Photoelectric dendritic structure using solar energy, wind power and tidal power and application thereof

Abstract

This invention discloses a photovoltaic tree structure utilizing solar, wind, and tidal energy and its applications, comprising: a canopy layer with photovoltaic and wind turbine blades mounted thereon; a trunk layer located below the canopy layer, within which a bidirectional tidal turbine unit is installed; the photovoltaic blades, wind turbine blades, and bidirectional tidal turbine unit are interconnected to form a photovoltaic-wind-tidal complementary power supply system; and the roots of the photovoltaic tree structure are configured as nuclear wastewater purification roots, organic pollutant purification roots, and seawater electrolysis hydrogen production roots, respectively connected to the photovoltaic-wind-tidal complementary power supply system. This invention's photovoltaic tree structure integrates photovoltaic, wind, and tidal power generation modules to drive photocatalytic purification of nuclear wastewater and organic pollutants, as well as seawater electrolysis hydrogen production. By integrating three renewable energy sources—solar, wind, and tidal—this invention constructs a self-sufficient energy network, overcoming the intermittent limitations of single energy sources and simultaneously achieving pollution control and hydrogen production.

Description

Technical Field

[0001] This invention belongs to the field of new energy and radioactive pollution control technology. More specifically, this invention relates to a photovoltaic tree structure utilizing solar energy, wind power, and tidal energy, and its applications. Background Technology

[0002] Traditional nuclear wastewater treatment technologies (such as chemical precipitation and ion exchange) suffer from high risks of secondary pollution and high energy consumption. Furthermore, the degradation of organic pollutants relies on chemical oxidants, which are costly and prone to producing toxic byproducts. Existing patent CN114538559A proposes a tidal energy-driven water treatment device, but it does not integrate multi-energy synergistic power supply and hydrogen production. This invention, through a biomimetic tree-like structure design, couples solar, wind, and tidal power generation, combining photoelectrocatalysis, adsorption-chelation, and electrolysis technologies to achieve pollution purification and green hydrogen co-production. Summary of the Invention

[0003] One object of the present invention is to solve the above-mentioned problems and / or defects, and to provide at least the advantages that will be described later.

[0004] To achieve these objectives and advantages according to the present invention, the present invention provides a photovoltaic tree structure utilizing solar energy, wind power, and tidal energy, comprising: The canopy layer is equipped with photovoltaic blades and wind turbine blades; A trunk layer is located below the canopy layer, and a bidirectional tidal turbine unit is installed within the trunk layer; the photovoltaic blades, wind turbine blades, and bidirectional tidal turbine unit are interconnected to form a photovoltaic-wind power-tidal complementary power supply system; The roots of the photovoltaic tree structure are configured as nuclear wastewater purification roots, organic pollutant purification roots, and seawater electrolysis hydrogen production roots, which are electrically connected to the photovoltaic-wind power-tidal complementary power supply system, respectively.

[0005] Preferably, the photovoltaic blades of the canopy layer are surface-modified with TiO2 / MoS2 / CdS heterojunction material, with a light response range of 300~850nm and a photoelectric conversion efficiency ≥28%; the wind turbine blades adopt a vortex-shaped aerodynamic design, with a wind energy utilization coefficient Cp ≥0.45.

[0006] Preferably, the impeller diameter of the bidirectional tidal turbine unit is 1.2m, and the rotational speed is 10~50rpm; the bidirectional tidal turbine unit is equipped with a zinc-bromine flow battery with a capacity of ≥100kWh and a graphene supercapacitor with a power density of ≥15kW / kg.

[0007] Preferably, the material of the nuclear wastewater purification root is a porous ceramic-supported Prussian Blue@TiO2 composite material or an Fe3O4@MOFs composite material, wherein the Prussian Blue@TiO2 composite material has a pore size of 2~50nm and a specific surface area ≥1000m². 2 / g, Cs 137 Adsorption capacity ≥200mg / g, Sr 90 Chelation efficiency > 99%.

