Method for generating ozone based on a single-atom catalyst and ozone generation device

Abstract

The present disclosure provides a method and an ozone generation device based on a single-atom catalyst, wherein the ozone generation method comprises: contacting an oxygen-containing gas with metal active sites on the surface of a single-atom catalyst, and then delivering the oxygen-containing gas into an ultraviolet ozone generation module of a reaction chamber; and generating ozone gas in the ultraviolet ozone generation module under ultraviolet light irradiation.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of ozone preparation, in particular to a method for generating ozone based on a monatomic catalyst and an ozone generation device. BACKGROUND

[0002] Ozone is an allotrope of oxygen, has strong oxidizing properties, can be reduced to oxygen at room temperature, has no odor and no pollution, and thus has significant effects in oxidation, decolorization, odor removal, etc. In recent years, ozone has had increasing social demand in the fields of drinking water sterilization and disinfection, food, air purification, chemical production, medicine, etc.

[0003] At present, common ozone generation methods mainly include chemical method, electrolysis method, ultraviolet light method, cold plasma method, etc. However, the existing ozone generation methods still have many problems, for example: most ozone generation technologies need high-voltage (1 kv) electric field or ultraviolet light energy input, need higher energy consumption, leading to increased operating costs. Ozone generation consumes a large amount of oxygen and has low efficiency, generally only 5%-10% of production efficiency. In addition, the generation amount of ozone is also affected by various factors such as temperature, humidity, oxygen purity, etc., so it is also impossible to guarantee stable ozone generation amount.

[0004] In summary, there is an urgent need to provide an ozone generation method that can improve ozone generation rate and ozone yield, while generating ozone uniformly and reducing energy consumption. SUMMARY

[0005] Therefore, the present disclosure proposes a method for generating ozone based on a monatomic catalyst and an ozone generation device, in order to at least partially solve the above technical problems.

[0006] In an aspect of the present disclosure, a method for generating ozone based on a monatomic catalyst is provided, comprising:

[0007] contacting an oxygen-containing gas with metal active sites on the surface of a monatomic catalyst, and then delivering the oxygen-containing gas into an ultraviolet ozone generation module of a reaction chamber;

[0008] generating ozone gas in the ultraviolet ozone generation module under ultraviolet light irradiation.

[0009] According to an embodiment of the present disclosure, the method further comprises:

[0010] controlling the temperature of the reaction chamber to maintain the temperature of the reaction chamber at 20-25℃, and collecting the generated ozone gas by using a collection module.

[0011] According to an embodiment of the present disclosure, the oxygen-containing gas is stopped to be delivered and the ultraviolet light irradiation is stopped after 5-10 minutes, in the case that the ozone concentration in the collecting module reaches a threshold value, the threshold value being 10% of the target value of the ozone concentration.

[0012] According to an embodiment of the present disclosure, the oxygen concentration in the oxygen-containing gas is higher than 90%.

[0013] According to an embodiment of the present disclosure, the monatomic catalyst is composed of a carrier and a metal catalytic material formed on the carrier, the metal catalytic material exists in the form of single atom, the metal catalytic material is selected from Pt or Cu, and the carrier is selected from any one of Al2O3, SiO2 or TiO2.

[0014] The shape of the carrier is selected from a conical shape.

[0015] According to an embodiment of the present disclosure, the monatomic catalyst is formed by the following steps:

[0016] The metal catalytic material is dispersed on the carrier by an impregnation method.

[0017] According to an embodiment of the present disclosure, the speed and concentration of the ozone generation are controlled by controlling the rate of the oxygen-containing gas delivery and / or the intensity of the ultraviolet light irradiation.

[0018] In another aspect of the present disclosure, an ozone generation device based on monatomic catalysis is provided, the device comprising:

[0019] a reaction chamber, an inside of the reaction chamber is provided with a gas supply module, a monatomic catalyst module and an ultraviolet ozone generation module, the gas supply module is used to provide the oxygen-containing gas to the ultraviolet ozone generation module via the monatomic catalyst module, the monatomic catalyst module is used to reduce the activation energy of the oxygen molecule decomposition and provide active sites, and the ultraviolet ozone generation module is used to generate ozone.

