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Preparation method of nickel hydroxide nanometer sheets with hole two-dimensional structures

A two-dimensional structure, nickel hydroxide technology, applied in nickel oxide/nickel hydroxide, nanotechnology and other directions, can solve the problems of limited research progress and difficult morphology, and achieve good chemical stability, uniform pore structure, and pore size. Small scale effect

Inactive Publication Date: 2016-12-07
HUAIBEI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although there have been many reports on the preparation of two-dimensional nickel hydroxide, the research progress on how to further expand its morphology and improve its catalytic performance is very limited.
Especially when the scale of the material is reduced to the nanometer level, how to design and control the shape is more difficult

Method used

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  • Preparation method of nickel hydroxide nanometer sheets with hole two-dimensional structures
  • Preparation method of nickel hydroxide nanometer sheets with hole two-dimensional structures
  • Preparation method of nickel hydroxide nanometer sheets with hole two-dimensional structures

Examples

Experimental program
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Effect test

Embodiment 1

[0033] A method for preparing nickel hydroxide nanosheets with a two-dimensional structure with pores, the steps comprising:

[0034] 1. Weigh 0.5 g of nickel acetate tetrahydrate, 0.9 g of zinc nitrate hexahydrate and 0.7 g of urea, dissolve and disperse them in 10 ml of deionized water, and fully dissolve them under the action of magnetic stirring to form a clear Clear green solution.

[0035] 2. Transfer the above-mentioned clear and transparent green solution to an oil bath, heat at 90° C. for 6 hours, and cool to room temperature naturally after the reaction is over.

[0036] 3. Take out the green precipitated product generated after the reaction, and wash three times each with deionized water and absolute ethanol to obtain a green solid powder.

[0037] 4. Dry the above black solid powder in a vacuum drying oven at 50°C to constant weight for use.

[0038] 5. Weigh 30 mg of the dried sample, disperse it in 3 ml of 1 mol / liter sodium hydroxide solution and stir magnetic...

Embodiment 2

[0042] The present embodiment is a verification example, and the difference from the preparation method of Example 1 is that the consumption of zinc nitrate hexahydrate is adjusted respectively, with 0.6 grams of zinc nitrate hexahydrate, 0.3 grams of zinc nitrate hexahydrate, 0 grams of zinc nitrate hexahydrate, participate in reactions such as Figure 4 , Figure 5 , Image 6 As can be seen from the TEM photos of the obtained samples, although several samples also showed two-dimensional morphology, they did not show porous properties, indicating that in the preparation of porous nickel hydroxide In the case of nanosheets, a relatively large amount of zinc needs to be introduced on the nanosheet substrate in advance, so that a relatively obvious and uniform porous structure can be displayed after being corroded by sodium hydroxide.

Embodiment 3

[0044] The difference from the preparation method of Example 1 is that in step 5, only room temperature magnetic stirring is used, no heat treatment is used, corrosion at room temperature is retained, and other processes remain unchanged, and the obtained sample is as follows: Figure 7 and Figure 8 As shown in the TEM photo, it can be seen that it not only maintains a two-dimensional structure but also exhibits uniform and porous characteristics, but through EDS analysis, it can be found that the zinc impurities have not been removed completely, and the measured atomic ratio of nickel and zinc is 2.12:1.

[0045] It can be seen that the heating magnetic stirring step of Example 1 is better.

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Abstract

The invention discloses a preparation method of nickel hydroxide nanometer sheets with hole two-dimensional structures. The method comprises the following steps of dispersing nickel acetate, zinc nitrate and urea into a container containing deionized water for sufficient dissolution and dispersion to form a clear and transparent green solution; putting the obtained solution into an oil bath pot; maintaining the magnetic force stirring; heating the oil bath pot to a certain temperature to perform chemical reaction; stopping heating; naturally cooling to room temperature; after the complete cooling, performing centrifugation; collecting synthesized green samples; washing for many times by a mixed solution of deionized water and absolute ethyl alcohol; putting obtained sample powder into a vacuum drying box to perform vacuum drying; weighing a certain number of materials, and putting the materials into a sodium hydroxide solution; performing magnetic stirring; washing for many times a product by deionized water and absolute ethyl alcohol; performing vacuum drying to obtain the nickel hydroxide nanometer sheets. The preparation method has the advantages that the operation in the process is simple; the reaction conditions are mild; the toxicity of used materials is low; the porous structures obtained through preparation are uniform; the hole diameter is small; the chemical stability is good; the catalytic performance is obviously improved.

Description

technical field [0001] The invention relates to a preparation method of nickel hydroxide nanosheets, in particular to a preparation method of nickel hydroxide nanosheets with a two-dimensional structure of pores. Background technique [0002] Two-dimensional materials generally exhibit superior performance compared to three-dimensional materials in electronics, optics, and catalysis due to their specific dimensional confinement structure. The study of two-dimensional structures has attracted a lot of attention in the field of catalysis because of their large specific surface area and abundant permeation channels for the adsorption and transport of ions. When the thickness of the material is reduced to a few atomic layers, almost all atoms will be exposed on the surface of the material as active sites, and the specific two-dimensional electronic structure will also change the interaction between the active sites and reactant molecules , which in turn promotes the catalytic r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/04B82Y40/00
CPCC01G53/04C01P2002/72C01P2002/85C01P2004/04C01P2004/20C01P2006/40
Inventor 孔祥恺彭振猛刘强春
Owner HUAIBEI NORMAL UNIVERSITY