Preparation method and application of novel lead dioxide electrode with electrocatalytic oxidation performance

A technology of lead dioxide and electrode, which is applied in the preparation and application field of a new type of lead dioxide electrode with electrocatalytic oxidation performance, which can solve the problems of reducing the electrochemical stability and service life of the electrode, shedding of the plating layer, and insufficient degradation of organic matter, etc.

Inactive Publication Date: 2019-08-09
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Second, the photochemical oxidation method, due to the mild reaction conditions and strong oxidizing ability, the photochemical oxidation method has developed rapidly in recent years, but due to the limitation of the reaction conditions, a variety of aromatic organic intermediates will be produced when the photochemical method is used to treat organic matter, resulting in insufficient degradation of organic matter Thoroughly, this becomes a problem to be overcome by photochemical oxidation
For example, there is a large internal stress inside the lead dioxide coating, and the nascent oxygen generated during the electrolysis process easily diffuses through the surface layer to the substrate, which will passivate the substrate, peel off the coating, and reduce the electrochemical stability of the electrode. performance and service life

Method used

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  • Preparation method and application of novel lead dioxide electrode with electrocatalytic oxidation performance
  • Preparation method and application of novel lead dioxide electrode with electrocatalytic oxidation performance
  • Preparation method and application of novel lead dioxide electrode with electrocatalytic oxidation performance

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Embodiment 1

[0041] The embodiment of the present application provides a lead dioxide electrode, and the specific preparation method (using 98% concentrated sulfuric acid treatment and 20% dilute sulfuric acid to carry out constant potential electrolysis treatment) is as follows:

[0042] (1) Pretreatment of the lead plate: Put the lead plate (40*30cm) into the alkaline solution (the alkaline solution includes 10g / L NaOH, 20g / L NaOH 2 CO 3 , 5g / L NaSiO 3 , 10g / L of Na 3 PO 4 12H 2 O and surplus water) are mixed in the cleaning tank, alkaline solution is used to remove grease, then puts into the cleaning tank that is added with acid solution (acid solution includes the HCl that volume fraction is 20%) and mixes, and acid solution is used for removing The surface oxide of the lead plate is finally washed with 80° C. deionized water to obtain the pretreated lead plate.

[0043] (2) Sulfuric acid treatment of lead plate: lead plate after pretreatment in (1) is put into reaction tank, soak...

Embodiment 2

[0049] The embodiment of this application is the application of lead dioxide electrode in sewage treatment, and the specific steps are as follows:

[0050] see Figure 4 , Figure 4 The structural diagram of the sewage treatment device provided by the embodiment of the present application, the sewage treatment device includes an electrolytic cell 1, a power supply 2 and an electrode 3, the electrolytic cell 1 is a rectangular body with a length of 15m, a width of 10m, and a height of 3m, and the electrolytic cell 1 There are 10 inside with a volume of 3*5*3m 3 The compartment, with the lead dioxide electrode prepared in embodiment 1 as the anode, the stainless steel plate of the same area as the cathode, placed in parallel in the electrolytic cell 1 to form 10 pairs of electrode pairs, the cathode and the anode are connected to the power supply 2. 200-300m 3 / d of sewage A (COD of sewage A is 12000-15000mg / L, BOD is 5400-6000mg / L) After 48 hours of UASB reactor and aeration...

Embodiment 3

[0052] The embodiment of this application is the application of lead dioxide electrode in sewage treatment, and the specific steps are as follows:

[0053] see Figure 4 , Figure 4 For the sewage treatment device provided by the embodiment of the present application, the sewage treatment device includes an electrolytic cell 1, a power supply 2 and an electrode 3. The electrolytic cell 1 is a rectangular body with a length of 15 m, a width of 10 m, and a height of 3 m. There are 10 electrolytic cells in the electrolytic cell 1. A volume of 3*5*3m 3 The compartment, with the lead dioxide electrode prepared in embodiment 1 as the anode, the stainless steel plate of the same area as the cathode, placed in parallel in the electrolytic cell 1 to form 10 pairs of electrode pairs, the cathode and the anode are connected to the power supply 2. 200-300m 3 / d of sewage A (COD of sewage A is 12000-15000mg / L, BOD is 5400-6000mg / L) After 48 hours of UASB reactor and aeration treatment, ...

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Abstract

The invention belongs to the field, in particular to a preparation method and application of a novel lead dioxide electrode with the electrocatalytic oxidation performance. The preparation method of the lead dioxide electrode comprises the following steps that 1, a lead plate is cleaned with an alkali solution and an acid solution in sequence, and then cleaning is conducted thoroughly with water to obtain a lead plate obtained after pretreatment; 2, the lead plate obtained after pretreatment is mixed with concentrated sulfuric acid, cleaning is conducted thoroughly with water to obtain a leadplate obtained after acid treatment; 3, the lead plate obtained after acid treatment serves as an electrode, dilute sulphuric acid and a metal cation solution serve as electrolytes, an electrolytic reaction is conducted, and the lead dioxide electrode is obtained. The invention provides the lead dioxide electrode and application thereof in sewage treatment. According to the lead dioxide electrodeand the preparation method and application thereof, the technical problems that in the prior art, a lead dioxide electrode is short in service life, low in oxygen evolution potential and poor in oxidation performance are solved.

Description

technical field [0001] The invention belongs to the technical field, and in particular relates to a preparation method and application of a novel lead dioxide electrode with electrocatalytic oxidation performance. Background technique [0002] With the rapid development of the large-scale animal husbandry industry, the contradiction between the pollution discharge caused by the aquaculture industry and environmental protection has become increasingly prominent. Conventional physical, chemical, and biological methods have not yet met the current requirements after the treatment of aquaculture wastewater. Wastewater biodegradability is low, at this time advanced oxidation technology came into being and has made significant progress. Advanced oxidation technology (Advanced Oxidation Technologies, referred to as AOT), also known as deep oxidation technology, is a new type of oxidation and pollution removal that uses highly active free radicals (such as OH) to convert refractory ...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): C02F1/461C02F1/72C25D11/34C25D7/00
CPCC02F1/46109C02F1/4672C02F2001/46133C25D7/00C25D11/34
Inventor谢光炎陈卓瑶许燕滨周晓梅志纲
OwnerGUANGDONG UNIV OF TECH