Bionic photocatalytic reactor

Abstract

The invention discloses a bionic photocatalytic reactor which comprises a circulating pump, a bionic photocatalytic reactor body and a liquid storage and gas collection bottle. The circulating pump is connected with the bionic photocatalytic reactor, the bionic photocatalytic reactor is connected with the liquid storage and gas collection bottle, and the liquid storage and gas collection bottle is connected with the circulating pump; the bionic photocatalytic reactor is formed by stacking, series connection, parallel connection or series-parallel connection of a plurality of reaction units. The bionic photocatalytic reactor is designed and developed by simulating a plant chloroplast capsule-like structure, and a plurality of reaction units are stacked by using a number increase method, so that larger-area application of photocatalytic water decomposition and enhancement of system mass transfer are realized; the sunlight utilization efficiency is greatly improved through multi-layer stacking of the flat plates loaded with the Z-type heterojunction photocatalyst capable of efficiently decomposing water; meanwhile, the outdoor operation of a reaction system formed by connecting a plurality of bionic photocatalytic reactors in series / in parallel clearly shows the feasibility of large-scale application of the multilayer stacked photocatalytic reactors.

Description

Technical Field

[0001] The invention belongs to the technical field of photocatalysis, and in particular relates to a bionic photocatalytic reactor. Background Art

[0002] At present, traditional fossil energy is constantly being consumed and carbon emissions are continuously growing. Faced with a series of energy and environmental problems worldwide, it is urgent to develop new clean alternative energy sources. Hydrogen has the advantages of high calorific value and no pollution. It can be used in many fields such as energy, transportation, chemical industry, agriculture, etc., and is expected to be one of the energy carriers for sustainable development in the future. However, traditional hydrogen production technology still faces problems such as complex preparation process, environmental pollution, and high carbon emissions. Solar photocatalytic water decomposition achieved by imitating the natural photosynthesis of plants is considered to be a potential technology for large-scale production of renewable hydrogen energy. This technology can use the electron-hole pairs generated by sunlight irradiating semiconductor photocatalysts to drive the redox reaction to decompose water to produce hydrogen. It has the advantages of simple process, environmental friendliness, and easy scalability. It has received widespread attention in the energy field and has shown initial application potential.

[0003] However, existing photocatalytic reaction systems are often limited to the research of powder dispersion systems in the laboratory. Although some high-performance photocatalysts perform well in experimental tests, due to the lack of photocatalytic water splitting reactors that can effectively utilize sunlight and enhance energy and material transfer, the efficiency of the overall water splitting reaction is still far from industrialization. Summary of the invention

[0004] In order to overcome the problem of the efficiency of water decomposition reaction in the prior art, the purpose of the present invention is to provide a bionic photocatalytic reactor, which can improve the efficiency of water decomposition reaction.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is as follows: A bionic photocatalytic reactor comprises a circulation pump, a bionic photocatalytic reactor and a liquid storage and gas collection bottle; the circulation pump is connected to the bionic photocatalytic reactor, the bionic photocatalytic reactor is connected to the liquid storage and gas collection bottle, and the liquid storage and gas collection bottle is connected to the circulation pump; The bionic photocatalytic reactor is formed by connecting a plurality of reaction units in a stacking, series, parallel or series-parallel manner.

[0006] Furthermore, it also includes a circulating pump supporting battery connected to the circulating pump.

[0007] Furthermore, the bionic photocatalytic reactor includes a front cover plate, multiple reaction units, a rear cover plate and a sealing gasket; wherein the front cover plate is arranged on one side of the reaction unit, and the rear cover plate is arranged on the other side, and sealing gaskets are arranged between the multiple reaction units and the front cover plate and between the reaction units and the rear cover plate.

[0008] Furthermore, the reaction unit includes a plurality of liquid chamber cavities stacked together and connected, a photocatalyst plate is arranged between adjacent liquid chamber cavities, and a quartz light window is arranged between the liquid chamber cavities and the front cover plate.

