Method and device for preparing hydrogen based on photoelectric degradation organic pollutant driven by visible light

A technology for organic pollutants, photoelectric degradation, applied in chemical instruments and methods, hydrogen, inorganic chemistry, etc., to achieve the effects of compact equipment, energy saving, and simple device operation

Inactive Publication Date: 2012-12-19
ZHEJIANG GONGSHANG UNIVERSITY
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  • Claims
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Problems solved by technology

The invention integrates the concepts of dye-sensitized solar cells and fuel cells into the same battery device. Although it can use dyes to absorb solar energy and convert it into electrical energy, and at the same time degrade organic matter in industrial production waste liquid to generate hydrogen energy, this hybrid battery is in In the same reaction cell, it is necessary to degrade organic matter in ind

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  • Method and device for preparing hydrogen based on photoelectric degradation organic pollutant driven by visible light

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Embodiment 1

[0040] Reaction device based on visible light type BiVO 4 The material is the anode, and the platinum sheet is used as the cathode. The distance between the cathode and anode is adjusted to 2cm. A 500W adjustable xenon arc lamp is placed 5cm away from the reactor as the light source, and a cut-off filter is used to obtain visible light. The photocatalytic primary cell contains a certain concentration of redox couple mixed solution, the reaction equation: .

[0041] By optimizing the redox couple concentration, solution pH value, visible light intensity, etc., the system generates a bias voltage above 1.2V to study the interaction between the visible light catalyst and the redox couple. Taking hydroquinone as the simulated pollutant, 0.01M hydroquinone and 0.1M Na 2 SO 4 For aqueous solution, depending on the electrode material, the photocatalytic hydrogen production reaction cell needs a bias voltage of about 0.8V to degrade pollutants and produce hydrogen. In this way, t...

Embodiment 2

[0044] Visible light-type Fe 2 o 3 The material is the anode, the platinum sheet is used as the cathode, hydroquinone is used to simulate organic wastewater, and NaI and NaIO are used to 3 The mixed solution acts as a redox couple. Argon was used as the carrier gas to remove the air in the reactor. A 500W xenon arc lamp was placed 5cm away from the reactor as a light source, and a cut-off filter was used to obtain visible light. After irradiating the anode material, turn on the magnetic stirrer after 15 minutes, and control the rotating speed at 500r / min. The head air of the reactor was extracted to detect and analyze the hydrogen content. The concentration changes of organic pollutants and their degradation intermediates in wastewater were determined by high performance liquid chromatography. After 60 minutes of treatment, by detection and analysis, the degradation rate of hydroquinone was 86%, and the hydrogen generation was 220 μmol, 3.67 μmol / min.

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Abstract

The invention discloses a method and a device for preparing hydrogen based on a photoelectric degradation organic pollutant driven by visible light; the device comprises a reactor, a hydrogen collection device and a light source; the bottom of the reactor is provided with a magnetic stirrer; the inside of the reactor is divided into a photocatalysis primary cell and a photocatalysis hydrogen pool which are independent from each other; a plurality of first photocatalysis electrode pairs are arranged in the photocatalysis primary cell; a plurality of second photocatalysis electrode pairs are arranged in the photocatalysis hydrogen pool; the first photocatalysis electrode pairs and the second photocatalysis electrode pairs are mutually connected serially to form a loop; and magnetons are arranged in the photocatalysis primary cell and the photocatalysis hydrogen pool. According to the method and the device for preparing hydrogen based on the photoelectric degradation organic pollutant driven by visible light, two clean technologies of preparing hydrogen by water electrolysis and preparing hydrogen by degrading the pollutant through solar photocatalysis are coupled, no external power supply is needed, meanwhile the degradation of the organic pollutant and the hydrogen preparation are realized, the hydrogen preparation efficiency is high, and the cost is low.

Description

technical field [0001] The invention relates to the fields of new energy technology and water treatment technology, in particular to a method and device for hydrogen production based on visible light-driven double n-type semiconductor photoelectric degradation of organic pollutants. Background technique [0002] Energy shortage and environmental pollution are two major problems faced by human beings, and finding sustainable and clean alternative energy sources has become a global urgent matter. As a secondary energy source, hydrogen has high energy density and clean combustion, and is recognized as the most ideal alternative energy source for fossil fuels. At present, there are two main methods for producing hydrogen: one is to produce water gas by reacting with water vapor from fossil energy, and then it is obtained through conversion and purification processes; the other widely used and mature method is electrolysis of water Hydrogen production. Fossil fuel hydrogen prod...

Claims

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Application Information

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IPC IPC(8): C01B3/22
Inventor 丛燕青金晓林孙爱芸丁卫徐刘亚莉吴俊彦王齐
Owner ZHEJIANG GONGSHANG UNIVERSITY
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