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Preparation method for ZnO nanosphere with yolk-eggshell structure

A technology of nanospheres and eggshells, which is applied in the field of preparation of ZnO nanospheres with egg yolk-eggshell structure, can solve the problems of complicated preparation process and easy damage of the outer shell material, and achieve the advantages of simple preparation process and low cost Effect

Inactive Publication Date: 2012-10-03
LANZHOU UNIVERSITY
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AI Technical Summary

Problems solved by technology

Due to the complex preparation process of the material structure prepared by the template method, porous soft / hard templates or toxic solvents are often used, and the outer shell material is easily damaged, so the application of this method has great limitations.

Method used

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  • Preparation method for ZnO nanosphere with yolk-eggshell structure
  • Preparation method for ZnO nanosphere with yolk-eggshell structure
  • Preparation method for ZnO nanosphere with yolk-eggshell structure

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Embodiment Construction

[0036] The method of the present invention will be further described below by way of examples.

[0037] Prepare 500ml of a mixed aqueous solution of 10mM zinc nitrate, 5mM hexamethylenetetramine and 2.5mM tripotassium citrate, place it in a 90°C water bath for 20 minutes of isothermal reaction, and age it in air at room temperature (20-30°C) 8 hours. The reaction solution was centrifuged, and the white powder obtained was washed with distilled water for 3-6 times and dried in an oven at 60° C. for 12 hours to obtain egg yolk-eggshell structure zinc citrate microspheres. The X-ray diffraction spectrum of the product shows that the obtained product is mainly amorphous. 1566cm in the Fourier transform infrared spectrum -1 and 1408cm -1 The absorption bands at the wave number correspond to the antisymmetric stretching vibration and symmetric stretching vibration of carboxylic acid and (COO-), respectively. Compared with citric acid, the absorption band shifts to the low frequen...

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PUM

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Abstract

The invention discloses a preparation method for a ZnO nanosphere with a yolk-eggshell structure. The preparation method comprises the following steps of: preparing 500ml of mixed aqueous solution which contains 10mM of zinc nitrate, 5mM of hexamine and 2.5mM of tripotassium citrate; reacting the solution at the constant temperature of 75-95 DEG C for 20 minutes; aging at the temperature of 20-30 DEG C for 6-10 hours to obtain a precursor of a zinc citrate microsphere with a yolk-eggshell structure; calcining the citrate microsphere at the temperature of 500-800 DEG C for 2 hours; and naturally cooling to the room temperature to obtain the ZnO nanometer with the yolk-eggshell structure.

Description

technical field [0001] The invention relates to a method for preparing a zinc oxide nanometer material with a special structure, specifically, the invention relates to a method for preparing a ZnO nanometer sphere with an egg yolk-eggshell structure. Background technique [0002] ZnO nanostructures have excellent electrical, optical, photoelectric and piezoelectric properties, and are useful in photocatalysis [1] ,sensor [2] ,led [3] , field emission device [4] and solar cells [5] and other fields have shown a wide range of application value. Micro / nanomaterials with egg yolk-eggshell structure are of great interest in drug delivery systems due to their low density and large specific surface area. [6,7] ,catalyst [8,9] ,Lithium Ion Battery [10,11] and micro / nanoscale reactors [12-14] etc. have unique application prospects, so it is of great significance to effectively control the synthesis of ZnO nanospheres with egg yolk-eggshell structure. [0003] The template me...

Claims

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Application Information

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IPC IPC(8): C01G9/02B82Y40/00
Inventor 李建功谢清水史蓉蓉
Owner LANZHOU UNIVERSITY
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