[0009] Furthermore, each liquid chamber cavity is provided with an interface, and a plug is provided at the interface.

[0010] Furthermore, the plug includes an upper interface plug, a lower interface plug, a left interface plug and a right interface plug. The liquid chamber cavity, the front cover plate, the rear cover plate, the upper interface plug, the right interface plug, the lower interface plug and the left interface plug are all made of polyetheretherketone, polytetrafluoroethylene or resin materials; the liquid chamber cavity is square, round or rectangular.

[0011] Furthermore, one side of the photocatalyst plate is a square quartz glass sheet loaded with a photocatalyst, and the photocatalyst is one or more of metal hydroxides, metal particles, metal oxides, perovskites, organic semiconductors and non-metallic composite photocatalysts.

[0012] Furthermore, the photocatalyst loading method includes one or more of screen printing, ultrasonic spraying, spin coating, casting, transfer printing and in-situ growth method.

[0013] Furthermore, a light source is arranged on one side of the bionic photocatalytic reactor, and the light source is sunlight, a xenon lamp, an LED lamp or a mercury lamp, and the illumination direction of the light source is facing the quartz light window of the bionic photocatalytic reactor.

[0014] Furthermore, the bionic photocatalytic reactor is used for one or more photocatalytic reactions such as photocatalytic decomposition of water to produce hydrogen, photocatalytic decomposition of water to produce oxygen, photocatalytic nitro reduction reaction, photocatalytic alcohol oxidation reaction, photocatalytic benzimidazole group synthesis reaction, photocatalytic synthesis of brominated drugs and photocatalytic [2+2] cycloaddition reaction.

[0015] Compared with the existing technology, the present invention has the following beneficial effects: The present invention provides a design method and application of a bionic photocatalytic reactor. The bionic photocatalytic reactor is designed and developed by imitating the thylakoid structure in plant chloroplasts. Compared with the traditional single-layer photocatalytic reaction device, the present invention takes into account the problem of insufficient utilization of light energy by the catalyst, and realizes full utilization of sunlight by the photocatalyst by longitudinal stacking, series connection, parallel connection or series-parallel connection of the reaction units. The bionic catalytic reactor provided by the present invention can effectively play the bionic design idea when applied to the photocatalytic decomposition of water to produce hydrogen. The multi-layer reaction unit realizes the layer-by-layer absorption and utilization of sunlight. The generated hydrogen and oxygen gas is taken out of the reaction unit to the liquid storage gas collection bottle through the flow of water, which significantly enhances the energy and material transfer of the reaction system during the photocatalytic decomposition of water to produce hydrogen, overcomes the mass transfer difficulties and low efficiency of sunlight utilization in the traditional system, and significantly improves the conversion efficiency of solar energy to hydrogen energy; the bionic photocatalytic reactor provided by the present invention utilizes multiple bionic photocatalytic reactors to form an amplified photocatalytic module by multi-layer splicing and parallel connection, and the multiple amplified photocatalytic modules are further connected. Its multi-day outdoor operation clearly demonstrates the feasibility of large-scale application of multi-layer stacked photocatalytic reactors.

[0016] Furthermore, in order to solve the problem of reduced photocatalytic reaction efficiency after amplification of the photocatalytic reaction device and realize rapid splicing and expansion of reaction units, the present invention designs and constructs interface plugs to realize rapid planar expansion and splicing of high-efficiency reaction units, thereby achieving digital coupling of high-efficiency photocatalytic units.

[0017] Furthermore, the photocatalyst plate is loaded with a highly efficient water splitting Z-type heterojunction photocatalyst, and the number multiplication method is used to fully utilize sunlight over a larger area, thereby solving the problem of low sunlight utilization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creativity and labor.

