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ZnO microcrystal with four-feet shape structure and its preparation method

A microcrystalline and morphology technology, applied in the direction of zinc oxide/zinc hydroxide, etc., to achieve the effect of simple operation and low cost

Inactive Publication Date: 2010-05-26
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved in the present invention is to disclose a ZnO microcrystal with a tetrapod morphology and a preparation method thereof, so as to overcome the above-mentioned defects in the prior art and provide a tetrapod microcrystal with low cost, simple operation and no need for complex equipment. ZnO with foot-like structure and preparation method thereof

Method used

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  • ZnO microcrystal with four-feet shape structure and its preparation method
  • ZnO microcrystal with four-feet shape structure and its preparation method
  • ZnO microcrystal with four-feet shape structure and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Using analytically pure zinc nitrate hexahydrate (Zn(NO 3 ) 2 ·6H 2 O) is zinc source

[0019] (1) 2ml 0.5mol·L -1 Zn(NO 3 ) 2 ·6H 2 O solution, 14ml of n-heptane and ethylenediamine (0.032ml) as an auxiliary agent were added into a 50ml beaker, and stirred at room temperature for 5 minutes to form a solution system.

[0020] (2) Move the solution system in the above step (1) into a stainless steel autoclave with Teflon lining, control the filling degree in the container to be 80%, then seal the autoclave and place it in an incubator , kept at 180°C for 12h and then cooled to room temperature naturally.

[0021] (3) Wash and separate the white precipitate at the bottom of the autoclave in step (2) with deionized water for 3 times, and dry at 60° C. for 4 hours in an air atmosphere to obtain tetrapod ZnO microcrystals.

[0022] By the method described in Example 1, tetrapod ZnO crystallites formed by self-assembly of hexagonal microrods can be obtained. Its hexa...

Embodiment 2

[0024] (1) Zn(NO 3 ) 2 ·6H 2 O, n-heptane, ethylenediamine and water were mixed and stirred at room temperature for 10 minutes to form a solution system, so that Zn 2+ The molar concentration is 0.1mol L -1 , ethylenediamine and Zn 2+ The ratio of the amount of substance is 1: 1, and the volume ratio of deionized water and n-heptane is 1: 8;

[0025] (2) Move the solution system in the step (1) into the autoclave, control the filling degree in the container at 70%, then seal the autoclave, and place it in an incubator, at 160 ° C, after reacting for 6 hours, naturally Cool to room temperature;

[0026] (3) The white precipitate at the bottom of the autoclave in step (2) was washed with absolute ethanol, separated three times, and then dried at 50° C. for 4 hours in an air atmosphere to obtain ZnO microcrystals with a tetrapod structure.

Embodiment 3

[0028] (1) Zn(NO 3 ) 2 ·6H 2 O, n-heptane, ethylenediamine and water were mixed and stirred at room temperature for 5 minutes to form a solution system so that Zn 2+ The molar concentration is 1mol L -1 , ethylenediamine and Zn 2+ The ratio of the amount of substance is 1: 3, and the volume ratio of deionized water and n-heptane is 1: 6;

[0029] (2) Move the solution system in the step (1) into the autoclave, control the filling degree in the container at 90%, then seal the autoclave, and place it in an incubator, at 180 ° C, after 24 hours of reaction, the natural Cool to room temperature;

[0030] (3) After washing and separating the white precipitate at the bottom of the autoclave in step (2) for 6 times, drying at 80° C. for 6 hours in an air atmosphere to obtain ZnO microcrystals with a tetrapod structure.

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Abstract

The invention discloses a kind of preparing method of ZnO crystallite which has a pattern of all fours, the ZnO crystallite consists of microcylinder of hexagon which is self-assembly; it has a pattern of all fours. The preparing method includes the following steps: make the mixed solution of zinc, normal heptane, assistant and water reacts at temperature of160-180 degree C for 6-24h, cool them toroom temperature, collect the reacting product and dry it at temperature of 50-80 degree C in the air for4-6h.Compared to the existing technology, the invention adopts hydro-thermal synthesis, get ZnO crystallite which has a pattern of all fours and the same plane consisted of microcylinder of hexagon which is self-assembly, the cost is low, the operation is simple, and it no needs complex equipment.

Description

technical field [0001] The invention relates to a ZnO microcrystal and a preparation method thereof, in particular to a preparation method of a tetrapod ZnO microcrystal. Background technique [0002] The electronic and optical properties of inorganic materials are mainly determined by the size and morphology of inorganic micro- and nanocrystals. At present, the work of many scientific researchers mainly focuses on how to control the size and shape of inorganic micro- and nano-crystals. If we can synthesize micro- and nano-crystals with complex shapes and good three-dimensional structures, new functional materials and their further applications will appear. [0003] ZnO is a II-VI wide bandgap compound semiconductor with a wurtzite hexagonal structure, space group P63mc, high C-axis orientation, similar lattice constant to GaN, and a bandgap width of 3.37eV. ZnO material has high exciton binding energy at room temperature (about 60meV, compared with 21meV for GaN and 20meV...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G9/02
Inventor 李春忠江浩胡俊青
Owner EAST CHINA UNIV OF SCI & TECH
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