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Method for preparing high-purity nanometer titanium dioxide by electrolyzing titanium trichloride

A technology of nano-titanium dioxide and electrolytic titanium trichloride, which is applied in the electrolysis process and electrolysis components, etc., can solve the problems of complex process requirements, low product purity, and difficult control, and achieve low process requirements, simple equipment and process flow, The effect of low production cost

Inactive Publication Date: 2012-07-25
ZHEJIANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0014] The present invention aims at the deficiencies in the existing methods for preparing nano-titanium dioxide, such as complex process requirements, difficult control, and low product purity, and provides an electrolytic method with simple production process, low production cost, and high product purity to prepare high-purity titanium dioxide. The method of nano titanium dioxide

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  • Method for preparing high-purity nanometer titanium dioxide by electrolyzing titanium trichloride
  • Method for preparing high-purity nanometer titanium dioxide by electrolyzing titanium trichloride

Examples

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example 1

[0039] The device for preparing high-purity nano-titanium dioxide by electrolysis of titanium trichloride includes electrolytic cell 1, electrolyte solution 2, centrifugal separation device 3, exhaust pipe 4, electrode 5, hydrogen peroxide feed pipe 6 and titanium trichloride feed pipe 7, electrode The anode in 5 is a titanium-based platinum electrode, the cathode in electrode 5 is a graphite electrode, and the electrodes are staggered in a unipolar parallel manner. The electrolytic cell 1 is a glass electrolytic cell with a distance between the plates of 4 mm. The centrifugal separation device 3 includes pipelines 301, The valve 302 and the pump 303, the valve 302 and the pump 303 are connected in series through the pipeline 301, one interface of the centrifugal separation device 3 is connected to the lower part of the electrolytic cell 1, and the other interface of the centrifugal separation device 3 is connected to the upper part of the electrolytic cell 1; Inject 1.2L of ti...

example 2

[0041] The device for preparing high-purity nano-titanium dioxide by electrolysis of titanium trichloride includes electrolytic cell 1, electrolyte solution 2, centrifugal separation device 3, exhaust pipe 4, electrode 5, hydrogen peroxide feed pipe 6 and titanium trichloride feed pipe 7, electrode The anode in 5 is a titanium-based platinum electrode, the cathode in electrode 5 is a graphite electrode, and the electrodes are staggered in a unipolar parallel manner. The electrolytic cell 1 is a glass electrolytic cell with a distance between plates of 6 mm. The centrifugal separation device 3 includes pipelines 301, The valve 302 and the pump 303, the valve 302 and the pump 303 are connected in series through the pipeline 301, one interface of the centrifugal separation device 3 is connected to the lower part of the electrolytic cell 1, and the other interface of the centrifugal separation device 3 is connected to the upper part of the electrolytic cell 1; Inject 1.2L of titani...

example 3

[0043] The device for preparing high-purity nano-titanium dioxide by electrolysis of titanium trichloride includes electrolytic cell 1, electrolyte solution 2, centrifugal separation device 3, exhaust pipe 4, electrode 5, hydrogen peroxide feed pipe 6 and titanium trichloride feed pipe 7, electrode The anode in 5 is a titanium-based platinum electrode, the cathode in electrode 5 is a graphite electrode, and the electrodes are staggered in a unipolar parallel manner. The electrolytic cell 1 is a glass electrolytic cell with a distance between plates of 10mm. The centrifugal separation device 3 includes pipelines 301, The valve 302 and the pump 303, the valve 302 and the pump 303 are connected in series through the pipeline 301, one interface of the centrifugal separation device 3 is connected to the lower part of the electrolytic cell 1, and the other interface of the centrifugal separation device 3 is connected to the upper part of the electrolytic cell 1; Inject 1.2L of titani...

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Abstract

The invention relates to a method for preparing high-purity nanometer titanium dioxide by electrolyzing titanium trichloride. Specific to the defects of complex technological requirement and low purity of products of the present method for preparing nanometer titanium dioxide, the invention provides a method for preparing high-purity nanometer titanium dioxide by adopting electrolysis method with simple production technology and high purity of products. The method provided by the invention is finished in the following manner: a device for preparing the high-purity nanometer titanium dioxide by electrolyzing titanium trichloride comprises an electrolytic tank, electrolyte, an exhaust pipe and an electrode, wherein a titanium-based platinum electrode is adopted as anode; a graphite electrode is adopted as cathode; and a titanium trichloride solution is taken as the electrolyte. During an electrolytic process, the concentration of the titanium trichloride in the electrolyte is kept relatively stable and hydrogen peroxide is continuously added in the electrolytic process. During the electrolytic process, partial electrolyte is extracted and is subjected to centrifugal separation, thereby obtaining precipitate and liquid supernatant; the liquid supernatant is added into the electrolytic tank again and participates in electrolysis; and the precipitate is dried, thereby obtaining the high-purity nanometer titanium dioxide powder.

Description

technical field [0001] The invention relates to a method for preparing titanium dioxide, in particular to a method for preparing high-purity nanometer titanium dioxide by electrolysis. technical background [0002] TiO 2 Due to the advantages of high photocatalytic activity, good stability, non-toxic to human body, and low price, it stands out among many semiconductor photocatalysts. Its application fields have been in the degradation of organic wastewater, the reduction of heavy metal ions, air purification, and sterilization. , anti-fog and many other aspects. Therefore, by controlling the material synthesis conditions, various TiO 2 The preparation mechanism and the development of related advanced production technology, screening out the preparation method suitable for industrial scale-up, so as to obtain high-quality nano-TiO with different properties 2 , has become one of the most active fields in current interdisciplinary research. [0003] At present, domestic and...

Claims

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Application Information

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IPC IPC(8): C25B1/00
Inventor 李小忠郜雪媒吕妍蓝阳丰王漂纯
Owner ZHEJIANG NORMAL UNIVERSITY