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Photocatalysis system and application thereof

A catalytic system and photocatalyst technology, applied in the field of photocatalysis, can solve the problems of difficulty in improving photosynthetic efficiency, separation and purification, etc., and achieve the effect of breaking through the kinetic speed bottleneck, reducing operating costs and improving efficiency

Active Publication Date: 2021-11-09
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The perfluorinated solvent remains unchanged during the reaction process due to its excellent chemical stability and can be recycled, thus solving the problem of H2O caused by the low concentration of dissolved oxygen in the prior art. 2 o 2 It is difficult to improve the photosynthetic efficiency, and the generated H 2 o 2 Technical problems such as separation and purification difficulties

Method used

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  • Photocatalysis system and application thereof
  • Photocatalysis system and application thereof
  • Photocatalysis system and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] This embodiment provides a photocatalytic system and its 2 o 2 For applications in photosynthesis, please refer to the photocatalytic system figure 1 and Figure 6 ,specifically:

[0034] Add 2ml of perfluorooctane into the quartz reactor, expose it to oxygen until the concentration of dissolved oxygen reaches saturation, add a certain amount (1mg, 2mg, 4mg, 6mg) of hydrophobic photocatalyst Pd-A-BiVO 4 , and then add a certain volume (1ml, 2ml, 4ml, 6ml) of pure aqueous solution. The entire system controls the reaction temperature to 0°C through an ice-water bath, and under the action of magnetic stirring and LED light source, the photocatalytic production of H begins. 2 o 2 React, take a sample after reacting for 1h, determine the generated H by titanium salt photometry 2 o 2 concentration.

[0035] results and analysis:

[0036] Analyze the results of the photocatalytic system provided in this example: the fluorocarbon phase / water phase system mentioned belo...

Embodiment 2

[0043] This embodiment provides a photocatalytic system and its 2 o 2 Applications in photosynthesis, specifically:

[0044] Add 4ml of perfluorohexane into the quartz reactor, expose it to oxygen until the dissolved oxygen concentration reaches saturation, add 4mg of hydrophobic photocatalyst COF A+C , and then add 2 ml of pure aqueous solution. The whole system controls the reaction temperature to 10°C through a water bath, and under the action of magnetic stirring and LED light source, the photocatalytic production of H begins. 2 o 2 React, take a sample after reacting for 1h, determine the generated H by titanium salt photometry 2 o 2 concentration.

[0045] The H obtained by reacting for 1h 2 o 2 The concentration is 12.1mM.

Embodiment 3

[0047] This embodiment provides a photocatalytic system and its 2 o 2 Applications in photosynthesis, specifically:

[0048] Add 5ml of perfluorodecalin into the quartz reactor, expose it to oxygen until the dissolved oxygen concentration reaches saturation, add 3mg of hydrophobic photocatalyst OPA / Zr 92.5 Ti 7.5 -MOF, and then add 5ml of pure aqueous solution. The whole system controls the reaction temperature to 25°C through a water bath, and under the action of magnetic stirring and LED light source, the photocatalytic production of H begins. 2 o 2 React, take a sample after reacting for 1h, determine the generated H by titanium salt photometry 2 o 2 concentration.

[0049] The H obtained by reacting for 1h 2 o 2 The concentration is 5.5mM.

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Abstract

The invention discloses a photocatalysis system and application thereof. The photocatalysis system comprises a water phase positioned on the upper layer, a fluorocarbon phase positioned on the lower layer and a photocatalyst positioned at the interface of the water phase and the fluorocarbon phase, wherein the photocatalyst is a hydrophobic photocatalyst, and the fluorocarbon phase is a perfluoro solvent. Oxygen is efficiently dissolved by utilizing the extremely strong dissolving capacity of the perfluoro solvent to gas, the hydrophobic photocatalyst can reduce high-concentration dissolved oxygen in a fluorocarbon phase under illumination to generate H2O2, and the generated H2O2 can be automatically separated into a water phase, so that a high-concentration pure H2O2 water solution is directly obtained. Therefore, the problem of low yield caused by low dissolved oxygen concentration due to the fact that oxygen is generally dissolved in an aqueous solution in the prior art is solved; furthermore, the perfluorinated solvent is insoluble in water, the water-soluble reaction product H2O2 can be automatically separated to enter a water phase, and the problem of purification of subsequent reaction products is solved. Therefore, the efficient photosynthesis and in-situ separation of H2O2 are realized.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, and more specifically relates to a photocatalysis system and its application. Background technique [0002] Hydrogen peroxide (H 2 o 2 ) as an important basic chemical and a green high-energy oxidant are widely used in the fields of chemical synthesis, paper bleaching, medicine and hygiene, and environmental governance. At present, industrially synthesized H 2 o 2 The traditional anthraquinone method is mainly used, which consumes a lot of energy and produces highly toxic by-products, which does not meet the development requirements of green chemistry. Artificial photosynthesis, that is, the reaction of oxygen and water to synthesize H under the drive of sunlight 2 o 2 The method, which was first proposed by Australian scientists in the 1980s, is considered to be H 2 o 2 Synthesize the most promising methods. [0003] h 2 o 2 At present, the research on photosynthesis technology...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B15/027
CPCC01B15/027Y02W10/37
Inventor 张延荣孙明辉
Owner HUAZHONG UNIV OF SCI & TECH
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