Water absorption power generation device based on TiO2 thin film and preparation method and application of water absorption power generation device

Abstract

The invention belongs to the technical field of new energy power generation equipment, and particularly discloses a water absorption power generation device based on a TiO2 film and a preparation method and application thereof.The power generation device comprises a power generation assembly and an aqueous solution or water vapor or an aqueous ion solution, and the power generation assembly comprises a first electrode, a diaphragm and a second electrode; the first electrode is an FTO-TiO2 thin film, and the second electrode is a conductive electrode which is not easy to corrode. According to the water absorption power generation device based on the TiO2 thin film and the preparation method and application thereof, the prepared power generation device generates electric energy under the condition of low water content, and different from a traditional water evaporation power generation device structure, the power generation device adopts a sandwich device power generation structure and has the advantages of being simple, high in reliability, rapid in power generation and the like.

Description

Technical Field

[0001] The present invention belongs to the technical field of new energy power generation equipment, and specifically relates to a power generation device based on TiO2 thin film absorbing moisture, and a preparation method and application thereof. Background Art

[0002] In recent years, with the continuous reduction of fossil fuels and the intensification of environmental problems, people's demand and attention for green energy have been growing. Solar cells, wind turbines, thermoelectric conversion devices, etc. have become key technologies in the field of green energy. However, they still have some limitations under specific conditions. For example, solar cells require sufficient sunlight to generate electricity, while new electromechanical transducer devices require external mechanical motion. In view of this, it is recognized that the technical problems of generating electricity under no light conditions or without external mechanical motion need to be solved urgently. At the same time, in view of the limitations of existing green energy equipment under specific conditions, this field urgently needs to develop a new solution that can generate electricity in an environment without light and external mechanical motion. Therefore, the power generation device that uses humidity and moisture as an energy source is expected to fill the gaps in existing technologies and bring more possibilities and solutions to the field of green energy.

[0003] Chinese invention patent CN105591166A discloses a carbon material-based power generation device, which includes a power generation component and a volatile liquid, wherein the power generation component includes an electrically insulating carrier, a first electrode and a second electrode disposed on the surface of the carrier, which do not intersect with each other, and a carbon material layer deposited as a whole between the two electrodes and forming a conductive path with the two electrodes; one end of the carbon material layer is always immersed in the volatile liquid, and the other end is exposed to the environment outside the surface of the volatile liquid. The difference in the interaction between the liquid vaporization and the carbon material in different areas between the two electrodes is used to form an electric potential difference between the first electrode and the second electrode. Although the invention has the ability to continuously generate electricity when one end is immersed in an aqueous solution, its power generation performance cannot be achieved by exhaling on its surface when there is very little water, and the shedding of the carbon material solution affects the power generation performance.

[0004] Chinese utility model patent CN204190653U discloses a volatile liquid-based power generation device comprising a power generation assembly and a container containing the volatile liquid. The power generation assembly comprises an electrically insulating substrate, a first electrode and a second electrode disposed on the surface of the substrate, each non-intersecting, and a carbon material layer integrally deposited between the two electrodes to form a conductive path with the two electrodes. One end of the carbon material layer is always immersed in the volatile liquid, while the other end is exposed to the environment outside the surface of the volatile liquid. Although this utility model utilizes a carbon film structure, it relies on the volatilization of the solution and cannot absorb moisture from the environment.

[0005] Chinese invention patent CN115642834A discloses a water evaporation-induced power generation material based on carbonized biomass and its preparation method. The invention comprises carbonizing the biomass feedstock, washing it, and drying it to obtain a carbonized biomass material. The carbonized biomass material, ethyl cellulose, pine oleyl alcohol, and ethanol are mixed and ultrasonically dispersed. The material is concentrated in an oil bath and then applied to a flat plate. Annealing is performed, and electrodes are wound around the ends of the plate after annealing. The water evaporation-induced power generation material is obtained through a water evaporation process. While this invention is simple to operate and utilizes carbonized biomass, it ultimately relies on the use of carbon materials, making it difficult to innovate and develop.

