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Preparation method of metal nanosheets

A metal nano and nano flake technology, applied in metal processing equipment, nano technology, transportation and packaging, etc., can solve the problems of difficult template method and non-template method preparation, and reports on the preparation of metal nickel nano flakes have not yet been discovered, etc. Large ratio, large feature size, mild effect

Inactive Publication Date: 2017-05-31
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For two-dimensional materials, due to their good anisotropy, the metal nanomaterials obtained through growth are mainly particles, or other nanostructures such as nanowire arrays are prepared through templates. Nanosheets are difficult to prepare by template and non-template methods
At present, the preparation report of thinner metallic nickel nanoflakes has not been found yet.

Method used

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  • Preparation method of metal nanosheets
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  • Preparation method of metal nanosheets

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A method for preparing metal nano flakes includes the following steps:

[0039] Step 1. Add 2 mL of 25% concentrated ammonia water to the nickel chloride solution, then add 0.05 g of NaOH, and then add 2 mL of 80% hydrazine hydrate solution, stir and mix to obtain a mixed solution; the chlorination The preparation method of nickel solution is as follows: add 0.02g NiCl into 20mL water and stir to dissolve;

[0040] Step 2. Put conductive glass in the inner lining of the hydrothermal reaction kettle, and transfer the mixed solution into the inner lining of the hydrothermal reaction kettle, seal, and keep at 90°C for 14 hours to obtain the coarse nickel nanometers grown on the substrate sheet;

[0041] Step 3: The crude nickel nanosheets are repeatedly washed in pure water and ethanol for many times, and dried to obtain nickel nanosheets.

[0042] figure 2 with 3 The scanning electron micrograph of the nickel nanosheet prepared in Example 1 is shown, and the size of the prepare...

Embodiment 2

[0044] A method for preparing metal nano flakes includes the following steps:

[0045] Step 1. Add 0.02g NaOH to the nickel chloride solution, then add 2mL of 80% hydrazine hydrate solution, stir and mix uniformly to obtain a mixed solution; the preparation method of the nickel chloride solution is: 0.02g NiCl is added Dissolve in 20mL water with stirring;

[0046] Step 2. Put conductive glass in the inner lining of the hydrothermal reaction kettle, and transfer the mixed solution into the inner lining of the hydrothermal reaction kettle, seal, and keep at 90°C for 14 hours to obtain the coarse nickel nanometers grown on the substrate sheet;

[0047] Step 3: The crude nickel nanosheets are repeatedly washed in pure water and ethanol for many times, and dried to obtain nickel nanosheets.

[0048] Figure 4 The scanning electron micrograph of the nickel nanosheet prepared in Example 2 is shown, and the size of the prepared nickel nanosheet is about 100 nm.

Embodiment 3

[0050] A method for preparing metal nano flakes includes the following steps:

[0051] Step 1. Add 0.05g of NaOH to the nickel chloride solution, and then add 2mL of 80% hydrazine hydrate solution, stir and mix uniformly to obtain a mixed solution; the preparation method of the nickel chloride solution is: adding 0.02g NiCl Dissolve in 20mL water with stirring;

[0052] Step 2. Put conductive glass in the inner lining of the hydrothermal reaction kettle, and transfer the mixed solution into the inner lining of the hydrothermal reaction kettle, seal, and keep at 90°C for 14 hours to obtain the coarse nickel nanometers grown on the substrate sheet;

[0053] Step 3: The crude nickel nanosheets are repeatedly washed in pure water and ethanol for many times, and dried to obtain nickel nanosheets.

[0054] Figure 5 The scanning electron microscope image of the nickel nanosheet prepared in Example 3 is shown, and the size of the prepared nickel nanosheet is about 100 nm.

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Abstract

The invention discloses a preparation method of metal nanosheets. The preparation method comprises the steps that 1, strong ammonia water is added into a nickel chloride solution, a NaOH solution is added, a hydrazine hydrate solution is added, the solutions are stirred and mixed to be uniform, and a mixed solution is obtained; 2, a substrate can be placed in a lining of a hydrothermal reaction kettle, the mixed solution is transferred into the lining of the hydrothermal reaction kettle, the hydrothermal reaction kettle is sealed, the constant temperature ranging from 80 DEG C to 120 DEG C is kept for 12-24 hours, and crude nickel nanosheets or crude nickel nanosheets growing on the substrate are obtained; 3, the crude nickel nanosheets are repeatedly cleaned multiple times in pure water and ethyl alcohol, drying is conducted, and the nickel nanosheets are obtained. According to the preparation method, the nickel metal nanosheets are obtained through spontaneous growth by means of a mild organic surfactant-free method, the thickness of the nickel metal nanosheets can be controlled to be 10 nanometers or below, the prepared nickel nanosheets are high in quality, the surfaces of the nickel nanosheets are not covered with active agents, and the nickel nanosheets are low in cost and suitable for mass production.

Description

Technical field [0001] The invention belongs to the field of nano material preparation, and specifically relates to a method for preparing metal nano flakes. Background technique [0002] Nanosheets and two-dimensional nanomaterials have become a new type of nanomaterials due to their special properties that are different from bulk and other nanostructures. Two-dimensional materials refer to three-dimensional scales, one of which is very thin, and the other two are relatively thin. Large, forming flake-like materials, so the special morphology, creating its unique properties, has attracted a lot of research attention. Therefore, many reports on the preparation of other two-dimensional materials have also appeared. Two-dimensional materials. For metal nanomaterials, due to its good anisotropy, the metal nanomaterials currently obtained by growth are mainly particles, or other nanostructures such as nanowire arrays can be prepared by templates. Nanosheets are difficult to prepare...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B82Y40/00
CPCB82Y40/00B22F9/24B22F1/0551B22F1/054
Inventor 胡海龙郑奎李玉禾刘文华马国华张行泉郭宝刚
Owner SOUTHWEAT UNIV OF SCI & TECH
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