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Electrocatalytic oxidation electrode for sewage treatment and preparation method thereof

A technology for electrocatalytic oxidation and sewage treatment, which is applied in water/sewage treatment, oxidized water/sewage treatment, water/sludge/sewage treatment, etc. Oxidation and other problems, to achieve good electrochemical properties, good electron transfer performance, highlight the effect of electrocatalytic oxidation activity

Active Publication Date: 2018-06-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Currently, commonly used PbO 2 The electrode is a titanium-based electrode, and the new ecological oxygen atoms generated during use can easily diffuse to the titanium substrate and oxidize to form TiO 2 Transition layer, resulting in a decrease in electrode oxidation efficiency and shortened life
Therefore, how to overcome the problems of easy oxidation of the titanium-based lead dioxide electrode substrate, reduced oxidation efficiency, easy peeling off of the active coating, and short service life has become a research hotspot in the field.

Method used

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  • Electrocatalytic oxidation electrode for sewage treatment and preparation method thereof
  • Electrocatalytic oxidation electrode for sewage treatment and preparation method thereof
  • Electrocatalytic oxidation electrode for sewage treatment and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0023] (1) Preparation of titanium-based boron-doped diamond film: ①Using a titanium plate with a thickness of 0.5mm as the substrate, soak it in dilute hydrochloric acid for 30 minutes to remove the oxide layer on the surface, then put it into alcohol for ultrasonic cleaning, and blow it dry with inert gas after taking it out; ②Use ultrasonic technology to inoculate diamond crystal seeds on the titanium plate, and the ultrasonic time is 5 minutes; the preparation method of diamond crystal seeds is: disperse powder diamond with a particle size of about 0.5 μm in acetone solution, and the mass ratio of powder diamond to acetone solution is 1:200; ③ Put the titanium plate prepared in ② into the reaction chamber of the microwave plasma vapor-phase chemical deposition equipment, use a vacuum pump to remove the air in the reaction chamber, and then pass CH 4 and H 2 As a reactive gas, mixed with H 2 The borane in is used as a boron dopant, and the reaction pressure is controlled t...

Embodiment 2

[0028] (1) Preparation of titanium-based boron-doped diamond film: ① Use a titanium mesh with a thickness of 2 mm as the substrate, soak it in 5% sodium hydroxide for 10 minutes to remove the oxide layer on the surface, then put it into alcohol for ultrasonic cleaning, and use an inert gas after taking it out Blow dry; ② use ultrasonic technology to inoculate diamond crystal seeds on titanium mesh, and the ultrasonic time is 20 minutes; the preparation method of diamond crystal seeds is: disperse powder diamond with a particle size of about 5 μm in acetone solution, and the mass ratio of powder diamond to acetone solution 1:40; ③ Put the titanium plate prepared in ② into the reaction chamber of the hot wire vapor chemical deposition equipment, use the vacuum pump to remove the air in the reaction chamber, and then pass CH 4 and H 2 As a reactive gas, mixed with H 2 The borane in is used as a boron dopant, and the reaction pressure is controlled to be 5000Pa, wherein CH 4 wit...

Embodiment 3

[0033] (1) Preparation of titanium-based boron-doped diamond film: ① Use a titanium plate with a thickness of 1 mm as the substrate, soak it in dilute sulfuric acid for 15 minutes to remove the oxide layer on the surface, then put it in alcohol for ultrasonic cleaning, and blow it dry with inert gas after taking it out; ② Ultrasonic technology is used to inoculate diamond crystal seeds on a titanium plate, and the ultrasonic time is 30min; the preparation method of diamond crystal seeds is: disperse powder diamond with a particle diameter of about 10 μm in acetone solution, and the mass ratio of powder diamond to acetone solution is 1: 20; ③ Put the titanium plate prepared in ② into the reaction chamber of the microwave plasma vapor-phase chemical deposition equipment, use a vacuum pump to remove the air in the reaction chamber, and then pass CH 4 and H 2 As a reactive gas, mixed with H 2 The borane in is used as a boron dopant, and the reaction pressure is controlled to be 6...

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Abstract

The invention relates to an electrocatalytic oxidation electrode for sewage treatment and a preparation method thereof. According to the invention, a titanium-based boron-doped diamond film is used asa substrate, porous carbon is used as a transition layer and lead oxide is used as an active coating to prepare the boron-doped diamond film / porous carbon / lead dioxide three-component composite electrode. The invention also provides a preparation method for the above electrocatalytic oxidation electrode. The preparation method comprises the following steps: preparing a boron-doped diamond film material and the porous carbon transition layer by using a vapor-phase chemical deposition process; and then depositing a lead dioxide coating. The boron-doped diamond film / porous carbon / lead dioxide three-component composite electrode prepared by using the method has high oxidation efficiency to organic pollutants, overcomes the problems of proneness to oxidation and falling and short service lifeof titanium substrates of traditional lead dioxide electrodes, presents good chemical and mechanical stability, and can be applied to the electrochemical treatment of difficult-to-degrade sewage.

Description

technical field [0001] The invention belongs to the field of water pollution control, and in particular relates to an electrocatalytic oxidation electrode for sewage treatment and its preparation method and application. Background technique [0002] With the gradual improvement of environmental standards, the up-to-standard discharge of refractory sewage in petrochemical, printing and dyeing, pharmaceutical and other industries has become a bottleneck restricting the development of enterprises. However, the existing advanced sewage treatment technologies generally have problems such as low efficiency and high cost. Therefore, the development of efficient Advanced treatment technology has important practical significance, and it is also a key problem that needs to be solved urgently in the field of water pollution control. Advanced oxidation technology including electrocatalytic oxidation technology is an important means to treat refractory sewage. Electrocatalytic oxidation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F1/72
CPCC02F1/46109C02F1/4672C02F2001/46142
Inventor 马传军陈天佐马宁王雪清郭宏山
Owner CHINA PETROLEUM & CHEM CORP
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