[0006] Therefore, the art needs to develop a power generation device based on TiO2 thin film absorbing water and its preparation method and application, which can effectively solve the above problems. Summary of the Invention

[0007] The purpose of the present invention is to provide a power generation device based on TiO2 thin film absorption of water, its preparation method and application. The prepared power generation device generates electricity under low water content conditions. Unlike the traditional water evaporation power generation device structure, the power generation device adopts a sandwich device power generation structure, which has the characteristics of simplicity, strong reliability, and rapid power generation.

[0008] To achieve the above-mentioned objectives, the present invention provides a power generation device based on TiO2 thin film absorption of water, comprising a power generation component and an aqueous solution or water vapor or aqueous ion solution, the power generation component comprising a first electrode, a diaphragm, and a second electrode; the first electrode is an FTO-TiO2 thin film, and the second electrode is a conductive and non-corrosive electrode.

[0009] The present invention also provides a method for preparing a power generation device based on TiO2 thin film absorbing water, comprising the following steps:

[0010] Step S1, preparing a power generation component;

[0011] Step S11, preparing the first electrode of the power generation component;

[0012] Step S12, preparing the second electrode of the power generation component;

[0013] Step S2: assembling a power generation device based on TiO2 thin film absorbing moisture.

[0014] Preferably, step S11 is specifically as follows:

[0015] ①. Clean the FTO glass with deionized water, anhydrous ethanol, and acetone in sequence. After cleaning, place it in an oven at 40°C to dry it for later use.

[0016] ② Weigh 2.5g-3.5g of terpineol and dissolve it in 8.0mL-9.0mL of anhydrous ethanol. Stir continuously for 5 minutes to obtain mixture A.

[0017] Weigh 0.5g to 1.5g of TiO2 nanoparticles and add them to mixture A. After the two are completely dissolved, mix them and mix them evenly to obtain mixture B.

[0018] Add 0.3g-0.4g of ethyl cellulose to mixture B and stir for 3-4 days until the rotor in the solution becomes sticky and stops turning, thus obtaining TiO2 nano-slurry.

[0019] ③, the TiO2 nano slurry is evenly spin-coated on the thin surface of the FTO glass dried in step ① by a spin coater to obtain a TiO2 thin film;

[0020] After the spin-coated TiO2 film is dried and hardened, it is annealed in a muffle furnace at a temperature of 350°C to 500°C to obtain a hydrophilic FTO-TiO2 film, which is the first electrode of the power generation component.

[0021] Preferably, step S12 is specifically as follows:

[0022] ①. Lay the diaphragm flat on the TiO2 film in the FTO-TiO2 film. The diaphragm is a flat film material that can pass water vapor but is not conductive, including but not limited to paper, filter paper, toilet paper, A4 paper, and permeable fabric.

[0023] ② Lay the conductive and non-corrosion-resistant electrode flat on the top of the diaphragm to form the second electrode of the power generation component;

[0024] Conductive and non-corrosive electrodes include, but are not limited to, copper mesh, carbon cloth, gold sheet, silver sheet, and platinum sheet.

[0025] Preferably, step S2 is specifically as follows: connecting the FTO glass and a conductive and non-corrosive electrode with a wire, breathing water vapor or dripping an aqueous solution or a water-based ion solution on the surface of the TiO2 film through a straw, detecting the current and voltage outputs, and obtaining a power generation device based on the TiO2 film absorbing water.

[0026] The present invention also provides an application of a TiO2 thin film-based water absorption power generation device in a scenario where there is no light and no need for external mechanical energy injection.

[0027] The present invention adopts the above-mentioned TiO2 thin film water absorption power generation device and its preparation method and application, and the beneficial effects are as follows:

[0028] (1) The raw materials used in preparing the FTO-TiO2 film of the present invention include FTO, a renewable material, and TiO2, a common metal oxide widely distributed in the Earth's crust. It is non-toxic, harmless, and environmentally friendly, and poses no threat to human health or the environment. The prepared FTO-TiO2 film has a strong hydrophilic property and can be used to absorb water molecules from the air and also serve as the first electrode of a power generation component.