[0020] According to an embodiment of the present disclosure, the device further comprises:

[0021] a collecting module, arranged in the inside of the reaction chamber and connected with the ultraviolet ozone generation module, used to collect the ozone gas generated by the ultraviolet ozone generation module;

[0022] a cooling module, arranged in the inside of the reaction chamber, used to control the temperature in the reaction chamber;

[0023] an ozone detection module, arranged in the inside of the reaction chamber, used to detect the concentration of the ozone gas generated by the ultraviolet ozone generation module;

[0024] a safety system module, arranged outside the reaction chamber, used to detect the ozone concentration outside the reaction chamber and the safety of the ozone generation device; and

[0025] The control module is connected with the gas supply module and the ultraviolet ozone generation module, and is used for controlling the rate of the oxygen-containing gas in the gas supply module and the intensity of the power supply and the ultraviolet light source of the ultraviolet ozone generation module.

[0026] According to an embodiment of the present disclosure, the ultraviolet light source in the ultraviolet ozone generation module is selected from any one of an ultraviolet light emitting diode or an ultraviolet low-pressure mercury lamp;

[0027] The safety system module is selected from at least any two of a safety switch, an explosion-proof device, a gas leakage detector, a fire alarm, and an emergency shutdown assembly.

[0028] The method for generating ozone based on a single-atom catalyst and the ozone generation device provided by the present disclosure have the following beneficial effects, but are not limited to the following aspects:

[0029] (1) The method for generating ozone based on a single-atom catalyst provided by the present disclosure introduces a single-atom catalyst in the process of generating ozone, uses the metal active sites on the surface of the single-atom catalyst to fully contact with oxygen, reduces the activation energy of oxygen decomposition, and enables oxygen to be decomposed into oxygen atoms and recombined to form ozone gas under the stimulation of lower energy, thereby improving the reaction rate and selectivity. In addition, the single atoms in the single-atom catalyst are uniformly dispersed on the carrier with high surface area and chemical stability, which realizes the uniform distribution of the metal active sites and ensures that the metal active sites can fully contact with oxygen, which is conducive to realizing more uniform oxygen dissociation and recombination to generate ozone in the ultraviolet ozone generation module, and further helps to obtain ozone products with higher quality, which is suitable for various applications. In addition, the metal active sites on the single-atom catalyst have strong electron affinity and chemical reactivity, can form stable coordination compounds with reactants and intermediates, and promote the reaction. The single-atom catalyst also enables the ozone generation reaction to occur at a lower temperature, which helps to reduce energy consumption and reduce the related operation risks at a higher temperature and the impact on the environment.

[0030] (2) In the method for generating ozone based on a single-atom catalyst provided by the present disclosure, the metal active sites on the surface of the single-atom catalyst reduce the activation energy of oxygen decomposition, and cooperate with ultraviolet light irradiation to excite the decomposition of oxygen molecules, thereby improving the ozone generation rate and ozone yield under the joint action. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a flow chart of the method for generating ozone based on a single-atom catalyst in the present disclosure;

[0032] Figure 2 is a schematic diagram of the ozone generation device based on a single-atom catalyst in the present disclosure. DETAILED DESCRIPTION

[0033] To make the objectives, technical solutions, and advantages of this disclosure clearer, the following detailed description is provided in conjunction with specific embodiments.

[0034] The endpoints and any values ​​of the ranges disclosed in this disclosure are not limited to the precise ranges or values, and such ranges or values ​​should be understood to include values ​​close to such ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be regarded as specifically disclosed in this disclosure.

[0035] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this disclosure. The terms “comprising,” “including,” etc., as used herein indicate the presence of the stated features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

[0036] All terms used herein (including technical and scientific terms) have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein are to be interpreted in a manner consistent with the context of this specification, and not in an idealized or overly rigid way.