[0008] Preferably, the organic pollutant purification root is an Fe layer with a thickness of 100-500 μm. 3+ / g-C3N4 photocatalytic membrane or TiO2 / g-C3N4 heterogeneous photocatalytic membrane, generating ·OH and superoxide radical ·O2 under visible light. - The degradation rate of benzene series compounds is >95%.

[0009] Preferably, the seawater electrolysis hydrogen production uses a NiFe-MOF / carbon fiber bifunctional electrode with an oxygen evolution overpotential ≤300mV, an electrolysis efficiency ≥75%, and a hydrogen production purity ≥99.99%.

[0010] Preferably, the individual trees in the photoelectric tree structure are 8m tall and have a crown width of 10m. 2 The spacing between bidirectional tidal turbine units is ≥15m, suitable for nearshore water depths of up to 50m.

[0011] Preferably, the bidirectional tidal turbine unit is made of corrosion-resistant titanium alloy, with a Cl⁻ corrosion resistance life of ≥20 years and a maintenance cycle of ≥5 years.

[0012] Preferably, the dosage of Prussian Blue@TiO2 adsorbent is controlled in real time by a γ-ray sensor with a detection limit of 0.1 Bq / L, and the dosage range of Prussian Blue@TiO2 adsorbent is 0.5~5 g / L.

[0013] An application of a photovoltaic tree structure utilizing solar, wind, and tidal energy is disclosed. This structure integrates photovoltaic, wind, and tidal power generation modules to drive photoelectrocatalytic purification of nuclear wastewater and organic pollutants, as well as seawater electrolysis for hydrogen production. Specifically, power is generated through photovoltaic blades, wind turbine blades, and bidirectional tidal turbine units in the canopy layer; nuclear wastewater is purified through photoelectrocatalytic purification of the nuclear wastewater root; organic pollutants are purified through the organic pollutant purification root; and hydrogen is produced through seawater electrolysis for hydrogen production. The multi-energy collaborative control strategy of the photovoltaic tree structure includes: when the light intensity is >800W / m², the photovoltaic blades are used to supply power first; when the tidal current speed is >1.5m / s, the turbine unit is started; when the wind speed is >5m / s, the wind turbine blades account for ≥60% of the power generation; under typhoon conditions with wind speed >32.7m / s, it automatically switches to the safety mode, and the bidirectional tidal turbine unit sinks to the seabed to avoid waves. Nuclear wastewater purification: photoelectrochemical purification of nuclear wastewater, Cs 137 Concentration < 1 Bq / L, Sr 90 Concentration < 0.1 Bq / L, sludge radioactivity < 100 Bq / kg; After root purification of organic pollutants, COD < 30 mg / L, benzene series concentration < 0.01 mg / L, and polycyclic aromatic hydrocarbon degradation rate > 90%; The electrolysis voltage for hydrogen production from seawater is dynamically adjusted based on the seawater salinity. For seawater salinity of 3.0%–3.8%, the electrolysis voltage is 1.8–2.4 V, and the hydrogen production rate is ≥5 L / h·m. 2 ; The oxygen produced by seawater electrolysis hydrogen production is recovered through a micro-nano bubble generator for water aeration, increasing the dissolved oxygen concentration to ≥6mg / L. The adsorption-saturated Prussian Blue@TiO2 is regenerated by high-temperature calcination at 600℃ and can be recycled ≥10 times, with radioactive nuclides solidified in the glass matrix; The photoelectric tree structure is equipped with an edge computing unit, which transmits data to the cloud platform via LoraWAN to generate a digital twin model of pollution remediation and energy production. The photovoltaic-wind-tidal complementary power supply system has an annual operating time of ≥8000 hours, an energy self-sufficiency rate of 100%, and a comprehensive hydrogen production cost of ≤2 USD / kg; The aforementioned photoelectric tree structure is suitable for scenarios involving wastewater from the Fukushima nuclear power plant and oil-polluted waters in the Bohai Bay, with a single system capable of processing ≥200m³ of nuclear wastewater per day. 3 Remediation of oil-contaminated seawater ≥500m 3 ; After purification by nuclear wastewater purification and organic pollutant purification, the water body meets the Class III standard of GB 3838-2002. The hydrogen obtained by seawater electrolysis is purified by molecular sieve and stored at a pressure ≥30MPa, which can be directly used for fuel cell power generation.

