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Method for preparing sheet porous structural ZnO nano powder

A technology of porous structure and nanopowder, which is applied in the direction of nanostructure manufacturing, nanotechnology, nanotechnology, etc., can solve the problems that the synthesis of nano-ZnO with two-dimensional porous structure has not been reported in the literature, and achieve non-degeneration, low cost, and relatively low cost. The effect of large surface area

Inactive Publication Date: 2008-05-14
SHANDONG UNIV
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  • Application Information

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Problems solved by technology

[0006] So far, the synthesis of nano-ZnO with two-dimensional porous structure has not been reported in the literature

Method used

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  • Method for preparing sheet porous structural ZnO nano powder

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Experimental program
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Effect test

Embodiment 1

[0030] (1) Dissolve the zinc acetate dihydrate raw material in water to prepare a 0.1M zinc acetate solution, take 25mL of the zinc acetate solution in a flask, and add 25mL of a 0.2M urea solution dropwise under magnetic stirring to obtain a mixed solution.

[0031] (2) Place the flask of the mixed solution obtained in step (1) in a microwave oven, react at a power of 650W for 45min, and the reaction temperature is 75°C to obtain a cloudy solution.

[0032] (3) The turbid liquid obtained in step (2) is filtered, washed, and dried to obtain a basic zinc carbonate precursor.

[0033] (4) The basic zinc carbonate precursor obtained in step (3) was placed in a muffle furnace at 450° C. for 2 h and calcined to obtain sheet-like porous ZnO nanopowder.

Embodiment 2

[0035] (1) Dissolve the zinc acetate dihydrate raw material in water to prepare a 0.3M zinc acetate solution, take 25mL of the zinc acetate solution in a flask, and add 25mL of a 0.4M urea solution dropwise under magnetic stirring to obtain a mixed solution.

[0036] (2) Place the flask of the mixed solution obtained in step (1) in a microwave oven, and react for 30 minutes at a power of 800W at a reaction temperature of 70° C. to obtain a cloudy solution.

[0037] (3) The turbid liquid obtained in step (2) is filtered, washed, and dried to obtain a basic zinc carbonate precursor.

[0038] (4) The basic zinc carbonate precursor in step (3) was placed in a muffle furnace at 500° C. for 2 h and calcined to obtain sheet-like porous ZnO nanopowder.

Embodiment 3

[0040] (1) Dissolve the zinc acetate dihydrate raw material in water to prepare a 0.5M zinc acetate solution, take 25mL of the zinc acetate solution in a flask, and add 30mL of a 0.6M urea solution dropwise under magnetic stirring to obtain a mixed solution.

[0041] (2) Place the flask of the mixed solution obtained in step (1) in a microwave oven, react for 30 minutes at a power of 850W, and the reaction temperature is 80° C. to obtain a cloudy solution.

[0042] (3) The turbid liquid obtained in step (2) is filtered, washed, and dried to obtain a basic zinc carbonate precursor.

[0043] (4) The basic zinc carbonate precursor in step (3) was placed in a muffle furnace at 550° C. for 2 h and calcined to obtain sheet-like porous ZnO nanopowder.

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Abstract

The invention relates to a preparation method of a ZnO nanometer powder with a flaky and vesicular structure, comprising the following steps: firstly, to place a liquid mixture of a zinc acetate solution and a carbamide solution into a microwave oven to react 30 to 60 minutes under temperature of 60 to 95 DEG C and power of 500 to 900W; secondly, separation, to scour and dry the turbid solution to obtain a precursor of basic zinc carbonate; thirdly, to roast the precursor of basic zinc carbonate 1.5 to 3 hours at a temperature of 400 to 600 DEG C to obtain the vesicular ZnO nanometer powder. The invention is characterized in that the prepared ZnO powder is white and belongs to the hexagonal system. The product by the preparation method has the advantages of high rate of specific surface area, high purity and good quality.

Description

technical field [0001] The invention relates to a method for preparing inorganic nanometer materials, in particular to a method for preparing ZnO nanometer powder with sheet-like porous structure. Background technique [0002] Nano-zinc oxide (ZnO) is a typical wide bandgap semiconductor material with a large bandgap of 3.37eV and a large exciton binding energy of 60meV. It has a wide range of applications in the fields of piezoelectricity, optoelectronics, ferromagnetism, sensors and transparent electrodes. It has become one of the current research hotspots worldwide. Since these unique properties of nano-ZnO strongly depend on their morphology and size, the synthesis of nano-ZnO with different morphological structures has aroused great interest of researchers. According to literature reports, nanoparticles, nanorods, nanowires, nanotubes, nanoribbons and other morphology have been prepared by hydrothermal method, sol-gel method, template method, chemical precipitation met...

Claims

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Application Information

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IPC IPC(8): C01G9/02B82B3/00
Inventor 占金华景志红
Owner SHANDONG UNIV
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