Self-assembly zinc oxide hollow sphere and preparation method thereof

A technology of zinc oxide and hollow spheres, applied in the direction of zinc oxide/zinc hydroxide, etc., can solve the problems of high cost and energy consumption, expensive production equipment, and difficulty in large-scale production, and achieve low equipment requirements, simple operation, and wide application value effect

Inactive Publication Date: 2010-06-09
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Normally, the preparation of zinc oxide hollow spheres requires multiple steps, such as the template method (J.Phys.Chem.B, 2008, 112:16-22) and Oswald ripening (Mater.Lett, 2007, 61: 1060~1063) growth requires relatively complex operation process, which has certain limitations, while the chemical vapor deposition process (J.Phys.Chem.B, 2006, 110: 23211~23214) has expensive production equipment, relatively high cost and energy consumption. High, not easy to mass-produce

Method used

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  • Self-assembly zinc oxide hollow sphere and preparation method thereof
  • Self-assembly zinc oxide hollow sphere and preparation method thereof
  • Self-assembly zinc oxide hollow sphere and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Zinc nitrate hexahydrate and urea raw material are dissolved in the mixed solvent that ethylene glycol and deionized water form, wherein the molar concentration of zinc nitrate hexahydrate and urea is 1: 5, and the volume ratio of ethylene glycol and deionized water is 1:3, fully stirred and dissolved to form Zn 2+ Precursor solution with a molar concentration of 0.1M;

[0026] (2) Put the precursor solution into a closed autoclave, then put the autoclave into an electric heating constant temperature blast drying oven, and perform solvothermal reaction at 110° C. for 6 hours;

[0027] (3) After the reaction in step (2), cool naturally to room temperature, open the autoclave, filter the reaction product, wash twice with deionized water, then wash twice with absolute ethanol, and dry at 50°C for 3 hours to obtain Basic zinc carbonate precursor.

[0028] (4) Put the basic zinc carbonate precursor in a tubular heat treatment furnace, raise the temperature to 300° C. a...

Embodiment 2

[0031] (1) Zinc nitrate hexahydrate and urea raw material are dissolved in the mixed solvent that ethylene glycol and deionized water form, wherein the molar concentration of zinc nitrate hexahydrate and urea is 1: 7, and the volume ratio of ethylene glycol and deionized water is 1:1, fully stirred and dissolved to form Zn 2+ Precursor solution with a molar concentration of 0.2M;

[0032] (2) Put the precursor solution into a closed autoclave, then put the autoclave into an electric heating constant temperature blast drying oven, and perform solvothermal reaction at 120° C. for 9 hours;

[0033] (3) After the reaction in step (2), cool naturally to room temperature, open the autoclave, filter the reaction product, wash twice with deionized water, then wash twice with absolute ethanol, and dry at 55°C for 4 hours to obtain Basic zinc carbonate precursor.

[0034] (4) Put the basic zinc carbonate precursor in a tubular heat treatment furnace, raise the temperature to 350° C. a...

Embodiment 3

[0036](1) Zinc nitrate hexahydrate and urea raw material are dissolved in the mixed solvent that ethylene glycol and deionized water form, wherein the molar concentration of zinc nitrate hexahydrate and urea is 1: 10, and the volume ratio of ethylene glycol and deionized water is 3:1, fully stirred and dissolved to form Zn 2+ Precursor solution with a molar concentration of 0.3M;

[0037] (2) Put the precursor solution into a closed autoclave, then put the autoclave into an electric heating constant temperature blast drying oven, and perform solvothermal reaction at 130°C for 12 hours;

[0038] (3) After the reaction in step (2), cool naturally to room temperature, open the autoclave, filter the reaction product, wash twice with deionized water, then wash twice with absolute ethanol, and dry at 60°C for 5 hours to obtain Basic zinc carbonate precursor.

[0039] (4) Put the basic zinc carbonate precursor in a tubular heat treatment furnace, raise the temperature to 400° C. at...

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Abstract

The invention provides a self-assembly zinc oxide hollow sphere and a preparation method thereof, relating to a method for preparing an inorganic nanometer material. The invention provides the self-assembly zinc oxide hollow sphere and the preparation method thereof. The self-assembly zinc oxide hollow sphere is wurtzite structure zinc oxide with the JCPDS number of between 36 and 1,451, and is assembled by a laminated nanometer structure with the dimension of between 1 and 2 mu meters, wherein the diameter of the hollow sphere is between 5 and 20 mu meters, and the wall thickness of the hollow sphere is between 0.5 and 2 mu meters. The method comprises the following steps: dissolving zinc nitrate hexah and urea in mixed solvent comprising glycol and deionized water; preparing precursor solution after stirring and dissolving; placing the precursor solution in an airtight high-pressure reaction kettle, and placing the high-pressure reaction kettle in an electrothermal constant-temperature air-blowing drying oven for solvent thermal reaction; cooling the high-pressure reaction kettle to room temperature after the solvent thermal reaction, opening the high-pressure reaction kettle, filtering, washing and drying the reaction product to obtain basic zinc carbonate precursor; and placing the basic zinc carbonate precursor in a tube type heat treatment furnace for thermal treatment.

Description

technical field [0001] The invention relates to a method for preparing inorganic nanometer materials, in particular to a method for preparing self-assembled zinc oxide hollow spheres. Background technique [0002] Zinc oxide is an important direct wide-bandgap semiconductor material. The bandgap at room temperature is 3.37eV, and the exciton binding energy is as high as 60meV, which is greater than the ionization energy of 26meV at room temperature. Nanomaterials show different properties from bulk materials. Surface effect, volume effect, quantum effect, etc. Therefore, nano-zinc oxide has very broad application prospects in the fields of optics, optoelectronics, solar cells, photocatalysis, biosensing, and field emission. At present, the structure control and performance research of nano-zinc oxide has become a research hotspot in nanotechnology. : 215-218), nanocones (Langmuir, 2006, 22: 6335-6340), hexagonal nano-sheets (Angew. Chem. Int. Ed, 2004, 43: 5238-5242) and ot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G9/02
Inventor 王韦强徐进
Owner XIAMEN UNIV
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