A kind of preparation method of dendritic hollow zinc oxide nanorod array

A technology of zinc oxide nanorods and nanorod arrays, which is applied in the field of materials science and engineering, can solve the problems of inability to effectively control the morphology of dendritic zinc oxide nanorod arrays, high reaction temperature, and limited development, so as to improve the repeatability of experiments , Simplify the experimental steps, the effect of uniform shape

Active Publication Date: 2021-03-16
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the three-step method has been widely used, there are still some serious defects in this method that limit its development.
For example, the three-step method requires a higher reaction temperature and requires the use of organic additives during the synthesis. Due to the multi-step synthesis, the repeatability is poor. The most important thing is that the three-step method cannot effectively control the morphology of the dendritic ZnO nanorod array.

Method used

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  • A kind of preparation method of dendritic hollow zinc oxide nanorod array
  • A kind of preparation method of dendritic hollow zinc oxide nanorod array
  • A kind of preparation method of dendritic hollow zinc oxide nanorod array

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preparation example Construction

[0036] A method for preparing a dendritic hollow zinc oxide nanorod array, comprising the steps of:

[0037] 1) Surface treatment of the zinc flakes: Mechanically polish or electrochemically polish one side of the zinc flakes to obtain a zinc flake with a smooth surface on one side, and place the zinc flakes with the polished side up in acetone, absolute ethanol, deionized Ultrasonic cleaning is carried out in water in turn, and it is taken out and dried for use;

[0038] 2) Hot molding: the smooth surface of the polished zinc sheet in step 1 is stacked with the commercial double-pass porous anodized aluminum template, and then placed in the mold for fixing. Heat the mold to a temperature higher than the recrystallization temperature of zinc, and keep it for a period of time, so that the temperature of the template and the zinc sheet are consistent, and then apply a certain pressure, which should be greater than the yield strength of zinc at this temperature, and under this te...

Embodiment 1

[0050] Fabrication of zinc nanorod arrays with diameters of 50–400 nm by thermocompression molding:

[0051] Cut the zinc flakes into discs with a diameter of 5 mm by a punching machine, mechanically polish the zinc flakes with a diameter of 5 mm, and then perform ultrasonic cleaning repeatedly in acetone, absolute ethanol, and deionized water respectively, take them out and dry them for use.

[0052] The double-pass porous anodized alumina prepared by the secondary oxidation method is used as a template, the aperture of the template is 50-400nm, the hole depth is 60μm, and the template is a nanoporous ordered array with uniform distribution of holes.

[0053] Place the lower steel mold 8 on the lower indenter 9 of the universal testing machine, the limiting sleeve 3 and the lower steel mold 8 are positioned and fixed through the central cylinder and hole of the lower steel mold 8, and then put the lower pad 7 into the limiting sleeve In the small hole, place the zinc sheet 6 ...

Embodiment 2

[0056] Zinc nanorod arrays with a diameter of 200 nm and different lengths were fabricated by compression molding:

[0057] Cut the zinc flakes into discs with a diameter of 5 mm by a punching machine, mechanically polish the zinc flakes with a diameter of 5 mm, and then perform ultrasonic cleaning repeatedly in acetone, absolute ethanol, and deionized water respectively, take them out and dry them for use.

[0058] Double-pass porous anodized aluminum prepared by a secondary oxidation method is used as a template, and the template is a nanoporous ordered array with a pore diameter of 50-400nm, a pore depth of 60μm, and uniform distribution of pores.

[0059] Place the lower steel mold 8 on the lower indenter 9 of the universal testing machine, the limiting sleeve 3 and the lower steel mold 8 are positioned and fixed through the central cylinder and hole of the lower steel mold 8, and then put the lower pad 7 into the limiting sleeve In the small hole, place the zinc sheet 6 o...

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Abstract

The invention discloses a preparation method of a dendritic hollow zinc oxide nanorod array, and belongs to the technical field of material science and engineering. The method comprises the followingsteps: carrying out surface treatment on a zinc sheet; performing compression molding; conducting unloading; performing demolding; and standing in an alkaline solution. According to the method, high-temperature and high-pressure conditions of a traditional hydrothermal method are not needed, meanwhile, use of any organic additive is avoided, and in addition, an additional zinc source is not introduced in the synthesis process. According to the method, the dendritic hollow zinc oxide nanorod array with good crystallinity and controllable morphology is prepared by utilizing a soaking method under the conditions of low temperature and normal pressure. The method has the advantages of simplicity in operation, low cost, environmental friendliness and the like, is expected to realize large-scalecontrollable preparation of the dendritic hollow zinc oxide nanorod array, and has important and profound significance for revealing the growth principle of zinc oxide and promoting the practical application of zinc oxide.

Description

technical field [0001] The invention belongs to the technical field of material science and engineering, and in particular relates to a method for preparing a dendritic hollow zinc oxide nanorod array. Background technique [0002] Zinc oxide is a kind of direct bandgap semiconductor material. At room temperature, its forbidden band is 3.37eV, and the exciton binding energy is 60meV; the mobility of electrons in zinc oxide is 2-3 orders of magnitude higher than that in titanium dioxide; due to its crystal The structure lacks symmetry, and zinc oxide also has piezoelectric properties. Thanks to a series of unique physical and chemical properties of zinc oxide, zinc oxide can be used in electronics, optoelectronics, electrochemistry, electromechanical and other fields. Another unique advantage of zinc oxide lies in the diversity of its nanostructures. Among the numerous zinc oxide nanostructures, the one-dimensional zinc oxide nanorod array has good structural stability, larg...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G9/02B82Y40/00
CPCB82Y40/00C01G9/02C01P2004/16
Inventor 邵洋赵威
Owner TSINGHUA UNIV
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