Adsorption type photoelectrocatalytic degradation treatment device
By combining activated carbon fiber rolls and electrodes, the problem of insufficient contact between waste gas and photocatalyst was solved. The Fe3+-TiO2/ACF composite material was used to suppress the recombination of photogenerated electrons and holes, thereby improving the waste gas purification efficiency and light energy utilization rate.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- TAIYUAN UNIVERSITY OF TECHNOLOGY
- Filing Date
- 2023-06-19
- Publication Date
- 2026-06-12
AI Technical Summary
In existing photocatalytic reaction devices, the waste gas does not come into sufficient contact with the photocatalyst, resulting in low purification efficiency. Furthermore, the TiO2 photocatalyst has a high recombination rate of photogenerated electron-hole pairs and low light energy utilization, making it unsuitable for large-scale use.
An activated carbon fiber roll combined with an electrode is used to form a Fe3+-TiO2/ACF composite material. A fixed bias voltage is applied to suppress the recombination of photogenerated electron-hole pairs. A multi-stage airflow distributor and a reflective layer are set in the device to ensure that the exhaust gas is in full contact with the photocatalyst and that the light is uniform.
It improves the contact efficiency between waste gas and photocatalyst, enhances the concentration of photocatalytically active free radicals, and significantly improves waste gas purification efficiency and light energy utilization.
Smart Images
Figure CN116651197B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the technical field of waste gas treatment, and in particular to an adsorption-type photoelectrocatalytic degradation treatment device. Background Technology
[0002] Volatile organic compounds (VOCs) are important precursors to common air pollutants PM2.5 and ozone (O3), with large emissions and complex compositions, making them extremely difficult to control. To fundamentally solve the pollution problems of PM2.5 and O3, the key is to start with the treatment of their key precursors, VOCs, primarily involving industrial waste gas treatment. Existing VOCs treatment technologies are mainly divided into several categories: physical adsorption, combustion, absorption, and chemical scrubbing. All of these methods are used in production, but due to high investment and operating costs or low efficiency, there is room for improvement. Due to the complexity of VOCs composition, photocatalysis technology, which has good degradation effects and non-selective reactions to VOCs, has become a new research hotspot in the field of air purification; however, breakthroughs are still needed in the internal design and development of photocatalytic reaction devices.
[0003] TiO2 photocatalysts have not yet met the practical needs of industrial application because their high recombination rate of photogenerated electron-hole pairs results in low photocatalytic activity and low light energy utilization. These drawbacks prevent their large-scale use. To improve the degradation efficiency of photocatalytic reaction systems, the combined application of photocatalysis with other treatment technologies is widely adopted. The combined application of photocatalysis and adsorption technologies can significantly improve treatment efficiency. For the adsorption-photocatalytic degradation of VOCs, there is no regeneration and activation process; the regeneration process occurs concurrently with the adsorption process. The regeneration process involves the mineralization and desorption of VOCs adsorbed on the ACF surface by the catalyst during photocatalysis.
[0004] Most photocatalytic reaction devices currently on the market increase the flow time of waste gas within the device and the mixing time between the waste gas and the photocatalyst by changing the shape, area, or volume of the flow channel, thereby increasing the waste gas purification rate. However, they still suffer from the drawback of insufficient contact between the waste gas and the photocatalyst during flow, resulting in low purification efficiency for a certain period of time. Therefore, there is an urgent need for a device that can improve waste gas purification efficiency. Summary of the Invention
[0005] The purpose of this invention is to provide an adsorption-type photocatalytic degradation treatment device to solve the problems existing in the prior art, so as to enable the waste gas to fully contact the photocatalyst and improve the purification efficiency.
[0006] To achieve the above objectives, the present invention provides the following solution:
[0007] This invention provides an adsorption-type photoelectrocatalytic degradation treatment device, including a reaction chamber. One end of the reaction chamber is provided with an air inlet and the other end with an air outlet. At least one airflow distributor is provided inside the reaction chamber. At least one activated carbon fiber roll is provided on the end face of the airflow distributor. One end of the roll is an open air inlet and the other end is closed. Light sources are provided inside both the airflow distributor and the roll. Photocatalyst is attached to the roll. Electrodes are provided on the roll and can be applied with a fixed bias voltage.