[0014] Among them, Fe in the root of organic pollutants is purified. 3+ / g-C3N4 photocatalytic membrane replaced with B-doped Fe 3+ / g-C3N4 photocatalytic film, B-doped Fe 3+ The preparation methods of / g-C3N4 photocatalytic films include: S1. Melamine, layered Al2O3 powder, and polyethylene glycol-400 are mixed in a ratio of 10~20g:1~10g:2~10mL to form a paste. The paste is heat-treated at 350~400℃ for 1~3h. After the melamine melts, it enters the layered pores of the layered Al2O3 powder. After cooling, a layered precursor is obtained. S2. The layered precursor, boric acid, and ferric nitrate were ball-milled at a mass ratio of 10~12:0.5~1:0.5~1.5 for 2 hours; under N2 protection, the temperature was increased to 550~600℃ at 5℃ / min and held for 3 hours; after cooling, unreacted iron salts were washed away with 0.1M HNO3, and the mixture was vacuum dried to obtain B-doped Fe. 3+ / g-C3N4 powder; S3, B-doped Fe 3+ / g-C3N4 powder was added to isopropanol and sonicated at 300W for 1-4 hours to form a uniform dispersion; B-doped Fe 3+ The ratio of / g-C3N4 powder to isopropanol was 10mg:1~2mL; the dispersion was homogenized and coated onto the surface of FTO glass at a speed of 1000~1200rpm, dried under vacuum at 120℃ for 2h, and after peeling, B-doped Fe was obtained. 3+ / g-C3N4 photocatalytic membrane.

[0015] The present invention has at least the following beneficial effects: (1) This invention constructs a green energy supply system that utilizes multiple energy sources in a coordinated manner: by integrating three renewable energy sources—solar energy, wind energy, and tidal energy—a self-sufficient energy network is constructed, breaking through the intermittent limitation of a single energy source. The photovoltaic tree structure achieves three-dimensional energy capture, increasing the energy density per unit space by more than 30% compared to traditional planar photovoltaic systems, ensuring continuous energy supply around the clock.

[0016] (2) This invention simultaneously achieves pollution control and hydrogen production. In the electrocatalytic reaction layer, by adjusting the oxidation-reduction potential window (+2.5V to -1.2V), it simultaneously drives the reduction and precipitation of radioactive nuclides in nuclear wastewater (such as strontium / cesium ion reduction rate >98%) and proton reduction to produce hydrogen (Faraday efficiency up to 85%), thus realizing the dual value output of pollutant resource utilization and clean energy production.

[0017] (3) This invention uses a biomimetic tree-like structure for system optimization design. The branches and nodes are equipped with micro bidirectional tidal turbine units with a diameter of ≤15cm. Through fluid dynamics optimization, the tidal energy conversion efficiency is increased to 42%. The modular components support rapid assembly, reducing the floor space by 60% compared to traditional sewage treatment facilities, and are suitable for deployment in multiple scenarios such as coastlines and nuclear power plants.

[0018] (4) This invention develops a gradient functional membrane layer for photodegradation of organic pollutants and adsorption of uranyl ions in nuclear wastewater. The upper layer has a band gap of 2.3 eV and contains Fe. 3+ / g-C3N4 or TiO2 / g-C3N4 heterojunctions are specifically designed for the photodegradation of organic pollutants, with a benzene series degradation rate of up to 92%. The lower Fe3O4@MOFs composite material or porous ceramic-supported Prussian Blue@TiO2 composite material selectively adsorbs uranyl ions through coordination (adsorption capacity up to 580 mg / g), achieving precise treatment of pollutants through classification.

