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Method for preparing two-phase porous lead dioxide composite electrode

A technology of lead dioxide and composite electrodes, which is applied in the direction of electrochemical water/sewage treatment, etc., can solve the problems of unstable electrode performance, low efficiency of wastewater treatment, difficult electrode control, etc., to achieve easy implementation, avoid passivation problems, The effect of enhanced catalytic activity

Active Publication Date: 2011-09-07
江苏宇益环保工程设备有限公司
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Problems solved by technology

[0005] In order to overcome the deficiencies in the prior art, the object of the present invention is to provide a preparation method of a two-phase porous lead dioxide composite electrode, so as to solve the difficulty in controlling the electrode operation, insufficient stability of the electrode performance, and the problem of treating printing and dyeing wastewater in the prior art. The problem of insufficient wastewater efficiency

Method used

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Embodiment Construction

[0021] The first step, the preparation of lead powder:

[0022] The lead ingots are first made into lead balls or lead weights, put into a ball mill for grinding, and oxidized into lead powder by blasting.

[0023] The second step, the preparation of the two-phase porous lead dioxide electrode:

[0024] First add distilled water to the above-mentioned prepared lead powder, then add sulfuric acid solution with a density of 1.14g / L, and adjust to a viscous shape, wherein the ratio of lead powder, water and sulfuric acid is 100g: 5mL: 10mL; the paste Smear it on a lead-calcium alloy net with an area of ​​3cm×3cm, compact, dry, and electrochemically oxidize to obtain a two-phase porous lead dioxide electrode.

[0025] The third step, pretreatment of activated carbon fiber felt:

[0026] The activated carbon fiber felt has been washed with alkali (with 1:1 ammonia water), acid washed (with 1:1 HNO 3 or HCl), boiling (boiling in distilled water for 2 hours) and other pretreatment...

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Abstract

The invention discloses a method for preparing a two-phase porous lead dioxide composite electrode, which comprises the following steps of: shearing preprocessed active carbon fibrofelt to have a size which is the same as that of the two-phase porous lead dioxide electrode; and bonding the fibrofelt on the two-phase porous lead dioxide electrode prepared on both sides of a lead calcium alloy net which is subjected to compacting, drying and electrochemical oxidizing and of which the surface is coated with paste lead powder by using conducting glue to obtain the two-phase porous lead dioxide composite electrode. In the method, the active carbon fibrofelt is introduced, and the high adsorbability of the active carbon fibrofelt and the high catalytic activity of the lead dioxide powder porouselectrode are combined to realize the synergistic effect of gathering-electro-catalytic oxidation, enhance the catalytic activity and improve oxidizability. In addition, the active carbon fibrofelt has excellent electrical conductivity, so energy consumption for wastewater treatment is reduced, and the method for preparing the lead dioxide electrode is easy to operate, stable in the performance of the electrode and high in efficiency of wastewater treatment.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a preparation method of a two-phase porous lead dioxide composite electrode. Background technique [0002] Printing and dyeing wastewater has the characteristics of high concentration of organic matter, high chroma, complex composition, and poor biodegradability, and there are more and more varieties of modern dyes, and they are developing in the direction of anti-photolysis, anti-oxidation, and anti-biodegradation, making printing and dyeing wastewater treatment The difficulty is increasing, so printing and dyeing wastewater has always been the focus and difficulty in industrial wastewater treatment. At present, there is no universal governance technology, and its governance problem is still a worldwide problem. Although the electrochemical method has many advantages, it is still limited by electrode materials, high energy consumption and other factors in the treat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/46
Inventor 魏杰王东田黄勇郭新艳
Owner 江苏宇益环保工程设备有限公司
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