[0037] This disclosure, based on in-depth research into ozone generation methods, finds that commonly used methods in related technologies not only require high energy consumption but also cannot guarantee ozone generation efficiency and stable ozone generation levels.

[0038] This disclosure proposes a method and apparatus for generating ozone based on a single-atom catalyst. It utilizes ultraviolet light energy to excite oxygen molecules in conjunction with the metal active sites on the surface of the single-atom catalyst, accelerating the oxygen decomposition and ozone generation reactions, thereby increasing the ozone generation rate and yield, and contributing to the production of high-quality ozone products. The obtained ozone gas can be applied to various applications, such as water treatment and disinfection, which is of great significance to the development of ozone preparation technology.

[0039] Figure 1 This is a flowchart of the method for generating ozone based on a single-atom catalyst disclosed herein.

[0040] like Figure 1 As shown, the present disclosure proposes a method for generating ozone based on a single-atom catalyst, comprising the following steps S1 to S2:

[0041] Step S1: The oxygen-containing gas is brought into contact with the metal active sites on the surface of the single-atom catalyst and then transported into the ultraviolet ozone generation module in the reaction chamber.

[0042] Step S2: generating ozone gas in the UV-ozone generating module by UV irradiation.

[0043] According to the embodiments of the present disclosure, in the process of generating ozone, the metal active sites on the single-atom surface are in full contact with oxygen, which reduces the activation energy of oxygen decomposition. Meanwhile, the metal active sites on the surface of the single-atom catalyst promote the decomposition rate of oxygen molecules under UV irradiation, so that more uniform oxygen dissociation and recombination reactions for generating ozone are realized under lower energy stimulation, which accelerates the decomposition of oxygen and the generation of ozone, thereby improving the ozone generation rate and ozone yield. The mechanism of ozone generation can be expressed as: 3O2→2O3.

[0044] According to the embodiments of the present disclosure, the oxygen concentration in the oxygen-containing gas is higher than 90%, for example, it can be 91%, 93%, 95%, 98%, 99%, etc. Preferably, the present disclosure uses high-purity oxygen gas (99.999%) as the oxygen source to generate ozone, so as to improve the ozone concentration and yield, and at the same time avoid the generation of other impurity gases such as NO x By controlling the rate of oxygen-containing gas delivery and / or the intensity of UV irradiation, the speed and concentration of ozone generation can be controlled.

[0045] According to the embodiments of the present disclosure, the single-atom catalyst is composed of a carrier and a metal catalytic material formed on the carrier, wherein the metal catalytic material exists in the form of a single atom, and the metal catalytic material is selected from Pt or Cu. The metal catalytic material can provide active sites to reduce the decomposition activation energy of oxygen molecules. The carrier is selected from any one of Al2O3, SiO2 or TiO2. A carrier with high surface area and chemical stability is selected to ensure uniform dispersion of the catalyst and at the same time ensure sufficient reaction with oxygen. The shape of the carrier is selected from a conical shape. Oxygen can flow along the conical surface in the reaction, which helps to increase the contact area of the gas with the metal catalytic material, promote the reaction, and other carrier shapes with high specific surface area are also feasible. The single-atom catalyst can be obtained by dispersing the metal catalytic material on the carrier by impregnation, so that the metal catalytic material is uniformly dispersed on the carrier, ensuring uniform distribution of active sites, so that oxygen is in full contact with the metal catalytic material, thereby realizing more uniform oxygen dissociation and recombination reactions, and improving the effect of ozone generation.

[0046] According to the embodiments of the present disclosure, the method for generating ozone further comprises: collecting the generated ozone gas by using a collection module.

