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Preparation method of ZnO nano-structure with petal effect

A technology of petal effect and nanostructure, applied in the field of nanomaterials, can solve problems such as strong adhesion, complicated preparation process, and indistinct surface petal effect, and achieve strong adhesion and good hydrophobicity

Inactive Publication Date: 2016-01-27
HEFEI NORMAL UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art that the petal effect on the surface of zinc oxide nanomaterials is not obvious, the preparation process is too complicated, and expensive experimental drugs are needed, and to provide a method for preparing a zinc oxide nanostructure with obvious petal effect. The contact angle is as high as 156°, showing super-hydrophobic properties; and when the water drop is inverted, it is still adsorbed on the surface, and the adhesion is extremely strong

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  • Preparation method of ZnO nano-structure with petal effect

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preparation example Construction

[0022] A preparation method of a zinc oxide nanostructure with petal effect, comprising the following steps:

[0023] 1. Preparation of zinc salt sol:

[0024] Add zinc acetate to ethylene glycol methyl ether to obtain a zinc acetate solution, add ethanolamine stabilizer to the zinc acetate solution, heat and stir in a water bath at 60°C for 2 hours, and age for 24 hours to obtain a colorless transparent sol.

[0025] 2. Preparation of Zinc Oxide Seed Crystal:

[0026] A glass slide was selected as the film growth substrate, ultrasonically cleaned in acetone and deionized water for 10 min, dried at 60°C, and set aside.

[0027] The spin coating method is used for coating. The sol is dripped onto the substrate at a low speed of 1500rpm, and the sol is uniformed at a high speed of 3000rpm. The time for 30s is to form a wet film, and then the wet film is pretreated. The temperature and time are respectively 150°C and 10min; repeat the above coating and pretreatment steps once o...

Embodiment 1

[0031] 1. Dissolve 8.78g of zinc acetate in 80ml of ethylene glycol methyl ether to obtain a zinc acetate solution with a concentration of 0.5mol / L, add 2.4mL of ethanolamine to the solution as a stabilizer, and heat and stir the solution in a water bath at 60°C for 2 hours. After aging for 24 hours, a colorless transparent sol was obtained.

[0032] 2. Use the spin coating method for coating, drop the transparent sol prepared in step 1 on the substrate at a low speed of 1500rpm, and uniform the glue at a high speed of 3000rpm. The time for uniform glue is 30s to form a wet film. For treatment, the temperature and time are 150°C and 10min, respectively; repeat the above coating and pretreatment steps once on the coated and pretreated substrate; finally put it into a high-temperature tube furnace for annealing treatment, the temperature is 500°C, and keep warm for 60min After natural cooling, zinc oxide seed crystals are obtained.

[0033] 3. Dissolve 0.238g of zinc nitrate he...

Embodiment 2

[0040] The preparation method of the zinc oxide seed crystal is as described in Example 1.

[0041] Dissolve 0.238g of zinc nitrate hexahydrate and 0.112g of hexamethylenetetramine in 38.8mL of deionized water, and add 1.2mL of ammonia water to adjust the pH value of the solution to 10.90, place the mixed solution in an autoclave, and then prepare The substrate with the zinc oxide seed layer is immersed in the mixed solution face down, hydrothermally reacted at 95°C for 2 hours, cooled naturally, washed with deionized water, dried at 80°C, and then placed in the atmosphere for a period of time. ZnO nanostructures with petal effect were obtained.

[0042] The zinc oxide nanostructure prepared in Example 2 consists of a large number of pointed zinc oxide nanorods of different thicknesses growing along the direction perpendicular to the surface of the substrate. The gaps between the nanorods are small and the distribution is relatively dense. The structure also has petals effect...

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Abstract

The invention discloses a preparation method of a ZnO nano-structure with a petal effect. The preparation method comprises the following steps of: respectively using zinc acetate, ethylene glycol monomethyl ether and ethanol amine as a precursor, a solvent and a stabilizer, carrying out coating by adopting a rotary coating technology and carrying out annealing processing to obtain zinc oxide seed crystals; then placing the prepared zinc oxide seed crystals into aqueous solution of zinc nitrate, regulating a pH value of solution by using ammonia water, and performing the hydrothermal reaction in an autoclave to obtain a great number of randomly growing zinc oxide nanorods, wherein the surfaces of the zinc oxide nanorods are of a netted structure. The zinc oxide nano-structure provided by the invention is a super-hydrophobic nano-structure with super-strong water drop adsorption capacity, and wettability of the petal-like surface of the zinc oxide nano-structure is superior to that of an existing zinc oxide nano material. The preparation method disclosed by the invention is simple, has no pollution, is low in cost, is easy to implement and is convenient to control.

Description

technical field [0001] The invention belongs to the field of nanometer materials, in particular to a method for preparing a ZnO nanostructure with petal effect. Background technique [0002] Wettability is one of the important characteristics of solid surface, which is closely related to the microscopic geometric structure and chemical composition of the solid surface. Wettability is generally measured by the contact angle of a liquid on a solid surface. A solid surface with a contact angle of less than 90° is called a hydrophilic surface, and a surface with a contact angle of less than 10° is a superhydrophilic surface; and a surface with a contact angle greater than 90° is called a hydrophobic surface. , more than 150° are called superhydrophobic surfaces. Due to the unique surface wettability, superhydrophobic surfaces have promising application prospects in the fields of self-cleaning, anti-corrosion, and microfluidic devices, which have aroused people's research intere...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G9/02B82Y30/00B82Y40/00
Inventor 赵敏吕建国刘昌龙江瑶瑶孙悦尚凤娇
Owner HEFEI NORMAL UNIV
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