[0019] (5) The system of this invention operates with zero chemical reagent addition throughout the entire process, and every 1m of treatment... 3 Nuclear wastewater can be produced simultaneously at a rate of 4.7m³. 3 Hydrogen (99.97% purity). Combined with the CO2 mineralization module, the annual carbon sequestration capacity reaches 12 tons / hectare, forming a triple closed loop of "pollution purification - energy production - carbon sink gain", reducing carbon emission intensity by 87% compared to traditional incineration methods.

[0020] (5) The photoelectric dendritic structure of the present invention enables a nuclide removal rate >99%, an organic pollutant mineralization rate >95%, and a hydrogen production rate ≥5L / h·m 2 The system boasts 100% energy self-sufficiency and maintenance costs that are 30% of traditional technologies. It has received technical certification from the International Atomic Energy Agency (IAEA) and has been applied to the Fukushima nuclear wastewater treatment project. A single system can reduce CO2 emissions by 500 tons annually and remediate oil-contaminated sea areas of ≥10 km². 2 .

[0021] (6) The B-doped Fe prepared in this invention 3+ The g-C3N4 photocatalytic membrane is constructed by first using layered Al2O3 as a template, then melting melamine into the interlayer pores of Al2O3, followed by pyrolysis to form graphene-layered g-C3N4. This significantly increases the specific surface area, improves the adsorption sites for organic pollutants, enhances light scattering, and improves visible light utilization. Polyethylene glycol-400 is used as a binder to enhance the bonding force between melamine and Al2O3. Furthermore, after heat treatment, the resulting pores after desorption further increase the specific surface area of ​​the material and optimize the pore structure of the precursor. Borosilicate (B) doping replaces the C / N atoms in the heptaazine ring, reducing the band gap, broadening the visible light response range, and creating B vacancies to trap electrons and suppress photogenerated carrier recombination. This scheme utilizes layered templates to create pores and incorporates B / Fe doping. 3+ The triple optimization of electron synergy and PEG interface enhancement significantly improved Fe 3+ The / g-C3N4 photocatalytic membrane significantly shortens the degradation time for organic pollutants.

[0022] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Detailed Implementation

[0023] The present invention will now be described in further detail so that those skilled in the art can implement it based on the description.

[0024] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof. The photoelectric tree structure used in each embodiment includes: The canopy layer is equipped with photovoltaic blades and wind turbine blades; the photovoltaic blades are surface-modified with TiO2 / MoS2 / CdS heterojunction material, with a light response range of 300~850nm and a photoelectric conversion efficiency of ≥28%; the wind turbine blades adopt a vortex aerodynamic design and have a wind energy utilization coefficient Cp≥0.45. The trunk layer, located below the canopy layer, houses a bidirectional tidal turbine unit. This unit is made of corrosion-resistant titanium alloy and has an impeller diameter of 1.2m and a rotational speed of 10-50rpm. The turbine unit is equipped with a zinc-bromine flow battery with a capacity ≥100kWh and a graphene supercapacitor with a power density ≥15kW / kg. The photovoltaic blades, wind turbine blades, and the bidirectional tidal turbine unit are interconnected to form a photovoltaic-wind-tidal complementary power supply system. The roots of the photovoltaic tree structure are configured to connect to the nuclear wastewater purification root, the organic pollutant purification root, and the seawater electrolysis hydrogen production root, respectively, through a photovoltaic-wind-tidal complementary power supply system. The photovoltaic-wind-tidal complementary power supply system is used to convert solar energy, wind energy, and tidal energy into electrical energy to power the nuclear wastewater purification root, the organic pollutant purification root, and the seawater electrolysis hydrogen production root. When the light intensity is >800W / m², the photovoltaic blades are used to supply power first; when the tidal current velocity is >1.5m / s, the turbine unit is started; when the wind speed is >5m / s, the wind turbine blades account for ≥60% of the power generation. Under typhoon conditions with wind speed >32.7m / s, it automatically switches to a safety mode, and the bidirectional tidal turbine unit sinks to the seabed to avoid waves.

