Electrode modified method for increasing degradation efficiency of PbO2 electrode

An electrode modification and electrode technology, which is applied in the direction of electrodes, electrolytic components, electrolytic processes, etc., can solve the problems of inability to expand the range of visible light, reduce the conductivity of electrodes, and unfavorable electrode performance, and achieve wide application, easy implementation, and simple preparation methods Effect

Inactive Publication Date: 2007-10-24
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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Problems solved by technology

However, this method still has the problem of low degradation efficiency, and must use ultraviolet light source to achieve higher efficiency, which cannot be extended to the visible light range
At the same time, a single photocatalytic material TiO 2 Participate in the preparation of modified PbO 2 The electrode may reduce the conductivity of the electrode, which is not conducive to the performance of the electrode

Method used

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  • Electrode modified method for increasing degradation efficiency of PbO2 electrode

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0015] Example 1. First, according to the above method, 2.0g TiO was added to 200ml electrodeposition solution respectively. 2 , 1.0gTiO 2 and 1.0g MnO 2 , 2.0 g MnO 2 Microparticle Modified PbO 2 electrode to investigate TiO 2 In the presence of other photocatalysts such as MnO 2 Etc TiO 2 Promotion of photodegradation efficiency.

[0016] The measurement device is a semi-cylindrical quartz reactor, which will simultaneously fix TiO 2 The photoanode modified with other photocatalysts is fixed at 5mm on the flat side of the reactor, and the 8w ultraviolet lamp with a dominant wavelength of 254nm is fixed at a distance of 20mm from the quartz reactor. Table 1 shows the comparison results of several electrodes treated with 50 mg / L azo dye Acid Orange II solution for 120 minutes under an applied voltage of 1.5 V (between the photoelectrode and the counter electrode).

[0017] Chromaticity removal comparison when electrodes prepared in Table 1 are used for photodegradation...

example 2

[0019] Example 2, the electrode preparation method is the same as the coating and calcination method, and TiO is prepared 2 and MnO 2 co-modified PbO 2 electrode. It was used to simulate the catalytic degradation of 20 mg / L azo dye Acid Orange II under visible light, and other reaction conditions were the same as in Experimental Example 1. After 2 hours of reaction, the decolorization rate reaches 19.7%. If 1.5V voltage is applied between the cathode and anode, the decolorization rate reaches 35.2% after 2 hours of reaction.

example 3

[0020] Example 3, the electrode preparation method is the same as in Experimental Example 1, and a separate TiO 2 Modified PbO 2 Electrodes and TiO 2 and MnO 2 co-modified PbO 2 Electrode, used to degrade 50mg / L azo dye Acid Orange II, the supporting electrolyte is 0.01mol / L Na 2 SO 4 , a voltage of 4.0V was applied between the cathode and the anode, and other reaction conditions were the same as in Experimental Example 1. with TiO alone 2 Modified PbO 2 For electrodes, the TOC removal rate reaches 47.3% after 2 hours of reaction, and TiO 2 and MnO 2 co-modified PbO 2 The removal rate of TOC reached 56.6%.

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Abstract

The invention discloses a modifying method of electrode and application in the water disposal to improve PbO2 electrode degrading efficiency modified by TiO2 in the applying domain of water disposing technique, which is characterized by the following: adding particle to improve optical catalytic activity of electrode such as MnO2 or manganese salt; obtaining TiO2 and co-modified PbO2 electrode with other modifying materials; exerting external pressure to remove and mineralize organic pollution effectively.

Description

field of invention [0001] The present invention relates to a kind of improving PbO 2 Electrode modification method for electrode degradation efficiency, and use it to efficiently remove organic pollutants in water, especially in the preparation of TiO 2 Modified PbO 2 Particles such as MnO that can promote the photocatalytic activity of the electrode are added to the electrode 2 Or the corresponding manganese salt and other components to obtain other components and TiO 2 co-modified PbO 2 photoelectrode. Then, the photoelectrode is used for photocatalytic oxidation or electrocatalytic oxidation to degrade organic pollutants in water, or comprehensively utilizes photocatalysis and electrocatalysis, and belongs to the application field of water treatment technology. Background of the invention [0002] When electrocatalytic oxidation technology is used to remove organic pollutants that are difficult to degrade biochemically, a large amount of quinones are often produced i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/06C25B11/16C02F1/461C02F1/30
CPCY02W10/37
Inventor 曲久辉李国亭刘海宁刘会娟雷鹏举刘锐平
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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