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Lead dioxide electrode and preparing method thereof

A lead dioxide and electrode technology, applied in the field of electrochemistry, achieves obvious degradation effect, simple preparation process and high electrochemical performance

Inactive Publication Date: 2007-06-06
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, research in this area is limited to PbO prepared by electroplating 2 Electrodes, PbO prepared by other methods 2 Whether the electrode also has high electrochemical activity has not been reported

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1, the lead dioxide powder prepared by the chemical precipitation method is uniformly mixed with the FR002A type polytetrafluoroethylene micropowder (the average particle diameter is 5 microns) provided by Shanghai Sanaifu New Material Co., Ltd. with a mass ratio of 7: 1, and the Press it into a 100mm×30mm rectangular sheet under a pressure of 20MPa. After baking the sheet at 250-300 degrees Celsius for 2 hours, it is used as an electrode. The surface of the electrode is smooth, firm and compact, and its resistance is 50-100Ω. At a voltage of 100V and a current density of 1000A / m 2 Working under conditions, the annual corrosion rate is less than 0.05%. When applied to the electrolytic treatment of dye neutral bordeaux solution, the decolorization rate is about 75% under the condition of 18W external power for 1.5 hours, which is about 1.7 times that of ordinary graphite electrodes under the same conditions; the COD removal rate is about 30%, which is about Tw...

Embodiment 2

[0016] Example 2, commercially available lead dioxide powder and industrial grade polytetrafluoroethylene micropowder (average particle size less than 20 microns) are uniformly mixed with a mass ratio of 0.5:1, and pressed into a 100mm×30mm rectangular sheet under a pressure of 10MPa. The sheet is pre-electrolyzed for 10-24 hours in the target treatment solution neutral bougainvillea solution, and then used as an electrode. The electrode has a smooth surface, high mechanical strength, and a resistance of 2 to 3 kΩ. At a voltage of 100V and a current density of 1000A / m 2 Working under conditions, the annual corrosion rate is less than 0.05%. Under the condition of applied power of 18W, the neutral date red solution was electrolyzed for 1.5 hours, and the decolorization rate was about 70%, about 1.6 times that of ordinary graphite electrodes under the same conditions; the removal rate of COD was about 30%, about that of ordinary graphite electrodes under the same conditions 2 ...

Embodiment 3

[0017] Example 3, the lead dioxide powder prepared by the chemical precipitation method is uniformly mixed with industrial-grade polytetrafluoroethylene micropowder (average particle diameter is less than 100 microns) with a mass ratio of 2.5: 1, and pressed into a 100mm × 30mm rectangular sheet under a pressure of 30MPa . After baking the sheet at 100 degrees Celsius for 3-5 hours, it will be used as an electrode. The surface of the electrode is smooth, the mechanical strength is high, and the resistance is 200-500Ω. At a voltage of 100V and a current density of 1000A / m 2 Working under conditions, the annual corrosion rate is less than 0.05%. When applied to the electrolytic treatment of dye alizarin red solution, the decolorization rate is about 60% under the condition of 18W external power for 1.5 hours, which is about 2 times that of ordinary graphite electrodes under the same conditions; the COD removal rate is about 15%, which is about 1.5 times that of ordinary graph...

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Abstract

The invention belongs to electrochemistry technology field, relates to a lead dioxide electric pole and preparation method thereof. The electric pole is made of lead dioxide powder and poly-4-oxyethylene or polypropylene particles in a certain mass ratio by mixing and pressing them. The invention is a no-basal body preparation method, solves the problem of coating pull-off radically. The electric pole has advantages of high mechanical strength, high corrosion resistance, high electrochemical activity and simple preparation technique.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and in particular relates to a lead dioxide electrode and a preparation method thereof. Background technique [0002] PbO 2 As a kind of insoluble anode material with good performance and low price, the electrode has not only been used in the chemical industry, but also has a good application prospect in the field of environmental protection. [0003] PbO 2 Electrodes can be divided into two types: matrix electrodes and matrix-free electrodes. Conventional matrix-free PbO 2 Electrodes are not suitable for industrial applications due to their poor mechanical strength. The current application is generally the matrix PbO 2 Electrodes, among which titanium-based PbO is more researched 2 electrode. Titanium is a valve-type metal, and it is a good carrier for many electrocatalytic active materials. A layer of conductive and corrosion-resistant PbO is plated on the titanium base. 2 Fina...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B11/16
Inventor 侯惠奇董文博张仁熙徐莺
Owner FUDAN UNIV
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