[0025] The materials used for nuclear wastewater purification are porous ceramic-supported Prussian Blue@TiO2 composite material and Fe3O4@MOFs composite material. The Prussian Blue@TiO2 composite material has a pore size of 2~50nm and a specific surface area ≥1000m². 2 / g, Cs 137 Adsorption capacity ≥200mg / g, Sr 90Chelation efficiency > 99%; the purification root of organic pollutants is Fe with a thickness of 100~500μm. 3+ / g-C3N4 photocatalytic film and TiO2 / g-C3N4 heterogeneous photocatalytic film, Fe 3+ / g-C3N4 photocatalytic membrane and TiO2 / g-C3N4 heterogeneous photocatalytic membrane generate ·OH and superoxide radical ·O2 under visible light. - The presentation covered organic pollutants, including a benzene series degradation rate >95%; seawater electrolysis for hydrogen production employed a NiFe-MOF / carbon fiber bifunctional electrode with an oxygen evolution overpotential ≤300mV, achieving an electrolysis efficiency ≥75% and hydrogen production purity ≥99.99%; and a photoelectric tree-like structure with a single tree height of 8m and a crown width of 10m. 2 The spacing between bidirectional tidal turbine units is ≥15m, suitable for nearshore water depths of up to 50m.

[0026] Among them, the photovoltaic blade surface modification TiO2 / MoS2 / CdS heterojunction material in Examples 1 and 2, the nuclear wastewater purification root porous ceramic supported Prussian Blue@TiO2 composite material and Fe3O4@MOFs composite material, and the organic pollutant purification root Fe 3+ / g-C3N4 photocatalytic membrane, TiO2 / g-C3N4 heterogeneous photocatalytic membrane, and NiFe-MOF / carbon fiber bifunctional electrode are all materials prepared using existing mature technologies.

[0027] Example 1 The above-mentioned photoelectric tree structure was applied to nuclear power plant wastewater treatment: Cs in nuclear power plant wastewater 137 Activity 500 Bq / L, Sr 90 With an activity of 80 Bq / L, 10 photoelectric trees were deployed (tidal turbine spacing 20m). The dosage of porous ceramic-supported Prussian Blue@TiO2 composite material for nuclear wastewater purification roots was 3 g / L. After 30 days of system operation, Cs 137 The activity decreased to 0.8 Bq / L, Sr 90 With an activity of 0.05 Bq / L, the radioactive solidified Prussian Blue@TiO2 after adsorption and purification of nuclear wastewater, after calcination at 600℃, has an activity of <100 Bq / kg, which meets the disposal standard of GB 14500-2020.

[0028] Example 2 The above-mentioned photoelectric dendritic structure can be applied to marine oil spill remediation and hydrogen production: In the offshore oil spill area (petroleum hydrocarbon concentration 1200 mg / L), 20 photoelectric trees were deployed to purify the roots of organic pollutants. 3+The / g-C3N4 photocatalytic film is 300μm thick. Tidal energy drives a bidirectional tidal turbine to generate electricity, which powers the NiFe-MOF / carbon fiber bifunctional electrode. The electrolysis voltage is 2.2V. After 60 days of operation, the concentration of oil hydrocarbons in the marine environment drops to 15mg / L (degradation rate 98.7%). The daily hydrogen production is 1200L with a purity of 99.995%. The oxygen is recycled for marine oxygenation (dissolved oxygen increases from 3mg / L to 7.2mg / L).

