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Photoelectrocatalysis method of photocathode photoelectric turntable with pointed cone structure for treating organic waste water

A technology of organic wastewater and photoelectric catalysis, applied in the direction of light water/sewage treatment, energy wastewater treatment, oxidized water/sewage treatment, etc., can solve the problems of waste of excitation light, etc., to increase the surface area, speed up the exchange and renewal, and improve the utilization rate Effect

Active Publication Date: 2011-04-27
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, like many existing photoelectrocatalytic anodes, the photoanode has a planar structure, and only one absorption occurs after the light hits the surface, and the rest of the light energy is reflected into the atmosphere, and there is still a waste of excitation light.

Method used

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  • Photoelectrocatalysis method of photocathode photoelectric turntable with pointed cone structure for treating organic waste water
  • Photoelectrocatalysis method of photocathode photoelectric turntable with pointed cone structure for treating organic waste water
  • Photoelectrocatalysis method of photocathode photoelectric turntable with pointed cone structure for treating organic waste water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Dye wastewater was treated by conical anode rotating disk liquid film reactor with different bottom-to-height ratios, and a flat photoanode was used as a comparison example.

[0032] Such as figure 1 and figure 2 As shown, the treatment object is 30ppm rhodamine B (pH2.5, 1.0g / LNa 2 SO 4 ) to simulate dye wastewater. The waste water volume was 120ml.

[0033] 1) Using a titanium disc as the base, use the CNC lathe processing method to process the flat disc base into a pointed cone with a bottom width of 2mm and a height of 2-8mm (that is, the ratio of bottom to height is 1:1-1:4), and use sol- TiO 2 The photocatalyst is loaded on the substrate, and the turntable is fixed on the rotating shaft in a monolithic manner, which is used as a photoanode, and the rotating shaft of the photoanode is connected with the motor.

[0034] 2) The photoanode is placed in a semi-arc reaction tank, the rotating shaft of the photoanode is at the water surface of the wastewater, so t...

Embodiment 2

[0042] Dye Wastewater Treatment by Different Processing Methods in Tapered Anode Rotary Disk Liquid Film Reactor

[0043] Such as figure 1 As shown, the treatment object is different concentrations of rhodamine B (pH2.5, 1.0g / LNa 2 SO 4 ) to simulate dye wastewater. The waste water volume was 120ml.

[0044] The steps are the same as in Example 1, wherein the photoanode used is a 1:3 pointed cone photoanode, and the rotating speed is 80rpm. After 1 hour, the sample is analyzed to measure the absorbance of rhodamine B at 563nm, and the chromaticity removal rate (%) is obtained, and the results are as follows :

[0045] Processing method of pointed cone

[0046] From the above results, it can be seen that both methods can achieve effective pointed cone structures, but the die stamping method is faster in mass production.

Embodiment 3

[0048] Treatment of Dye Wastewater by Tapered Anode Rotary Disk Liquid Film Reactor with Different Membrane Production Methods

[0049] Such as figure 1 As shown, the treatment object is different concentrations of rhodamine B (pH2.5, 1.0g / LNa 2 SO 4 ) to simulate dye wastewater. The volume of waste water is 120m1.

[0050] The steps are the same as in Example 1, wherein the photoanode used is a 1:3 pointed cone photoanode, and the rotating speed is 80rpm. After 1 hour, the sample is analyzed to measure the absorbance of rhodamine B at 563nm, and the chromaticity removal rate (%) is obtained, and the results are as follows :

[0051] Different film making methods

[0052] It can be seen from the above results that different film-making methods have better removal effects, but the effects are slightly different due to different production methods.

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Abstract

The invention discloses a potoelectrocatalysis method of a photocathode photoelectric turntable with a pointed cone structure for treating organic waste water, comprising the following steps of: processing a stainless steel disk or a titanium disk as a substrate into a pointed cone structure; loading a TiO2 photocatalyst on the substrate and forming a photoelectric turntable on a rotating shaft to be used as the photocathode, wherein the rotating shaft of the photocathode is connected with a motor; placing a Cu sheet as the cathode at the inner wall of a reaction tank opposite to the photocathode and connecting the Cu sheet with the cathode of a direct current power supply; forming a liquid film on the surface of the photocathode; radiating the photocathode by using an exciting light source to allow the exciting light to radiate to the surface of the photocathode through the liquid film; and sampling and analyzing effluent, measuring the removal rate of organic matters in waste water and finishing the treatment on the organic waste water difficult to degrade. The invention greatly reduces the absorption of the organic waste water on the light, improves the utilization rate of the exciting light and the degradation efficiency of potoelectrocatalysis, increases the surface area of the photocathode, strengthens the mass transfer and improves the degradation efficiency of light (electric) catalysis.

Description

technical field [0001] The invention relates to a photoelectric catalysis method in the technical field of chemical industry, in particular to a photoelectric catalysis method for treating organic waste water with a tapered structure photoanode photoelectric turntable. Background technique [0002] In recent years, TiO 2 It has been proven to be a highly efficient, stable, non-selective and readily available semiconductor photocatalyst. TiO 2 As an advanced oxidation technology, photocatalysis can almost completely mineralize pollutants in air and water. Since Fujishima discovered TiO in 1972 2 Since the photocatalytic splitting of water, TiO 2 Semiconductor photocatalysis technology has gradually been extensively studied in the treatment of organic matter. To solve TiO 2 Difficult to separate from wastewater, TiO 2 are immobilized on various supports, due to TiO 2 Immobilization will cause its surface area to decrease and thus its photocatalytic activity to decrease...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/32C02F1/72
CPCY02W10/37
Inventor 贾金平李侃阳陈王亚林
Owner SHANGHAI JIAO TONG UNIV