[0019] Figure 1 A schematic diagram of a bionic photocatalytic reactor provided by the present invention; wherein (A) is a schematic diagram, and (B) is a photo of the overall system; Figure 2 It is a schematic diagram of the structure of a bionic photocatalytic reactor based on the thylakoid structure in plant chloroplasts; Figure 3Schematic diagram of a reaction unit of a biomimetic photocatalytic reactor, wherein (A) is a disassembled diagram of the reaction unit, (B) is a cross-sectional diagram of a single module, and (C) is a vertical view of the reaction unit; Figure 4 Schematic diagram of an enlarged photocatalytic module with 9 biomimetic photocatalytic reactors connected in a 3×3 pattern. (A) is a vertical view and (B) is a side view. Figure 5 To amplify the solar-to-hydrogen efficiency of the photocatalytic module, outdoor experiments were conducted on photocatalytic water splitting from 9:00 to 17:00 every day from June 8 to 10, 2023; Figure 6 Photo of nine enlarged photocatalytic modules connected for outdoor photocatalytic water splitting experiments.

[0020] Description of reference numerals: 1. Circulation pump, 2. Circulation pump supporting battery, 3. Bionic photocatalytic reactor, 4. Liquid storage and gas collecting bottle, 5. Fastening screws, 6. Quartz light window, 7. Photocatalyst plate, 8. Fastening nuts, 9. Front cover, 10. Reaction unit and internal liquid chamber cavity, 11. Rear cover, 12. Upper interface plug, 13. Right interface plug, 14. Lower interface plug, 15. Left interface plug. DETAILED DESCRIPTION

[0021] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly and comprehensively understood.

[0022] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0023] In order to improve the efficiency of water decomposition reaction, the present invention provides a highly integrated bionic photocatalytic reactor to enhance the energy and material transfer during the reaction process.

[0024] See also Figure 1-Figure 6A bionic photocatalytic reactor of the present invention comprises a circulation pump 1, a circulating pump supporting battery 2, a pipeline, a bionic photocatalytic reactor 3 and a liquid storage and gas collection bottle 4; the circulating pump supporting battery 2 is connected to the circulation pump 1 to supply power to the circulation pump 1. The circulation pump 1 is connected to the bionic photocatalytic reactor 3, the bionic photocatalytic reactor 3 is connected to the liquid storage and gas collection bottle 4, and the liquid storage and gas collection bottle 4 is connected to the circulation pump 1.

[0025] See also Figure 2 The bionic photocatalytic reactor 3 is designed based on the thylakoid structure in plant chloroplasts. By utilizing the structure of thylakoids, granules and thylakoid bridges, the bionic photocatalytic reactor 3 can efficiently utilize sunlight by stacking, connecting in series, in parallel or in series and in parallel with several reaction units, and realize multi-layer high-efficiency photocatalytic water splitting reaction. Through the mode of connecting in series, in parallel or in series and in parallel with the reaction units, an amplified photocatalytic module is formed, and the efficiency loss problem in the amplification process of the photocatalytic reactor is solved.

[0026] The biomimetic photocatalytic reactor 3 is used to place the photocatalyst and serve as a place for the photocatalytic reaction to occur. Figure 3 In (A), (B) and (C), the bionic photocatalytic reactor 3 includes a front cover plate 9, a plurality of reaction units 10, a rear cover plate 11 and a sealing gasket; wherein the front cover plate 9 is arranged on one side of the reaction unit 10, and the rear cover plate 11 is arranged on the other side, and sealing gaskets are arranged between the reaction unit 10 and the front cover plate 9 and between the reaction unit 10 and the rear cover plate 11.

[0027] See also Figure 3 In (A), (B) and (C), the reaction unit 10 includes 1-8 liquid chamber cavities, each of which is provided with an upper interface plug 12, a lower interface plug 14, a left interface plug 15 and a right interface plug 13; wherein the liquid chamber cavity, the front cover plate 9, the rear cover plate 11, the upper interface plug 12, the right interface plug 13, the lower interface plug 14 and the left interface plug 15 are all made of polyetheretherketone, polytetrafluoroethylene or resin material; the liquid chamber cavity includes square, circular or rectangular shapes, and preferably, the liquid chamber cavity is square.

