Novel ti-supported lead dioxide electric pole and preparation method thereof

A lead dioxide, titanium-based technology, used in chemical instruments and methods, adsorption water/sewage treatment, water/sewage treatment, etc., can solve the problem of large internal stress in the sedimentary layer, easy peeling, and poor bonding between the PbO sedimentary layer and the substrate. and other problems, to achieve the effect of low operation management requirements, long electrode life and small internal stress

Inactive Publication Date: 2009-04-29
BEIJING NORMAL UNIVERSITY
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AI Technical Summary

Problems solved by technology

At present, PbO exists in titanium-based lead dioxide electrodes during use 2 The deposition layer is not tightly combined with the substrate, PbO 2 Problems such as large internal stress and easy peeling of the deposited layer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0017] A novel titanium-based lead dioxide electrode, the preparation method is as follows: the 15cm 2 The titanium plate was put into 10% oxalic acid solution, etched for 2h under the condition of slight boiling, and the surface was cleaned with deionized water after taking it out; 4 ·5H 2 O, 130mmol / L SbCl 3 , 10mL 36-38wt% concentrated hydrochloric acid, 40mL n-butanol) to coat the surface of the titanium substrate, and after drying naturally, dry at 120°C for 15 minutes. Under pyrolysis for 2 hours, cool down to room temperature naturally, repeat coating, drying and pyrolysis 4 times according to the above steps; then use it as anode, titanium plate as cathode, and dissolve 0.11mol / LPbO and 140g / L hydrogen in 100mL Electrodeposition of α-PbO in Sodium Oxide Electroplating Solution (A) 2 For the middle layer, the deposition time is 1 hour, the deposition temperature is 40°C, and the anode current density of electrodeposition is 10mA / cm 2 ; After washing away the floatin...

example 2

[0020] Electrode preparation method is as example 1, difference is that electroplating solution (B) is that 100mL is mixed with 5g / L chitosan and 0.004mol / L bismuth nitrate, 0.5mol / L Pb(NO 3 ) 2 , 0.1mol / L nitric acid, 0.02mol / L KF.

[0021] Adopt this electrode as the 2,4-dichlorophenol method in anodic oxidation water as example 1, difference is that 2,4-dichlorophenol solution volume is 100mL, after reaction carries out 120min, 2,4-dichlorophenol concentration is 0.5mg / L, the removal rate reaches 99.4%.

example 3

[0023] The electrode preparation method is as in Example 1, except that the electroplating solution (B) is 100mL mixed with 5g / L powdered activated carbon and 0.004mol / L lanthanum nitrate, 0.5mol / L Pb(NO3)2, 0.1mol / L nitric acid, 0.005 mol / L KF.

[0024]Adopt this electrode as the 2,4-dichlorophenol method in anodic oxidation water as example 1, difference is that 2,4-dichlorophenol solution volume is 100mL, after reaction carries out 120min, 2,4-dichlorophenol concentration is 0.4mg / L, the removal rate is 99.6%.

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Abstract

The invention relates to a novel titanium substrate lead dioxide electrode and a preparation method thereof, which belong to the field of water treatment technology application. The titanium substrate lead dioxide electrode adopts titanium material as a carrier; after the titanium substrate undergoes acid etching, pyrolytic process is adopted to plate a tin-stibium oxide bottom layer; alkaline solution is then used for electroplating an alpha-PbO2 intermediate layer; acidic composite electroplating solution is used for preparing a fluorine-containing beta-PbO2 surface layer doped with an active metal (such as bismuth, nickel, lanthanum, cerium and erbium) and a particle with high absorption performance (such as powdered activated carbon and chitosan), thus obtaining a novel titanium substrate lead dioxide electrode. The titanium substrate lead dioxide electrode prepared by the method has low cost and long service life. Using the electrode as an anode and applying certain applied voltage can realize efficient removal and mineralization to the organic contaminants in the water. With simple operation and convenient management, the method is applicable to small-scale and dispersible wastewater and feed water treatment.

Description

technical field [0001] The invention relates to a novel titanium-based lead dioxide electrode and a preparation method thereof, and it is used to efficiently remove organic pollutants in water, specifically a high-adsorption performance particle (such as powdered activated carbon or chitosan) and a The fluorine-containing titanium-based lead dioxide electrode modified by active metals (such as bismuth, nickel, lanthanum, cerium, and erbium) can efficiently oxidize organic pollutants in water when energized, and belongs to the application field of water treatment technology. Background technique [0002] PbO 2 Good conductivity like metal, titanium based PbO 2 When the electrode is electrolyzed in aqueous solution, it has the characteristics of high oxygen evolution potential, strong oxidation ability, good corrosion resistance, good conductivity, and can pass high current. Compared with platinum electrodes, platinum-plated electrodes or other noble metal electrodes, the el...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F1/28
Inventor 王颖杨志峰李阳裴元生
Owner BEIJING NORMAL UNIVERSITY
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