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Method for cooperatively degrading organic matters by visible light photoelectric-Fenton

A technology of synergistic degradation and visible light, applied in the direction of protection devices against harmful chemicals, etc., can solve the problems of high cost, human injury, hindering popularization and application, etc., to achieve the effect of simple operation, reducing compounding, and improving photocatalytic efficiency.

Active Publication Date: 2013-12-18
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method is still limited to the use of ultraviolet light. The cost of ultraviolet light is high, it is easy to cause damage to the human body, and it only accounts for a small part of sunlight. These inevitable disadvantages will hinder the further application of this method.

Method used

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  • Method for cooperatively degrading organic matters by visible light photoelectric-Fenton

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Polish the Ti-based substrate with a purity >99.6% with metallographic sandpaper of 500#, 1000#, and 1500# in sequence until the surface is smooth, and then immerse in a volume ratio of HF:HNO 3 :H 2 Chemical polishing was carried out in the polishing solution of O=1:4:5 for 30 s, and then cleaned in an ultrasonic cleaner with acetone and pure water in sequence. The treated Ti-based substrate was used as the anode, the graphite electrode was used as the cathode, and the distance between the anode and the cathode was 4 cm. 4 The mixed solution of F and glycerol is used as the electrolyte, the volume ratio of glycerol to water is 1:9, and it contains NH 4 The concentration of F is 0.5 wt%. Use copper wires as wires to connect the two stages to a DC stabilized power supply for electrochemical anodic oxidation. In this reaction, the controlled voltage was 30 V, and the anodic oxidation time was 90 min, to obtain amorphous mesoporous TiO 2 Thin film electrode; after 120 ...

Embodiment 2

[0032] Polish the Ti-based substrate with a purity >99.6% with metallographic sandpaper of 500#, 1000#, and 1500# in sequence until the surface is smooth, and then immerse in a volume ratio of HF:HNO 3 :H 2 Chemical polishing was carried out in the polishing solution of O=1:4:5 for 30 s, and then cleaned in an ultrasonic cleaner with acetone and pure water in sequence. The treated Ti-based substrate was used as the anode, the graphite electrode was used as the cathode, and the distance between the anode and the cathode was 5 cm, and the NH 4 The mixed solution of F and glycerol is used as the electrolyte, the volume ratio of glycerol to water is 1:9, and it contains NH 4 The concentration of F is 0.3 wt%. Use copper wires as wires to connect the two stages to a DC stabilized power supply for electrochemical anodic oxidation. In this reaction, the controlled voltage was 10 V, and the anodic oxidation time was 150 min to obtain amorphous mesoporous TiO 2 Thin film electrode;...

Embodiment 3

[0036] Polish the Ti-based substrate with a purity >99.6% with metallographic sandpaper of 500#, 1000#, and 1500# in sequence until the surface is smooth, and then immerse in a volume ratio of HF:HNO 3 :H 2 Chemical polishing was carried out in the polishing solution of O=1:4:5 for 30 s, and then cleaned in an ultrasonic cleaner with acetone and pure water in sequence. The treated Ti-based substrate was used as the anode, the graphite electrode was used as the cathode, and the distance between the anode and the cathode was 3 cm. 4 The mixed solution of F and glycerol is used as the electrolyte, the volume ratio of glycerol to water is 1:9, and it contains NH 4 The concentration of F is 0.2 wt%. Use copper wires as wires to connect the two stages to a DC stabilized power supply for electrochemical anodic oxidation. In this reaction, the controlled voltage was 40 V, and the anodic oxidation time was 90 min to obtain amorphous mesoporous TiO 2 Thin film electrode; after 120 m...

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Abstract

The invention discloses a method for cooperatively degrading organic matters by visible light photoelectric-Fenton. According to the method, a visible light photoelectric-Fenton system formed by visible light, photocatalysis and electric-Fenton is used and the organic matters are put into the system to be degraded. The method comprises the specific steps of (1) preparing a mesoporous TiO2 thin film electrode; (2) forming the visible light photoelectric-Fenton system; and (3) degrading the organic matters. According to the method, a photocatalysis technology, a photoelectric oxidization technology and a Fenton oxidization technology are combined and the visible light is introduced to form the visible light photoelectric-Fenton system; the self-made mesoporous TiO2 thin film electrode is used in the visible light photoelectric-Fenton system to realize the mutual cooperative effect of the photocatalysis and the electric-Fenton under the visible light, so that the treatment effect on organic pollutants by the whole system is improved.

Description

technical field [0001] The invention belongs to the field of environmental protection and governance, and relates to a method for degrading organic matter by using a visible light photoelectric-Fenton system. Background technique [0002] Photocatalysis has been widely used in the degradation of organic matter in the environment, nano-TiO 2 Photocatalysts are favored by researchers due to their good catalytic performance, non-toxicity, and low price. Traditional TiO 2 The photocatalyst is in the form of powder, which has problems such as difficult separation of the catalyst and easy to cause secondary pollution. Mesoporous TiO 2 , due to the advantages of high specific surface area, ordered pore structure, controllable pore size, and easy surface modification, it can solve the problem of traditional TiO 2 Photocatalysis has problems such as difficult separation of catalysts and easy to cause secondary pollution. [0003] Patent 200910306567.0 discloses the preparation m...

Claims

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Application Information

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IPC IPC(8): A62D3/11A62D101/20
Inventor 喻泽斌彭振波孙玲芳胡晓
Owner GUANGXI UNIV
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