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Method for preparing powdery porous manganese dioxide electrode

A manganese dioxide electrode, electrolytic manganese dioxide technology, applied in the direction of electrode, electrode shape/type, electrolysis process, etc., can solve the problems of low wastewater treatment efficiency and unstable electrode performance, and achieve easy implementation and improved catalytic activity. , the effect of strong adsorption capacity

Inactive Publication Date: 2011-08-24
SUZHOU UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] In order to overcome the deficiencies in the prior art, the purpose of the present invention is to provide a method for preparing a powder porous manganese dioxide electrode to solve the problems in the prior art that the performance of the electrode for treating printing and dyeing wastewater is not stable enough and the efficiency of treating wastewater is not high

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  • Method for preparing powdery porous manganese dioxide electrode

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Embodiment 1

[0016] The first step, the preparation of electrolytic manganese dioxide:

[0017] The electrolyte is manganese sulfate solution, the mass concentration of manganese sulfate is 135g / L, the pH value is 3.9, the temperature of the electrolyte is 90°C, the titanium alloy is used as the anode, the carbon electrode is used as the cathode, and the current density is 10mA / cm 2 , The deposit obtained from the anode is washed, neutralized, ground and dried to obtain electrolytic manganese dioxide.

[0018] The second step, the preparation of powder porous manganese dioxide electrode:

[0019] Dry mix electrolytic manganese dioxide and expanded graphite evenly, the mass ratio of the two is 80:20, then add the binder (sodium carboxymethyl cellulose aqueous solution) drop by drop, stir until a paste-like object is formed, and the paste The body is smeared on both sides of a 3cm×3cm titanium mesh, compacted and dried to obtain a powdery porous manganese dioxide electrode.

[0020] Test o...

Embodiment 2

[0026] The first step, the preparation of electrolytic manganese dioxide:

[0027] The electrolyte is manganese sulfate solution, the mass concentration of manganese sulfate is 130g / L, the pH value is 3.5, the temperature of the electrolyte is 90°C, the titanium alloy is used as the anode, the carbon electrode is used as the cathode, and the current density is 8mA / cm 2 , The deposit obtained from the anode is washed, neutralized, ground and dried to obtain electrolytic manganese dioxide.

[0028] The second step, the preparation of powder porous manganese dioxide electrode:

[0029] Dry mix electrolytic manganese dioxide and expanded graphite evenly, the mass ratio of the two is 90:10, then add the binder (sodium carboxymethyl cellulose aqueous solution) drop by drop, stir until a paste-like object is formed, and the paste The body is smeared on both sides of a 3cm×3cm titanium mesh, compacted and dried to obtain a powdery porous manganese dioxide electrode.

[0030] The pow...

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Abstract

The invention discloses a method for preparing a powdery porous manganese dioxide electrode. The method comprises the following steps of: preparing electrolytic manganese dioxide, weighing a certain mass of expanded graphite and the prepared electrolytic manganese dioxide, dry-mixing the electrolytic manganese dioxide and the expanded graphite uniformly, dropping aqueous solution of sodium carboxymethylcellulose serving as adhesive drop by drop, continuously stirring the solution till paste is obtained, coating the paste on two sides of a titanium net, and performing compaction and drying to obtain the powdery porous manganese dioxide electrode. The method for preparing the powdery porous manganese dioxide electrode is easily implemented, obtains stable electrode performance, and has high wastewater treatment efficiency.

Description

technical field [0001] The invention relates to the technical field of high-concentration printing and dyeing wastewater treatment, in particular to a method for preparing a powdery porous manganese dioxide electrode. Background technique [0002] High-concentration printing and dyeing wastewater has the characteristics of high concentration, high chroma, unstable pH and complex components. With the development of chemical fiber fabrics in recent years, the rise of imitation silk and the progress of printing and dyeing finishing technology, PVA slurry, Rayon alkali hydrolyzate (mainly phthalic acid substances), new additives and other refractory biodegradable organic substances enter the printing and dyeing wastewater in large quantities, making it more difficult to achieve good results in the treatment of printing and dyeing wastewater. [0003] The traditional treatment process can no longer meet the increasingly stringent environmental protection requirements. In recent ...

Claims

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Application Information

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IPC IPC(8): C25B11/16C25B11/03
Inventor 王东田魏杰黄勇冯磊郝晓丹
Owner SUZHOU UNIV OF SCI & TECH
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