[0008] Preferably, the roll includes an unmodified nitric acid layer and a nitric acid-modified layer, the unmodified nitric acid layer and the nitric acid-modified layer are connected by sewing, and the activated carbon fibers on the nitric acid-modified layer are modified with nitric acid.
[0009] Preferably, the unmodified nitric acid layer and the modified nitric acid layer are sewn together by two metal electrodes, which are respectively connected to the positive and negative poles of the electric field. The metal electrodes are comb-shaped and are arranged at equal intervals along the circumference of the roll.
[0010] Preferably, the conductive material of the metal electrode includes aluminum, silver, copper, platinum, and tungsten.
[0011] Preferably, the photocatalyst is a TiO2 catalyst; the modification scheme of the TiO2 catalyst includes adding Fe, Mn, Zn, Cu, and CO. 2+ C, graphene, vanadium nitrogen, Fe, N, S, Al 3+ And SiO2.
[0012] Preferably, a filter screen is provided on the air inlet, and a power cable is provided on the reaction chamber.
[0013] Preferably, the airflow distributor includes a partition, the light source, and the roller. The partition is sealed and connected to the inner cavity of the reaction chamber, and an airflow cavity is formed between the partition and an adjacent partition or the reaction chamber. The roller is located in the airflow cavity. A plurality of through holes are evenly distributed on the partition. The inlet end of the roller is connected to the through holes. The light source is evenly distributed inside and outside the roller. The bottom plate of the roller is made of an airtight material.
[0014] Preferably, the light source is a linear light source, the length of the roll is less than the length of the airflow cavity, one end of the linear light source is fixed to the center of the through hole by a bracket, or one end of the linear light source is fixed to the partition plate, and the linear light sources are evenly distributed around the roll.
[0015] Preferably, the linear light source inside the roll is provided with a plurality of evenly arranged guide plates, the guide plates forming an angle of 45°-90° with the axis of the linear light source, and the guide plates are made of transparent material.
[0016] Preferably, a reflective layer is provided on the inner wall of the airflow cavity, the reflective layer comprising a silver metal plating layer, an aluminum metal plating layer, and acrylic resin reflective paint.
[0017] The present invention achieves the following technical effects compared to the prior art:
[0018] This invention increases the residence time of waste gas in the reaction device by setting up an activated carbon fiber roll. The adsorption effect of the activated carbon fiber allows the waste gas to come into more thorough contact with the photocatalyst. The electric field coupled to the surface of the activated carbon fiber roll can strongly suppress the recombination of photogenerated electron-hole pairs, increase the concentration of active free groups on the catalyst surface, and increase catalytic efficiency. Attached Figure Description
[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0020] Figure 1 This is a three-dimensional structural schematic diagram of an adsorption-type photoelectrocatalytic degradation treatment device in an embodiment of the present invention;
[0021] Figure 2 This is a top view schematic diagram of another adsorption-type photoelectrocatalytic degradation treatment device in an embodiment of the present invention;
[0022] Figure 3 This is a schematic diagram of the structure of a single-stage airflow distributor in an embodiment of the present invention;
[0023] Figure 4 This is a schematic diagram of the composition of the roll after it is unfolded in an embodiment of the present invention;
[0024] Figure 5 This is a schematic diagram of the structural layout of the guide plate in an embodiment of the present invention;
[0025] Figure 6 This is a schematic diagram of the positional distribution of the roll and the linear light source in an embodiment of the present invention (a) to (l);
[0026] Wherein: 1-Reaction chamber, 2-Air inlet, 3-Filter screen, 4-Air outlet, 5-Roller, 6-Baffle, 7-Linear light source, 8-Metal electrode, 9-Base plate, 10-Reflective layer, 11-Airflow cavity, 12-Cable, 13-Guide plate, 100-Adsorption type photoelectrocatalytic degradation treatment device. Detailed Implementation
[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0028] The purpose of this invention is to provide an adsorption-type photocatalytic degradation treatment device to solve the problems existing in the prior art, so as to enable the waste gas to fully contact the photocatalyst and improve the purification efficiency.