[0047] According to an embodiment of the present disclosure, in the case that the ozone concentration in the collecting module reaches a threshold value, the delivery of the oxygen-containing gas is stopped, and the ultraviolet light irradiation is stopped after 5-10 minutes, for example, the delivery of the oxygen-containing gas can be stopped after 5 minutes, 7 minutes, 8 minutes, 9 minutes, 10 minutes, wherein the threshold value is 10% of the target value of the ozone concentration. When the ozone concentration in the reaction chamber reaches the threshold value, the gas supply module is closed first, and the ultraviolet light is closed after a few minutes to consume all the remaining oxygen in the reaction chamber, thereby ensuring that the ozone generation reaction is completed and avoiding the generation of residual by-products to affect the quality of the generated ozone.

[0048] According to an embodiment of the present disclosure, a single-atom catalyst-based ozone generation device is also provided for performing the single-atom catalysis-based ozone generation method in the above-mentioned embodiments, wherein the ozone generation device comprises a reaction chamber, the inside of the reaction chamber is provided with a gas supply module, a single-atom catalyst module and an ultraviolet ozone generation module, the gas supply module is used to provide an oxygen-containing gas to the ultraviolet ozone generation module through the single-atom catalyst module, the single-atom catalyst module is used to reduce the activation energy of the decomposition of oxygen molecules and provide active sites, and the ultraviolet ozone generation module is used to generate ozone.

[0049] In an embodiment of the present disclosure, the gas supply module, the single-atom catalyst module and the ultraviolet ozone generation module are provided in the ozone generation device. The oxygen generated by the gas supply module contacts the metal active sites uniformly dispersed on the surface of the single-atom catalyst in the single-atom catalyst module, which can effectively reduce the activation energy of the decomposition of oxygen molecules and improve the rate of generating ozone gas from oxygen under ultraviolet light irradiation; at the same time, the ultraviolet light provided in the ultraviolet ozone generation module excites the decomposition of oxygen molecules, so that under the joint action of the single-atom catalyst and the ultraviolet light irradiation, the decomposition of oxygen and the generation of ozone are accelerated to obtain high-quality ozone products. In addition, the ozone generation device provided by the present disclosure has a simple structure and low catalyst cost, and can ensure stable ozone generation.

[0050] Figure 2 is a schematic diagram of the single-atom catalysis-based ozone generation device in an embodiment of the present disclosure.

[0051] As Figure 2As shown, the ozone generation device based on single-atom catalysis provided by the present disclosure comprises a reaction chamber 201, the inside of the reaction chamber 201 is provided with a gas supply module 202, a single-atom catalyst module 203 and an ultraviolet ozone generation module 204. The gas supply module 202, the single-atom catalyst module 203 and the ultraviolet ozone generation module 204 are connected in sequence. The gas supply module 202 is used to provide oxygen-containing gas to the ultraviolet ozone generation module 204 via the single-atom catalyst module 203, the single-atom catalyst module 203 is used to reduce the activation energy of oxygen molecule decomposition and provide active sites for contact with oxygen-containing gas, and the ultraviolet ozone generation module 204 irradiates the oxygen-containing gas passing through the single-atom catalyst to decompose oxygen to generate ozone gas.

[0052] According to the embodiment of the present disclosure, the single-atom catalyst module 203 provided in the ozone generation device is a single-atom catalyst, which is composed of a carrier and a metal catalytic material, and the metal catalytic material is uniformly dispersed on the carrier. The single-atom catalyst is used to reduce the activation energy of oxygen molecule decomposition to improve the reaction rate and selectivity, and to provide uniform metal active sites, which can accelerate the decomposition of oxygen and the generation of ozone. The ultraviolet ozone generation module 204 is used to provide ultraviolet light to excite oxygen molecule decomposition, and the active sites on the surface of the single-atom catalyst are used to promote ozone generation, thereby improving the ozone generation rate and ozone yield.

[0053] According to the embodiment of the present disclosure, the ultraviolet light source in the ultraviolet ozone generation module 204 is selected from any one of an ultraviolet light emitting diode (UVC LED) or an ultraviolet low-pressure mercury lamp (UVC low-pressure mercury lamp).