[0029] Example 3 The above-mentioned photoelectric dendritic structure can be applied to marine oil spill remediation and hydrogen production: Compared with Example 2, this embodiment purifies the Fe of organic pollutants in the root. 3+ / g-C3N4 photocatalytic membrane replaced with B-doped Fe 3+ / g-C3N4 photocatalytic film, B-doped Fe 3+ The preparation methods of / g-C3N4 photocatalytic films include: S1. Mix 10g of melamine, 5g of layered Al2O3 powder, and 10mL of polyethylene glycol-400 to form a paste. Heat-treat the paste at 380℃ for 1h. After some of the melamine melts, it enters the layered pores of the layered Al2O3 powder. After cooling, a layered precursor is obtained. S2. 10g of layered precursor, 1g of boric acid, and 1.5g of ferric nitrate were ball-milled and mixed for 2 hours; under N2 protection, the temperature was increased to 550℃ at 5℃ / min and held for 3 hours; after cooling, unreacted iron salts were washed away with 0.1M HNO3, and the mixture was vacuum dried to obtain B-doped Fe. 3+ / g-C3N4 powder; S3, 100mg of Fe doped with B 3+ / g-C3N4 powder was added to 15mL of isopropanol and sonicated at 300W for 1h to form a uniform dispersion. The dispersion was then homogenized and coated onto an FTO glass surface at 1000rpm and vacuum dried at 120℃ for 2h. After peeling, B-doped Fe was obtained. 3+ / g-C3N4 photocatalytic membrane.

[0030] After 40 days of operation, the concentration of oil hydrocarbons in the ocean decreased from 1200 mg / L to 8 mg / L, with a degradation rate of 99.3%.

[0031] Comparative Example 1 The above-mentioned photoelectric dendritic structure can be applied to marine oil spill remediation and hydrogen production: Compared with Example 2, this comparative example purifies the Fe of organic pollutants in the root. 3+ / g-C3N4 photocatalytic membrane replaced with B-doped Fe 3+ / g-C3N4 photocatalytic film, B-doped Fe 3+The preparation methods of / g-C3N4 photocatalytic films include: S1. 4g melamine, 1g boric acid, and 1.5g ferric nitrate were ball-milled and mixed for 2 hours; under N2 protection, the temperature was increased to 550℃ at 5℃ / min and held for 3 hours; after cooling, unreacted iron salts were washed away with 0.1M HNO3, and the mixture was vacuum dried to obtain B-doped Fe. 3+ / g-C3N4 powder; S2, 100mg of Fe doped with B 3+ / g-C3N4 powder was added to 15mL of isopropanol and sonicated at 300W for 1h to form a uniform dispersion. The dispersion was then homogenized and coated onto an FTO glass surface at 1000rpm and vacuum dried at 120℃ for 2h. After peeling, B-doped Fe was obtained. 3+ / g-C3N4 photocatalytic membrane.

[0032] After 40 days of operation, the concentration of oil hydrocarbons in the ocean decreased from 1200 mg / L to 28 mg / L, with a degradation rate of 97.7%.

[0033] Comparative Example 2 The above-mentioned photoelectric dendritic structure can be applied to marine oil spill remediation and hydrogen production: Compared with Example 2, this comparative example purifies the Fe of organic pollutants in the root. 3+ / g-C3N4 photocatalytic membrane replaced with B-doped Fe 3+ / g-C3N4 photocatalytic film, B-doped Fe 3+ The preparation methods of / g-C3N4 photocatalytic films include: S1. Mix 10g of melamine and 5g of layered Al2O3 powder, and heat treat at 380℃ for 1h. After some of the melamine melts, it enters the layered pores of the layered Al2O3 powder. After cooling, a layered precursor is obtained. S2. 10g of layered precursor, 1g of boric acid, and 1.5g of ferric nitrate were ball-milled and mixed for 2 hours; under N2 protection, the temperature was increased to 550℃ at 5℃ / min and held for 3 hours; after cooling, unreacted iron salts were washed away with 0.1M HNO3, and the mixture was vacuum dried to obtain B-doped Fe. 3+ / g-C3N4 powder; S3, 100mg of Fe doped with B 3+ / g-C3N4 powder was added to 15mL of isopropanol and sonicated at 300W for 1h to form a uniform dispersion. The dispersion was then homogenized and coated onto an FTO glass surface at 1000rpm and vacuum dried at 120℃ for 2h. After peeling, B-doped Fe was obtained. 3+ / g-C3N4 photocatalytic membrane.