[0029] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0030] Example 1
[0031] like Figures 1 to 6 As shown: This embodiment provides an adsorption-type photoelectrocatalytic degradation treatment device 100, including a reaction chamber 1. One end of the reaction chamber 1 is provided with an air inlet 2 and the other end is provided with an air outlet 4. At least one airflow distributor is provided inside the reaction chamber 1. At least one activated carbon fiber roll 5 is provided on the end face of the airflow distributor. One end of the roll 5 is an open air inlet and the other end is closed. Light sources are provided inside both the airflow distributor and the roll 5. Photocatalyst is attached to the roll 5. Electrodes are provided on the roll 5 and a fixed bias voltage can be applied.
[0032] In a preferred embodiment, the material of the roll 5 in this embodiment is a TiO2 / ACF composite material, comprising an unmodified layer and a nitric acid-modified layer, which are connected by sewing. The activated carbon fibers on the nitric acid-modified layer are modified with nitric acid. In this embodiment, the wall of the roll 5 is a double-layer activated carbon fiber material, one layer being unmodified activated carbon fiber (inner or outer layer), and the other layer being nitric acid-modified activated carbon fiber (outer or inner layer). Through modification, the non-polar functional groups on the surface of the activated carbon fiber are oxidized to polar functional groups, increasing the adsorption performance for polar molecules, while the unmodified activated carbon fiber has a high adsorption capacity for non-polar molecules. By superimposing and coupling polar adsorption materials and non-polar adsorption materials, the wall of the roll 5 has strong adsorption performance for both polar and non-polar molecules, increasing the residence time of VOCs and improving the catalytic degradation effect and uniformity. The unmodified nitric acid layer and the nitric acid-modified layer are sewn together by two metal electrodes 8, which are respectively connected to the positive and negative electrodes of the electric field. The metal electrodes 8 are comb-shaped and staggered at equal intervals along the circumference of the roll 5. In this embodiment, the photocatalyst is a TiO2 catalyst. In this embodiment, aluminum wire is used as the conductive material on the surface of the ACF on the wall of the double-layer roll 5. The aluminum wire is bent into tooth-shaped electrodes, and a fixed bias voltage is applied at both ends of the electrodes using a potentiostat to strongly suppress the recombination of photogenerated electron-hole pairs, while also serving as a support and conductor for the activated carbon fiber material. The conductive materials of the metal electrodes 8 also include aluminum, silver, copper, platinum, and tungsten. As can be seen from the magnified view, the metal wire is interwoven on the surface of the activated carbon fiber, also serving as a support and conductor for the activated carbon fiber material. In this embodiment, the aluminum wire is made into a tooth shape and coupled to the unmodified nitric acid layer and the nitric acid-modified layer. The two ends of the toothed electrode are connected to a power source. The number and spacing of the teeth are fixed, and the magnitude of the uniform electric field intensity applied to the surface of each activated carbon fiber layer is changed by adjusting the power supply voltage. In this embodiment, aluminum wire is used as the conductive material on the ACF surface. The main function of the metal electrode 8 is to provide a uniform electric field. After applying voltage, a uniform electric field of a certain intensity will be generated on the surface of the activated carbon fiber. That is, it is only necessary to ensure that the electric field intensity at this point is slightly higher than the field strength required to suppress the recombination between photogenerated electrons and holes, but not too much higher. The number and spacing of the comb teeth folded out by the electrode need to take into account the magnitude of the uniform electric field intensity. Existing research shows that the applied field intensity range should be from 0.3V / cm (in surface contact with the catalyst) to 75V / cm (not in contact with the catalyst surface, similar to placing the catalyst between capacitors). In this embodiment, the metal wire is in contact with the catalyst surface. The actual optimal value needs to be determined by experiments. The electric field intensity is the result of the combined effect of the number and spacing of the metal wires and the magnitude of the applied voltage.
[0033] As a preferred embodiment, the air inlet 2 is equipped with a filter screen 3, which can initially filter some large molecular particles and dust. The reaction chamber 1 is equipped with a power supply cable 12 for connecting the light source and electrodes. All cables can be concentrated in a cable tray to keep the appearance neat.