[0028] Preferably, four liquid chamber cavities are stacked together.

[0029] See also Figure 3, when there are four liquid chamber cavities, they are the first liquid chamber, the second liquid chamber, the third liquid chamber and the fourth liquid chamber, respectively. A photocatalyst plate 7 is arranged between two adjacent liquid chamber cavities, and a photocatalyst plate 7 is arranged between the fourth liquid chamber and the rear cover 11. A quartz light window 6 is arranged between the first liquid cavity and the front cover 9. Both sides of each liquid chamber cavity are sealed by a sealing gasket. Specifically, a sealing gasket is arranged between the front cover 9 and the first liquid chamber cavity and between the rear cover 11 and the fourth liquid chamber cavity. The front cover 9, the first liquid chamber, the second liquid chamber, the third liquid chamber, the fourth liquid chamber and the rear cover 11 are connected by a fastening screw 5 and a fastening nut 8. A sealing gasket is arranged between the first liquid chamber and the second liquid chamber, between the second liquid chamber and the third liquid chamber, and between the third liquid chamber and the fourth liquid chamber.

[0030] The photocatalyst plate is arranged to allow the catalyst to directly contact the water in the liquid chamber cavity, and a photocatalytic reaction occurs under the irradiation of sunlight. The sealing gaskets and fastening screws between each layer of reaction units ensure the air tightness and water tightness of the reactor.

[0031] Specifically, a number of through holes are evenly opened around the liquid chamber cavity and the sealing gasket; the fastening screws 5 pass through the through holes on the front cover plate 9, the four liquid chamber cavities, the sealing gasket, and the rear cover plate 11 in sequence, and are connected to the fastening nuts 8 behind the rear cover plate 11, thereby realizing the sealed assembly of the various components of the entire bionic photocatalytic reactor 3.

[0032] Preferably, each liquid chamber cavity is provided with a threaded through hole around it, that is, a threaded through hole is provided on the top surface, the bottom surface, and the center of two symmetrically arranged side surfaces, a nut is provided in each threaded through hole, the nut points to the center of the liquid chamber cavity, the upper and lower left and right interfaces are hollow cylinders with threads, which are tightened around the liquid chamber cavity by a hexagonal wrench, and a plastic hard tube is inserted inside to realize the circulation of the reaction liquid. The upper and lower left and right interface plugs (upper interface plug 12, lower interface plug 14, left interface plug 15 and right interface plug 13) with the same threads are correspondingly tightened between adjacent liquid chamber cavities, and each interface plug is a hollow cylinder with a plastic hard tube inserted inside, which is used to seal the connection pipeline and each adjacent liquid chamber cavity, and at the same time serves as the lower inlet, side inlet, upper outlet and side outlet of the bionic photocatalytic reactor 3.

[0033] The selection of the upper, lower, left and right interface plugs of the reaction unit 10 is determined by the connection method; among them, in the 3×3 bionic photocatalytic reactor, the two adjacent liquid chamber cavities are connected by interfaces and plastic hard pipes, and the lower inlet or upper outlet of the edge liquid chamber cavity that does not need to be connected is sealed with upper and lower plugs.

[0034] See also Figure 3In (A), one side of the photocatalyst plate 7 is a square quartz glass sheet loaded with a photocatalyst, and the photocatalyst is one or more of metal hydroxides, metal particles, metal oxides, perovskites, organic semiconductors, and non-metallic composite photocatalysts. The method of loading the photocatalyst includes one or more of screen printing, ultrasonic spraying, spin coating, casting, transfer, and in-situ growth. One side of the quartz glass sheet loaded with the photocatalyst is placed toward the liquid chamber cavity.

