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Method for preparing alkali zinc chloride nano-powder in hexagonal flake structures

A nano-powder, flake-like technology, applied in the field of nano-materials, can solve the problems of high risk, low yield, cumbersome steps, etc., and achieve the effect of improving yield

Inactive Publication Date: 2012-06-20
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But in general, the existing synthetic methods have the following defects: (1) zinc oxide nanoparticles need to be prepared first, and the steps are cumbersome; (2) they need to be reacted under high temperature and high pressure hydrothermal conditions, which is dangerous and the yield is low

Method used

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  • Method for preparing alkali zinc chloride nano-powder in hexagonal flake structures
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  • Method for preparing alkali zinc chloride nano-powder in hexagonal flake structures

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Choose anhydrous zinc chloride (ZnCl 2 ) as a zinc salt reagent (0.2mol / l), hexamethylenetetramine as a hydroxyl reagent (0.2mol / l), the molar ratio of the two is 1:1, and the volume ratio is 20 milliliters of water-ethanol solution of 1:1 As a solvent, prepare the precursor solution for the ZHC reaction. Dissolve anhydrous zinc chloride in water first, then add hexamethylenetetramine under stirring condition, adjust the pH value of the solution to 6.0 with dilute hydrochloric acid, add ethanol, and obtain the ZHC precursor solution after static defoaming.

[0022] After the precursor solution was prepared, it was placed in an oven and heated from room temperature to 70°C for 1 hour.

[0023] Use a centrifuge to collect the white precipitate at the bottom of the container, wash it with water and ethanol three times, and dry it in an oven at 105°C to obtain ZHC nanoflake powder.

[0024] From attached figure 1 The provided X-ray diffraction pattern shows that the obta...

Embodiment 2

[0029] Zinc chloride hydrate (ZnCl 2 .4H 2 O) is a zinc salt reagent (0.1mol / l), hexamethylenetetramine is as a hydroxyl reagent (0.2mol / l), and the molar ratio of the two is 1: 2, and the volume ratio is 20 milliliters of water-ethyl alcohol of 3: 1 The diol solution is used as a solvent to prepare the precursor solution for the ZHC reaction. Dissolve zinc chloride hydrate in water first, then add hexamethylenetetramine under stirring condition, adjust the pH value of the solution to 6.0 with dilute hydrochloric acid, add ethanol, and obtain the ZHC precursor solution after static defoaming.

[0030] After the precursor solution is prepared, it is placed in a water bath at 70° C., and the reaction time is 4 hours. Use a centrifuge to collect the white precipitate at the bottom of the container, wash it with water and ethanol three times, and dry it in an oven at 105°C to obtain ZHC nanoflake powder. The product morphology is close to Example 1.

Embodiment 3

[0032] Choose anhydrous zinc chloride (ZnCl 2 ) is zinc salt reagent (0.05mol / l), urea is as hydroxyl reagent (0.2mol / l), and both molar ratio is 1: 2, and volume ratio is 20 milliliters of water-ethylene glycol solutions of 1: 3 as solvent, Prepare the precursor solution for the ZHC reaction. First dissolve zinc chloride hydrate in water, then add hexamethylenetetramine under agitation, adjust the pH value of the solution to 4.0 with dilute hydrochloric acid, add an appropriate amount of ethylene glycol, and get the ZHC precursor solution after static defoaming .

[0033] After the precursor solution is prepared, it is placed in a water bath at 95°C, and the reaction time is 24 hours. Use a centrifuge to collect the white precipitate at the bottom of the container, wash it with water and ethanol three times, and dry it in an oven at 105°C to obtain ZHC nanoflake powder. The morphology of the obtained ZHC nanosheets was similar to Example 1, but the thickness was increased ...

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Abstract

The invention discloses a method for preparing alkali zinc chloride nano-powder in hexagonal flake structures, which is characterized by including steps: dissolving zinc chloride and hydroxyl reagent into water or water-alcohol mixed solution, adjusting the solution pH within a range of from 2.0 to 9.0, and obtaining the alkali zinc chloride nano-powder after chemical precipitation reaction under water bath at 50-99 DEG C or heating via an oven for 0.1-72 hours. The molecular formula of the alkali zinc chloride is Zn5(OH)8C12 (H2O), each flake is regularly hexagonal, the size of each flake ranges from 0.1 micrometer to 100 micrometer, and the thickness of each flake ranges from 20 nanometers to x micrometers. The alkali zinc chloride nano-powder which is a zinc-contained compound in a special hexagonal flake structure is expected to be applied in fields of chemical synthesis, chemical catalysis, photocatalysis, sensors, nano devices and the like.

Description

technical field [0001] The invention relates to the preparation of a basic zinc oxide nano powder, in particular to a preparation method of a basic zinc chloride nano powder with a hexagonal flaky structure, which belongs to the field of nano materials. Background technique [0002] With the rise of nanomaterials and technologies in recent years, the controllable preparation of nanostructures has received more and more attention. However, although people have successfully synthesized nanostructures of various shapes, such as nanowires, nanorods, nanotubes, and ring-shaped, hexagonal, tetrapod-shaped, pagoda-shaped, flower-shaped nanomaterials, etc. It is still very difficult to achieve precise control of the microscopic morphology and structure of materials at the scale. Especially for the currently reported two-dimensional nanostructures such as nanosheets and nanoplates (such as silver nanosheets, MnO 2 , NiO, MoS 2 Nanosheets), whose shapes are usually irregular, how t...

Claims

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Application Information

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IPC IPC(8): C01G9/04B82Y40/00
Inventor 高相东李效民
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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