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Visible-light response type photocatalysis wastewater fuel cell, manufacture method thereof and application thereof

A fuel cell and visible light technology, used in fuel cells, battery electrodes, energy and wastewater treatment, etc., can solve problems such as the inability to support the stable operation of the battery system, the inability to meet the long-term stable operation, and the sharp increase in the cost of photocatalytic fuel cells. The effect of good photocatalytic performance, good visible light response, significant organic degradation performance and power generation performance

Inactive Publication Date: 2013-10-23
SHANGHAI JIAO TONG UNIV
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  • Summary
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  • Description
  • Claims
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Problems solved by technology

However, the existing photocatalytic fuel cells still have obvious defects. On the one hand, TiO 2 The photocatalytic wastewater fuel cell whose semiconductor material is the photoanode can only use ultraviolet light, which leads to a narrow range of sunlight utilization by the photocatalytic fuel cell, although through TiO 2 Semiconductor materials and narrow bandgap semiconductors such as CdS, Cu 2 The composite of O etc. ("Nanotube Array Fuel Cell Responsive to Visible Light", Chinese Patent Application No.: 201110203146.2) realizes the response to visible light, but CdS, Cu 2 O and other compound semiconductors are easily oxidized or reduced and deactivated, resulting in poor stability of

Method used

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  • Visible-light response type photocatalysis wastewater fuel cell, manufacture method thereof and application thereof
  • Visible-light response type photocatalysis wastewater fuel cell, manufacture method thereof and application thereof

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preparation example Construction

[0028] The preparation method of the visible light-responsive photocatalytic waste water fuel cell of the present invention, it comprises:

[0029] 1) To prepare the platinum-modified silicon cell photocathode, the method is: weld copper wires on the back field of a cleaned commercial silicon cell, and then use insulating epoxy resin on the back field of the silicon cell Seal, after sealing, take the silicon cell as the working electrode and place it in a 2 PtCl 6and 0.1M sodium sulfate in 1M sulfuric acid solution, using platinum electrode as the counter electrode, controlling the working voltage to -0.5V, and the electrodeposition time is 30min, to carry out the platinum modification of the silicon battery sheet, and the silicon battery sheet modified by platinum with distilled water Repeated soaking to remove surface residues, and then drying to obtain a platinum-modified silicon cell photocathode.

[0030] 2) Prepare the WO 3 / W nanohole array photoanode, the method is:...

Embodiment 1

[0035] Firstly, copper wires are welded on the back field of the cleaned commercial silicon cell, and the back field of the silicon cell is sealed with insulating epoxy resin, and then the treated silicon cell is used as the working electrode, placed in a 10mM K 2 PtCl 6 and 0.1M sodium sulfate and 1M sulfuric acid solution, with a platinum electrode as the counter electrode, the operating voltage is controlled at -0.5V, and the electrodeposition time is 30min. The treated silicon cell is repeatedly soaked in distilled water to remove the residue on the product surface. Then dry it to obtain the platinum catalyst-modified silicon cell photocathode.

[0036] Use the cleaned metal tungsten plate as the anode, place it in 0.1M sodium sulfate solution containing 0.5% sodium fluoride, use the platinum electrode as the counter electrode, and control the voltage increase rate to 1V s -1 , stabilized at 50V for 30 minutes to obtain the initial material of the tungsten-based tungsten ...

Embodiment 2

[0046] Using platinum-modified silicon cells as photocathode 2, WO 3 / W nanopore array is photoanode 1, photocathode 2 and photoanode 1 are respectively inserted into 0.05M sodium sulfate solution containing 5mg / L methylene blue, and connected through external circuit 3. Turn on the simulated sun light source (the light intensity is 100mW cm -2 ) to irradiate photoanode 1 and photocathode 2, and continue to pass air near photocathode 2. At this time, the oxygen in the air combines with photogenerated electrons generated by photocathode 2, methylene blue is oxidized near photoanode 1, and photoanode 1 generates The photo-generated electrons are transmitted to the photocathode 2 through the external circuit 3 and combined with the photo-generated holes generated by it, and at the same time realize the degradation and power generation of methylene blue. The visible light-responsive photocatalytic waste water fuel cell of the present invention can remove almost all methylene blue...

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Abstract

The invention provides a visible-light response type photocatalysis wastewater fuel cell which comprises a platinum-modified silicon battery piece photo-cathode, a WO3/W nano-aperture array photo-anode, organic wastewater, a visible-light light source, an electrolyte solution, a quartz reaction pool and an air vent, wherein the materials of the photo-anode and the photo-cathode can directly respond the visible-light irradiation and generate photo-induced charges, the photo-anode and the photo-cathode are respectively inserted into 0.05-0.4M of organic wastewater-containing sodium sulfate electrolyte solution, and are communicated with each other by an external circuit, the light-resource is turned on for irradiation, and air is continuously introduced into the air vent nearby the photo-cathode, electrons of the photo-cathode are combined with the oxygen in air, the organic pollutant is oxidized nearby the photo-anode, and the photo-generated electrons generated by the photo-anode are transferred to the photo-cathode through the external circuit and are combined with photo-generated electron holes. The visible-light response type photocatalysis wastewater fuel cell provided by the invention can be used for treating the wastewater and recovering the electric energy, has the advantages of being good in optical absorption property and organic matter degradation property, high in yield, good in stability, long in service life and low in cost, and is wide in application prospect.

Description

technical field [0001] The invention relates to a bipolar-driven visible light-responsive photocatalytic wastewater fuel cell and a preparation method and application thereof, belonging to the field of organic pollutant disposal and resource utilization. Background technique [0002] The rapid development of modern industry has caused a large amount of toxic and harmful organic pollutants to be discharged into the water environment, causing serious pollution. However, the organic components in sewage are still important resources and energy. The treatment process of organic pollutants includes at least two processes, namely, the degradation of organic matter and the release of chemical energy of organic matter. It is of great significance to develop a clean and efficient organic wastewater treatment technology and realize the comprehensive utilization of organic chemical energy. [0003] Using organic wastewater as a resource, using the principle of chemical primary batteri...

Claims

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Application Information

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IPC IPC(8): H01M4/86H01M4/88H01M4/90H01M8/06C02F1/30
CPCY02E60/50Y02P70/50Y02W10/37
Inventor 周保学陈全鹏白晶殷伟平张先智
Owner SHANGHAI JIAO TONG UNIV
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