[0035] The circulation pump 1, the bionic photocatalytic reactor 3 and the liquid storage and gas collecting bottle 4 are connected through pipelines to connect the photocatalytic reaction system of the entire bionic photocatalytic reactor and transport the reaction liquid and the hydrogen and oxygen gas products generated by decomposing water.

[0036] A light source is arranged on one side of the bionic photocatalytic reactor 3 . The light source may be sunlight, a xenon lamp, an LED lamp, a mercury lamp, etc. The illumination direction of the light source faces the quartz light window 6 of the bionic photocatalytic reactor 3 .

[0037] See also Figure 4 , 9 bionic photocatalytic reactors 3 can be connected in a 3×3 mode to form an amplified photocatalytic module. The connection method should be series connection, parallel connection or series-parallel connection, and can also be connected in a 2×2-5×5 mode.

[0038] The inlet of the bionic photocatalytic reactor 3 includes a lower inlet and a side inlet, which are tightened by a lower interface plug and left and right interface plugs. The outlet of the bionic photocatalytic reactor 3 includes an upper inlet and a side outlet, which are tightened by an upper interface plug and left and right interface plugs. The lower inlet is connected to the water outlet of the circulation pump 1 through a pipeline, and the side outlet is connected to the side inlet of the adjacent reaction unit through the left and right interfaces. The edge modules that do not need to be connected are tightened by the left and right plugs. The inlet of the liquid storage and gas collecting bottle 4 is connected to the upper outlet of the bionic photocatalytic reactor 3 through a pipeline. The outlet is connected to the water inlet of the circulation pump 1 through a pipeline. The circulation pump 1 is used to transport the reaction liquid from the liquid storage and gas collecting bottle 4 through the lower inlet of the bionic photocatalytic reactor 3 to the reaction unit 10 of the bionic photocatalytic reactor 3 to participate in the photocatalytic reaction. The reaction liquid carries the gas product of photocatalytic water decomposition and flows out through the upper outlet of the bionic photocatalytic reactor 3 and returns to the liquid storage and gas collecting bottle 4. The liquid storage and gas collecting bottle 4 is inverted to collect gas by drainage method; the liquid storage and gas collecting bottle 4 simultaneously stores liquid and collects gas; the circulation pump 1 drives the reaction liquid and gas product in the bionic photocatalytic reactor to flow.

[0039] The bionic photocatalytic reactor 3 in the present invention can be applied to one or more photocatalytic reactions including photocatalytic decomposition of water to produce hydrogen, photocatalytic decomposition of water to produce oxygen, photocatalytic nitro reduction reaction, photocatalytic alcohol oxidation reaction, photocatalytic benzimidazole group synthesis reaction, photocatalytic synthesis of brominated drugs and photocatalytic [2+2] cycloaddition reaction. Example 1 The bionic photocatalytic reactor provided by the present invention is used to carry out a photocatalytic water decomposition hydrogen production reaction, which specifically includes the following steps: Step 1), boron-doped carbon nitride Z-type heterojunction photocatalyst (Nature Energy, 6, 388-397 (2021)) powder is loaded onto the surface of a quartz glass sheet by screen printing to obtain a photocatalyst plate 7; Step 2), follow Figure 3 As shown, four reaction units 10 of the bionic photocatalytic reactor 3 are assembled, and the photocatalyst plate 7 obtained in step 1) is placed between two reaction units; wherein, a tool is used to pass the fastening screws 5 through the through holes on the front cover plate 9, the rear cover plate 11, the reaction unit 10 and the sealing gasket and tighten the fastening nuts 8 to achieve the sealed assembly of the bionic photocatalytic reactor 3; Step 3), the liquid storage and gas collecting bottle 4 is filled with deionized water as the reaction liquid for the photocatalytic water decomposition reaction.