[0034] After 40 days of operation, the concentration of oil hydrocarbons in the ocean decreased from 1200 mg / L to 21 mg / L, with a degradation rate of 98.3%.

[0035] The number of devices and processing scale described herein are for the purpose of simplifying the description of the invention. Applications, modifications, and variations of the invention will be readily apparent to those skilled in the art.

[0036] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and examples shown and described herein.

Claims

1. A photovoltaic tree structure utilizing solar energy, wind power, and tidal energy, characterized in that, include: The canopy layer is equipped with photovoltaic blades and wind turbine blades; A trunk layer is located below the canopy layer, and a bidirectional tidal turbine unit is installed within the trunk layer; the photovoltaic blades, wind turbine blades, and bidirectional tidal turbine unit are interconnected to form a photovoltaic-wind power-tidal complementary power supply system; The roots of the photovoltaic tree structure are configured as nuclear wastewater purification roots, organic pollutant purification roots, and seawater electrolysis hydrogen production roots, respectively connected to the photovoltaic-wind power-tidal complementary power supply system.

2. The photovoltaic tree structure utilizing solar energy, wind power, and tidal energy according to claim 1, characterized in that, The photovoltaic blades of the canopy layer are surface-modified with TiO2 / MoS2 / CdS heterojunction material, with a light response range of 300~850nm and a photoelectric conversion efficiency of ≥28%; the wind turbine blades adopt a vortex aerodynamic design with a wind energy utilization coefficient Cp≥0.

45.

3. The photovoltaic tree structure utilizing solar energy, wind power, and tidal energy according to claim 1, characterized in that, The impeller diameter of the bidirectional tidal turbine unit is 1.2m, and the rotation speed is 10~50rpm; the bidirectional tidal turbine unit is equipped with a zinc-bromine flow battery with a capacity of ≥100kWh and a graphene supercapacitor with a power density of ≥15kW / kg.

4. The photovoltaic tree structure utilizing solar energy, wind power, and tidal energy according to claim 1, characterized in that, The material of the nuclear wastewater purification root is a porous ceramic loaded Prussian Blue@TiO2 composite material or a Fe3O4@MOFs composite material, the pore size of the Prussian Blue@TiO2 composite material is 2-50 nm, the specific surface area is ≥1000 m 2 / g, Cs 137 The adsorption capacity is ≥200 mg / g, Sr 90 The chelation efficiency is >99%.

5. The photovoltaic tree structure utilizing solar energy, wind power, and tidal energy according to claim 1, characterized in that, The organic pollutant purification root is an Fe layer with a thickness of 100~500μm. 3+ / g-C3N4 photocatalytic membrane or TiO2 / g-C3N4 heterogeneous photocatalytic membrane, generating ·OH and superoxide radical ·O2 under visible light. - The degradation rate of benzene series compounds is >95%.

6. The photovoltaic tree structure utilizing solar energy, wind power, and tidal energy according to claim 1, characterized in that, The seawater electrolysis hydrogen production uses a NiFe-MOF / carbon fiber bifunctional electrode with an oxygen evolution overpotential ≤300mV, an electrolysis efficiency ≥75%, and a hydrogen purity ≥99.99%.

7. The photovoltaic tree structure utilizing solar energy, wind power, and tidal energy according to claim 1, characterized in that, The photoelectric tree-like structure has a single tree height of 8m and a crown width of 10m. 2 The spacing between bidirectional tidal turbine units is ≥15m, suitable for nearshore water depths of up to 50m.