[0054] According to the embodiment of the present disclosure, the device further comprises a collection module 207, a cooling module 208, an ozone detection module 209, a safety system module 205 and a control module 206. It should be noted that the collection module 207, the cooling module 208, the ozone detection module 209, the safety system module 205 and the control module 206 can be flexibly arranged inside and outside the reaction chamber as needed, and are not limited to Figure 2 The installation position is shown. Figure 2 The installation schematic diagram shown is only for illustration and does not specifically limit the protection scope of the present disclosure.

[0055] According to the embodiment of the present disclosure, as Figure 2As shown, the collection module 207 is disposed inside the reaction chamber 201 and connected to the ultraviolet ozone generation module 204 for collecting the ozone gas generated by the ultraviolet ozone generation module 204. The cooling module 208 is disposed inside the reaction chamber 201 (not limited to the installation position provided in the present disclosure) for controlling the temperature inside the reaction chamber 201. By controlling the temperature of the reaction chamber 201 by using the cooling module 208, the temperature of the reaction chamber 201 is maintained at 20-25°C, for example, can be 20°C, 21°C, 22°C, 23°C, 24°C, 25°C, etc., to ensure stable generation of ozone gas. In addition, the ozone generation reaction occurs at a lower temperature, which helps to reduce energy consumption, reduce the risk related to high temperature operation, and at the same time reduce the environmental impact of ozone. The ozone detection module 209 is disposed inside the reaction chamber 201 for detecting the concentration of ozone gas generated by the ultraviolet ozone generation module 204. The ozone detection device can be selected from any one of an ozone sensor, a gas chromatograph, an ultraviolet light absorption method detector, and a laser absorption spectrometer, not limited to the installation position provided in the present disclosure.

[0056] According to the embodiments of the present disclosure, a safety system module 205 is disposed outside the reaction chamber 201 for detecting the ozone concentration outside the reaction chamber 201, wherein the safety system module 205 is selected from at least any two of a safety switch, an explosion-proof device, a gas leakage detector, a fire alarm, and an emergency shutdown assembly. By monitoring the ozone concentration outside the reaction chamber 201 by the safety system module 205, once ozone leakage is detected, the operation of the gas supply module 202 and the ultraviolet ozone generation module 204 is immediately stopped by the control module 206, thereby stopping the generation of ozone. A control module 206 is disposed outside the reaction chamber 201 and connected to the gas supply module 202 and the ultraviolet ozone generation module 204 for controlling the rate of oxygen-containing gas in the gas supply module 202 and the power and intensity of the ultraviolet ozone generation module 204. Further, the control module 206 includes a control panel, a sensor, a PLC, and a computer interface for parameter setting and remote control. It should be noted that the safety system module 205 and the control module 206 are not limited to the installation position provided in the present disclosure

[0057] According to the embodiments of the present disclosure, the rate of oxygen-containing gas delivery and / or the intensity of ultraviolet light irradiation is controlled to control the speed and concentration of ozone generation. For example, the rate of oxygen delivery in the gas supply module 202 is controlled by the control system module 206 to be in the range of 10 mL / min-50 mL / min, and / or the intensity of ultraviolet light irradiation in the ultraviolet ozone generation module 204 is controlled to be in the range of 30-50 mW / cm 2 .

[0058] The following embodiments illustrate the specific content of this disclosure. It should be noted that the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments in this disclosure, other embodiments obtained by those skilled in the art without creative effort are all within the scope of protection of this disclosure.

[0059] Example

[0060] by Figure 2 Taking an ozone generating device as an example, this disclosure provides a detailed description of an ozone generating method. Figure 2 This is a schematic diagram of an ozone generation device based on single-atom catalysis in one embodiment of the present disclosure.