[0040] Step 5), the bionic photocatalytic reactor 3 obtained in step 2) is Figure 4 The 9 series / parallel assemblies shown are enlarged photocatalytic modules; Figure 1 As shown, the enlarged photocatalytic module is connected with the circulation pump 1, the circulation pump supporting battery 2, and the liquid storage and gas collecting bottle 4 through pipelines to form a photocatalytic reactor, and is placed outdoors to perform a water decomposition and hydrogen production test using sunlight as a light source, so that the light direction is facing the quartz window 6.

[0041] Turn on circulation pump 1, adjust the reaction liquid flow rate to 30 mL / min, invert the liquid storage and gas collecting bottle to drain water and collect gas, and collect and calculate the hydrogen production performance.

[0042] Furthermore, 9 enlarged photocatalytic modules were connected to conduct outdoor photocatalytic water splitting experiments.

[0043] Figure 5 The solar energy to hydrogen energy efficiency obtained by conducting outdoor experiments on photocatalytic water decomposition from 9:00 to 17:00 every day from June 8 to 10, 2023 for the enlarged photocatalytic module assembled by the bionic photocatalytic reactor in Example 1 of the present invention, the average solar energy to hydrogen energy efficiency reached 1.92%.

[0044] Figure 6 This is a photo of 9 enlarged photocatalytic modules connected to conduct outdoor photocatalytic water splitting experiments in Example 1 of the present invention, demonstrating the feasibility of the bionic photocatalytic reactor of the present invention being able to be stacked in multiple layers for large-scale application.

[0045] The present invention designs and develops a bionic photocatalytic reactor by imitating plant chloroplasts to solve the problem of low energy and material transfer efficiency in traditional photocatalytic reaction systems; and uses quartz glass with boron-doped carbon nitride Z-type heterojunction photocatalyst (Nature Energy, 6, 388-397 (2021) to achieve a larger area application of photocatalytic water decomposition by the multiplication method to solve the problem of low sunlight utilization efficiency; at the same time, the outdoor operation of the reaction system consisting of 9 multi-layer spliced ​​bionic photocatalytic reactors 3 clearly demonstrates the feasibility of large-scale application of multi-layer stacked photocatalytic reactors.

[0046] Compared with the traditional single-layer photocatalytic reaction device (CN118287006A; CN216863697U), the present invention further takes into account the problem of insufficient utilization of light energy by the catalyst, and realizes the full utilization of sunlight by the photocatalyst by vertically stacking the reaction units. At the same time, in order to solve the problem of reduced photocatalytic reaction efficiency after the photocatalytic reaction device is enlarged (Nature, 2021, 598, 304-307), and to realize the rapid splicing and expansion of the reaction unit, the present invention realizes the rapid expansion and splicing of the plane of the high-efficiency reaction unit by designing and constructing the interface plug, thereby achieving the digital increase coupling of the high-efficiency photocatalytic unit. The photocatalyst flat plate is set to make the catalyst directly contact the water in the liquid chamber cavity, and a photocatalytic reaction occurs under the irradiation of sunlight. The sealing gasket and fastening screws between each layer of reaction units ensure the air tightness and water tightness of the reactor.

[0047] The present invention mimics the structure of plant chloroplast thylakoids to design and develop a bionic photocatalytic reactor. Multiple reaction units are stacked by the multiplication method to achieve a larger area application of photocatalytic water splitting and enhanced system mass transfer. The multi-layer stacking of the Z-type heterojunction photocatalyst flat plate loaded with high-efficiency water splitting greatly improves the efficiency of sunlight utilization. At the same time, the outdoor operation of the reaction system composed of multiple bionic photocatalytic reactors in series / parallel clearly demonstrates the feasibility of large-scale application of multi-layer stacked photocatalytic reactors. The present invention solves the problems of low sunlight utilization efficiency and difficult energy and material transfer in traditional photocatalytic systems, and provides a simple, fast, low-cost, efficient and feasible solution for the large-scale application of photocatalytic technology.

