Method and device for preparing nanometer indium oxide through electrolysis

A technology for preparing nanometer indium oxide and electrolyte, which is applied in the field of powder material preparation, can solve the problems of a large amount of nitrogen-containing wastewater, difficult to remove halogen elements, and the cost of wastewater treatment increases, and achieves the best specific surface area, small particle size, and high particle size. well shaped effect

Active Publication Date: 2018-04-20
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, difficult-to-remove halogen elements and a large amount of nitrogen-containing wastewater will be produced, and the cost of wastewater treatment will increase.

Method used

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  • Method and device for preparing nanometer indium oxide through electrolysis
  • Method and device for preparing nanometer indium oxide through electrolysis
  • Method and device for preparing nanometer indium oxide through electrolysis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] In Example 1, the length, width and height of the electrolytic tank were 50, 30 and 50 cm respectively, the distance between the cathode and the anode was 5 cm, and a 20-degree slope was designed at the bottom of the electrolytic tank to facilitate the collection and circulation of products. There are holes on the bottom and sides of the tank, and the function of the circulation pump is used to realize the circulation of the electrolyte and prevent the accumulation of indium hydroxide particles.

[0049] The concentration of the electrolyte is set to 2mol / L, the pH value of the electrolyte is adjusted to 4.8, the temperature of the electrolyte is maintained at about 25°C, and the current density of the electrolyte is set to 15A / dm 2 , when the concentration of the electrolysis product is 10%, the electrolysis is stopped, the indium hydroxide powder generated by electrolysis is collected, and the indium oxide powder is obtained through subsequent drying and calcination. ...

Embodiment 2

[0053] In Embodiment 2, the device of the electrolytic cell is exactly the same as that in Embodiment 1, except that relevant electrolysis process parameters are adjusted accordingly.

[0054] The concentration of the electrolyte is set to 1mol / L, the pH of the electrolyte is adjusted to 4.8, the temperature of the electrolyte is maintained at about 25°C, and the current density of the electrolyte is set to 15A / dm 2 , when the concentration of the electrolysis product is 10%, the electrolysis is stopped, the indium hydroxide powder generated by electrolysis is collected, and the indium oxide powder is obtained through subsequent drying and calcination.

[0055] The indium oxide powder prepared above was tested, and the results are shown in Table 2.

[0056] The performance test result of the indium oxide powder that table 2 embodiment 2 prepares

[0057] Measurement items

Embodiment 3

[0059] In Embodiment 3, the device of the electrolytic cell is exactly the same as that in Embodiment 1, except that relevant electrolysis process parameters are adjusted accordingly.

[0060] The concentration of the electrolyte is set to 0.5mol / L, the pH value of the electrolyte is adjusted to 4.8, the temperature of the electrolyte is maintained at about 25°C, and the current density of the electrolyte is set to 15A / dm 2 , when the concentration of the electrolysis product is 10%, the electrolysis is stopped, the indium hydroxide powder generated by electrolysis is collected, and the indium oxide powder is obtained through subsequent drying and calcination.

[0061] The indium oxide powder prepared above was tested, and the results are shown in Table 3.

[0062] The performance test result of the indium oxide powder that table 3 embodiment 3 prepares

[0063] Measurement items

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Abstract

The invention discloses a method and a device for preparing nanometer indium oxide through electrolysis. The method comprises the step of preparing indium hydroxide from an ammonium nitrate and ammonium polyacrylate mixed solution as an electrolyte, wherein a plurality of positive electrodes made of high-purity metal indium are adopted, a plurality of negative electrodes made of graphite are adopted, the positive electrodes and the negative electrodes are arranged alternately at intervals, and the electrolysis process is carried out in the existence conditions of ultrasonic waves; and after the indium hydroxide obtained through electrolysis is calcined at high temperature, nanometer indium oxide is obtained. The obtained nanometer indium oxide is high in purity, small in granularity, uniform in grain diameter, narrow in particle size range, good in particle shape and optimal in specific surface area, and a high-density sputtering target material can be prepared from indium oxide powder.

Description

technical field [0001] The invention belongs to the field of powder material preparation, and in particular relates to a method for preparing nanometer indium oxide by electrolysis. Background technique [0002] Indium oxide (In 2 o 3 ) has excellent performance as a semiconductor material, and can be used as a transparent electrode of a solar cell and an electronic material. Especially as the main component raw material of the transparent conductive oxide ITO target (indium tin oxide), it has an important application in the field of flat panel display (FPD). Usually, ammonia water is added to a solution containing indium ions, and the resulting indium hydroxide precipitate is calcined to obtain indium oxide. The particle size of the product prepared by this method is inconsistent, the particle shape is also uneven, and more rod-shaped or needle-shaped powders are obtained. In addition, difficult-to-remove halogen elements and a large amount of nitrogen-containing wastew...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G15/00B82Y40/00C25B1/00
CPCB82Y40/00C01G15/00C01P2004/03C01P2004/51C01P2004/60C01P2006/12C25B1/00
Inventor 孙本双刘洋曾学云舒永春陈杰梁朋
Owner ZHENGZHOU UNIV
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