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Method for producing ZnO nano-rods and micro-rods in mass

A nano-rod and micro-rod technology, applied in the direction of zinc oxide/zinc hydroxide, can solve the problems of poor controllability, complex process, low yield, etc., and achieve the effects of low cost, simple process and high yield

Inactive Publication Date: 2010-02-10
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, all the methods mentioned above have the disadvantages of poor controllability, high cost, complicated process and low yield.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Weigh 21.9g of zinc acetate with two crystal waters and dissolve it in 200ml of deionized water (0.5M), and dissolve 20ml of ammonia water in 500ml of deionized water (1M). At around 45°C, the Zn(CH 3 COO) 2 Ammonia water was added dropwise into the solution while stirring. When PH=8, the dropwise addition was stopped, and the solution was continued to be stirred. After 20 minutes, the solution began to be in a gel state. Wash with deionized water and suction filter to pH=7. Then put it into a constant temperature and humidity box (SPX-250), set the temperature to 25° C., the humidity to 90% RH, and the time to 24 hours.

[0021] The dried powder was heat-treated at 200° C. for 3 hours to obtain a total of 7 grams of ZnO nanorods with a length of 150-200 nm and a diameter of 50 nm.

Embodiment 2

[0023] Weigh 21.9g of zinc acetate with two crystal waters and dissolve it in 200ml of deionized water (0.5M), and dissolve 20ml of ammonia water in 500ml of deionized water (1M). At around 45°C, the Zn(CH 3 COO) 2 Ammonia water was added dropwise into the solution while stirring. When PH=8, the dropwise addition was stopped, and the solution was continued to be stirred. After 20 minutes, the solution began to be in a gel state. Wash with deionized water and suction filter to pH=7. Then put it into a constant temperature and humidity box (SPX-250), set the temperature to 25° C., the humidity to 90% RH, and the time to 72 hours.

[0024] The dried powder was heat-treated at 200° C. for 3 hours to obtain a total of 7 grams of ZnO nanorods with a length of 200-500 nm and a diameter of 100 nm.

Embodiment 3

[0026] Weigh 21.9g of zinc acetate with two crystal waters and dissolve it in 200ml of deionized water (0.5M), and dissolve 20ml of ammonia water in 500ml of deionized water (1M). At around 45°C, the Zn(CH 3 COO) 2 Ammonia water was added dropwise into the solution while stirring. When PH=8, the dropwise addition was stopped, and the solution was continued to be stirred. After 20 minutes, the solution began to be in a gel state. Wash with deionized water and suction filter to pH=7. Then put it into a constant temperature and humidity box (SPX-250), set the temperature to 60° C., the humidity to 90% RH, and the time to 24 hours.

[0027] The dried powder was heat-treated at 200° C. for 3 hours to obtain a total of 7 grams of ZnO microrods with a length of 4 μm and a diameter of 1.5 μm.

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Abstract

The invention provides a method for producing ZnO nano-rods and micro-rods in mass. The method comprises the following steps: firstly, adopting an easy chemical coprecipitation method to prepare ZnO precursors; putting the precursors in a constant-temperature and constant-humidity chamber; and obtaining ZnO nano-rods and micro-rods by controlling temperature, humidity and time in the constant-temperature and constant-humidity chamber. The method uses the constant-temperature and constant-humidity chamber to obtain the ZnO rod structures in different sizes and has the advantages of high purity,low cost, simple process, good controllability, high yield, mass production suitability, and the like. The invention is characterized in that (1) the nano-rods in different sizes can be obtained by controlling the humidity and the time in the constant-temperature and constant-humidity chamber; and (2) the micro-rods in different sizes can be obtained by controlling the temperature and the time inthe constant-temperature and constant-humidity chamber. The ZnO in the structures can be applied in different aspects, such as detectors, catalysts, sensors, piezoelectric transducers, superficial acoustic fluctuation devices, laser diodes, solar cells, and the like.

Description

(1) Technical field [0001] The invention relates to ZnO preparation technology, in particular to a technology for preparing ZnO nanorods and microrods. (2) Background technology [0002] ZnO is a semiconductor material with direct bandgap and wide bandgap. It has high exciton binding energy, and the existence of excitons can be observed at room temperature, so it has good high temperature resistance and thermal stability. ZnO is a multifunctional material with semiconducting, pyroelectric and piezoelectric properties. It is used in detectors, catalysts, sensors, piezoelectric transducers, surface acoustic wave devices, laser diodes, and solar cells. Among the various morphologies of ZnO, the one-dimensional ZnO rod-like structure has been studied extensively, mainly due to its potential application in optoelectronic nanodevices. People have made efforts to explore various methods to obtain ZnO rod-like structures, such as high-temperature evaporation through template-assist...

Claims

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Application Information

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IPC IPC(8): C01G9/02
Inventor 贾德昌曲秀荣
Owner HARBIN INST OF TECH
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