Carbonate radical photocatalytic wastewater power generation method

A free radical and carbonate technology, applied in the field of carbonate radical photocatalytic wastewater power generation, can solve the problems affecting the efficiency of photocatalytic wastewater fuel cells, limiting the active concentration of hydroxyl radicals, etc.

Active Publication Date: 2022-03-15
SHANGHAI JIAOTONG UNIV
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  • Claims
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Problems solved by technology

However, the existing photocatalytic wastewater fuel cells mainly rely on hydroxyl radicals to degrade organic pollutants, which are easily quenched and have a fast recombination rate, which limits the active concentration of hydroxyl radicals in the reaction system and affects Further improvement in the efficiency of photocatalytic wastewater fuel cells

Method used

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  • Carbonate radical photocatalytic wastewater power generation method
  • Carbonate radical photocatalytic wastewater power generation method
  • Carbonate radical photocatalytic wastewater power generation method

Examples

Experimental program
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Embodiment 1

[0029] This embodiment includes the following steps:

[0030] Step 1) Specific preparation of the photoanode: 0.4M KI is dissolved in 50mL deionized water, the pH is adjusted to 1.7 with 1M nitric acid, then 0.04M bismuth nitrate is dissolved in it, followed by dissolving 0.23M p-benzoquinone Pour 20mL of ethanol solution into it, stir well and set aside. Use the Ag / AgCl electrode as the reference electrode, platinum as the counter electrode, and the cleaned FTO as the working electrode, put it into the above solution, and then deposit the BiOI film at a constant potential -0.1V for 15 minutes, then wash and dry the film stand-by. Then configure 0.2M vanadyl acetylacetonate DMSO solution, add it dropwise on the above film, and then soak it in 1M NaOH for 30 minutes after calcining at 450°C.

[0031] Step 2) Concrete preparation of the photocathode: prepared by the method of photoelectric deposition, the specific method is as follows: with a commercially available silicon bat...

Embodiment 2

[0036] Compared with Example 1, in this example, the concentration of bicarbonate is reduced to 0.05M, and at the same time, 0.05M sodium sulfate is supplemented to maintain the electrolyte concentration required for conduction. After 120 minutes, the removal rate of methylene blue can reach 85.6%. The short-circuit current density can reach 1.36mA / cm 2 .

Embodiment 3

[0038] Compared with Example 1, in this example, the pH of the organic wastewater is adjusted to 6.2, the removal rate of methylene blue can reach 65.8% after 120 minutes, and the short-circuit current density of the external output can reach 0.95mA / cm 2 .

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Abstract

A carbonate radical photocatalytic wastewater power generation method, using a solution containing organic wastewater and bicarbonate as the electrolyte, a conductive glass-based nano-film of bismuth vanadate as the photoanode, and a gold-modified polysilicon cell as the photocathode. Photogenerated electrons and photogenerated holes are generated when the photoanode and photocathode are illuminated by a simulated light source. The photogenerated holes oxidize bicarbonate ions on the surface of the photoanode to generate percarbonate radicals, which are then converted into carbonate radicals. The photogenerated electrons are generated on the surface of the photocathode. Reduce oxygen to generate hydrogen peroxide, and then generate hydroxyl radicals, which undergo a quenching reaction with bicarbonate to generate carbonate radicals; the above-mentioned carbonate radicals react to oxidize organic pollutants in the battery system, thereby realizing waste water fuel The battery efficiently purifies sewage and generates electricity externally. The invention can significantly improve the performance of the fuel cell system in degrading organic pollutants and simultaneously producing energy.

Description

technical field [0001] The invention relates to a technology in the field of fuel cells, in particular to a method for generating electricity from carbonate free radical photocatalyzed waste water. Background technique [0002] Photocatalytic wastewater fuel cell, as a wastewater treatment device that utilizes the strong oxidizing power of photocatalysis to oxidize organic pollutants in wastewater, can recover a large amount of chemical energy contained in organic matter while treating organic wastewater, and has received more and more attention. more and more researchers' attention. However, the existing photocatalytic wastewater fuel cells mainly rely on hydroxyl radicals to degrade organic pollutants, which are easily quenched and have a fast recombination rate, which limits the active concentration of hydroxyl radicals in the reaction system and affects Further improvement in the efficiency of photocatalytic wastewater fuel cells. Contents of the invention [0003] A...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/08C02F1/461
CPCH01M8/08C02F1/46176C02F2305/10C02F2101/308Y02E60/50
Inventor 周保学夏丽刚白晶李金花陈飞杨周廷生王嘉琛周昌辉梅晓杰方菲周梦暘
Owner SHANGHAI JIAOTONG UNIV
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