Method for preparing high purity nano-cerium dioxide with electrolytic method

A nano-cerium dioxide, high-purity technology, applied in the electrolysis process, electrolysis components, etc., can solve the problems of low product purity, complex process requirements, and difficult control, and achieve low process conditions, simple equipment and process, and prolong The effect of service life

Inactive Publication Date: 2008-09-24
ZHEJIANG NORMAL UNIVERSITY
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  • Abstract
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  • Claims
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Problems solved by technology

[0010] The present invention aims at the deficiencies in the existing methods for preparing cerium oxide such as complex process requirements, difficult control, and low product purity, and provides an electrolytic preparation method with simple production process, low production cost and high product purity. Method for Purifying Nano Ceria

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  • Method for preparing high purity nano-cerium dioxide with electrolytic method

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example 1

[0032] An electrolysis device for preparing high-purity nano-cerium oxide by electrolysis method includes an electrolysis cell 1, an electrode 2, an air inlet pipe 3, an ultrasonic transmitter 4, and an exhaust pipe 5. Among them, the electrolytic cell 1 adopts a glass electrolytic cell. The size is 200mm×100mm×120mm, the ultrasonic transmitter 4 and the air inlet pipe 3 are installed at the bottom of the electrolytic cell 1, and the exhaust pipe 5 is installed on the top of the electrolytic cell 1. 1.2L of electrolyte is injected into the electrolytic cell 1. The electrolyte is 0.1~2.5 mol / L, purity of 99.95% cerium trichloride solution, both anode and cathode electrodes 2 use titanium-based platinum electrodes, the distance between the plates is 18mm, the transmission frequency of the ultrasonic transmitter 4 is 600KHz, and the power is 60W. During electrolysis, the ultrasonic transmitter 4 is turned on, oxygen enters the electrolytic cell 1 through the air inlet pipe 3, and var...

example 2

[0034] An electrolysis device for preparing high-purity nano-cerium oxide by electrolysis method includes an electrolytic cell 1, an electrode 2, an air inlet pipe 3, an ultrasonic transmitter 4, and an exhaust pipe 5. The electrolytic cell 1 adopts a glass electrolytic cell. The size is 200mm×100mm×120mm, the ultrasonic transmitter 4 and the air inlet pipe 3 are installed at the bottom of the electrolytic cell 1, and the exhaust pipe 5 is installed on the top of the electrolytic cell 1. 1.2L of electrolyte is injected into the electrolytic cell 1. The electrolyte is 0.1~2.5 mol / L, purity of 99.95% cerium trichloride solution, both anode and cathode electrodes 2 use titanium-based platinum electrodes, the distance between the plates is 18mm, the transmission frequency of the ultrasonic transmitter 4 is 800KHz, and the power is 200W. During electrolysis, the ultrasonic transmitter 4 is turned on, oxygen enters the electrolytic cell 1 through the air inlet pipe 3, and various gases ...

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Abstract

The invention relates to a method for preparing high purity nano-ceria by an electrolytic method. The invention aims at the defects of the complex technique, the hard control and the low product purity of the existing method to prepare the ceria and provides a method for preparing the high purity nano-ceria by an electrolytic method which has the advantages of simple technique, low cost and high product purity. The technical scheme in preparing the high purity nano-ceria by an electrolytic method of the invention relates to: the bottom part of an electrolytic slot is provided with an ultrasonic emitting device and an air inlet tube; the top part of the electrolytic slot is provided with an air exhaust tube; cerous chloride liquid is adopted as the electrolytic liquid; both an anode and a cathode adopt titanium matrix platinum electrodes. When electrolyzing, an ultrasonic oscillation device is started, oxygen enters into the electrolytic slot through the air inlet tube; the cathode and the anode are mutually changed according to the frequency of one time for one minute during the electrolytic process for one to three hours, then a deposit is obtained, thus being able to prepare nano-ceria powders after pump filtration and drying.

Description

Technical field [0001] The invention relates to a method for preparing cerium oxide, in particular to a method for preparing high-purity nano cerium oxide by electrolysis. technical background [0002] Cerium dioxide is a rare earth material with excellent properties and a wide range of uses. It is mainly used as an additive for absorbing ultraviolet rays, as a polishing powder for polishing glass, silicon wafers and other materials with high-precision requirements; it can also be used in hydrogen storage materials, piezoelectric Ceramics, gasoline catalysts, certain permanent magnet materials, various alloy steels and non-ferrous metals, automobile exhaust gas purifiers, fuel cell electrode catalysts, cemented carbide tool materials additives, etc., have broad market prospects. [0003] Currently, there are several methods for preparing cerium oxide: [0004] 1. Prepare cerium dioxide by adding acid to dissolve it (publication number CN 1683248A) [0005] Dissolve the tetravalen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/00
Inventor 李小忠叶群峰郭婷陈海峰韩伟琴王冬根
Owner ZHEJIANG NORMAL UNIVERSITY
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