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Preparation method of three-dimensional porous zinc oxide microstructure

A three-dimensional porous, micro-structured technology, applied in the direction of zinc oxide/zinc hydroxide, nanotechnology, etc., can solve the problem of not being an economical method, and achieve the effect of reducing the preparation cost and the preparation temperature

Inactive Publication Date: 2011-06-01
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The document "ZnO-based hollow microspheres: biopolymer-assisted assemblies from ZnO nanorods. J. Phys. Chem. B 2006, 110: 15847-15852" discloses a method for preparing three-dimensional porous zinc oxide nanomaterials using templates, but this This method requires subsequent high-temperature heat treatment or chemical etching to remove the template, which is not an economical method

Method used

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  • Preparation method of three-dimensional porous zinc oxide microstructure
  • Preparation method of three-dimensional porous zinc oxide microstructure
  • Preparation method of three-dimensional porous zinc oxide microstructure

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Embodiment 1

[0016] Example 1, using high-purity water as a solvent, respectively configure 50 mL of 0.1 mol / L zinc acetate solution and 0.2 mol / L urea solution; drip the prepared zinc acetate solution into the urea solution, and keep stirring during this process; The mixture was stirred and refluxed at 60°C for 1.5h to obtain a white precipitate; the white precipitate was filtered and washed with deionized water and absolute ethanol several times, and then dried in a vacuum oven; the dried white precipitate was placed in an air atmosphere Perform annealing treatment, raise the temperature to 300° C. at a rate of 2° C. / min and hold it for 2 hours to obtain a three-dimensional multilayer porous ZnO microstructure.

[0017] From figure 1 As can be seen in , the precursor has been completely converted to hexagonal wurtzite ZnO, and no diffraction peaks associated with zinc and carbonaceous nanoparticles appear. According to the Shcerer formula, it can be estimated that the size of ZnO nanopa...

Embodiment 2

[0018] Example 2, using high-purity water as a solvent, configure 0.2mol / L zinc acetate and 0.4mol / L urea solution respectively 50mL; drop the prepared zinc acetate solution into the urea solution, and keep stirring during this process; The mixture was stirred and refluxed at 70°C for 2 hours to obtain a white precipitate; the white precipitate was filtered and washed with deionized water and absolute ethanol several times, and then dried in a vacuum oven; the dried white precipitate was annealed in an air atmosphere For treatment, the temperature was raised to 500° C. at a rate of 3° C. / min and kept at a temperature of 3 hours to obtain a three-dimensional multilayer porous ZnO microstructure.

Embodiment 3

[0019] Example 3, using high-purity water as a solvent, respectively configure 50 mL of 0.3 mol / L zinc acetate solution and 0.8 mol / L urea solution; drip the prepared zinc acetate solution into the urea solution, and keep stirring during this process; The mixture was stirred and refluxed at 80°C for 3 hours to obtain a white precipitate; the white precipitate was filtered and washed with deionized water and absolute ethanol several times, and then dried in a vacuum oven; the dried white precipitate was dried in an air atmosphere After annealing, the temperature was raised to 400° C. at a rate of 3° C. / min and kept at a temperature of 4 hours to obtain a three-dimensional multilayer porous ZnO microstructure.

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Abstract

The invention discloses a preparation method of a three-dimensional porous zinc oxide microstructure, solving the technical problem of high reaction temperature in the process of preparing the three-dimensional porous zinc oxide microstructure by using the existing preparation method. The technical scheme is as follows: respectively preparing zinc acetate solution and urea solution by using high-pure water as a solvent; slowly stirring the zinc acetate solution and dropping in the urea solution, stirring and refluxing the mixture to obtain white precipitate; filtering and washing the white precipitate with deionized water and absolute ethyl alcohol, putting the white precipitate in a vacuum oven for drying; and annealing the dried white precipitate at the air atmosphere to obtain the three-dimensional porous zinc oxide microstructure. Because the three-dimensional porous zinc oxide microstructure is prepared by using a method of combing low temperature soft chemistry and subsequent thermal treatment, the preparation temperature of a precursor is reduced. Compared with the prior art, the preparation temperature is reduced from more than 120 DEG C to 70-90 DEG C.

Description

technical field [0001] The invention relates to a preparation method of a zinc oxide microstructure, in particular to a preparation method of a three-dimensional porous zinc oxide microstructure. Background technique [0002] In addition to the unique properties of nanomaterials, three-dimensional porous nanomaterials also endow them with novel applications. Compared with solid nanomaterials, porous materials have a larger active specific surface area, and gases can diffuse freely through the porous structure, so they have good application prospects in the field of gas sensors. [0003] The document "ZnO-based hollow microspheres: biopolymer-assisted assemblies from ZnO nanorods. J. Phys. Chem. B 2006, 110: 15847-15852" discloses a method for preparing three-dimensional porous zinc oxide nanomaterials using templates, but this This method requires subsequent high-temperature heat treatment or chemical etching to remove the template, which is not an economical method. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G9/02B82Y40/00
Inventor 樊慧庆李进
Owner NORTHWESTERN POLYTECHNICAL UNIV
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