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Photocatalytic wastewater fuel cell capable of strengthening free radical reaction, and preparation method and application of photocatalytic wastewater fuel cell

A fuel cell and free radical technology, used in fuel cell control, fuel cells, fuel cell additives, etc., can solve the problem that the specific surface area of ​​the electrode cannot be increased infinitely and depends on the specific surface area of ​​the electrode, etc., and achieves degradation of organic pollutants. The effect of power generation capacity improvement, performance improvement and cost reduction

Active Publication Date: 2017-01-04
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

However, the free radical reaction for degrading organic pollutants in the existing photocatalytic fuel cells mainly occurs on the surface of the photoanode or cathode, which leads to the performance of the existing photocatalytic fuel cell system to degrade organic matter heavily dependent on the specific surface area of ​​the electrode, while The specific surface area of ​​the electrode cannot be increased infinitely, which has become a technical bottleneck for improving the performance of the existing photocatalytic fuel cell system

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  • Photocatalytic wastewater fuel cell capable of strengthening free radical reaction, and preparation method and application of photocatalytic wastewater fuel cell
  • Photocatalytic wastewater fuel cell capable of strengthening free radical reaction, and preparation method and application of photocatalytic wastewater fuel cell
  • Photocatalytic wastewater fuel cell capable of strengthening free radical reaction, and preparation method and application of photocatalytic wastewater fuel cell

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preparation example Construction

[0044] The preparation method of the photocatalytic waste water fuel cell of strengthening free radical reaction of the present invention, it comprises the steps:

[0045] 1) The photoanode 1 is traditional TiO 2 Nanotube array, its fabrication method is: use the cleaned metal titanium sheet as the anode, place in 0.5wt% hydrofluoric acid aqueous solution, use the platinum electrode as the counter electrode, and control the voltage increase rate to 1V s -1 , accompanied by magnetic stirring, anodized at 20V for 30min, and then the metal titanium sheet was taken out, rinsed with deionized water for 2 to 3 times, air-dried and placed in a muffle furnace, sintered at 450°C for 3h, and the temperature of the muffle furnace rose Both the rate and the rate of decline are 1°C min -1 , the required TiO can be obtained after sintering 2 Nanotube Array Photoanodes.

[0046] 2) The negative electrode 2 is a Pt / PVC (Pt modified Si solar cell) photocathode or a platinum black electrode,...

Embodiment 1

[0051] First, the cleaned metal titanium sheet is used as the anode, placed in 0.5wt% hydrofluoric acid aqueous solution, and the platinum electrode is used as the counter electrode, and the voltage increase rate is controlled to be 1V s -1 , accompanied by magnetic stirring, anodized at 20V for 30min, then the titanium sheet was taken out, rinsed with deionized water for 2 to 3 times, air-dried and placed in a muffle furnace, sintered at 450°C for 3h, the temperature rise rate of the muffle furnace and the rate of decline are both 1°C min -1 , the required TiO can be obtained after sintering 2 Nanotube Array Photoanodes.

[0052] Solder copper wires on the back field silver grid of the silicon cell, seal the entire back field with an epoxy resin-based adhesive to prepare a silicon cell (PVC) photocathode, and then use the PVC photocathode as a working electrode, at K 2 PtCl 6 0.5mol / LK with a content of 1mmol / L 2 SO 4 (with H 2 SO 4 Adjust the pH to 1) in the solution,...

Embodiment 2

[0063]TiO will be produced 2 The nanotube array is used as a photoanode 1, and the prepared Pt / PVC is used as a photocathode 2, which are respectively inserted into a 0.1M sodium sulfate electrolyte solution containing 20mg / L methylene blue, and 0.1mM ferrous ion 4 is added to the solution and the electrolyte The pH of the solution is adjusted to 4.0, and it is connected through an external circuit 3 . Turn on the simulated sun light source (the light intensity is 100mW cm -2 ) irradiation, the ferrous ion 4 and the free radicals and related substances generated on the surface of the photoanode 1 and the cathode 2 produce a Fenton-like cycle reaction under the self-bias of the photocatalytic fuel cell, thereby strengthening the free radical reaction in the system, A photocatalytic fuel cell can achieve a substantial improvement in the degradation of methylene blue and the ability to generate electricity.

[0064] The photocatalytic waste water fuel cell that strengthens the ...

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Abstract

The invention relates to a photocatalytic wastewater fuel cell capable of strengthening a free radical reaction. The photocatalytic wastewater fuel cell comprises a photo-anode, a cathode, persistent organic pollutant wastewater, a light source, an electrolyte solution, a quartz reaction pool and an air vent, wherein the photo-anode and the cathode are respectively inserted into the electrolyte solution, which contains the persistent organic pollutant wastewater, in the quartz reaction pool, and are connected by an external circuit; 0.1-0.4mM ferrous ions are added into the electrolyte solution, and the pH value is adjusted to be 1.0-4.0; the cathode is close to the air vent which is continuously filled with air; the light source is turned on for irradiating the photo-anode and the cathode; the ferrous ions have a Fenton-like circular reaction with free radicals and related substances which are generated on the surfaces of the photo-anode and the cathode under the automatic bias effect of the photocatalytic fuel cell, so that the free radical reaction in a system is strengthened, and the performance of the photocatalytic fuel cell is greatly improved. The invention provides a more efficient and economical wastewater treatment and energy recovery method, and has a wide application prospect.

Description

technical field [0001] The invention relates to a photocatalytic waste water fuel cell for strengthening free radical reaction, a preparation method and application thereof, and belongs to the field of organic pollutant disposal and resource utilization. Background technique [0002] The rapid development of modern industry has led to a large amount of toxic and harmful organic pollutants being discharged into the water environment, causing serious pollution. However, the organic components in sewage contain a large amount of energy, and even some refractory organic pollutants contain higher energy than some easily biodegradable organic substances. For example, 3050.6KJ mol can be released after phenol degradation -1 chemical energy, while glucose can only release 2808KJ mol -1 chemical energy. The development of a clean and efficient technology to treat organic pollutants in wastewater, especially refractory organic pollutants, is of great significance for the comprehens...

Claims

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Application Information

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IPC IPC(8): H01M8/04298H01M8/1016H01M8/06C02F1/30
CPCC02F1/30H01M8/04298H01M8/06H01M8/1016Y02E60/50Y02W10/37
Inventor 周保学赵凯曾庆意白晶李金花
Owner SHANGHAI JIAO TONG UNIV
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