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Preparation method of anode material for efficiently degrading phenol wastewater

A technology for the degradation of anode materials and wastewater, applied in electrolytic inorganic material coatings, electrolytic coatings, chemical instruments and methods, etc., can solve the problems of surface peeling of substrates, weak binding force, and failure to meet actual production requirements.

Active Publication Date: 2020-10-13
BAOJI UNIQUE TITANIUNM IND CO LTD
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  • Abstract
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Problems solved by technology

However, the prior art faces the following technical problems: (1) The conductivity of the anodized titanium oxide is not high, so graphene is added to improve the conductivity of the anode, but the anodic oxidation Titanium has a porous structure, and the use of sheet-like graphene to improve conductivity will block the pores; (2) Although electrodeposition is used between graphene and titanium oxide, the bonding force comes from adsorption without any chemical bonding. Subsequent electrodeposition of lead oxide will inevitably reduce the binding force between lead oxide and titanium oxide. Obviously, although the prior art has improved activity, its life cannot meet the actual production requirements; (3) lead oxide is β crystal Type, high stress, easy to peel off the surface of the heavy substrate
The prior art provides a means of combining carbon nanotubes and oxide films, but faces the following technical problems: (1) carbon nanotubes have not been pretreated, resulting in the binding force of the rest of the titanium oxide to be considered; (2 ) The substrate is used as a photocatalytic material and can be widely used in many fields such as photocatalysis, dye-sensitized cells, gas sensors, etc. There is no suggestion that it can be used for electrode preparation
The method includes roughening the surface of the titanium substrate, plating the bottom layer of tin antimony oxide by thermal decomposition, and then alkaline electroplating α-PbO 2 And acid composite plating fluorine-containing β-PbO 2 , to obtain fluorine-containing β-PbO in titanium matrix 2 electrode, but the above-mentioned disclosed anode, because its binding force is not strong, its service life all needs to be improved
[0012] Based on the above, as Ti / PbO 2 Many patents have been published abroad regarding the improvement of the electrode, its performance and method of use, on the pretreatment of Ti substrates, anodic oxidation, and obtaining α or βPbO 2 , and the use of doping elements for coarsening improvement has become mature, but the modification of the anode life is still in urgent need of improvement, which severely limits industrial applications

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  • Preparation method of anode material for efficiently degrading phenol wastewater
  • Preparation method of anode material for efficiently degrading phenol wastewater
  • Preparation method of anode material for efficiently degrading phenol wastewater

Examples

Experimental program
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Embodiment 1

[0062] An anode material for high-efficiency phenol wastewater degradation, which is prepared by the following method:

[0063] (1) Provide a titanium or titanium alloy metal substrate, and pretreat the metal substrate. The pretreatment includes mechanical polishing-alkaline washing-acid cleaning, and the polishing is followed by using 300 mesh and 800 mesh sandpaper Polished, then rinsed with deionized water, the alkaline washing is a mixed aqueous solution of 10g / L sodium carbonate, 10g / L trisodium phosphate, 10g / L sodium silicate, 1g / L octylphenol polyoxyethylene ether, temperature 40 o C, time 10min,

[0064] The pickling is a composite pickling solution of 2wt.% oxalic acid and 1wt.% hydrochloric acid, and the pickling temperature is 50 o C, time 30min, use deionized washing after pickling.

[0065] (2) Configure an anodizing solution containing carbon nanotubes. The anodizing solution is 50ml of an aqueous solution of 4g / L ammonium fluoride, 300ml ethylene glycol, and 0.15wt.% ...

Embodiment 2

[0074] An anode material for high-efficiency phenol wastewater degradation, the material is prepared by the following method:

[0075] (1) Provide a titanium or titanium alloy metal substrate, and pretreat the metal substrate. The pretreatment includes mechanical polishing-alkaline washing-acid cleaning, and the polishing is followed by using 300 mesh and 800 mesh sandpaper Polished, then rinsed with deionized water, the alkaline washing is a mixed aqueous solution of 15g / L sodium carbonate, 15g / L trisodium phosphate, 15g / L sodium silicate, 1.5g / L octylphenol polyoxyethylene ether, temperature 15 o C, time 12.5min,

[0076] The pickling is a compound pickling solution of 2.5wt. oxalic acid and 1.25wt.% hydrochloric acid, and the pickling temperature is 55 o C, time 35min, use deionized washing after pickling.

[0077] (2) Configure an anodizing solution containing carbon nanotubes. The anodizing solution is 55ml of an aqueous solution of 4.5g / L ammonium fluoride, 400ml ethylene glyc...

Embodiment 3

[0086] An anode material for high-efficiency phenol wastewater degradation, the material is prepared by the following method:

[0087] (1) Provide a titanium or titanium alloy metal substrate, and pretreat the metal substrate. The pretreatment includes mechanical polishing-alkaline washing-acid cleaning, and the polishing is followed by using 300 mesh and 800 mesh sandpaper Polished, then rinsed with deionized water, the alkaline washing is a mixed aqueous solution of 20g / L sodium carbonate, 20g / L trisodium phosphate, 20g / L sodium silicate, 2g / L octylphenol polyoxyethylene ether, temperature 50 o C, time 15min,

[0088] The pickling is a composite pickling solution of 3wt. oxalic acid and 1.5wt.% hydrochloric acid, and the pickling temperature is 60 o C, time 40min, use deionized washing after pickling.

[0089] (2) Configure an anodizing solution containing carbon nanotubes. The anodizing solution is 60ml of an aqueous solution of 5g / L ammonium fluoride, 300-500ml ethylene glycol, a...

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Abstract

The invention provides an anode material for efficiently degrading phenol wastewater. The binding force of lead oxide of the anode material and a titanium substrate is high, the service life is long,the stability is good, the electrocatalytic oxidation activity is high, the oxygen evolution potential of the anode is 1.81 V, and after the anode is used for degrading phenol wastewater for 100 min,the removal rate of phenol is 84.1%, and the removal rate of COD is 66.3%.

Description

Technical field [0001] The invention relates to a preparation method of a high-efficiency anode material, which is used for electrocatalytic oxidation to remove organic pollutants in water, and belongs to the technical field of electrocatalytic oxidation treatment of industrial wastewater. [0002] technical background [0003] Phenol is an important basic organic chemical raw material. With the development of industrial economy, especially the rapid expansion and growth of the variety and output of synthetic materials, the demand for phenol worldwide and the development of downstream products continue to increase. , Dyes, explosives, preservatives, coal gasification, oil refining, fiber, machinery, pipes and many other industries are widely used. Due to different industrial categories, product types and process conditions, the composition of wastewater and the concentration of phenol are quite different, especially the wastewater from processing phenolic resin contains extremely ...

Claims

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Application Information

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IPC IPC(8): C02F1/461C02F1/72C25D11/26C25D15/00C25D9/06C02F101/34
CPCC02F1/4672C25D11/26C25D15/00C25D9/06C02F2101/345Y02W10/37
Inventor 赵玉平
Owner BAOJI UNIQUE TITANIUNM IND CO LTD
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