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Electro-Fenton system for cathode/anode in-situ production of hydrogen peroxide and application thereof in enhancement of degradation of organic pollutants

A hydrogen peroxide and anode technology, applied in water pollutants, sterilization/microdynamic water/sewage treatment, water/sewage treatment, etc., can solve problems such as difficult concentration

Active Publication Date: 2021-10-22
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is also a two-electron water oxidation reaction at the anode (Equation 3), and the use of the two-electron reaction to produce H 2 o 2 Enhanced electro-Fenton system H 2 o 2 Concentration is still difficult

Method used

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  • Electro-Fenton system for cathode/anode in-situ production of hydrogen peroxide and application thereof in enhancement of degradation of organic pollutants
  • Electro-Fenton system for cathode/anode in-situ production of hydrogen peroxide and application thereof in enhancement of degradation of organic pollutants
  • Electro-Fenton system for cathode/anode in-situ production of hydrogen peroxide and application thereof in enhancement of degradation of organic pollutants

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1F

[0031] Example 1FE / C Electrocondon Cathode

[0032] Weigh 100mg carbon black, add 3ml 1m Fe (NO) in the centrifuge tube 3 ) 3 The solution, ultrasonic 60min, pre-frozen for 12 h, frozen, and dried 48 h. Take the lyophilized sample in the tubular furnace for high temperature treatment, and the protective gas is n 2 , At 10 ° C min -1 The rate was heated to 600 ° C and then held at this temperature for 2 h, and then naturally cooled to cool the carbon black sample after pyrolysis. The carbon black sample after 50 mg of pyrolysis was suggested, and 1 ml of isopropanol, 40 μlnafion solution was added, and the mixture was tested for 1 h. On one end of the carbon felt in the drying, 1 × 1 cm 2 100 μl of the mixture of 100 μl, a total of 200 μl, and the wind is ventilated.

Embodiment 2

[0033] Example 2 Composition of two electron oxidation reactions H 2 O 2 anode

[0034] 10mg commercial TIO 2 The powder was in the centrifuge tube and 1 ml of isopropanol, 40 μlNFion solution was added, and the mixture was tested for 1 h. On one end of the carbon felt in the drying, 1 × 1 cm 2 100 μl of the mixture of 100 μl, a total of 200 μl, and the wind is ventilated.

Embodiment 3

[0035] Example 3 Application of New Electrical Fentonian System in Yield Syntabroxide

[0036] Fe / c cathodes are operated (prepared in Example 1), and the two electron oxidation reaction anodes TiO 2 To the counter electrode (Example 2), the two electrode intervals 2 cm, the reference electrode is Ag / AgCl (saturated KCl solution), and 0.20a constant current is applied to the working electrode. Electrolytic solution is 0.1m Na 2 SO 4 And use H 2 SO 4 Adjust the pH 3 ~ 9, first pass O 2 10 minutes, the experiment is continuous O 2 .

[0037] figure 2 TIO 2 -FE / C Electronston system in different pH electrolytes H 2 O 2 performance, image 3 For the traditional PT-FE / C electric fenton system of the Pt film, the results showed that the electrolysis was 6 min, TIO 2 -FE / C system accumulated in PH = 3, 5, 7,9 electrolyte H 2 O 2 The amount is significantly higher than the PT-FE / C system.

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Abstract

The invention discloses an electro-Fenton system for cathode / anode in-situ production of hydrogen peroxide and application thereof in enhancement of degradation of organic pollutants. The electro-Fenton system comprises a Fe / C electro-Fenton cathode, a TiO2 anode, a reference electrode Ag / AgCl and an electrolyte; and the three electrodes are inserted into the electrolyte, and electrolysis is carried out under the condition of constant current, so that the electro-Fenton system for cathode / anode in-situ production of hydrogen peroxide is formed. The Fe / C cathode and the TiO2 anode are used for constructing a novel electro-Fenton system, the Fe / C cathode can catalyze oxygen reduction to produce H2O2 and activate H2O2 to produce free radicals at the same time, the TiO2 anode performs two-electron water oxidation reaction to selectively produce H2O2, the H2O2 yield of the system is further increased, and ferric salt or H2O2 does not need to be additionally added.

Description

Technical field [0001] The present invention belongs to the technical field of water treatment, and therefore reflects the electroponal system of yin / anode in situ dihydrate and its application in the degradation of organic contaminants. Background technique [0002] Electrocondon technology combines the characteristics of electrochemical reactions and Fenton, continuously generating H by electrode reaction 2 O 2 Or Fe 2+ It can be used to deal with difficult degradation organic pollutants, such as dyes, pesticides, phenolic compounds, etc., have the advantages of high oxidation efficiency, low energy consumption. However, there is still a problem with narrow pH, low current efficiency, etc. (Zhang M h, et al .areview on Fenton Process for Organic Wastewater Treatment Based Onoptimization Perspective.sci.total Environment), 2019,670: 110-121.). Therefore, for the above insulation, it is urgent to find an effective way to enhance the processing efficiency of the contaminant, for...

Claims

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Application Information

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IPC IPC(8): C02F1/72C02F1/461C02F1/467C02F101/30
CPCC02F1/722
Inventor 江钧薛生国朱锋唐璐唐甜袁珊欣
Owner CENT SOUTH UNIV
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