[0034] In a preferred embodiment, the airflow distributor in this embodiment includes a partition 6, a light source, and a roller 5. The partition 6 is sealed within the inner cavity of the reaction chamber 1, forming an airflow cavity 11 between the partition 6 and adjacent partitions 6 or the reaction chamber 1. The roller 5 is located within the airflow cavity 11. Several through holes are evenly distributed on the partition 6, and the inlet end of the roller 5 is connected to one of the through holes. The light source is evenly distributed inside and outside the roller 5. The bottom plate 9 of the roller 5 is made of an airtight material and can fix the other end of the linear light source 7. The reaction device in this embodiment can also be composed of multiple single-stage airflow distributors. The number of airflow distributors can be set differently depending on the effect of waste gas degradation, and the number of rollers 5 can also be set according to the space size and the effect of waste gas degradation. In this embodiment, the single-stage airflow distributor has four rollers 5.
[0035] In a preferred embodiment, the light source is a linear light source 7. The length of the drum 5 is less than the length of the airflow cavity 11. One end of the linear light source 7 is fixed to the center of the through hole by a bracket, or one end of the linear light source 7 is fixed to the partition plate 6. The linear light sources 7 are evenly distributed around the drum 5. In this embodiment, the drum 5 is cylindrical, and the internal linear light source 7 is also cylindrical. In this way, Fe 3+ - The inner wall surface of the TiO2 / ACF composite material roll 5 can better receive light, ensuring the uniformity of the photogenerated carrier concentration on the inner wall surface.
[0036] The device in this embodiment is equivalent to dividing the reaction chamber 1 into several airflow distributors through several partitions 6, realizing the staged treatment of airflow degradation. Each roller 5 has an air inlet 2 at one end. The number and size of the rollers 5 determine the size of the total air inlet, and the arrangement of the rollers 5 also determines the uniformity of the airflow organization to a certain extent. Studies have shown that the size of the device is not directly proportional to the degradation effect. Therefore, multiple rollers 5 are used to ensure degradation efficiency. In this embodiment, in order to ensure the uniformity of illumination, software simulation was performed based on the size of the device, and a roller 5 distribution with a relatively small number of lamps was adopted to ensure uniform illumination.
[0037] In a preferred embodiment, the linear light source 7 inside the roll 5 is provided with several uniformly arranged guide plates 13. The guide plates 13 form an angle of 45°-90° with the axis of the linear light source 7. The guide plates 13 are made of transparent material, preferably glass in this embodiment, which has minimal light reduction. The shapes of the guide plates 13 include rectangular, rectangular spiral twist, fan-shaped, and fan-shaped spiral twist. As an airflow disturbance structure, the guide plates 13 can promote the uniform diffusion of airflow on the wall of the roll 5. The uniformity of diffusion ensures the uniformity of the amount of gas passing through each position on the wall. This method ensures that the amount of gas passing through each position on the wall is as similar as possible, reducing the probability of reduced catalytic degradation efficiency due to excessive or insufficient gas volume.
[0038] As a preferred embodiment, a reflective layer 10 (mirror-reflective material) is provided on the inner wall of the airflow cavity 11 in this embodiment. The reflective layer 10 includes a silver metal plating layer, an aluminum metal plating layer and an acrylic resin reflective paint, which can maximize the reflection of the linear light source 7 in the airflow cavity 11 to the outer wall surface of the roll 5, thereby improving the utilization rate of the light source.
[0039] In this embodiment, the specific flow pattern of the waste gas is as follows: VOCs waste gas inlet 2 and outlet 4 are respectively provided at both ends of the adsorption-photocatalytic reactor. The waste gas first passes through the filter screen 3 and then enters the front cavity of the reactor. It then enters the drum 5 of the primary airflow distributor through the through-hole of the partition plate 6. After being turbulent by the guide plate 13 inside the drum 5, the waste gas diffuses to the airflow cavity 11 outside the drum 5. During diffusion on the wall surface, the waste gas mainly passes through two layers of Fe... 3+ The TiO2 / ACF composite material allows VOCs waste gas to pass through an unmodified activated carbon fiber layer, achieving high adsorption performance for non-polar VOCs molecules; and through a nitric acid-modified activated carbon fiber layer, it achieves high adsorption performance for polar VOCs molecules. Subsequently, the waste gas in the airflow chamber 11 enters the airflow chamber 11 of the secondary distributor via the roller 5 on the baffle 6. The waste gas can repeat the above diffusion degradation process, finally reaching the waste gas outlet 4, completing the catalytic degradation process. The waste gas must meet emission standards before being discharged. For example, the concentration of non-methane total hydrocarbons at the outlet of the petrochemical industry must meet industry standards. Specific detection methods can be achieved using existing detection equipment, such as PID photoionization detectors, FID, etc.
