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Polyhedron zinc oxide and preparation method thereof

A polyhedron and zinc oxide technology, which is applied in the direction of zinc oxide/zinc hydroxide, etc., can solve the problems of complex process and high energy consumption

Active Publication Date: 2018-06-15
宁夏京成天宝科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In existing reports, such as the invention patent (application number: 201610257101.6, application date: 2016-04-22, publication number CN 105948101 A, publication date: 2016-09-21), ZnO nanorods are first prepared, and then Corrugated ZnO nanorods are obtained by high-temperature calcination, and the nanorods are wrapped by high-surface-energy crystal planes. This invention needs to be etched at high temperature and in a reducing atmosphere (such as hydrogen), so the process is relatively complicated and the energy consumption is high.

Method used

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[0022] The invention discloses a preparation method of polyhedral zinc oxide, comprising the following steps:

[0023] Step 1. Under magnetic stirring, dissolve NaOH in absolute ethanol solution, wherein the molar volume ratio (mmol / mL) of NaOH to absolute ethanol solution is 22:20-25:20, after completely dissolving, add Zn (NO 3 ) 2 ·6H 2 O continued stirring and dissolving, wherein, Zn(NO 3 ) 2 ·6H 2 The molar ratio of O to NaOH is 1:22-1:25;

[0024] Step 2. After completely dissolving, transfer to a 35mL polytetrafluoroethylene liner reactor and react at 210-230°C for 4-8h;

[0025] Step 3. Naturally cool to room temperature, centrifuge, wash the precipitate three times with deionized water and absolute ethanol respectively, and then dry in an oven at 55-65° C. to obtain ZnO polyhedron with high surface energy exposure.

[0026] In existing reports, ZnO nanoparticles are obtained mainly in rod-like and sheet-like structures, and their exposed crystal planes are all ...

Embodiment 1

[0029] A kind of preparation method of polyhedral zinc oxide, comprises the following steps: under magnetic stirring, the NaOH that takes by weighing 24mmol is dissolved in 20mL dehydrated alcohol solution, after dissolving completely, add 1.0mmol Zn(NO 3 ) 2 ·6H 2 O continued to stir and dissolve, and after it was completely dissolved, it was transferred to a 35mL polytetrafluoroethylene liner reactor, and reacted at 220°C for 6h. Cool naturally to room temperature, centrifuge, wash the precipitate three times with deionized water and absolute ethanol, and then dry in an oven at 60°C to obtain ZnO polyhedra with high surface energy exposure. Such as figure 1 As can be seen from the scanning electron microscope photos, the obtained product has a polyhedral structure. Do XRD analysis from figure 2 It can be seen that all the diffraction peaks are consistent with the standard spectrum of zinc oxide with hexagonal wurtzite structure (JSPDS No. 3621451).

Embodiment 2

[0031] A preparation method of polyhedral zinc oxide, comprising the steps of: under magnetic stirring, NaOH is dissolved in absolute ethanol solution, wherein, the molar volume ratio (mmol / mL) of NaOH and absolute ethanol solution is 22:20, After complete dissolution, add Zn(NO 3 ) 2 ·6H 2 O continued stirring and dissolving, wherein, Zn(NO 3 ) 2 ·6H 2 The molar ratio of O to NaOH is 1:22; after being completely dissolved, transfer it to a 35mL polytetrafluoroethylene liner reactor, and react at 210°C for 8h; naturally cool to room temperature, centrifuge, and deionized water respectively and absolute ethanol for three times, and then dried in an oven at 55°C to obtain ZnO polyhedrons with high surface energy exposure.

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Abstract

The invention discloses a polyhedron zinc oxide and a preparation method of the polyhedron zinc oxide. The preparation method comprises the following steps that NaOH is dissolved in an absolute ethylalcohol solution under magnetic force stirring, and after completed dissolving, Zn(NO3)2.6H2O is added to continue to be stirred for dissolving; the mixture is transferred into a reaction kettle of apolytetrafluoroethylene inner container after being completely dissolved; the temperature is naturally decreased to room temperature, centrifugal separation is carried out, deionized water and absolute ethyl alcohol are used for washing precipitate three times, and the product is dried in a drying oven to obtain the high-surface-energy exposed ZnO polyhedron. The growth speed of zinc oxide crystalfaces can be controlled, and the high-surface-energy crystal face exposed ZnO polyhedron is obtained.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic nano functional materials, and in particular relates to a polyhedral zinc oxide and a preparation method thereof. Background technique [0002] ZnO is a widely used wide bandgap semiconductor material, which has a bandgap width of 3.37eV and an exciton binding energy of 60MeV, and is widely used in sensors, catalysts and other fields. [0003] The performance of zinc oxide is closely related to its exposed crystal plane. In particular, crystals with high surface energy exposed crystal planes generally have high chemical activity, so the preparation of zinc oxide nanocrystals with high surface energy exposed crystal planes is of great significance for improving the performance of zinc oxide. [0004] In existing reports, such as the invention patent (application number: 201610257101.6, application date: 2016-04-22, publication number CN 105948101 A, publication date: 2016-09-21), ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G9/02
CPCC01G9/02C01P2002/72C01P2004/03
Inventor 殷竟洲张莉莉李荣清蒋正静赵朴素程志鹏王红艳文静
Owner 宁夏京成天宝科技有限公司