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Zinc oxide hollow microspheres and preparation method thereof

A technology of zinc oxide and microspheres, applied in the direction of zinc oxide/zinc hydroxide, etc., can solve the problems of high cost and energy consumption, complex process and other problems of thermal evaporation method, and achieve low sample dislocation density, wide application value and high output high rate effect

Inactive Publication Date: 2011-01-19
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the preparation method of ZnO hollow spheres mainly contains template method (Xi Wang, Peng Hu, Yuan Fangli, and Lingjie Yu, Preparation and Characterization of ZnO Hollow Spheres and ZnO-Carbon Composite Materials Using Colloidal Carbon Spheres as Templates, Journal of Physical Chemistry C, 2007, 111, 6706-6712) and evaporation method (Pu Xian Gao and Zhong Lin Wang, Mesoporous Polyhedral Cages and Shells Formed by Textured Self-Assembly of ZnO Nanocrystals, Journal of the American Chemical Society, 2003, 125, 11299- 11305), however, both the template method and the thermal evaporation method have disadvantages. The template method requires a relatively complicated process, and the thermal evaporation method has high cost and energy consumption.

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  • Zinc oxide hollow microspheres and preparation method thereof
  • Zinc oxide hollow microspheres and preparation method thereof
  • Zinc oxide hollow microspheres and preparation method thereof

Examples

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Effect test

Embodiment 1

[0017] 1) Dissolve zinc nitrate hexahydrate and hexamethylenetetramine in deionized water, add sodium citrate while stirring at room temperature, and prepare a uniform transparent solution after stirring and dissolving, wherein zinc nitrate hexahydrate and hexamethylenetetramine The molar concentration of tetraamine is 1:2, and the volume of deionized water is 20mL. After fully stirring and dissolving, configure Zn 2+ A mixed solution with a molar concentration of 0.1mol / L and a sodium citrate concentration of 0.02mol / L;

[0018] 2) Put the mixed solution into a closed high-pressure reaction kettle, then put the high-pressure reaction kettle into an electric heating constant temperature blast drying oven, and conduct a hydrothermal reaction at 120°C for 2 hours;

[0019] 3) Cool down to room temperature naturally after the reaction, open the autoclave, filter the white precipitate, wash twice with deionized water, then wash twice with absolute ethanol, and dry at 50°C for 3 ho...

Embodiment 2

[0022] 1) Dissolve zinc nitrate hexahydrate and hexamethylenetetramine in deionized water, add sodium citrate while stirring at room temperature, and prepare a uniform transparent solution after stirring and dissolving, wherein zinc nitrate hexahydrate and hexamethylenetetramine The molar concentration of tetraamine is 1:1, and the volume of deionized water is 24mL. After fully stirring and dissolving, configure Zn 2+ A mixed solution with a molar concentration of 0.2mol / L and a sodium citrate concentration of 0.04mol / L;

[0023] 2) Put the mixed solution into a closed high-pressure reaction kettle, then put the high-pressure reaction kettle into an electric constant temperature blast drying oven, and perform a hydrothermal reaction at 140°C for 7 hours;

[0024] 3) Cool down to room temperature naturally after the reaction, open the autoclave, filter the white precipitate, wash twice with deionized water, then wash twice with absolute ethanol, and dry at 55°C for 4 hours to o...

Embodiment 3

[0026] 1) Dissolve zinc nitrate hexahydrate and hexamethylenetetramine in deionized water, add sodium citrate while stirring at room temperature, and prepare a uniform transparent solution after stirring and dissolving, wherein zinc nitrate hexahydrate and hexamethylenetetramine The molar concentration of tetraamine is 2:1, and the volume of deionized water is 28mL. After fully stirring and dissolving, configure Zn 2+ A mixed solution with a molar concentration of 0.3mol / L and a sodium citrate concentration of 0.06mol / L;

[0027] 2) Put the mixed solution into a closed high-pressure reaction kettle, then put the high-pressure reaction kettle into an electric heating constant temperature blast drying oven, and conduct a hydrothermal reaction at 160°C for 12 hours;

[0028]3) Cool down to room temperature naturally after the reaction, open the autoclave, filter the white precipitate, wash twice with deionized water, then wash twice with absolute ethanol, and dry at 60°C for 5 ho...

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Abstract

The invention discloses zinc oxide hollow microspheres and a preparation method thereof. The invention relates to an inorganic nano material, and provides the zinc oxide hollow microspheres and the preparation method thereof. The zinc oxide hollow microspheres are made of wurtzite structural zinc oxide with powder diffraction standard joint committee number 36-1451, the diameters of the microspheres are 5 to 8 microns, and the thicknesses of the sphere walls are 0.5 to 1 micron. The preparation method comprises the following steps of: dissolving zinc nitrate hexahydrate and hexamethylene tetramine into water to obtain solution A, and adding sodium citrate into the solution A to obtain solution B; putting the solution B into a closed high pressure reactor, and putting the high pressure reactor into a drying oven to perform hydrothermal reaction; and after the hydrothermal reaction, cooling the reaction product to room temperature, opening the high pressure reactor, and filtering, washing and drying the sediment to obtain the zinc oxide hollow microspheres. The preparation method has the advantages of simplicity, convenience, low temperature, high yield and low sample dislocation density; and the zinc oxide hollow microspheres have broad application value in the fields of medicament release, photocatalysis, dye-sensitized solar cells and the like.

Description

technical field [0001] The invention relates to an inorganic nanometer material, in particular to a zinc oxide hollow microsphere and a preparation method thereof. Background technique [0002] Zinc oxide (ZnO) is an important direct wide bandgap semiconductor material with a bandgap width of 3.37eV at room temperature and an exciton binding energy as high as 60meV, which is greater than the ionization energy at room temperature of 26meV. Nano-ZnO materials with different morphologies, such as nanowires, nanotubes, nanobelts, and nano-rings, have great differences in performance. These nanostructured ZnO materials show many excellent properties different from bulk ZnO materials. , play an important role in the preparation of nano-optoelectronic devices and nano-electronic devices. [0003] Among the many morphologies of zinc oxide, hollow spherical nanomaterials are a large class of important nanostructure materials, which have low density, high specific surface area, large...

Claims

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Application Information

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IPC IPC(8): C01G9/02
Inventor 徐进王韦强徐丽丽
Owner XIAMEN UNIV
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