Monodisperse Cu2O single crystal solid sphere with controllable particle size and preparation method thereof

Abstract

The invention discloses a monodisperse Cu2O single crystal solid sphere with a controllable particle size and a preparation method thereof. A micromolecule ligand at least comprises two carboxyl groups, and a high-molecular ligand is polyvinylpyrrolidone. The specific process comprises the following steps: preparing a copper source, the high-molecular ligand, the micromolecule ligand and a mixed solution of water and polyhydric alcohol, then dropwise adding a certain amount of an alkali solution into the solution, adding a reducing agent step by step at 20-80 DEG C, and carrying out centrifuging to obtain the monodisperse Cu2O single crystal solid sphere. According to the monodisperse Cu2O single crystal solid sphere with controllable particle size and the preparation method thereof, operation is simple and cost is low, and the monodisperse Cu2O single crystal solid sphere with a particle size of 40-600 nm can be obtained only by adjusting the amount and variety of the micromolecule ligand. The microsphere provided by the invention can be widely applied to the fields of photonic crystals, electrodes of lithium-sulfur batteries, and catalytic photolysis of water.

Description

technical field [0001] The invention relates to a monodisperse Cu with adjustable particle size 2 O single crystal solid sphere and preparation method thereof, belonging to Cu 2 The technical field of preparation of O single crystal microspheres. Background technique [0002] Cuprous oxide is a P-type semiconductor material with a theoretical refractive index of 2.7, which has been widely used in photolysis of water, catalysts, lithium-sulfur battery electrodes, and photonic crystals. Usually the building blocks of photonic crystals are low refractive index such as PS, SiO 2 etc. will lead to weaker photonic bandgap and pale structural color, in recent years with high refractive index microspheres such as TiO 2 , ZnS, CdS, etc., as the building blocks of photonic crystals, make them have low-angle correlation and high-brightness structural colors and other excellent properties, which have attracted extensive attention of researchers at home and abroad. However, most of t...

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Problems solved by technology

At room temperature, the precursor copper hydroxide is reduced by ascorbic acid to obtain polyhedral-like single crystal cuprous oxide microspheres (see S.R.Zhang, R.B. Jiang, Y.M.Xie, Q.F.Ruan, B.C.Yang, J.F.Wang, H.Q.Lin, Adv Mater., 2015 , 27, 7432-7439. and Y.K.Bai,; T.F.Yang, Q.Gu, G.heng, R.Zheng, Powder Technol., 2012, 227, 35-42S.), but their surfaces have obvious faces and Leng is not a sphere in the true sense. At present, there is no report on the preparation of a real solid solid single crystal sphere at room temperature and the precise adjustment of particle size.

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