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A system and method for determining the optimal value of water adsorption per unit photocatalyst in a photocatalytic reaction

A photocatalytic reaction and photocatalytic reactor technology, applied in the field of photocatalytic reaction, can solve the problems of low quantum efficiency, limiting the application of photocatalytic reaction, affecting the reaction activity and quantum efficiency of photocatalyst, and achieving easy operation and realization, improving The effect of reaction efficiency

Active Publication Date: 2021-07-23
WUHAN INST OF PHYSICS & MATHEMATICS CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the quantum efficiency of the current photocatalytic reaction is relatively low (the quantum efficiency of the highest known photocatalytic reaction can only reach 1%), which severely limits the application of photocatalytic reactions.
[0004] Through our research, we found that the amount of water adsorbed on the photocatalyst will affect the reactivity and quantum efficiency of the photocatalyst

Method used

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  • A system and method for determining the optimal value of water adsorption per unit photocatalyst in a photocatalytic reaction
  • A system and method for determining the optimal value of water adsorption per unit photocatalyst in a photocatalytic reaction
  • A system and method for determining the optimal value of water adsorption per unit photocatalyst in a photocatalytic reaction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 1. Select the first gas cylinder and the second gas cylinder that are equipped with nitrogen, select the hydrogen detector as the gas detector, and evenly disperse 1gP25 (Degussa titanium dioxide P25) photocatalyst on the bottom of the photocatalytic reactor;

[0037]2. Close the first interface, the second interface and the third interface of the three-way valve, open the second gas cylinder, the two-way valve and the second gas mass flow meter, and adjust the second gas mass flow meter so that the flow rate of nitrogen is 50ml / min, continuously feed nitrogen into the photocatalytic reactor for 12 hours, so that the water on the surface of the photocatalyst is washed and desorbed by high-purity nitrogen, and close the second gas cylinder, the two-way valve and the second gas mass flow meter;

[0038] 3. Open the first interface, the third interface, the water bath heater, the first gas cylinder and the first gas mass flowmeter, adjust the temperature of the water bath ...

Embodiment 2

[0045] 1. Select the first gas cylinder and the second gas cylinder that are equipped with carbon dioxide, select the methane detector as the gas detector, and evenly disperse the 1gP25 (Degussa titanium dioxide P25) photocatalyst on the bottom of the photocatalytic reactor;

[0046] 2. Close the first interface, the second interface and the third interface of the three-way valve, open the second gas cylinder, the two-way valve and the second gas mass flow meter, and adjust the second gas mass flow meter so that the flow rate of carbon dioxide is 50ml / min, continue to feed carbon dioxide into the photocatalytic reactor for 12 hours, so that the water on the surface of the photocatalyst is washed and desorbed by high-purity carbon dioxide, and the second gas cylinder, the two-way valve and the second gas mass flow meter are closed;

[0047] 3. Open the first interface, the third interface, the water bath heater, the first gas cylinder and the first gas mass flowmeter, adjust th...

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Abstract

The invention discloses a system and method for determining the optimal value of water absorbed by a unit photocatalyst in a photocatalytic reaction. The system includes a photocatalytic reaction device, an eluting device, a water vapor supply device, an emptying pipe and a three-way valve. The photocatalytic reaction device is used for photocatalytic reaction and detection of the amount of product gas produced. The elution device is used to elute the water carried by the photocatalyst itself. The water vapor supply device provides water vapor raw material gas for the photocatalytic reaction. The emptying pipe is used to discharge The water vapor provides the oxygen carried by the device itself. The system is simple in structure and easy to operate. The method is based on the system, is simple and easy to implement, and can determine the optimal value of the amount of water absorbed by the photocatalyst in the photocatalytic reaction, so that the photocatalytic reaction can be carried out with the best reaction activity and quantum efficiency.

Description

technical field [0001] The invention relates to the technical field of photocatalytic reaction, in particular to a system and method for determining the optimum value of water absorbed by unit photocatalyst in photocatalytic reaction. Background technique [0002] In the 21st century, the energy problem has become a major challenge on the road of human development. Traditional non-renewable energy sources such as coal and petroleum not only have the problem of pollution, but also the problem of energy depletion is imminent. [0003] Photocatalytic technology can convert CO 2 Revert to CH 4 , splitting water into H 2 and O 2 , effectively convert solar energy into chemical energy, and provide clean energy fuels for human beings. Therefore, photocatalytic technology has attracted great interest from scientific researchers. However, the quantum efficiency of the current photocatalytic reaction is relatively low (the quantum efficiency of the highest known photocatalytic re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N5/04
CPCG01N5/045
Inventor 冯宁东杨龙霄邓风
Owner WUHAN INST OF PHYSICS & MATHEMATICS CHINESE ACADEMY OF SCI