Method for preparing flake porous ZnO nano powder

A nano-powder and sheet-like technology, which is applied in the field of ZnO nano-powder preparation, can solve the problems of difficult industrialized mass production, low yield, and high cost, and achieve stable sensitivity, high crystallinity, and low equipment requirements. Effect

Inactive Publication Date: 2010-07-28
ANHUI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Because these preparation methods are all too complicated, the cost is high, and the yield is low, it is difficult to realize the industrialized mass production of products.

Method used

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  • Method for preparing flake porous ZnO nano powder
  • Method for preparing flake porous ZnO nano powder
  • Method for preparing flake porous ZnO nano powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Zinc nitrate hexahydrate raw material is dissolved in water, the zinc nitrate solution of preparation 0.1M, get this zinc nitrate solution 50ml in the flask, under magnetic stirring, drip ammoniacal liquor (concentration is 25wt%), adjust the pH of solution It is about 6.5, and the mixture is obtained.

[0038] (2) Put the turbid liquid flask obtained in step (1) at a temperature of 10° C., and let it stand for reaction for 2 hours to obtain a turbid liquid.

[0039] (3) Filter, wash and dry the turbid solution obtained in step (2) to obtain a basic zinc nitrate precursor.

[0040] (4) The basic zinc nitrate precursor obtained in the step (3) is placed in a muffle furnace at 450° C. for 2 h and roasted to obtain a porous ZnO nanopowder.

Embodiment 2

[0042] (1) Dissolve the zinc nitrate hexahydrate raw material in water, prepare the zinc nitrate solution of 0.3M, get the zinc nitrate solution 50ml in the flask, under magnetic stirring, add ammoniacal liquor (concentration is 25wt%) dropwise, adjust the pH of the solution It is about 7.0, and a mixed solution is obtained.

[0043] (2) The flask of the cloudy solution obtained in step (1) was reacted for 3 hours under magnetic stirring at a temperature of 25° C. and a rotation speed of 50 rpm to obtain a cloudy solution.

[0044] (3) Filter, wash and dry the turbid solution obtained in step (2) to obtain a basic zinc nitrate precursor.

[0045] (4) The basic zinc nitrate precursor obtained in the step (3) is placed in a muffle furnace at 400° C. for 2 h and calcined to obtain a porous ZnO nanometer powder.

Embodiment 3

[0047] (1) Dissolve the zinc nitrate hexahydrate raw material in water, prepare the zinc nitrate solution of 0.5M, get the zinc nitrate solution 50ml in the flask, under magnetic stirring, add ammoniacal liquor (concentration is 25wt%) dropwise, adjust the pH of the solution It is about 7.0, and a mixed solution is obtained.

[0048] (2) The flask of the cloudy solution obtained in step (1) was reacted for 1 hour under magnetic stirring at a temperature of 50° C. and a rotation speed of 80 rpm to obtain a cloudy solution.

[0049] (3) Filter, wash and dry the turbid solution obtained in step (2) to obtain a basic zinc nitrate precursor.

[0050] (4) The basic zinc nitrate precursor obtained in the step (3) is placed in a muffle furnace at 400° C. for 2 h and calcined to obtain a porous ZnO nanometer powder.

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Abstract

The invention relates to a method for preparing flake porous ZnO nano powder, which comprises the following steps: adding ammonia into solution of zinc nitrate dropwise, and adjusting the pH of the solution to between 6 and 8; under the condition of stirring by magnetic force at the rotating speed of 0 to 180r/m, performing reaction at the temperature of between 0 and 80DEG C for 0.5 to 3 hours; separating, washing and drying the obtained cloudy solution to obtain a crosslinked flake and dispersed flake basic zinc nitrate precursor; and calcinating the basic zinc nitrate precursor with the two appearances at the temperature of between 220 and 500DEG C for 0.5 and 3 hours to obtain the flake porous ZnO nano powder. The nano ZnO product prepared by the method is white powder, belongs to a hexagonal system, has large specific surface area, high purity and good product quality, and responds to gas such as ethanol and acetone sensitively.

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 optoelectronics, piezoelectricity, 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, nanosheets and ZnO with other morphology. [0003] At present, although the synthesis of ZnO nanopowders has achieved m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G9/02
Inventor 黄家锐吴有洁谷翠萍
Owner ANHUI NORMAL UNIV
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