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Macroporous-mesoporous-microporous zinc oxide material and preparation method and application thereof

A technology of zinc oxide and zinc oxide particles, applied in chemical instruments and methods, zinc oxide/zinc hydroxide, material resistance, etc., can solve the problems of low diffusion efficiency and few reports of zinc oxide nanomaterials, and achieve no pollutants Enhanced emissions, diffusion effects, and performance-enhancing effects

Inactive Publication Date: 2017-07-21
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, ZnO nanomaterials with macroporous-mesoporous-microporous structures have rarely been reported.
Moreover, in the use of zinc oxide with a conventional pore structure, the diffusion efficiency of the reactant in the pore is not high. How to optimize the pore structure and improve the diffusion of the reactant is a difficult problem.
The porous ZnO Murray material optimized according to a certain law has not been reported so far.

Method used

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  • Macroporous-mesoporous-microporous zinc oxide material and preparation method and application thereof
  • Macroporous-mesoporous-microporous zinc oxide material and preparation method and application thereof
  • Macroporous-mesoporous-microporous zinc oxide material and preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0039] A zinc oxide nanomaterial, its preparation method comprises the following steps:

[0040] 1) Weigh 0.2 g of zinc acetylacetonate and add it to 4 g of oleylamine, stir evenly to obtain a translucent solution;

[0041] 2) Heat the translucent solution obtained in step 1) to 250°C for constant temperature reaction for 60 minutes, condense and reflux during the reaction, and then cool naturally to obtain an off-white precipitate;

[0042] 3) The off-white precipitate obtained in step 2) is washed with ethanol three times on the centrifuge (centrifugal speed is 3000r / min), and then dispersed in hexane; the zinc oxide nanomaterial is obtained after standby.

[0043] The product obtained in this embodiment is determined to be zinc oxide through X-ray diffraction analysis, and its X-ray diffraction pattern is shown in figure 1 ; Transmission electron microscopy (TEM) analysis shows that this product is a nanoparticle with many micropores, the particle size is 30nm, and its mic...

Embodiment 2

[0045] A kind of macroporous-mesoporous-microporous zinc oxide material, its preparation method comprises the following steps:

[0046] 1) Weigh 0.198g of zinc acetylacetonate and add it to 4g of oleylamine, stir evenly to obtain a translucent solution;

[0047] 2) Heat the translucent solution obtained in step 1) to 150°C and react at a constant temperature for 60 minutes, condense and reflux during the reaction, then cool naturally to obtain a grayish white precipitate; then wash 3 times with ethanol on the centrifuge (centrifugal speed: 3000r / min) to wash;

[0048] 3) Dispersing the gray-white precipitate obtained in step 2) in normal hexane to obtain a suspension, controlling the concentration of the gray-white precipitate in the suspension to be 0.25 mg / ml (the ratio of the amount of the gray-white precipitate in the suspension to the volume of normal hexane), and then Volatilize naturally at room temperature and atmospheric pressure, and self-assemble on the copper grid...

Embodiment 3

[0051] A kind of macroporous-mesoporous-microporous zinc oxide material, its preparation method comprises the following steps:

[0052] 1) Weigh 0.198g of zinc acetylacetonate and add it to 4g of oleylamine, stir for 15min to obtain a translucent solution;

[0053] 2) Heat the translucent solution obtained in step 1) to 150°C for constant temperature reaction for 60 minutes, condense and reflux during the reaction, then cool naturally to obtain a grayish white precipitate; then wash 3 times with ethanol on the centrifuge (centrifugal speed is 3000r / min) to wash;

[0054] 3) Dispersing the gray-white precipitate obtained in step 2) in normal hexane to obtain a suspension, controlling the concentration of the gray-white precipitate in the suspension to be 0.25 mg / ml (the ratio of the amount of the gray-white precipitate in the suspension to the volume of normal hexane), and then Under the environment of room temperature and atmospheric pressure, self-assembly is induced by natura...

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Abstract

The invention discloses a macroporous-mesoporous-microporous zinc oxide material. The macroporous-mesoporous-microporous zinc oxide material is a thin-film material formed by assembly of zinc oxide nanoparticles 25-30 nm in particle size and 100-2000 nm in thickness. The macroporous-mesoporous-microporous zinc oxide material is characterized in that the micropore size is 0.5-2 nm, mesopore size is 2-50 nm and the macropore size is 50-200 nm. A nanoparticle synthesis and self-assembly method is adopted, is mild in reaction conditions, energy saving and free of pollutant discharge, and can be used for preparing nano-porous zinc oxide materials at the normal temperature and at the barometric pressure; the performance of the macroporous-mesoporous-microporous zinc oxide material is substantially improved in the fields of photocatalysis, gas sensitivity and lithium batteries as compared with that of a traditional material, thereby being suitable for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of chemical preparation of inorganic materials, and in particular relates to a macroporous-mesoporous-microporous zinc oxide material and its preparation method and application. Background technique [0002] As we all know, ZnO is an advanced multifunctional material with important applications in pressure, fluorescence, solar energy, photocatalysis, and gas sensing, and has broad application prospects in the fields of energy and environmental processes. However, when ZnO nanomaterials are used in some fields, the actual performance is not very satisfactory. At present, people mainly improve the performance of ZnO by adjusting its surface properties, internal structure, size and morphology. How to efficiently circulate and diffuse active species in the structure of ZnO nanomaterials is a fundamental problem when it comes to applications involving chemical reactions. ZnO structures such as nanowires, nanoro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G9/02G01N27/12B82Y40/00H01M4/48H01M10/0525B01J23/06
CPCH01M4/48H01M10/0525G01N27/12C01G9/02B01J23/06C01P2002/72C01P2004/03C01P2004/04C01P2004/64C01P2006/17C01P2006/16B01J35/39Y02E60/10
Inventor 李昱郑先锋沈国芳王超苏宝连
Owner WUHAN UNIV OF TECH
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