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Preparation method of titanium-based lead dioxide anode

A technology of lead dioxide and cerium oxide, which is applied in the field of electrocatalytic oxidation treatment of industrial wastewater, can solve the problems of corrosion resistance and service life defects, rough surface of the active layer, large grain pores, etc., and achieve long service life and surface Uniform and dense, high electrochemical oxidation performance

Active Publication Date: 2018-11-30
SHANDONG LONGANTAI ENVIRONMENTAL PROTECTION SCI TECH CO LTD
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The related patent CN 103014800 A discloses a preparation method of a cerium-doped graphite-based lead dioxide catalytic electrode. 2 Interlayer and Ce-doped β-PbO 2 active layer, but this method starts with Ce 3+ As a dopant, compared to CeO 2 , Ce 3+ β-PbO prepared by doping 2 The surface of the active layer is relatively rough and the grain pores are large, so it has defects in corrosion resistance and service life

Method used

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preparation example Construction

[0025] The invention discloses a preparation method of a titanium-based lead dioxide anode. The preparation method comprises the following steps:

[0026] 1) Pretreatment of the titanium-based substrate to remove impurities on the surface of the substrate and obtain a surface with good processing performance. The surface pretreatment includes grinding, decontamination and acid etching. Acid etching can obtain a pockmarked surface.

[0027] 2) Dissolve tin tetrachloride and antimony trichloride in isopropanol containing hydrochloric acid, and coat the surface of the titanium plate substrate, dry at 120°C for 10-15min, then bake for 5-20min, repeat 8- 10 times, and finally roasted for 1.0-2.0h to obtain an electrode with a bottom layer of tin antimony oxide. In a solution prepared by dissolving tin tetrachloride and antimony trichloride in isopropanol containing hydrochloric acid, the tin tetrachloride The composition of the antimony trichloride coating solution is 500mmol / L of ...

Embodiment 1

[0031] A titanium-based lead dioxide anode co-modified with cerium dioxide and bait, the preparation method is as follows: polish a 10*10cm*3mm titanium mesh plate with sandpaper, wash it with clean water, and then heat it in 40% sodium hydroxide solution at 80°C Remove oil for 2 hours, wash with water, and then heat and boil in 10% oxalic acid solution for 2-3 hours, until the surface of the screen appears gray and pockmarked, rinse with water.

[0032]Dissolve tin tetrachloride and antimony trichloride in isopropanol containing hydrochloric acid, and coat the surface of the titanium plate substrate, dry at 120°C for 10 minutes, and then bake at 500°C for 5 minutes, repeat 10 times, and finally Baking at 500°C for 1.0h to obtain an electrode with a bottom layer of tin antimony oxide, the composition of tin tetrachloride and antimony trichloride coating solution is 500mmol / L SnCl 4 ·5H 2 O, 60mmol / L SbCl 3 , isopropanol 100mL, concentrated hydrochloric acid 15mL.

[0033] E...

Embodiment 2

[0037] A titanium-based lead dioxide anode co-modified with cerium dioxide and bait, the preparation method is as follows: polish a 50*20cm*3mm titanium stencil with sandpaper, rinse it with clean water, and then heat it in 40% sodium hydroxide solution at 80°C Remove oil for 2 hours, wash with water, and then heat and boil in 10% oxalic acid solution for 2-3 hours, until the surface of the screen appears gray and pockmarked, rinse with water.

[0038] Dissolve tin tetrachloride and antimony trichloride in isopropanol containing hydrochloric acid, and coat the surface of the titanium plate substrate, dry at 120°C for 15 minutes, and then bake at 500°C for 15 minutes, repeat 10 times, and finally Baked at 500°C for 1.2h to obtain an electrode with a bottom layer of tin antimony oxide, the composition of tin tetrachloride and antimony trichloride coating solution is 500mmol / L SnCl 4 ·5H 2 O, 60mmol / L SbCl 3 , isopropanol 100mL, concentrated hydrochloric acid 50mL.

[0039] El...

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Abstract

A preparation method of a titanium-based lead dioxide anode comprises the following steps that a titanium-based matrix is pre-treated; tin tetrachloride and antimony trichloride are dissolved into isopropyl alcohol containing hydrochloric acid, the surface of a titanium plate matrix is coated with the mixture, and an electrode with an antimony-tin oxide bottom layer is obtained after drying and roasting; the electrode with the antimony-tin oxide bottom layer serves as the anode, a titanium plate serves as a cathode, and alpha-PbO2 intermediate layer is subjected to electro-deposition in a sodium hydroxide plating solution where PbO is dissolved; the titanium plate serves as the anode, another titanium plate serves as the cathode, modified beta-PbO2 active layer containing cerium dioxide, erbium and fluorine is prepared through electro-deposition, and the titanium-based lead dioxide anode is obtained. The surface of a polar plate prepared through the preparation method is uniform and compact, the service life is long, the electrochemical oxidation performance is high, and the treatment cost is low.

Description

technical field [0001] The invention relates to the technical field of electrocatalytic oxidation treatment of industrial wastewater, in particular to a method for preparing a titanium-based lead dioxide anode co-doped with ceria and bait in the electrocatalytic oxidation process. Background technique [0002] With the rapid development of modern industry, the global economy has grown by leaps and bounds, which brings convenience to people's lives, but also produces a large amount of industrial wastewater containing toxic, harmful, and refractory pollutants. If industrial wastewater is not treated directly If it enters the water body, it will cause serious pollution and damage to the environment, and then endanger human health. Therefore, the treatment of industrial wastewater is urgent and cannot be ignored. [0003] The traditional treatment methods of industrial wastewater include biochemical methods, physical methods, chemical methods, etc. These methods have the disadv...

Claims

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Application Information

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IPC IPC(8): C23C28/04C25D9/06C23C18/12C02F1/461
CPCC02F1/46109C02F2001/46142C02F2209/08C23C18/1216C23C28/04C25D9/06
Inventor 代春龙邹宗海魏明勇
Owner SHANDONG LONGANTAI ENVIRONMENTAL PROTECTION SCI TECH CO LTD
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