[0040] The adsorption-photocatalytic degradation device in this embodiment consists of a multi-stage airflow distributor. Each airflow distributor allows the waste gas to pass evenly through a hollow cylinder surrounded by activated carbon fibers. The waste gas diffuses on the wall of the cylinder 5 into the distributor cavity, and then enters the next stage distributor for further catalytic treatment. A linear light source 7 is installed inside each hollow cylinder to ensure uniform illumination inside the cylinder 5, and the evenly distributed light sources in the distributor cavity ensure uniform illumination on the outer wall of the cylinder 5. This embodiment utilizes the adsorption effect of activated carbon fibers to ensure more thorough contact between the waste gas and the photocatalyst. By combining electrochemical methods, the recombination of photogenerated electrons and holes is strongly suppressed, increasing the number of active free radicals on the catalyst surface and improving the adsorption-photocatalytic degradation efficiency of the waste gas.
[0041] Example 2
[0042] The difference between this embodiment and Embodiment 1 lies in the shape and degree of protrusion of the guide vanes 13 inside the drum 5. Here, only some of the arrangement of the guide vanes 13 are shown:
[0043] Table 1. Arrangement of the deflectors
[0044] Shape of the internal deflector of the drum Installation angle of the internal deflector of the drum Rectangle At 90° to the lamp tube Rectangle At 60° to the lamp tube Rectangle At 45° to the lamp tube Rectangular spiral twist At 90° to the lamp tube Rectangular spiral twist At 60° to the lamp tube Rectangular spiral twist At 45° to the lamp tube Fan-shaped At 90° to the lamp tube Fan-shaped At 60° to the lamp tube Fan-shaped At 45° to the lamp tube Fan-shaped spiral twist At 90° to the lamp tube Fan-shaped spiral twist At 60° to the lamp tube Fan-shaped spiral twist At 45° to the lamp tube
[0045] This embodiment does not limit the shape of the protrusion of the guide plate 13 or the way it surrounds the lamp tube. The shape and degree of protrusion of the guide plate 13 can also be in various irregular and different shapes combined to ensure the uniformity of the amount of gas passing through each position on the wall. In this way, it is possible to ensure that the amount of gas passing through each position on the wall is the same as much as possible, thereby reducing the probability of reduced catalytic degradation efficiency caused by excessive or insufficient gas volume.
[0046] Example 3
[0047] The difference between this embodiment and Embodiment 1 lies in the different modification scheme of the TiO2 photocatalyst: the modification scheme of the TiO2 catalyst includes adding substances or elements such as Fe, Mn, Zn, Cu, CO2+, C, graphene, vanadium nitrogen, Fe, N, S, Al3+ and SiO2, which can be added to participate in the formation process of titanium dioxide crystallization during the formation of titanium dioxide.
[0048] Table 2 Catalyst Modification Schemes
[0049]
[0050] This embodiment uses the hydrothermal synthesis method to modify metallic Fe as an example. The specific method involves: using tetrabutyl titanate as a precursor, ferric nitrate, tetrabutyl titanate, ethanol, and deionized water are reacted. Tetrabutyl titanate is directly hydrolyzed on the inner fiber rods of activated carbon fibers to obtain titanium dioxide. Ferric nitrate, as a reactant, is placed in a hydrothermal synthesis reactor along with the activated carbon fibers. Trivalent Fe ions directly enter the internal crystals of titanium dioxide to participate in the crystallization synthesis. The hydrothermal synthesis reactor is then placed in an oven and reacted at a constant temperature of 80–120°C for 24 hours. Then, the Fe... 3+ - The TiO2 / ACF composite material is ultrasonically cleaned to remove surface impurities.