[0029] (2) The FTO-TiO2 film prepared by the present invention has a stronger hydrophilicity in adsorbing water droplets than carbon materials. TiO2 nanoparticles have high surface energy and hydrophilicity, and can therefore effectively adsorb water molecules. The oxide groups on their surface can form hydrogen bonds or other interaction forces with water molecules, thereby increasing the adsorption force between the TiO2 nanoparticles and water molecules, which makes the TiO2 nanoparticles tend to adsorb water molecules to a certain extent;

[0030] In addition, the TiO2 film absorbs environmental moisture, and the hydroxide ions on its surface are adsorbed and form hydrogen bonds with water molecules, which causes charge separation and charge transfer, forming a region with negative charge. This makes the surface of the TiO2 nanoparticles charged, and under the action of the diaphragm and the copper mesh electrode, the first electrode and the second electrode form a conductive path to conduct electrical energy.

[0031] (3) The power generation device prepared by the present invention can continuously and effectively utilize the interaction between aqueous solution or water vapor or aqueous ion solution and TiO2 nanoparticles to output electrical energy. It is particularly suitable for specific scenarios where there is no light and no external force injection such as mechanical energy is required. It can effectively solve the limitations of existing technologies in generating electricity under specific conditions, and has brought new breakthroughs to the field of green energy.

[0032] (4) The hydropower generation system of the FTO-TiO2 film, diaphragm and conductive, non-corrosive electrodes prepared by the present invention does not produce any harmful substances during the hydropower generation process and does not cause pollution to the environment.

[0033] (5) The materials such as the FTO-TiO2 film, diaphragm and Cu mesh in the present invention are relatively cheap and the preparation process is relatively simple, which can reduce the cost of hydropower generation equipment.

[0034] (6) The FTO-TiO2 film, diaphragm and Cu mesh prepared in the present invention serve as core components of a water power generation system. They can generate electricity using pure water, sewage and seawater, and can be used for a long time.

[0035] FTO is a conductive oxide material with good chemical stability and is not easily oxidized or corroded; TiO2 has good chemical and electrochemical stability and hardly undergoes chemical reactions or dissolution; copper mesh usually has a long service life and can maintain good conductive properties for a long time.

[0036] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a flow chart of a TiO2 thin film water absorption power generation device and its preparation method and application embodiment of the present invention;

[0038] Figure 2 This is a graph showing the voltage output results of a power generation device based on TiO2 thin film absorbing moisture, its preparation method, and application examples of the present invention;

[0039] Figure 3 This is a diagram showing the current output results of a power generation device based on TiO2 thin film absorbing moisture, its preparation method, and an application example of the present invention. DETAILED DESCRIPTION

[0040] The technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.

[0041] Unless otherwise defined, technical or scientific terms used in the present invention shall have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs.

[0042] Example

[0043] like Figure 1 As shown, a method for preparing a power generation device based on TiO2 thin film absorbing water includes the following steps:

[0044] Step S1: preparing a power generation component.

[0045] Step S11: preparing the first electrode of the power generation component.

[0046] ①. Clean the FTO glass with a size of 4cm*4cm*4cm with deionized water, anhydrous ethanol, and acetone in ultrasonic cleaning in sequence. After cleaning, place it in an oven at a temperature of 40°C for drying.

[0047] ② Weigh 3.245 g of terpineol and dissolve it in 8.5 mL of anhydrous ethanol. Stir continuously for 5 minutes to obtain mixture A.

[0048] Weigh 0.8 g of TiO2 nanoparticles and add them to mixture A. After both are completely dissolved, mix them and mix them evenly to obtain mixture B.

[0049] Add 0.4 g of ethyl cellulose to mixture B and stir the mixture for 4 days until the rotor in the solution becomes sticky and stops turning, thereby obtaining TiO2 nano-slurry.

[0050] ③. Use a spin coater to evenly spin-coat the TiO2 nano-slurry on the thin surface of the FTO glass dried in step ① to obtain a TiO2 thin film.

[0051] After the spin-coated TiO2 film is dried and hardened, it is annealed in a muffle furnace at a temperature of 350°C to obtain a hydrophilic FTO-TiO2 film, which is the first electrode of the power generation component.

[0052] Step S12: preparing the second electrode of the power generation component.

[0053] ①. Lay the filter paper flat on top of the TiO2 film in the FTO-TiO2 film.

