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Preparation method of hexagonal prism zinc oxide

A technology of zinc oxide and prisms, which is applied in the technical field of asymmetric growth of zinc oxide crystals and in the field of zinc oxide synthesis of controllable crystal planes, can solve problems such as difficult ratio regulation, achieve smooth surface, and realize controllable synthesis technology Effect

Inactive Publication Date: 2019-07-09
EAST CHINA UNIV OF SCI & TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, due to the crystal symmetry, ZnO tends to grow symmetrically, and it is difficult to effectively control the ratio of (001) and (001) crystal planes of ZnO.

Method used

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  • Preparation method of hexagonal prism zinc oxide
  • Preparation method of hexagonal prism zinc oxide
  • Preparation method of hexagonal prism zinc oxide

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preparation example Construction

[0022] The invention provides a method for preparing asymmetrically grown zinc oxide crystals. The specific process includes the following steps: 1) preparing a certain volume fraction of ethylene glycol mixed solution, adding zinc acetate and urotropine in sequence after ultrasonic dispersion, and ultrasonically dissolving ; 2) Put the above mixed solution in an oven to react at high temperature for a period of time, wash and filter with ethanol, and dry; 3) Finally, calcinate the obtained powder at high temperature.

[0023] In order to obtain hexagonal zinc oxide with different surface morphology, the volume fraction and concentration of the mixed solution were adjusted, and the reaction temperature and time were adjusted at the same time. The experimental results were compared to obtain the zinc oxide crystal plane under different parameters.

Embodiment 1

[0025] 1) Preparation of mixed solution

[0026] Accurately weigh 16ml of ethylene glycol and 24ml of deionized water, and after ultrasonic mixing, add 5.268 g of zinc acetate and 3.364 g of urotropine in sequence, and ultrasonically dissolve.

[0027] 2) Hydrothermal reaction

[0028] The above mixed solution was transferred to a 100ml hydrothermal kettle, then placed in an oven at 95°C for 24 hours, and then taken out after natural cooling.

[0029] 3) high temperature calcination

[0030] The above product was washed and filtered three times with ethanol, then dried at 80° C., and finally, the obtained powder was calcined in a muffle furnace at 300° C. for 2 h. The SEM picture of the resulting product is as figure 1 As shown, the XRD pattern is as figure 2 shown.

[0031] Observed figure 1 It can be obtained that the product zinc oxide is in the shape of a hexagonal prism, the upper and lower bottom surfaces are of different sizes, and the sides are not simple symmet...

Embodiment 2

[0033] 1) Preparation of mixed solution

[0034] Accurately weigh 24ml of ethylene glycol and 24ml of deionized water, add 5.268g of zinc acetate and 3.364g of urotropine in sequence after ultrasonic mixing, and ultrasonically dissolve.

[0035] 2) Hydrothermal reaction

[0036] The above mixed solution was transferred to a 100ml hydrothermal kettle, then placed in an oven at 95°C for 24 hours, and then taken out after natural cooling.

[0037] 3) high temperature calcination

[0038] The above product was washed and filtered three times with ethanol, then dried at 80° C., and finally, the obtained powder was calcined in a muffle furnace at 300° C. for 2 hours. The SEM picture of the resulting product is as image 3 As shown, the XRD pattern is as Figure 4 shown.

[0039] Observed image 3 It can be obtained that the product zinc oxide is still in the form of a hexagonal prism, and the ratio of the upper and lower bottom surfaces is obviously smaller than that of Case 1...

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Abstract

The invention discloses a preparation method of hexagonal prism zinc oxide. The preparation process of the method comprises the following steps: (1) taking a certain volume of deionized water and an ethylene glycol solution, and performing ultrasonic dispersion so as to obtain a mixed solution; (2) adding a zinc oxide precursor and a morphology control agent sequentially to the mixed solution, andperforming ultrasonic dissolution; (3) transferring the mixed solution to a hydrothermal kettle, and performing a reaction at high temperature for a period of time; (4) performing suction filtration,performing washing with ethanol, and performing drying at a high temperature; and (5) performing high-temperature calcination on the dried product finally. It can be seen through comparison with zincoxide X-ray diffraction standard cards that the product is a hexagonal crystal zinc oxide crystal, and at the same time, it can be clearly seen from field emission scanning electron micrographs thatthe product is of a hexagonal prism. The preparation method has the advantages that 1, hexagonal crystal prism zinc oxide particles with asymmetric morphology are obtained, 2, the zinc oxide crystal exposes different crystal faces, and the controllable crystal plane is key to application of zinc oxide.

Description

technical field [0001] The invention relates to the technical field of asymmetric growth of zinc oxide crystals and the field of zinc oxide synthesis with controllable crystal planes, in particular to a preparation method of hexagonal prism zinc oxide. Background technique [0002] Zinc oxide has been widely used due to its unique properties, such as: photocatalysis, as a vulcanization activator in the rubber industry, gas sensors, solar cells, photovoltaics and piezoelectric fields. Zinc oxide exposed to different crystal planes corresponds to different application fields. Therefore, many scholars have carried out a large amount of research on the synthesis of zinc oxide with different crystal planes, among which Pu Xian Gao et al. Nanocrystals) synthesize zinc oxide particles with various shapes by high-temperature calcination, such as sheet-like, ribbon-like, short-rod-like, needle-like, etc. Eue Soon Jang et al. successfully prepared short rod-shaped and flake-shaped zi...

Claims

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Application Information

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IPC IPC(8): C01G9/02
CPCC01G9/02C01P2004/30
Inventor 姜海波李春忠吴王超崔健周梅芳
Owner EAST CHINA UNIV OF SCI & TECH
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