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Zinc oxide hollow micro ball and preparation method thereof

A zinc oxide and hollow technology is applied in the field of zinc oxide hollow microspheres and their preparation, and achieves the effects of simple process, no post-treatment and low cost.

Active Publication Date: 2013-12-04
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although ZnO nanomaterials with various morphologies have been widely reported, the synthesis of 3D structures of ZnO remains a great challenge.

Method used

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  • Zinc oxide hollow micro ball and preparation method thereof
  • Zinc oxide hollow micro ball and preparation method thereof
  • Zinc oxide hollow micro ball and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 1) Dissolve 1 g of zinc acetate dihydrate in 30 ml of ethanol, then add 0.5 ml of formic acid, stir until uniform to obtain a suspension.

[0017] 2) Transfer the suspension to a solvothermal device, perform a solvothermal reaction at 150 °C for 6 h, then centrifuge the obtained material, and then dry it at 80 °C to obtain zinc oxide hollow microspheres.

[0018] The X-ray diffraction pattern of the prepared zinc oxide hollow microspheres is shown in Figure 1, and its diffraction peaks are consistent with the standard pattern of hexagonal wurtzite phase zinc oxide, indicating that the obtained product is wurtzite zinc oxide. Scanning electron micrographs of ZnO hollow microspheres (see figure 2 ), it can be seen that the crystals of the outer layer of zinc oxide microspheres have hexagonal structure characteristics.

Embodiment 2

[0020] 1) Dissolve 1 g of zinc acetate dihydrate in 30 ml of methanol, then add 0.5 ml of formic acid, stir until uniform to obtain a suspension.

[0021] 2) Transfer the suspension to a solvothermal device, perform a solvothermal reaction at 150 °C for 6 h, then centrifuge the obtained material, and then dry it at 80 °C to obtain zinc oxide hollow microspheres.

Embodiment 3

[0023] 1) Dissolve 1 g of zinc acetate dihydrate in 30 ml of ethanol, then add 0.5 ml of formic acid, stir until uniform to obtain a suspension.

[0024] 2) Transfer the suspension to a solvothermal device, perform a solvothermal reaction at 170 °C for 36 h, then centrifuge the obtained material, and then dry it at 80 °C to obtain zinc oxide hollow microspheres.

[0025] The transmission electron micrographs of the prepared ZnO hollow microspheres are shown in Figure 3. It can be seen from the figure that the zinc oxide hollow microspheres are composed of two different sizes of zinc oxide crystals. The particle size of the inner layer of zinc oxide crystals is 100 nm, and the particle size of the outer layer of zinc oxide crystals with hexagonal structure characteristics is 600 nm. nm.

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Abstract

The invention discloses a zinc oxide hollow micro ball which is of a double-layer structure. An inner layer of the zinc oxide hollow micro ball is made of zinc oxide crystals with the diameter of 100nm and an outer layer is composed of zinc oxide crystals of hexagonal structures, and the zinc oxide crystals have the diameter of 500nm to 800nm. The diameter of the zinc oxide hollow micro ball ranges from 4 microns to 12 microns. The zinc oxide hollow micro ball is manufactured by a solvothermal method. Firstly, zinc acetate dihydrate is dissolved into an organic solvent, formic acid is added to obtain turbid liquid, the turbid liquid is transferred to a solvothermal device, and undergoes the solvothermal reaction, and obtained product is centrifuged and dried. The zinc oxide hollow micro ball has the advantages that the technology is simple, the cost is low, and post-processing is not needed, the grain diameter of the zinc oxide hollow micro ball is adjustable, the crystallinity is good, and massive synthesis is easy to perform.

Description

technical field [0001] The invention relates to a zinc oxide hollow microsphere and a preparation method thereof. Background technique [0002] Zinc oxide is a wide-bandgap semiconductor with an excitonic activation energy of 60 meV at room temperature. It is widely used in photocatalysis, solar cells, photoelectric functional devices, chemical sensors, drug delivery and other fields. The morphology of zinc oxide has a great influence on its performance. Although ZnO nanomaterials with various morphologies have been widely reported, the synthesis of 3D ZnO structures is still a great challenge. As a special three-dimensional structure, hollow spheres have many advantages, such as adjustable refractive index, low density, large catalytic active area, etc. At present, obtaining ZnO double-layer hollow microspheres usually requires a multi-step process, so it is necessary to develop a simple synthesis method for ZnO hollow spheres. [0003] The "one-pot" synthesis method has...

Claims

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Application Information

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IPC IPC(8): B01J13/02C01G9/02
Inventor 赵高凌何凯韩高荣
Owner ZHEJIANG UNIV
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