Pulse laser-induced preparation method of zinc oxide nano-structure

A technology of zinc oxide nanometer and pulsed laser, which is applied in the direction of zinc oxide/zinc hydroxide, nanotechnology, nanotechnology, etc., can solve the problems of complex operation process, complicated preparation process, toxic and harmful organic additives, etc., and achieve simple preparation process, Easy adjustment of optical path and various shapes

Inactive Publication Date: 2014-03-19
JIANGSU UNIV
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Problems solved by technology

[0003]At present, the commonly used preparation methods of zinc oxide nanostructures mainly include chemical vapor deposition, hydrothermal method, continuous atomic layer adsorption reaction method, sol-gel method, electro Deposition method, thermal evaporation method, spray pyrolysis method, etc., but due to the complicated preparation process of these methods, the required preparation time is too long (several hours to tens of hours), and some also require toxic and harmful organic additives, often It brings a series of problems such as complex operation process, low preparation efficiency, and easy pollution of the environment. In addition, the controllability is not easy to guarantee when using these methods to prepare zinc oxide nanostructures, and the shape and size of the obtained products are uneven; In technology, there are two main methods for preparing zinc oxide nanostructures by laser-induced method: one is laser-induced decomposition method, that is, the laser irradiates the zinc-containing organic compound solution dropped on the substrate, and the laser is used as the energy source to make the solution Zinc-containing organic compounds are decomposed to form different zinc oxide nanostructures. For example, Fauteux mixed hydrated zinc acetylacetonate with deionized water and denatured ethanol, or mixed zinc acetate dihydrate with methanol, deionized water and monoethanolamine. solution, which were dropped on stainless steel or quartz substrates, and after being irradiated by the 10.6 μm wavelength laser output by the CO2 laser, ZnO nanorods,

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Examples

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Embodiment 1

[0027] Example 1: A nanosecond pulsed laser with a pulse width of 5-8 ns, a wavelength of 355 nm, an average power of 1.6 W, and a repetition rate of 10 Hz was used to irradiate the surface of the zinc sheet sample to prepare zinc oxide nanostructures; the pre-cleaned zinc sheet The sample was placed flat in a 5 mol / L hydrogen peroxide solution, and the upper surface of the sample was kept 1 mm away from the liquid surface of the solution; the laser was turned on so that the focal point of the laser beam after being focused by the focusing lens was located 0.1 mm below the upper surface of the sample, and the energy density of the laser was adjusted to Control at 0.5 J / cm 2 After that, let it directly irradiate on the surface of the zinc sheet sample, and keep the irradiation time for 30 s; remove the sample, blow off the debris on its surface, and then clean it later; figure 2 It is shown that the zinc oxide nanosheet structure is obtained, and the characteristic size (na...

Embodiment 2

[0028] Example 2: A nanosecond pulsed laser with a pulse width of 1–2 ns, a wavelength of 532 nm, an average power of 0.9 W, and a repetition rate of 1 kHz was used to irradiate the surface of the zinc sheet sample to prepare zinc oxide nanostructures; the pre-cleaned zinc sheet The sample was placed flat in 3 mol / L hydrogen peroxide solution, and the upper surface of the sample was kept 2 mm away from the liquid surface of the solution; the laser was turned on so that the focal point of the laser beam after being focused by the focusing lens was located 0.1 mm below the upper surface of the sample, and the energy density of the laser was adjusted to Control at 1 J / cm 2 Then make it directly irradiate on the surface of the zinc flake sample, and keep the irradiation time for 20 s; remove the sample, blow off the debris on its surface, and then clean it later; image 3 It is shown that the obtained flower-like structure is composed of ZnO nanoneedles, and the characteristic ...

Embodiment 3

[0029] Example 3: A femtosecond pulse laser with a pulse width of 130fs, a wavelength of 800nm, an average power of 2.5W, and a repetition rate of 1kHz was used to irradiate the surface of the zinc film material sample to prepare zinc oxide nanostructures; the pre-cleaned zinc film material sample was placed flat In 1 mol / L hydrogen peroxide solution, keep the upper surface of the sample at a distance of 2 mm from the liquid surface of the solution; turn on the laser so that the focal point of the laser beam after being focused by the focusing lens is located 0.5 mm below the upper surface of the sample, and control the energy density of the laser at 2 J / cm 2 Then it was directly irradiated on the surface of the zinc film material sample, and the irradiation time was maintained for 10 s. Remove the sample, blow off its surface debris and perform post-cleaning; Figure 4 It is shown that the zinc oxide nanorod structure is obtained, and the characteristic size (nanorod dia...

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Abstract

The invention relates to the technical field of micro-nano material preparation and laser micro-nano machining, and in particular relates to a pulse laser-induced preparation method of a zinc oxide nano-structure. The zinc oxide nano-structures in different morphologies are prepared by using ultra-short pulse laser to radiate the surface of the zinc-based material in hydrogen peroxide, the method is suitable for a zinc plate or zinc-plated materials adopting different substrates.

Description

technical field [0001] The invention relates to the technical field of micro-nano material preparation and laser micro-nano processing, in particular to a method for preparing zinc oxide nanostructures with different shapes by using ultrashort pulse laser to irradiate the surface of zinc-based materials placed in hydrogen peroxide water. It can be applied to zinc sheet or zinc film materials with different substrates. Background technique [0002] As a wide-bandgap semiconductor material (bandgap of 3.37 eV at room temperature), zinc oxide is widely used in solar cells, short-wave lasers, light-emitting diodes, ultraviolet shields, and gas sensors due to its unique optical, electrical, magnetic, mechanical and catalytic properties. , photocatalysts, etc. have broad application prospects; as we all know, the performance of zinc oxide depends on its structure and size, and its shape and size can be regulated by specific preparation processes, so the search for zinc oxide nanos...

Claims

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Application Information

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IPC IPC(8): C01G9/02B82Y40/00B82Y30/00
Inventor 李保家黄立静任乃飞周明
Owner JIANGSU UNIV
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