Production method for powder porous lead dioxide electrode used for treating organics in water

A technology of lead dioxide and its production method, which is applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve the problems of difficult control of the treatment process, increased electrode production cost and process complexity, and poor conductivity. Achieve the effect of avoiding the passivation of the substrate, good sewage treatment effect, and simple production process

Inactive Publication Date: 2009-10-14
南通金三角石墨制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problems of this electrode preparation process are: 1. The pretreatment process of titanium substrate is difficult to control, and the treatment quality directly affects the subsequent electroplating process
2. Due to the electroplating process, there will inevitably be some grain boundary gaps in the coating. Oxygen generated during electrolysis will pass through the grain boundary gaps to oxidize the substrate to form titanium oxide with poor conductivity and passivate the substrate, resulting in deterioration of electrode performance and affecting PbO 2 Working stability and service life of electrodes
This process increases the electrode manufacturing cost and process complexity, and it is difficult to fundamentally solve the passivation problem of the substrate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The first step, synthesis of PbO 2 :

[0029] Accurately weigh the fully ground Pb(Ac) 2 ·3H 2 O 1mol and NaOH 2mol were placed in an agate mortar and mixed for 10 minutes; then under alkaline conditions, an appropriate amount of fully ground (NH 4 ) 2 S 2 o 8 Mixed with 1.3mol, the moisture absorption of the system gradually changed from orange red to dark brown and viscous, and the reaction continued until the color no longer deepened. The ground sample was placed in a constant temperature water bath at 80°C for 5 hours to make the reaction complete, and the solid phase product was filtered and washed at 80°C to obtain sample A. Take a certain amount of sample A and place it in dilute HNO 3 Acidification treatment at 90°C in the medium for 2 hours, repeated suction filtration and washing until the filtrate was neutral, and drying at 80°C for about 10 hours to obtain the final sample PbO 2 .

[0030] The second step is to prepare the electrode:

[0031] The a...

Embodiment 2

[0042] The first step is to synthesize PbO:

[0043] (a) Prepare 0.05mol / L Pb(NO 3 ) 2 and Na 2 CO 3 solution.

[0044] (b) Measure 250mL of Pb(NO 3 ) 2 The solution was placed in a beaker, and 0.08 g of surfactant sodium dodecylbenzenesulfonate was added.

[0045] (c) 500mLNa 2 CO 3 The solution was added dropwise, stirring while adding. Continue to stir for 30 min after the dropwise addition to complete the reaction, and filter to obtain a milky white precipitate.

[0046] (d) The precipitate was washed several times with distilled water and ethanol in turn, dried at 80°C, and then burned in a muffle furnace at 340°C for 5 hours to obtain white powdery PbO.

[0047] The second step is to prepare the electrode:

[0048] (a) Blend the above-prepared PbO powder with a sulfuric acid solution with a density of 1.14g / L to a viscous state, wherein the ratio of the PbO powder to the sulfuric acid solution is 1000g: 110ml, apply the paste on the lead foil, press After dry...

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Abstract

The invention relates to a production method for a powder porous lead dioxide electrode used for treating organics in water, which comprises the steps of: taking PbO2 powder as raw material, mixing the PbO2 powder into paste with sulfuric acid solution with density of 1.10 to 1.145g / L, coating the paste on lead foil and compacting and drying to obtain a PbO2 powder porous dioxide electrode. PbO powder is taken as raw material, and (a) the PbO powder is produced into paste by mixing with sulfuric acid with density of 1.10 to 1.145g / L, coating the paste on lead foil and compacting and drying are conducted so as to obtain a PbO powder porous dioxide electrode; (b) the electrode is put into sulfuric acid with density rho of 1.02 to 1.08g / cm and taken as the anode; electroanalysis is conducted until the surface of the anode turns dark brown; and (c) the anode is cleaned and dried so as to obtain the PbO2 powder porous dioxide. The production method has the advantages of easily conducted preparation process and electrode produced with stable performance and high wastewater treatment efficiency.

Description

technical field [0001] The invention relates to a method for manufacturing a lead dioxide electrode used for organic waste water treatment. Background technique [0002] Phenolic wastewater is a very harmful industrial wastewater, which can be toxic to all organisms. Wastewater containing phenol or other aromatic organics that are difficult to biodegrade has a large amount of treatment, involves a wide range of areas, and is difficult to treat. It has become a serious social problem. Effective treatment of organic wastewater is an important research topic in wastewater treatment. Electrochemical oxidation treatment of organic wastewater does not consume or rarely consumes chemical reagents, does not cause secondary pollution, and is easy to operate and control. It is a good water treatment method for treating low-concentration organic wastewater that is difficult to biodegrade. [0003] At present, this method mainly has problems such as poor electrode stability, short elec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F1/58C02F101/34
Inventor 魏杰王东田柳东东
Owner 南通金三角石墨制造有限公司
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