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Method for treating photoelectrocatalysis of organic wastewater through sharply-structured light anode and photoelectricity rotary disc

A technology of organic wastewater and photoelectric catalysis, applied in chemical instruments and methods, light water/sewage treatment, energy wastewater treatment, etc., can solve the problem of excitation light waste, and achieve the effect of increasing the surface area, making full use of it, and improving the utilization rate.

Active Publication Date: 2011-03-30
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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  • Method for treating photoelectrocatalysis of organic wastewater through sharply-structured light anode and photoelectricity rotary disc
  • Method for treating photoelectrocatalysis of organic wastewater through sharply-structured light anode and photoelectricity rotary disc
  • Method for treating photoelectrocatalysis of organic wastewater through sharply-structured light anode and photoelectricity rotary disc

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Dye wastewater was treated by rotary disk liquid film reactor with wedge-shaped anodes with different bottom-to-height ratios, and a planar photoanode was used as a comparative example.

[0032] Such as figure 1 with 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 plate disc as the base, use the wire cutting method to process the plane disc base into a base with a width of 2 mm and a height of 2-8 mm (that is, the ratio of base to height is 1:1-1:4). 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 that the photoano...

Embodiment 2

[0042] Treatment of dye wastewater by different processing methods in rotary disk liquid film reactor with wedge-split anode

[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 wedge photoanode, and the rotating speed is 100rpm. After 1 hour, the sample is analyzed to measure the absorbance of rhodamine B at 563nm, and the chromaticity removal rate (%) is obtained. The results are as follows :

[0045] The processing method of wedge

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

Embodiment 3

[0048] Treatment of Dye Wastewater by Different Membrane Production Methods in a Rotary Disk Liquid Membrane Reactor with Split Anodes

[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 waste water volume was 120ml.

[0050] The steps are the same as in Example 1, wherein the photoanode used is a 1: 3 wedge photoanode, and the rotating speed is 100rpm. After 1 hour, the sample is analyzed to measure the absorbance of rhodamine B at 563nm, and the chromaticity removal rate (%) is obtained. 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 method for treating photoelectrocatalysis of organic wastewater through sharply-structured light anode and photoelectricity rotary disc, comprising the following steps: processing a stainless steel round disc or titanium disc taken as a substrate into an pointed cone structure; loading TiO2 photochemical catalyst on the substrate, forming a photoelectricity rotary disc on a rotary shaft to serve as a light anode, wherein the rotary shaft of the light anode is in connection with a motor; placing a Cu piece taken as a cathode on the inner wall of a reaction slot opposite to the light anode, and connecting the cathode with the cathode of a direct current power supply through a wire; forming a liquid membrane on the surface of the light anode; irradiating the light anode with an excitation light source and irradiating excitation light on the surface of the light anode through the liquid membrane; and sampling and analyzing yielding water, and measuring removal rate of the organic matter in wastewater, thus finishing treatment for the organic wastewater which is hard to degrade. By utilizing the method, absorption of the organic wastewater for light is greatly reduced, the utilization rate of excitation light and the degradation efficiency of the photoelectrocatalysis are improved, the surface size of the light anode is increased, mass transfer is enhanced and the degradation efficiency of photoelectrocatalysis is improved.

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 wedge 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): C02F1/30C02F1/461C02F1/32
CPCY02W10/37
Inventor 贾金平李侃阳陈王亚林康迪
Owner SHANGHAI JIAO TONG UNIV