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Photoelectrocatalytic oxidation method for efficiently removing atrazine through cooperation of cathode and anode

A photoelectric catalysis and atrazine technology, applied in chemical instruments and methods, oxidized water/sewage treatment, water pollutants, etc., can solve problems such as reducing photoelectric catalytic oxidation efficiency, improve photoelectric catalytic oxidation efficiency, and increase yield , the effect of suppressing side effects

Inactive Publication Date: 2020-10-30
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The problem is that photogenerated electrons, like holes, are very important active species. They have not been fully used in the degradation of pollutants in traditional photocatalytic systems, and the hydrogen generated at the cathode will free the hydroxyl groups generated at the anode instead. Active species such as radicals play a quenching role, reducing the photoelectric catalytic oxidation efficiency of the entire system.

Method used

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  • Photoelectrocatalytic oxidation method for efficiently removing atrazine through cooperation of cathode and anode
  • Photoelectrocatalytic oxidation method for efficiently removing atrazine through cooperation of cathode and anode

Examples

Experimental program
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Embodiment 1

[0031] With 0.2V bias, carbon electrode is used as cathode, TiO 2 Take NTs electrode photoelectric catalytic oxidation of atrazine as an example:

[0032] The carbon electrode was used as the cathode under the action of 0.2V bias voltage. The photoelectrocatalytic oxidation experiment of atrazine was carried out in a semicircular quartz degradation cell containing a double-walled cooling circulating water interlayer. The initial concentration of atrazine in the degradation solution was 2 ppm. The volume of the degradation liquid is 80mL, which contains 0.05M Na 2 SO 4 ; Use a super constant temperature water tank to maintain the temperature of the reaction system at 25 ℃. In this three-electrode degradation system, TiO 2 NTs electrode as anode (the effective area of ​​the electrode is 14cm 2 ), the carbon electrode is used as the cathode, and the saturated calomel electrode is used as the reference electrode. Before the start of the photoelectrocatalytic oxidation experiment, T...

Embodiment 2

[0034] Under the action of 0.2V bias, carbon electrode is used as cathode, pH=3, TiO 2 Take NTs electrode photoelectric catalytic oxidation of atrazine as an example:

[0035] The carbon electrode was used as the cathode under the action of 0.2V bias voltage, pH=3, and the photoelectrocatalytic oxidation experiment of atrazine was carried out in a semicircular quartz degradation cell containing a double-walled cooling circulating water interlayer. The atrazine in the degradation solution was initially The concentration is 2ppm, the volume of the degradation liquid is 80mL, which contains 0.05M Na 2 SO 4 ; Use a super constant temperature water tank to maintain the temperature of the reaction system at 25 ℃. In this three-electrode degradation system, TiO 2 NTs electrode as a working electrode (the effective area of ​​the electrode is 14cm 2 ), the carbon electrode is used as the counter electrode, and the saturated calomel electrode is used as the reference electrode. Before th...

Embodiment 3

[0037] Under the action of 0.5V bias, carbon electrode is used as cathode, pH=3, TiO 2 Take NTs electrode photoelectric catalytic oxidation of atrazine as an example:

[0038] The carbon electrode was used as the cathode under the action of 0.5V bias voltage, pH=3, and the photoelectrocatalytic oxidation experiment of atrazine was carried out in a semicircular quartz degradation cell containing a double-walled cooling circulating water interlayer. The atrazine in the degradation solution was initially The concentration is 2ppm, the volume of the degradation liquid is 80mL, which contains 0.05M Na 2 SO 4 ; Use a super constant temperature water tank to maintain the temperature of the reaction system at 25 ℃. In this three-electrode degradation system, TiO 2 NTs electrode as a working electrode (the effective area of ​​the electrode is 14cm 2 ), the carbon electrode is used as the counter electrode, and the saturated calomel electrode is used as the reference electrode. Before th...

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Abstract

The invention relates to a photoelectrocatalytic oxidation method for efficiently removing atrazine through cooperation of a cathode and an anode. A three-electrode system is constructed by using a TiO2NTs electrode as an anode, a C electrode as a cathode and a saturated calomel electrode as a reference electrode to carry out photoelectrocatalytic oxidation treatment on an atrazine solution, photoelectrocatalytic oxidation degradation of atrazine is realized, and the removal rate of atrazine reaches 98% within 2 hours. Compared with the prior art, according to the invention, the mode in whicha Pt sheet is used as a cathode in a traditional photoelectrocatalysis system is changed, a carbon material with good 2-electron oxygen reduction catalytic performance is selected as a cathode, photo-induced electrons generated on the surface of a photo-anode are fully utilized, H2O2 is generated on the surface of the cathode and further decomposed into hydroxyl radicals, the total amount of the hydroxyl radicals in a whole photoelectrocatalysis system is increased, and efficient photoelectrocatalytic oxidation of atrazine is achieved.

Description

Technical field [0001] The invention belongs to the technical field of photoelectric catalysis, and relates to a photoelectric catalytic oxidation method for efficiently removing atrazine from anode and cathode. Background technique [0002] With the rapid development of industry and economy, environmental pollution, especially water pollution, has become increasingly serious. The concentration and types of pollutants such as pesticides and metabolites in water bodies gradually accumulate and increase with the increasing human activities, which seriously threaten human life and health. At present, in addition to traditional methods such as activated carbon adsorption, membrane filtration, flocculation precipitation filtration, and biodegradation methods, which have been commonly used for the removal of pollutants in water bodies, research on advanced oxidation technologies such as electrochemical methods and photocatalytic methods for pollutant degradation has become a concern t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F1/72C02F101/38C02F101/36
CPCC02F1/4672C02F1/46109C02F1/725C02F1/722C02F2001/46133C02F2101/38C02F2101/36
Inventor 史慧杰华炎波张正杨赵国华
Owner TONGJI UNIV