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

A kind of zinc oxide, submicron technology, applied in the field of highly uniform zinc oxide submicron ball and its preparation

Active Publication Date: 2022-04-12
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is no report on the one-step synthesis of zinc oxide submicron spheres using alcohol-water system and the precise adjustment of their particle size in a large range

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The monodisperse zinc oxide submicron spheres with a particle size of 460±10nm are prepared by a multi-step growth method of precisely controlling the particle size. The specific preparation method is:

[0029] 1) Weigh 6.00g of polyvinylpyrrolidone with an average molecular weight of 40000, measure 450ml of ethanol, and stir and disperse the polyvinylpyrrolidone in the ethanol solution at room temperature;

[0030] 2) Weigh 1.08g of zinc acetate dihydrate, measure 50ml of ethylene glycol, and disperse the zinc acetate dihydrate in the ethylene glycol solution with ultrasonic stirring at room temperature;

[0031] 3) Mix the solutions obtained in steps 1) and 2), heat to 75°C, and stir for 2-4h;

[0032] 4) Measure 15ml of deionized water, add the deionized water into the solution obtained in step 3) and stir rapidly for 2 minutes;

[0033] 5) Stir and react in an oil bath at 75°C for 1.5h;

[0034] 6) The obtained zinc oxide submicron spheres are washed with ethanol...

Embodiment 2

[0039] The monodisperse zinc oxide submicron spheres with a particle size of 150±10nm are prepared through a multi-step growth method of precisely controlling the particle size. The specific preparation method is:

[0040] 1) Weigh 6.00g of polyvinylpyrrolidone with an average molecular weight of 40000, measure 450ml of ethanol, and stir and disperse the polyvinylpyrrolidone in the ethanol solution at room temperature;

[0041] 2) Weigh 0.54g of zinc acetate dihydrate, measure 50ml of ethylene glycol, and disperse the zinc acetate dihydrate in the ethylene glycol solution with ultrasonic stirring at room temperature;

[0042] 3) Mix the solutions obtained in steps 1) and 2), heat to 75°C, and stir for 2-4h;

[0043] 4) Measure 15ml of deionized water, add the deionized water into the solution obtained in step 3) and stir rapidly for 2 minutes;

[0044] 5) Stir and react in an oil bath at 75°C for 1.5h;

[0045] 6) The obtained zinc oxide submicron spheres are washed with et...

Embodiment 3

[0048] The monodisperse zinc oxide submicron spheres with a particle size of 320±10nm are prepared through a multi-step growth method of precisely controlling the particle size. The specific preparation method is:

[0049] 1) Weigh 6.00g of polyvinylpyrrolidone with an average molecular weight of 40000, measure 450ml of ethanol, and stir and disperse the polyvinylpyrrolidone in the ethanol solution at room temperature;

[0050] 2) Weigh 0.81g of zinc acetate dihydrate, measure 50ml of ethylene glycol, and disperse the zinc acetate dihydrate in the ethylene glycol solution with ultrasonic stirring at room temperature;

[0051] 3) Mix the solutions obtained in steps 1) and 2), heat to 75°C, and stir for 2-4h;

[0052] 4) Measure 15ml of deionized water, add the deionized water into the solution obtained in step 3) and stir rapidly for 2 minutes;

[0053] 5) Stir and react in an oil bath at 75°C for 1.5h;

[0054] 6) The obtained zinc oxide submicron spheres are washed with et...

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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. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G9/02B82Y30/00B82Y40/00
CPCC01G9/02B82Y30/00B82Y40/00C01P2004/62C01P2004/32
Inventor 武素丽任杰
Owner DALIAN UNIV OF TECH
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