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Preparation method of metal nanoflakes

A technology of metal nano and nano sheets, which is applied in metal processing equipment, nanotechnology, transportation and packaging, etc., can solve the problems of difficult template method and non-template method preparation, metal nickel nano sheet preparation report has not been found, etc., to achieve convenient Reaction rate, wide-thickness ratio, and easy-to-clean effect

Inactive Publication Date: 2018-11-09
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 nanoflakes
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  • Preparation method of metal nanoflakes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A method for preparing metal nanosheets, comprising the following steps:

[0037] Step 1, adding 2mL of concentrated ammonia water with a mass fraction of 25% in the nickel chloride solution, then adding 0.05gNaOH, then adding 2mL of a hydrazine hydrate solution with a mass fraction of 80%, stirring and mixing to obtain a mixed solution; The preparation method of nickel solution is: add 0.02g NiCl into 20mL water, stir and dissolve;

[0038] Step 2: Put conductive glass in the lining of the hydrothermal reaction kettle, transfer the mixed solution into the lining of the hydrothermal reaction kettle, seal it, and keep the temperature at 90°C for 14 hours to obtain thick nickel nanometers grown on the substrate. piece;

[0039] Step 3, washing the rough nickel nanosheets repeatedly in pure water and ethanol for several times, and drying to obtain the nickel nanosheets.

[0040] figure 2 with 3 A scanning electron microscope image of the nickel nanosheets prepared in ...

Embodiment 2

[0042] A method for preparing metal nanosheets, comprising the steps of:

[0043]Step 1: Add 0.02g NaOH to the nickel chloride solution, then add 2mL of hydrazine hydrate solution with a mass fraction of 80%, stir and mix evenly to obtain a mixed solution; the preparation method of the nickel chloride solution is: add 0.02g NiCl 20mL water, stir to dissolve;

[0044] Step 2: Put conductive glass in the lining of the hydrothermal reaction kettle, transfer the mixed solution into the lining of the hydrothermal reaction kettle, seal it, and keep the temperature at 90°C for 14 hours to obtain thick nickel nanometers grown on the substrate. piece;

[0045] Step 3, washing the rough nickel nanosheets repeatedly in pure water and ethanol for several times, and drying to obtain the nickel nanosheets.

[0046] Figure 4 A scanning electron microscope image of the nickel nanosheets prepared in Example 2 is shown, and the size of the prepared nickel nanosheets is about 100 nm.

Embodiment 3

[0048] A method for preparing metal nanosheets, comprising the following steps:

[0049] Step 1: Add 0.05gNaOH to the nickel chloride solution, then add 2mL of hydrazine hydrate solution with a mass fraction of 80%, stir and mix evenly to obtain a mixed solution; the preparation method of the nickel chloride solution is: add 0.02g NiCl 20mL water, stir to dissolve;

[0050] Step 2: Put conductive glass in the lining of the hydrothermal reaction kettle, transfer the mixed solution into the lining of the hydrothermal reaction kettle, seal it, and keep the temperature at 90°C for 14 hours to obtain thick nickel nanometers grown on the substrate. piece;

[0051] Step 3, washing the rough nickel nanosheets repeatedly in pure water and ethanol for several times, and drying to obtain the nickel nanosheets.

[0052] Figure 5 A scanning electron microscope image of the nickel nanosheets prepared in Example 3 is shown, and the size of the prepared nickel nanosheets is about 100 nm. ...

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Abstract

The invention discloses a method for preparing metal nano-flakes, which belongs to the field of nano-material preparation, and aims to solve the technical problems of thick nickel nano-flakes and poor quality, which includes (1) adding concentrated ammonia water to nickel chloride solution in, then add NaOH solution, then add hydrazine hydrate solution, stir to obtain a mixed solution; (2) the substrate can be placed in the lining of the hydrothermal reaction kettle, and the mixed solution is transferred to the lining of the hydrothermal reaction kettle , sealed, and kept at 80-120° C. for 12-24 hours at a constant temperature to obtain thick nickel nanosheets or thick nickel nanosheets grown on a substrate; (3) repeatedly washing and drying the thick nickel nanosheets in pure water and ethanol to obtain Nickel nanosheets. The present invention adopts a mild organic surfactant-free method to prepare and obtain nickel metal nano-flakes through spontaneous growth, the thickness of which can be controlled below 10 nanometers, the quality of the prepared nickel nano-flakes is high, the surface is not covered by active agents, and the cost is low. It is suitable for mass production and has a very wide range of applications in electrocatalysis.

Description

technical field [0001] The invention belongs to the field of nanomaterial preparation, and in particular relates to a method for preparing metal nanosheets. Background technique [0002] Nanosheets and two-dimensional nanomaterials have become a new type of nanomaterials because of their special properties different from bulk and other nanostructures. Large, forming a thin sheet-like material, so the special shape, resulting in its unique properties, has attracted a lot of research attention. Therefore, many reports on the preparation of other two-dimensional materials have also appeared. 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 prepared by templates, while for thinner It is difficult to prepare nanosheets by template and non-template methods. [0003] Metal nickel nanomaterials have high electrochemical activity and catalytic propertie...

Claims

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Application Information

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Patent Type & Authority Patents(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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