[0051] Example 4
[0052] The difference between this embodiment and Embodiment 1 lies in the number of internal drums 5, the position and power of the linear light source 7, and so on. Figure 6 As shown, the distribution positions of the roll 5 and the linear light source 7 include X-shaped - surrounding shape, center - square shape, diagonal - X-shaped, both sides - X-shaped, triangular - X-shaped, triangular - Y-shaped, plum blossom - X-shaped, square - X-shaped, square - nine-square grid shape, cross - square shape, trapezoid - inverted trapezoid, and trapezoid - nine-square grid shape, as detailed below:
[0053] Table 3. Position distribution of the roll and linear light source
[0054] Number of drums Position of the drums Number of linear light sources Position of the linear light sources 1 Center 4 Square-shaped 2 Diagonal 5 X-shaped 2 Both sides 5 X-shaped 3 Triangle formation 5 X-shaped 3 Triangle formation 4 Y-shaped 4 Plum blossom-shaped 5 X-shaped 4 Square-shaped 5 X-shaped 4 Square-shaped 9 Nine-square grid-shaped 5 Cross-shaped 4 Square-shaped 5 Trapezoidal 6 Inverted trapezoidal 5 Trapezoidal 9 Nine-square grid-shaped
[0055] In this embodiment, the reasonable arrangement of light sources ensures the uniformity of illumination on the outer wall surface of the roll 5.
[0056] This specification uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.
Claims
1. An adsorption-type photoelectrocatalytic degradation treatment device, characterized in that: The device includes a reaction chamber, with an air inlet at one end and an air outlet at the other end. At least one airflow distributor is installed inside the reaction chamber. At least one roll of activated carbon fiber is installed on the end face of the airflow distributor. One end of the roll is an open air inlet and the other end is closed. Light sources are installed inside both the airflow distributor and the roll. Photocatalyst is attached to the roll. Electrodes are installed on the roll and can be used to apply a fixed bias voltage. The roll includes an unmodified nitric acid layer and a nitric acid-modified layer, which are connected by sewing. The activated carbon fibers on the nitric acid-modified layer are modified with nitric acid. The airflow distributor includes a partition, the light source, and the roll. The partition is sealed in the inner cavity of the reaction chamber, and an airflow cavity is formed between the partition and an adjacent partition or the reaction chamber. The roll is located in the airflow cavity. The partition has several through holes evenly distributed on it, and the inlet end of the roll is connected to the through holes. The light source is evenly distributed inside and outside the roll. The unmodified nitric acid layer and the modified nitric acid layer are sewn together by two metal electrodes, which are respectively connected to the positive and negative poles of the electric field. The metal electrodes are comb-shaped and are arranged at equal intervals along the circumference of the roll. The light source is a linear light source, the length of the roll is less than the length of the airflow cavity, one end of the linear light source is fixed to the center of the through hole by a bracket, or one end of the linear light source is fixed to the partition plate, and the linear light sources are evenly distributed around the roll. The linear light source inside the roll is provided with several evenly arranged guide plates. The guide plates are at an angle of 45°-90° to the axis of the linear light source. The guide plates are made of transparent material. A reflective layer is provided on the inner wall of the airflow cavity, the reflective layer comprising a silver metal plating layer, an aluminum metal plating layer, and acrylic resin reflective paint.
2. The adsorption-type photoelectrocatalytic degradation treatment device according to claim 1, characterized in that: The conductive materials of the metal electrodes include aluminum, silver, copper, platinum, and tungsten.
3. The adsorption-type photoelectrocatalytic degradation device according to claim 1, characterized in that: The photocatalyst is a modified TiO2 catalyst; the modification scheme of the modified TiO2 catalyst includes adding Fe, Mn, Zn, Cu, and Co to the TiO2 catalyst. 2+ C, graphene, vanadium nitrogen, N, S, Al 3+ And SiO2.
4. The adsorption-type photoelectrocatalytic degradation device according to claim 1, characterized in that: A filter screen is installed on the air inlet, and a power cable is installed on the reaction chamber.
5. The adsorption-type photoelectrocatalytic degradation device according to claim 1, characterized in that: The bottom plate of the roll is made of an airtight material.