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Preparation method of metal nanosheet

A metal nanometer and metal film technology, applied in nanotechnology, metal material coating process, ion implantation plating, etc., can solve the problems of large specific surface area of ​​metal nanosheets, long preparation period, and complicated construction steps of metal nanosheets.

Active Publication Date: 2021-09-14
HANGZHOU DIANZI UNIV
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Problems solved by technology

[0007] In order to overcome the problems of cumbersome construction steps and long preparation period of metal nanosheets, the present invention provides a method for preparing metal nanosheets, which combines PS colloidal ball templates with physical deposition technology, has simple steps, less metal consumption, and good repeatability , and the prepared metal nanosheets have a large specific surface area

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Examples

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Embodiment 1

[0032] A preparation method of silver nanosheets, comprising the following steps:

[0033] (A) Utilize the self-assembly method to self-assemble a densely packed PS colloidal ball array template with a diameter of 200 nm on a silicon substrate with a hydrophilic surface (such as figure 1 shown in A);

[0034] (B) after the Ag film with a thickness of 30nm is sputtered on the surface of the PS colloidal sphere array template obtained in step (A), an Ag nanocap array (such as figure 1 as shown in B);

[0035] (C) Continue sputtering a layer of SiO with a thickness of 5 nm in step (B) 2 film, repeating steps (B) and (C) 3 times to obtain nanopillars [Ag / SiO 2 ]n (n=4) multilayer film structure (such as figure 1 C shown);

[0036] (D) For the nanocolumns [Ag / SiO obtained in step (C) 2 ]n (n=4) multilayer film structure Remove the PS colloidal ball array with tetrahydrofuran solution, and wash repeatedly with alcohol or deionized water (such as figure 1 as shown in D);

[0...

Embodiment 2

[0039] A method for preparing silver nanosheets. The difference from Example 1 is that the annealing temperature of step (E) in this example is 300° C., and the structure surface does not change substantially, such as figure 2 -a shown.

Embodiment 3

[0041] A preparation method of silver nanosheets, different from Example 1, the annealing temperature of step (E) in this example is 400°C, and the surface of the structure has the phenomenon of grain growth, such as figure 2 -b shown.

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Abstract

The invention relates to the technical field of nano composite material synthesis, and provides a preparation method of a metal nanosheet. The preparation method aims at the problems of tedious construction steps and long preparation period of the metal nanosheet. The preparation method comprises the following steps that firstly, a densely arranged PS colloidal sphere array is self-assembled on a silicon substrate to obtain an ordered PS colloidal sphere array template; a layer of metal film is formed on the surface through magnetron sputtering, and a metal nano cap array (MFON) is formed; an oxide thin film is continuously sputtered on the surface, and the metal film and the oxide thin film are repeatedly sputtered for 0-9 times to obtain a nanorod [M / (XaOb)] n (n = 1-10) multilayer film structure; and finally, the PS colloidal sphere array is removed, annealing treatment is carried out, and the metal nanosheet is obtained. According to the preparation method, a PS colloidal sphere template and a physical deposition technology are combined, the steps are simple, metal consumption is low, repeatability is good, and the prepared metal nanosheet is large in specific surface area.

Description

technical field [0001] The invention relates to the technical field of synthesis of nanocomposite materials, in particular to a method for preparing metal nanosheets. Background technique [0002] With the rapid increase of the world's population and the continuous improvement of the degree of industrialization, the increasingly severe environmental pollution and energy shortages have become one of the important challenges facing human society. Driven by solar energy, the photocatalytic reaction can not only catalyze the degradation of various pollutants, but also catalyze the decomposition of water to generate hydrogen and oxygen. It is a green, efficient and effective method to solve energy and environmental pollution problems. Recent studies have found that growing metal nanoparticles with catalytic properties such as Pt (Ni, Pd, Ru, etc.) on a substrate with a large specific surface area can help improve catalytic efficiency. The metal nanosheets grown after annealing h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/06B22F1/00B82Y40/00C23C14/08C23C14/10C23C14/20C23C14/22C23C14/35C23C14/58G01N21/65
CPCB22F9/06C23C14/35C23C14/223C23C14/205C23C14/10C23C14/083C23C14/08C23C14/5873C23C14/0005C23C14/5806B82Y40/00G01N21/658
Inventor 温嘉红赵晓宇杨志峰王雅新张永军
Owner HANGZHOU DIANZI UNIV
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