[0061] like Figure 2 As shown, this disclosure proposes an ozone generating device, comprising: a reaction chamber 201, wherein a gas supply module 202 is provided in the reaction chamber, and the oxygen concentration provided by the gas supply module 202 is higher than 90%; a single-atom catalyst module 203, comprising an Al2O3 support and Pt metal catalyst material distributed on the support; and a UVC LED as the ultraviolet light source in the ultraviolet ozone generating module 204. Further, the gas supply module 202, the single-atom catalyst module 203, the ultraviolet ozone generating module 204, and the collection module 207 are connected in sequence. A cooling module 208 is disposed inside the reaction chamber to control the temperature of the reaction chamber 201 within 20-25°C; and an ozone sensor is used as an ozone monitoring module 209, which is disposed inside the reaction chamber 201 to monitor the ozone concentration within the reaction chamber 201.

[0062] A safety system module 205 is installed outside the reaction chamber 201 to monitor the ozone concentration outside the reaction chamber 201. The safety system module 205 includes a safety switch, explosion-proof equipment, a gas leak detector, a fire alarm system, and an emergency shutdown system. A control module 206 is also installed outside the reaction chamber 201. The control module 206 is connected to the gas supply module 202 and the ultraviolet ozone generation module 204 (the connection method is not limited to electrical connection). It is used to control the gas supply rate of the gas supply unit 202, the power supply and output power of the ultraviolet ozone generation module 204, and to set and remotely control relevant parameters. The control module 206 includes a control panel, sensors, a PLC, and a computer interface.

[0063] The method for generating ozone gas based on the above-mentioned single-atom catalyst ozone generation device includes the following steps S1 to S2:

[0064] Step S1: Prepare the oxygen source, i.e. provide oxygen through the gas supply module 202, and the oxygen is transported into the ozone generator module 204 through the oxygen channel and the single-atom catalyst module 203. The single-atom catalyst module 203 is arranged in the oxygen channel, and the carrier of the single-atom catalyst is alumina (Al203). Al203 has high surface area and chemical stability, which can ensure the uniform dispersion of metal single atoms and can fully react with oxygen. The shape of the Al203 carrier is conical, which is used to increase the contact area of the gas with the metal catalyst material. Oxygen can flow along the conical surface in the reaction to increase the contact reaction, which helps to uniformly distribute the oxygen and promotes the reaction. Pt single-atom metal is uniformly dispersed on the carrier by impregnation method with Pt metal catalyst material (1 wt%). This allows oxygen to fully contact the metal catalyst material uniformly dispersed on the surface of the single-atom catalyst to reduce the decomposition activation energy of oxygen molecules.

[0065] Step S2: Use UVC LED to irradiate the oxygen passing through the single-atom catalyst module 203 in step S1 to generate ozone in the ultraviolet ozone generation module 204 of the reaction chamber 201. The power of the UVC LED is 50 mW / cm 2 , which is used to provide ultraviolet light to excite oxygen molecules to separate and generate ozone in the ultraviolet ozone generation module 204 under the synergistic effect of active sites on the surface of the single-atom catalyst. During the generation of ozone gas, the reaction chamber 201 is cooled and temperature-controlled by the cooling module 208, so that the temperature in the reaction chamber 201 is maintained at 20-25℃, which ensures the stable generation of ozone gas. The concentration of ozone generated in the reaction chamber 201 is monitored by the ozone monitoring module 209. The rate of oxygen delivery in the gas supply module 202 is controlled at 10 mL / min by the control system module 206, the intensity of the UVC LED is controlled at 50 mW / cm 2 , and the ozone concentration outside the reaction chamber 201 is monitored by the safety system module 205, and the ozone threshold is set to 10%. When the ozone concentration reaches the set threshold, the gas supply module 202 is first closed by the control system module 206, and the UVC LED is closed after 5-10 min. The remaining oxygen reaction is stopped after the generation of ozone is stopped, so as to ensure that the reaction is fully completed; finally, the ozone gas generated in the ultraviolet ozone generation module 204 is collected by the collection module 207.

