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Zinc oxide microspheres and preparation method thereof

A zinc oxide, microsphere technology, applied in the direction of zinc oxide/zinc hydroxide, nanotechnology, nanotechnology for materials and surface science, etc., to achieve strong controllability of morphology, easy operation, strong operability and The effect of practicality

Inactive Publication Date: 2014-10-29
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the method of preparing three-dimensional ZnO materials still needs to be developed, and the preparation of three-dimensional ZnO by simple, reproducible, and low-cost synthesis methods is still very challenging.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1.1 In 50 mL of deionized water, add 0.0025 mol of zinc nitrate and stir at room temperature for 20 min.

[0033] 1.2 Add 0.0075 mol of hexamethylenetetramine (HMT) to the solution described in 1.1, and stir at room temperature for 20 minutes to obtain a homogeneous solution.

[0034] 1.3 Add 0.0005 mol of surfactant tartaric acid to the solution described in 1.2, and stir at room temperature for 20 minutes to obtain a uniform solution.

[0035] 1.4 Transfer the solution described in 1.3 to a 100mL reactor, heat it in an oven to 150°C, and react for 6h. The sample after being cooled with the furnace is subjected to centrifugal washing to obtain wool-like zinc oxide microspheres (such as figure 2 shown). The structural characteristics of the obtained wool-like zinc oxide microspheres are uniform in size and about 4.5-6.5 μm in diameter.

[0036] figure 1 It is the X-ray diffraction pattern of the sample. It can be seen from the figure that the crystal form of the ob...

Embodiment 2

[0040] The preparation method is the same as in Example 1, except that the amount of hexamethylenetetramine is increased to 0.0125 mol. The obtained wool-like zinc oxide microspheres are similar to those in Example 1, with a diameter of 5-7.5 μm.

[0041] Figure 4 It is a low-magnification scanning electron microscope photo of the sample. It can be seen from the figure that the sample is composed of zinc oxide nanosheets, which are like wool balls, and there is a large hole in the center of some microspheres. The sample has many damages, and the size distribution is uniform. The diameter is 5-7.5 μm. It can be seen from the high-magnification scanning electron microscope photos that there are some small holes on the surface of the microspheres. According to the BET test, the specific surface area of ​​the obtained microspheres is 22.97m 2 / g.

Embodiment 3

[0043] The preparation method is the same as in Example 1, except that the amount of hexamethylenetetramine is reduced to 0.005 mol. The obtained wool-like zinc oxide microspheres have a diameter of 4.8-5.5 μm.

[0044] Figure 5 It is a scanning electron microscope photo of the sample. It can be seen from the figure that the sample is composed of zinc oxide nanoflakes, which are wool-like, uniform in size, with a diameter range of 4.8-5.5 μm, good crystallization, regular shape, and most of the microspheres There is no large hole in the center. The specific surface area of ​​the obtained microspheres was 21.47m after the BET test 2 / g.

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Abstract

The invention discloses yarn ball-like zinc oxide microspheres and a preparation method thereof. The grain size of the microspheres is 2-9mu m, the microspheres consist of zinc oxide thin sheets, and a part of the microspheres have a large hole in the center. The preparation method comprises the following steps: dissolving zinc salt in water to prepare a solution, then, adding hexamethylenetetramine, stirring at room temperature till the solution is clarified, and then adding tartaric acid and uniformly stirring to obtain a reaction solution; and transferring the solution to a reaction kettle, reacting at 120-180 DEG C to prepare zinc oxide; after reaction, carrying out centrifugal separation and washing to obtain the zinc oxide microspheres. The preparation method of the zinc oxide microspheres disclosed by the invention has the advantages that the needed materials are cheap, the preparation process is simple and convenient to operate, the reaction temperature is low and the reaction time is short. The prepared product is regular in shape, has large specific surface area, strong morphologic controllability, good stability and repeatability and strong operability and practicality and has a potential application value and strong practicality in the field of photocatalytic performance, gas sensitivity and the like.

Description

technical field [0001] The invention relates to a zinc oxide microsphere and a preparation method thereof, in particular to a zinc oxide microsphere with a special wool-like shape synthesized by a hydrothermal method, and belongs to the technical field of zinc oxide materials. Background technique [0002] Zinc oxide is a semiconductor material with a wide band gap (3.37eV) and high exciton binding energy (60eV). It has unique electrical, optoelectronic, and magnetic properties, and has great potential in optoelectronic materials and devices. A wide range of applications, and these applications mainly rely on the morphology of ZnO. Therefore, in recent years, the preparation and properties of ZnO with different morphologies have attracted much attention. There are many methods for ZnO morphology control, such as surfactant covering method, soft and hard template method, self-assembly method, spin nanoribbon or nanosheet method. At present, one-dimensional ZnO nanostructure...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G9/02B82Y30/00B82Y40/00
Inventor 师瑞霞杨萍宋雪玲董晓斌贾长超
Owner UNIV OF JINAN
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