the specific target particle size can be obtained only by changing the amount of the zinc source and the variety and amount of the polyhydric alcohols. The adjustable particle size range of the zinc oxide submicrospheres prepared by the method is obviously enlarged, the adjustable range is 100-800 nm, and the monodispersity of the zinc oxide submicrospheres 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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