[0066] In summary, the present disclosure uses monatomic catalyst in the process of generating ozone, reduces the activation energy of oxygen decomposition, and accelerates the oxygen decomposition and ozone generation reactions under ultraviolet light irradiation by using the active sites on the surface of the monatomic catalyst, thereby improving the ozone generation rate and increasing the ozone yield. In addition, the monatomic catalyst can make the reaction occur at a lower temperature, which helps to reduce energy consumption, reduce the risks associated with high-temperature operation, reduce the impact on the environment, and ensure uniform distribution of active sites by uniformly dispersing the monatomic catalyst on the carrier, thereby achieving more uniform reactions and ozone generation effects, which helps to produce high-quality ozone products suitable for various applications such as water treatment and disinfection.

[0067] The specific embodiments described above further illustrate the purposes, technical solutions and beneficial effects of the present disclosure. It should be understood that the above description is only a specific embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A method for generating ozone based on a single-atom catalyst, characterized in that, The method includes: The oxygen-containing gas is brought into contact with the metal active sites on the surface of the single-atom catalyst and then transported into the ultraviolet ozone generation module in the reaction chamber. Ozone gas is generated within the ultraviolet ozone generating module when exposed to ultraviolet light.

2. The method according to claim 1, characterized in that, Also includes: The temperature of the reaction chamber is controlled to maintain it at 20-25°C. The generated ozone gas is collected using a collection module.

3. The method according to claim 2, characterized in that, When the ozone concentration in the collection module reaches a threshold, the delivery of the oxygen-containing gas is stopped, and ultraviolet irradiation is stopped after 5-10 minutes. The threshold is 10% of the target ozone concentration.

4. The method according to claim 1, characterized in that, The oxygen-containing gas has an oxygen concentration of over 90%.

5. The method according to claim 1, characterized in that, The single-atom catalyst is composed of a support and a metal catalytic material formed on the support. The metal catalytic material exists in the form of a single atom and is selected from Pt or Cu. The support is selected from any one of Al2O3, SiO2 or TiO2. The shape of the carrier is selected from a conical shape.

6. The method according to claim 5, characterized in that, The single-atom catalyst is formed by passing it through the following steps: The metal catalytic material is dispersed onto the support by an impregnation method.

7. The method according to claim 4, characterized in that, The rate and concentration of ozone generation can be controlled by controlling the rate at which the oxygen-containing gas is delivered and / or by controlling the intensity of the ultraviolet light irradiation.

8. An ozone generation device based on single-atom catalysis, used to perform the method according to any one of claims 1-7, characterized in that, The device includes: The reaction chamber contains a gas supply module, a single-atom catalyst module, and an ultraviolet ozone generation module. The gas supply module supplies oxygen-containing gas to the ultraviolet ozone generation module via the single-atom catalyst module. The single-atom catalyst module reduces the activation energy of oxygen molecule decomposition and provides active sites. The ultraviolet ozone generation module generates ozone.

9. The apparatus according to claim 8, characterized in that, Also includes: A collection module is located inside the reaction chamber and connected to the ultraviolet ozone generation module for collecting ozone gas generated by the ultraviolet ozone generation module. A cooling module, located inside the reaction chamber, is used to control the temperature inside the reaction chamber; An ozone detection module is installed inside the reaction chamber to detect the concentration of ozone gas generated by the ultraviolet ozone generation module. A safety system module, located outside the reaction chamber, is used to detect the ozone concentration outside the reaction chamber and maintain the safety of the ozone generating device; as well as The control module, connected to the gas supply module and the ultraviolet ozone generation module, is used to control the rate of oxygen-containing gas in the gas supply module and to control the power supply and intensity of the ultraviolet light source of the ultraviolet ozone generation module.

10. The apparatus according to claim 9, characterized in that, The ultraviolet light source in the ultraviolet ozone generation module is selected from either an ultraviolet light-emitting diode or an ultraviolet low-pressure mercury lamp; The safety system module is selected from at least two of the following: safety switches, explosion-proof equipment, gas leak detectors, fire alarms, and emergency shut-off components.

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