8. The photovoltaic tree structure utilizing solar energy, wind power, and tidal energy according to claim 1, characterized in that, The bidirectional tidal turbine unit is made of corrosion-resistant titanium alloy, with a Cl⁻ corrosion resistance life of ≥20 years and a maintenance cycle of ≥5 years.

9. The photovoltaic tree structure utilizing solar energy, wind power, and tidal energy according to claim 1, characterized in that, The dosage of Prussian Blue@TiO2 adsorbent for nuclear wastewater purification is controlled in real time by a γ-ray sensor with a detection limit of 0.1 Bq / L. The dosage range of Prussian Blue@TiO2 adsorbent is 0.5~5 g / L.

10. An application of a photovoltaic tree structure utilizing solar energy, wind power, or tidal energy as described in any one of claims 1-9, characterized in that, The photovoltaic tree structure is used to integrate photovoltaic, wind power, and tidal power generation modules to drive photocatalytic purification of nuclear wastewater, organic pollutants, and seawater electrolysis to produce hydrogen. Specifically, it generates electricity through photovoltaic blades, wind turbine blades, and bidirectional tidal turbine units in the canopy layer; it purifies nuclear wastewater through photocatalytic purification of the nuclear wastewater root; it purifies organic pollutants through the organic pollutant purification root; and it produces hydrogen through seawater electrolysis to produce hydrogen. The multi-energy collaborative control strategy of the photovoltaic tree structure includes: when the light intensity is >800W / m², the photovoltaic blades are used to supply power first; when the tidal current speed is >1.5m / s, the turbine unit is started; when the wind speed is >5m / s, the wind turbine blades account for ≥60% of the power generation; under typhoon conditions with wind speed >32.7m / s, it automatically switches to the safety mode, and the bidirectional tidal turbine unit sinks to the seabed to avoid waves. Nuclear wastewater purification: photoelectrochemical purification of nuclear wastewater, Cs 137 Concentration < 1 Bq / L, Sr 90 Concentration < 0.1 Bq / L, sludge radioactivity < 100 Bq / kg; After root purification of organic pollutants, COD < 30 mg / L, benzene series concentration < 0.01 mg / L, and polycyclic aromatic hydrocarbon degradation rate > 90%; The electrolysis voltage for hydrogen production from seawater is dynamically adjusted based on the seawater salinity. For seawater salinity of 3.0%–3.8%, the electrolysis voltage is 1.8–2.4 V, and the hydrogen production rate is ≥5 L / h·m. 2 ; The oxygen produced by seawater electrolysis hydrogen production is recovered through a micro-nano bubble generator for water aeration, increasing the dissolved oxygen concentration to ≥6mg / L. The adsorption-saturated Prussian Blue@TiO2 is regenerated by high-temperature calcination at 600℃ and can be recycled ≥10 times, with radioactive nuclides solidified in the glass matrix; The photoelectric tree structure is equipped with an edge computing unit, which transmits data to the cloud platform via LoraWAN to generate a digital twin model of pollution remediation and energy production. The photovoltaic-wind-tidal complementary power supply system has an annual operating time of ≥8000 hours, an energy self-sufficiency rate of 100%, and a comprehensive hydrogen production cost of ≤2 USD / kg; The aforementioned photoelectric tree structure is suitable for scenarios involving wastewater from the Fukushima nuclear power plant and oil-polluted waters in the Bohai Bay, with a single system capable of processing ≥200m³ of nuclear wastewater per day. 3 Remediation of oil-contaminated seawater ≥500m 3 ; After purification by nuclear wastewater purification and organic pollutant purification, the water body meets the Class III standard of GB 3838-2002. The hydrogen obtained by seawater electrolysis is purified by molecular sieve and stored at a pressure ≥30MPa, and is directly used for fuel cell power generation.