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Low-temperature hydrothermal method for manufacturing zinc oxide nanocrystalline whisker

A zinc oxide nanocrystal, low temperature technology, applied in chemical instruments and methods, zinc oxide/zinc hydroxide, single crystal growth and other directions, can solve the problems of high cost, complex technology and process, and achieve low cost, simple operation, The effect of eliminating high temperature sintering and ball milling processes

Inactive Publication Date: 2010-02-24
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the equipment, technology and process of these preparation methods are complex and costly

Method used

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  • Low-temperature hydrothermal method for manufacturing zinc oxide nanocrystalline whisker
  • Low-temperature hydrothermal method for manufacturing zinc oxide nanocrystalline whisker

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] 1) Weigh an appropriate amount of Zn(CH 3 COO) 2 2H 2 O and NaOH, in molar ratio [OH - ]:[Zn] is 11:1 to prepare uniform Zn(OH) 4 2- aqueous solution;

[0016] 2) Add 10ml of Zn(OH) 4 2- Add the aqueous solution to 65ml of glycerin and water in a composite solvent with a volume ratio of 13:5, then add 2g / L polyacrylamide, heat and magnetically stir at 90°C until completely dissolved, and continue ultrasonic oscillation for 30min;

[0017] 3) Place the solution prepared in step 2) in a polytetrafluoroethylene-lined autoclave, seal it, and react at 180°C for 20 hours. After the reaction is completed, cool to room temperature, centrifuge and wash repeatedly with deionized water, and then heat the solution at 90°C. Dry under vacuum for 5 h. Zinc oxide nano whiskers were obtained. Nanowhisker structure see figure 1 with figure 2 shown.

Embodiment 2

[0019] 1) Weigh an appropriate amount of Zn(NO 3 ) 2 and NaOH, in molar ratio [OH - ]:[Zn] is 10:1 to prepare uniform Zn(OH) 4 2- aqueous solution;

[0020] 2) Add 10ml of Zn(OH) 4 2- Add the aqueous solution to 70ml of glycerin and water in a composite solvent with a volume ratio of 13:5, then add 3g / L polyacrylamide, heat and magnetically stir at 90°C until completely dissolved, and continue ultrasonic oscillation for 30min;

[0021] 3) Place the solution prepared in step 2) in a polytetrafluoroethylene-lined autoclave, seal it, and react at 190°C for 18 hours. After the reaction is completed, cool to room temperature, centrifuge and wash repeatedly with deionized water, and then heat the solution at 90°C. Dry under vacuum for 5 hours to obtain zinc oxide nano whiskers.

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Abstract

The invention discloses a low temperature water heating preparing method of zinc oxide nanometer whisker, and the steps are as follows: 1) Zn salt and alkali are prepared into uniform Zn(OH)4<2-> water solution; 2) the Zn(OH)4<2-> water solution is added into the mixed solvent of glycerol and water, and then polyacrylamide is added into the solvent, and the solvent is heated and magnetically stirred at 80 to 100 DEG C until the matter is dissolved completely, then the mixture is put in a high-pressure reactor and sealed; the reaction is done at 170 to 190 DEG C, and after the reaction is finished, the obtained matter is cooled to the room temperature, and then the product is washed repeatedly by de-ionized water and is done with vacuum drying at 80 to 100 DEG C. The preparing method of theinvention has the advantages of simple operation, low cost, removing the processes of high temperature sintering and ball milling, saving energy, being beneficial to environmental protection and avoiding powder hard agglomeration, impurity and structural defect.

Description

technical field [0001] The invention relates to a preparation method of zinc oxide nano whiskers, belonging to the technical field of functional ceramic materials. Background technique [0002] ZnO is an important wide-bandgap direct bandgap (E g =3.37eV) semiconductor material with a hexagonal wurtzite crystal structure. The quantum size effect, small size effect, surface effect and interface effect of zinc oxide nano whiskers make it have excellent electrical, optical, mechanical, photocatalytic and sensing properties, and it is a semiconductor material with important application value. Zinc oxide nano whiskers can be widely used in rubber additives, gas sensors, ultraviolet shielding materials, transformers and the like. Since zinc oxide nano whiskers have an exciton binding energy as high as 60meV at room temperature, they can be used to make short-wavelength optoelectronic devices, such as light-emitting diodes, ultraviolet light detectors, high-frequency filters and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/16C30B29/62C30B7/10C01G9/02
Inventor 钟敏葛洪良王瀚
Owner CHINA JILIANG UNIV
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