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Preparation method and application of high-concentration free radical electrode

A free radical and high-concentration technology, applied in the field of organic pollutants, can solve the problems of electrode passivation and deactivation, low free radical concentration, slow degradation rate, etc., and achieve high free radical concentration, enhanced binding, and short treatment process Effect

Active Publication Date: 2019-10-22
坤育环境发展(云南)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the electrode materials have the following problems (1) Organic pollutants are mainly oxidized and degraded by strong oxidizing groups such as hydroxyl radicals, but the concentration of free radicals generated by the electrode is low, and the degradation rate is slow
(2) During the use of metal electrodes, especially under oxidation, oxidation reactions are prone to occur to form oxide films, resulting in electrode passivation and deactivation
Although platinum group metals have high stability and oxidation activity, their cost is too high

Method used

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  • Preparation method and application of high-concentration free radical electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: The preparation method of this high-concentration free radical electrode material and the pretreatment of coking wastewater, the specific contents are as follows:

[0031] (1) The spherical hollow titanium substrate is subjected to roughening treatment. The roughening treatment is to immerse the spherical hollow titanium substrate in a sodium hydroxide solution with a concentration of 10% by mass, heat it in a water bath to 60°C, keep it for 2 hours, and take out the spherical hollow titanium substrate. , immersed in an oxalic acid solution with a mass percentage concentration of 10%, treated at 70°C for 2 hours, taken out and rinsed with double distilled water until the pH is neutral;

[0032] (2) Perform electroless plating on the roughened titanium substrate to form a tin-antimony oxide bottom layer on the surface of the titanium substrate. Electroless plating is to uniformly coat the tin-antimony oxide sol on the surface of the roughened titanium substr...

Embodiment 2

[0037] Embodiment 2: The preparation method of this high-concentration free radical electrode material and the treatment of high-concentration organic wastewater from farms, the specific contents are as follows:

[0038] (1) The spherical hollow titanium substrate is subjected to roughening treatment. The roughening treatment is to immerse the spherical hollow titanium substrate in a sodium hydroxide solution with a concentration of 10% by mass, heat it in a water bath to 70°C, keep it for 2 hours, and take out the spherical hollow titanium substrate. , immersed in an oxalic acid solution with a mass percentage concentration of 10%, treated at 80°C for 2 hours, taken out and rinsed with double distilled water until the pH is neutral;

[0039] (2) Perform electroless plating on the roughened titanium substrate to form a tin-antimony oxide bottom layer on the surface of the titanium substrate. Electroless plating is to uniformly coat the tin-antimony oxide sol on the surface of t...

Embodiment 3

[0044] Embodiment 3: The preparation method of this high-concentration free radical electrode material and improving the aerobic composting rate of livestock and poultry manure, the specific contents are as follows:

[0045] (1) The spherical hollow titanium substrate is subjected to roughening treatment. The roughening treatment is to immerse the spherical hollow titanium substrate in a sodium hydroxide solution with a concentration of 10% by mass, heat it in a water bath to 80°C, keep it for 2 hours, and take out the spherical hollow titanium substrate. , immersed in an oxalic acid solution with a mass percentage concentration of 10%, treated at 75°C for 2 hours, taken out and rinsed with double distilled water until the pH is neutral;

[0046] (2) Perform electroless plating on the roughened titanium substrate to form a tin-antimony oxide bottom layer on the surface of the titanium substrate. Electroless plating is to uniformly coat the tin-antimony oxide sol on the surface ...

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Abstract

The invention discloses a preparation method of a high-concentration free radical electrode. The preparation method of the high-concentration free radical electrode comprises the steps of carrying outroughening treatment on a spherical hollow titanium substrate, carrying out chemical plating on the roughened titanium substrate, forming a tin antimony oxide bottom layer on the surface of the titanium substrate, placing the chemically plated titanium substrate in an alkaline plating solution to carry out alkaline plating, generating an alpha-PbO2 layer on the bottom layer of the titanium substrate, and carrying out acidic composite plating to generate a rare earth metal and a beta-PbO2 active layer on the alpha-PbO2 layer; processing a through hole in the surface of the spherical hollow titanium substrate through a laser duplicating perforating method by a laser perforator taking carbon dioxide as a laser source to prepare the spherical hollow high-concentration free radical electrode.The electrode prepared by the method is large in specific surface area, high in porosity, fast in free radical generation rate and high in concentration, the electrode is applied to organic pollutanttreatment, the treatment flow is short, the energy consumption is low, and pollutants can be rapidly and effectively degraded into small molecular substances and harmless CO2 and H2O.

Description

technical field [0001] The invention relates to a preparation method and application of a high-concentration free radical electrode, belonging to the field of organic pollutants. Background technique [0002] The electrocatalytic oxidation method refers to the direct oxidation of organic pollutants on the surface of electrode materials with electrocatalytic properties during the electrolysis process, or the indirect oxidation of organic pollutants by electrode materials through electrochemical action to generate free radical groups with strong oxidation ability, and finally make them completely degrades into harmless CO 2 and H 2 The green chemical technology of O; in the process of electrocatalysis, the modifiers on the electrode surface or in the solution phase can promote or inhibit the redox reaction of gaining and losing electrons on the working electrode under the action of an electric field, while the modifiers on the electrode surface or in the solution phase themse...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F1/467C02F1/72C23C18/12C25D9/06C02F101/36
CPCC02F1/4672C02F1/46109C02F1/725C02F1/722C23C18/1216C23C18/1254C25D9/06C02F2001/46142C02F2101/36
Inventor 瞿广飞李恒李军燕李志顺成杨聪庆
Owner 坤育环境发展(云南)有限公司
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