[0054] ②. Lay the copper mesh flat on top of the filter paper to form the second electrode of the power generation component.

[0055] Step S2: assembling a power generation device based on TiO2 thin film absorbing moisture.

[0056] By connecting the FTO glass and copper mesh with a wire, dripping aqueous solution on the surface of the TiO2 film, and detecting the current and voltage output, a power generation device based on the TiO2 film absorbing water was obtained.

[0057] The performance of the power generation device based on TiO2 thin film absorbing water prepared in this example was tested:

[0058] The KEITHLEY 2400 SourceMeter digital source meter was used to directly connect the first electrode and the second electrode of the power generation device to measure the current and voltage output of the prepared power generation device based on TiO2 film absorbing water. The results are as follows: Figure 2-Figure 3 shown.

[0059] Therefore, the present invention adopts the above-mentioned TiO2 thin film-based water absorption power generation device and its preparation method and application. The prepared power generation device generates electricity under low water content conditions. Different from the traditional water evaporation power generation device structure, the power generation device adopts a sandwich device power generation structure, which has the characteristics of simplicity, strong reliability, and rapid power generation.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the same. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solutions of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A power generation device based on TiO2 thin film absorbing water, characterized by: It includes a power generation component and an aqueous solution or water vapor or an aqueous ion solution. The power generation component includes a first electrode, a diaphragm, and a second electrode. The first electrode is an FTO-TiO2 film, and the second electrode is a conductive and non-corrosive electrode.

2. A method for preparing a power generation device based on TiO2 thin film absorbing water according to claim 1, characterized in that: The following steps are involved: Step S1, preparing a power generation component; Step S11, preparing the first electrode of the power generation component; Step S12, preparing the second electrode of the power generation component; Step S2: assembling a power generation device based on TiO2 thin film absorbing moisture.

3. The method for preparing a power generation device based on TiO2 thin film absorbing water according to claim 2, characterized in that: Step S11 is specifically as follows: ①. Clean the FTO glass with deionized water, anhydrous ethanol, and acetone in sequence. After cleaning, place it in an oven at 40°C to dry it for later use. ② Weigh 2.5g-3.5g of terpineol and dissolve it in 8.0mL-9.0mL of anhydrous ethanol. Stir continuously for 5 minutes to obtain mixture A. Weigh 0.5g to 1.5g of TiO2 nanoparticles and add them to mixture A. After the two are completely dissolved, mix them and mix them evenly to obtain mixture B. Add 0.3g-0.4g of ethyl cellulose to mixture B and stir for 3-4 days until the rotor in the solution becomes sticky and stops turning, thus obtaining TiO2 nano-slurry. ③, the TiO2 nano slurry is evenly spin-coated on the thin surface of the FTO glass dried in step ① by a spin coater to obtain a TiO2 thin film; After the spin-coated TiO2 film is dried and hardened, it is annealed in a muffle furnace at a temperature of 350°C to 500°C to obtain a hydrophilic FTO-TiO2 film, which is the first electrode of the power generation component.

4. The method for preparing a power generation device based on TiO2 thin film absorbing water according to claim 3, characterized in that: Step S12 is specifically as follows: ①. Lay the diaphragm flat on the TiO2 film in the FTO-TiO2 film. The diaphragm is a flat film material that can pass water vapor but is not conductive, including but not limited to paper, filter paper, toilet paper, A4 paper, and permeable fabric. ② Lay the conductive and non-corrosion-resistant electrode flat on the top of the diaphragm to form the second electrode of the power generation component; Conductive and non-corrosive electrodes include, but are not limited to, copper mesh, carbon cloth, gold sheet, silver sheet, and platinum sheet.

5. The method for preparing a power generation device based on TiO2 thin film absorbing water according to claim 4, characterized in that: Step S2 is specifically as follows: connect the FTO glass and a conductive and non-corrosive electrode with a wire, exhale water vapor or drip an aqueous solution or a water-based ion solution on the surface of the TiO2 film through a straw, detect the current and voltage output, and obtain a power generation device based on the TiO2 film absorbing water.

6. An application of the TiO2 thin film water absorption power generation device as claimed in claim 1 in a scenario where there is no light and no need for external mechanical energy injection.

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