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A preparation method of zinc oxide@zinc microspheres

A technology of zinc oxide and microspheres, applied in the direction of nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, can solve high-demand problems, achieve the effect of avoiding direct action, eliminating the preparation process, and being easy to control

Active Publication Date: 2019-10-11
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the liquid phase ablation method has high requirements for experiments, and there are certain safety hazards

Method used

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  • A preparation method of zinc oxide@zinc microspheres
  • A preparation method of zinc oxide@zinc microspheres
  • A preparation method of zinc oxide@zinc microspheres

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Experimental program
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preparation example Construction

[0023] A method for preparing zinc oxide@zinc microspheres of the present invention uses a pulsed laser deposition system to prepare zinc oxide@zinc microspheres in one step through laser ablation technology. Such as figure 1 , the pulsed laser deposition system includes a pulsed laser 1, a lens 2, a metal zinc target 3, a stage 4 and a substrate 5, the target is directly ablated by laser in the air, and the metal target is ablated due to the high energy of the laser , will generate metal plasma, and then agglomerate and oxidize in the liquid environment on the substrate, and finally form zinc oxide@zinc composite microspheres on the substrate.

[0024] The prepared zinc oxide@zinc microspheres are composite microspheres with a core-shell structure in which zinc oxide microsphere shells wrap zinc particles, and have a spherical shape with a smooth surface; The spherical shell walls have nanometer dimensions.

Embodiment 1

[0026] Turn on the pulse laser 1, adjust the position of the lens 2, and focus the laser beam on the surface of the zinc target 3; then place the substrate silicon wafer at a position 5 mm away from the target in the horizontal direction and 1 cm away from the laser focus point in the longitudinal direction. Drop a few drops of deionized water on the wafer until the substrate is evenly covered; adjust the laser output power to 150mW, and the ablation time to 2min; place the silicon wafer at 60°C to dry, as figure 2 , ZnO@Zn composite microspheres were grown on the silicon wafer, but due to the low laser output power, the morphology of ZnO@Zn microspheres was irregular, and no smooth and regular composite particles were formed.

Embodiment 2

[0028] Turn on the pulse laser 1, adjust the position of the lens 2, and focus the laser beam on the surface of the zinc target 3; then place the substrate silicon wafer at a position 5 mm away from the target in the horizontal direction and 1 cm away from the laser focus point in the longitudinal direction. Add a few drops of deionized water on the wafer until the substrate is covered; adjust the laser output power to 210mW, and ablation time to 5min; dry the silicon wafer at 60°C to obtain zinc oxide@zinc microspheres. structured as image 3 , it can be seen that the zinc oxide@zinc microspheres are hollow core-shell composite microspheres in which zinc oxide microsphere shells wrap zinc particles, and have a spherical shape with a smooth surface and a diameter of about 3 μm.

[0029] The laser performance of the prepared zinc oxide@zinc microspheres was tested, and the obtained laser spectrum was as follows: Figure 4 , it can be seen that the ZnO@Zn microspheres have obvi...

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Abstract

The invention discloses a preparation method of zinc oxide@zinc micro-spheres. The micro-spheres are prepared by the aid of a laser ablation technique. The preparation method includes the steps: 1) starting a laser, adjusting the position of a lens and focusing laser beams on the surfaces of zinc target materials; 2) dripping solution on substrates until the substrates are completely laid; 3) adjusting output power of the laser to reach 150-300mW, and ablating the zinc target materials for 2-10min in normal-temperature air; 4) drying the substrates at the temperature of 60 DEG C under vacuum to obtain the zinc oxide@zinc micro-spheres on the substrates. The method is simple and easy to operate, the requirement of laser ablation in the air for experimental conditions are reduced, the zinc oxide@zinc micro-spheres with core-shell structures can be prepared in indoor-temperature air environments, and the prepared zinc oxide@zinc micro-spheres have micro-scale diameters, spherical shapes with smooth surfaces and obvious laser characteristics.

Description

technical field [0001] The invention relates to a method for preparing zinc oxide@zinc microspheres, in particular to a method for preparing zinc oxide@zinc microspheres in one step, which belongs to the field of composite material nanoparticle preparation. Background technique [0002] Semiconductor oxide@metal composite nanoparticles have unique optical, photocatalytic and electrical properties due to the special nanostructure of non-bare metal nonmetal oxides, which has attracted many researchers to study and strive to improve their catalytic, sensing and Features such as adjustable luminescence. The physical and chemical properties of this structure are tunable and its properties depend on changes in the thickness of the shell. Significant changes in light emission and absorption have been demonstrated through changes in core diameter and shell thickness. [0003] Zinc is a common and cheap metal material, and its oxidation product is a good direct wide bandgap semicon...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/12B82Y30/00B82Y40/00
Inventor 徐春祥王潇璇石增良
Owner SOUTHEAST UNIV
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