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Method for preparing ellipsoid-shaped zinc oxide

A technology of zinc oxide and ellipsoid, which is applied in the field of metal oxide preparation, can solve the problems of unsuitability for large-scale industrial production, complex preparation process, and long process, and achieves suitable for large-scale production, good dispersion, and equipment simple effect

Inactive Publication Date: 2009-12-30
LIAOCHENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the above methods have prepared ellipsoidal zinc oxide, the preparation process is complicated, the cost is high, and the process is too long, so it is not suitable for large-scale industrial production.

Method used

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  • Method for preparing ellipsoid-shaped zinc oxide
  • Method for preparing ellipsoid-shaped zinc oxide
  • Method for preparing ellipsoid-shaped zinc oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] First prepare solution A: 1.19g Zn(NO 3 ) 2 .6H 2 O was dissolved in 80ml of deionized water, stirred at 500 rpm until completely dissolved; at the same time, prepared solution B: 5M concentrated ammonia solution; heated solution A to 90°C, and then added solution B dropwise to In solution A, until pH = 8, a white precipitate was obtained; the white precipitate was washed three times with deionized water and absolute ethanol, and finally vacuum-dried at 70° C. for 2 hours.

[0025] Fig. 1 is the photomicrograph and X-ray diffraction (XRD) pattern of the ellipsoidal zinc oxide prepared in this embodiment. It can be seen from Figure 1 (a) and (b) that the average size of the long axis of the zinc oxide ellipsoid is 800nm, and the average size of the short axis is 480nm, with good dispersion and no agglomeration. It can be seen from Figure 1(c) that all the diffraction peaks are those of ZnO, and no other impurity peaks appear, indicating that the synthesized ZnO has no...

Embodiment 2

[0027] First prepare solution A: 0.89g Zn(NO 3 ) 2 .6H 2 O was dissolved in 80ml of deionized water, stirred at 500 rpm until completely dissolved; at the same time, prepared solution B: 5M triethanolamine solution; heated solution A to 70°C, and then added solution B dropwise to In solution A, until pH = 7, a white precipitate was obtained; the white precipitate was washed three times with deionized water and absolute ethanol, and finally dried under vacuum at 60° C. for 2 hours.

[0028] figure 2 The morphology photo of the ellipsoidal zinc oxide prepared for this example, it can be seen from the figure that the average size of the long axis of the zinc oxide ellipsoid is 1410nm, the average size of the short axis is 1220nm, the dispersibility is good, and there is no agglomeration.

[0029] image 3 From the EDS energy spectrum of the ellipsoidal zinc oxide prepared for this example, it can be seen that there are no energy spectrum peaks of other elements except Zn and ...

Embodiment 3

[0031] A method for preparing ellipsoidal zinc oxide by a liquid phase method, comprising the steps of:

[0032] (1) Prepare solution A: dissolve a certain amount of zinc oxalate in deionized water, dissolve it under stirring at a speed of 30 rpm, until it is completely transparent, so that a solution A with a concentration of 0.001 is obtained;

[0033] (2) Prepare solution B: dissolve ammonia water in a certain amount of deionized water, and dissolve it under stirring at a speed of 30 rpm, so that a solution B with a concentration of 0.001M is obtained;

[0034] (3) Heat 0.001 M solution A to 50°C, and add 0.001 M solution B dropwise to solution A under stirring at a speed of 30 rpm until pH = 6, and a white precipitate is obtained;

[0035] (4) Wash the white precipitate obtained in step (3) with deionized water first, then with absolute ethanol, and repeat the washing twice; finally, dry under normal pressure at 60°C for 2 hours to prepare get the product.

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Abstract

The invention provides a method for preparing ellipsoid-shaped zinc oxide. The method comprises the following steps of: dissolving a certain amount of zinc slat in water, and stirring the mixed solution until the mixed solution is clear; heating the mixed solution up to between 50 and 100 DEG C, dripping an alkali solution into the mixed solution when the mixed solution is stirred until the pH value of the mixing solution is between 6 and 14, and obtaining a white precipitate; filtering, washing and drying the white precipitate to obtain the finished product. The method has the advantages that: (1) only two raw materials are needed in the whole preparation process, other reaction raw materials are unnecessarily added, and the chance of introducing impurities is lowered, so that the purity of products is not affected; (2) the whole preparation process is mild, the conditions of high temperature, special atmosphere protection and ultrasonic and microwave assistance are not needed, so that the needed equipment is simple, the reaction speed is fast, and the method is more suitable for mass production; and (3) the prepared ellipsoid-shaped zinc oxide has uniform size and good dispersity. By adjusting concentrations of the raw materials, the ellipsoid-shaped zinc oxide of which the sizes of the long shaft and the short shaft are between 50 and 1,000nm can be obtained.

Description

technical field [0001] The invention relates to a method for preparing a metal oxide with an ellipsoidal shape, and mainly relates to a method for preparing an ellipsoidal zinc oxide. Background technique [0002] ZnO is a new type of II-VI wide bandgap compound semiconductor material, which has similar lattice constant and bandgap width to GaN, and compared with GaN, ZnO has higher melting point and exciton binding energy and good electromechanical properties. Coupling and lower electron-induced defects. These excellent properties of ZnO make it have broad application prospects in coatings, photocatalysis, solar cells, ultraviolet detectors, LEDs and many other fields. [0003] In recent years, a large number of studies have focused on the preparation of ZnO particles with different shapes and structures, such as nanowires, nanorods, nanotubes, nanosheets, spiny balls, and quadrangles. Although there are a small number of reports on the research on ellipsoidal zinc oxide,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G9/02
Inventor 蒲锡鹏张大凤邵鑫贾丽萍
Owner LIAOCHENG UNIV
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