[0048] The above description is only for the best embodiment of the present invention, but it should not be understood as limiting the claims. The present invention is not limited to the above embodiments, and its specific structure is allowed to be changed. However, all changes made within the protection scope of the independent claims of the present invention are within the protection scope of the present invention.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

Claims

1. A bionic photocatalytic reactor, It is characterized in that It comprises a circulation pump (1), a bionic photocatalytic reactor (3) and a liquid storage and gas collection bottle (4); the circulation pump (1) is connected to the bionic photocatalytic reactor (3), the bionic photocatalytic reactor (3) is connected to the liquid storage and gas collection bottle (4), and the liquid storage and gas collection bottle (4) is connected to the circulation pump (1); The bionic photocatalytic reactor (3) is formed by stacking, connecting in series, in parallel, or in series and parallel with a plurality of reaction units (10).

2. The biomimetic photocatalytic reactor according to claim 1, It is characterized in that Also included is a circulating pump matching battery (2) connected to the circulating pump (1).

3. The biomimetic photocatalytic reactor according to claim 1, It is characterized in that The bionic photocatalytic reactor (3) comprises a front cover plate (9), a plurality of reaction units (10), a rear cover plate (11) and a sealing gasket; wherein the front cover plate (9) is arranged on one side of the reaction unit (10), and the rear cover plate (11) is arranged on the other side; and sealing gaskets are arranged between the plurality of reaction units (10) and the front cover plate (9), and between the reaction units (10) and the rear cover plate (11).

4. The bionic photocatalytic reactor according to claim 1, It is characterized in that The reaction unit (10) comprises a plurality of liquid chamber cavities stacked together and connected to each other, a photocatalyst plate (7) is arranged between adjacent liquid chamber cavities, and a quartz light window (6) is arranged between the liquid chamber cavities and the front cover plate (9).

5. The biomimetic photocatalytic reactor according to claim 1, It is characterized in that Each liquid chamber cavity is provided with an interface, and a plug is provided at the interface.

6. The biomimetic photocatalytic reactor according to claim 5, It is characterized in that The plug comprises an upper interface plug (12), a lower interface plug (14), a left interface plug (15) and a right interface plug (13); the liquid chamber cavity, the front cover plate (9), the rear cover plate (11), the upper interface plug (12), the right interface plug (13), the lower interface plug (14) and the left interface plug (15) are all made of polyetheretherketone, polytetrafluoroethylene or resin material; the liquid chamber cavity is square, round or rectangular.

7. The biomimetic photocatalytic reactor according to claim 1, It is characterized in that One side of the photocatalyst flat plate (7) is a square quartz glass sheet loaded with a Z-type heterojunction photocatalyst, and the photocatalyst is one or more of metal hydroxides, metal particles, metal oxides, perovskites, organic semiconductors and non-metallic composite photocatalysts.

8. The biomimetic photocatalytic reactor according to claim 1, It is characterized in that The photocatalyst loading method includes one or more of screen printing, ultrasonic spraying, spin coating, casting, transfer printing and in-situ growth method.

9. The biomimetic photocatalytic reactor according to claim 1, It is characterized in that A light source is provided on one side of the bionic photocatalytic reactor (3); the light source is sunlight, a xenon lamp, an LED lamp or a mercury lamp; the illumination direction of the light source faces the quartz light window (6) of the bionic photocatalytic reactor (3).

10. The biomimetic photocatalytic reactor according to claim 1, It is characterized in that The biomimetic photocatalytic reactor (3) is used for one or more of the following photocatalytic reactions: photocatalytic decomposition of water to produce hydrogen, photocatalytic decomposition of water to produce oxygen, photocatalytic nitro reduction, photocatalytic alcohol oxidation, photocatalytic benzimidazole group synthesis, photocatalytic synthesis of brominated drugs, and photocatalytic [2+2] cycloaddition.

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