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Method for preparing zinc oxide/zinc stannate core-shell structure heterojunction

A technology of core-shell structure and zinc stannate, which is applied in the direction of zinc oxide/zinc hydroxide, chemical instruments and methods, tin compounds, etc., can solve problems that have not been seen before, and achieve broadened detection range, uniform shape and size, and product pure effect

Active Publication Date: 2018-08-14
NANJING UNIV OF SCI & TECH
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  • Application Information

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Problems solved by technology

However, a method combining liquid-phase laser ablation, atomic layer deposition, and solvothermal has not yet been seen to prepare a zinc oxide / zinc stannate core-shell heterojunction that can be applied to weavable and wearable flexible ultraviolet light detection.

Method used

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  • Method for preparing zinc oxide/zinc stannate core-shell structure heterojunction
  • Method for preparing zinc oxide/zinc stannate core-shell structure heterojunction
  • Method for preparing zinc oxide/zinc stannate core-shell structure heterojunction

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preparation example Construction

[0025] In conjunction with accompanying drawing, a kind of preparation method of zinc oxide / zinc stannate core-shell structure heterojunction of the present invention comprises the following steps:

[0026] Step 1. Ultrasonic cleaning and drying of flexible fibrous thin metal wires with deionized water and absolute ethanol respectively; the metal wires include titanium wires or zinc wires with a diameter of 0.1-1 mm.

[0027] Step 2. Deposit a zinc oxide film on the surface of the metal wire as a seed layer by atomic layer deposition; the zinc oxide film thickness of the atomic layer deposition is 50-200nm.

[0028] Step 3, using a solvothermal method to grow zinc oxide nanorod arrays in a vertical direction on the surface of the seed layer; the hydrothermal temperature set by the solvothermal method is 90-120° C., and the hydrothermal time is 4-8 hours.

[0029] Step 4. Add the prepared solution into the reaction vessel, place the tin source target in the solution, and soak t...

Embodiment 1

[0046] A combination of atomic layer deposition, liquid phase laser ablation and solvothermal method is used to synthesize ZnO nanorod arrays with uniform shape and size through atomic layer deposition and solvothermal method; Tin target, to obtain a highly active solvothermal precursor; and then through a solvothermal method based on a zinc oxide array, a ZnO / Zn with uniform size and shape was synthesized under milder conditions. 2 SnO 4 The core-shell structure heterojunction, the specific steps are as follows:

[0047] Step 1. Take a zinc wire with a diameter of 0.5 mm, ultrasonically clean it with deionized water and absolute ethanol for 30 minutes and dry it, and then use atomic layer deposition technology to deposit a zinc oxide film with a thickness of 50 nm on the surface of the metal zinc wire. After that, ZnO nanorod arrays were grown on the surface along the vertical direction by solvothermal method, the hydrothermal temperature was set at 90°C, and the hydrotherma...

Embodiment 2

[0056] A combination of atomic layer deposition, liquid phase laser ablation and solvothermal method is used to synthesize ZnO nanorod arrays with uniform shape and size through atomic layer deposition and solvothermal method; Tin target, to obtain a highly active solvothermal precursor; and then through a solvothermal method based on a zinc oxide array, a ZnO / Zn with uniform size and shape was synthesized under milder conditions. 2 SnO 4 The core-shell structure heterojunction, the specific steps are as follows:

[0057] Step 1. Take a titanium wire with a diameter of 0.1 mm, ultrasonically clean it with deionized water and absolute ethanol for 30 minutes and dry it, and then deposit a zinc oxide film with a thickness of 150 nm on the surface of the metal titanium wire by atomic layer deposition technology. After that, ZnO nanorod arrays were grown on the surface along the vertical direction by solvothermal method, the hydrothermal temperature was set at 95°C, and the hydrot...

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Abstract

The invention discloses a method for preparing a zinc oxide / zinc stannate core-shell structure heterojunction. The method comprises the following steps: adopting a method of combination of atomic layer deposition, liquid phase laser ablation and solvothermal method and using a flexible fibrous fine metal wire as a base to vertically grow a zinc oxide nanorod array on the surface of the base, thenablating a high-purity metal tin target immersed in a solution by laser to obtain a highly active solvothermal precursor, and further growing a zinc oxide / zinc stannate core-shell structure heterojunction on the zinc oxide array by the solvothermal method. The method adopted by the invention has the advantages of simple operation, mild reaction condition, high purity, no impurity element, no surfactant addition and the like, and the prepared zinc oxide / zinc stannate core-shell structure heterojunction has uniform morphology and size and good crystallinity. The zinc oxide / zinc stannate core-shell structure heterojunction prepared by the invention can be applied to a flexible fibrous ultraviolet photodetector.

Description

technical field [0001] The invention relates to the technical field of preparing metal oxide semiconductor nanometer materials, in particular to a method for preparing a zinc oxide / zinc stannate core-shell structure heterojunction. Background technique [0002] Ultraviolet light detection has attracted extensive research and application in stratospheric ozone monitoring, flame protection, fire protection and optical communication. The flexible fiber-shaped ultraviolet photodetector has the characteristics of flexibility, 360-degree detection, weaving and wearable, so it can realize the detection of ultraviolet light while wearing on the human body, and has a wider application range than the planar detector. At present, zinc oxide is the main material for the preparation of flexible fiber-shaped ultraviolet photodetectors. As a binary metal oxide, zinc oxide has insufficient band gap (about 3.37eV) to detect shorter wavelength ultraviolet light. Compared with binary metal o...

Claims

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Application Information

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IPC IPC(8): C01G9/02C01G19/00
CPCC01G9/02C01G19/00C01P2002/72C01P2004/03C01P2004/16C01P2004/62C01P2004/80C01P2006/80
Inventor 邹友生刘舒婷曾海波刘佳欣朱正峰
Owner NANJING UNIV OF SCI & TECH
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