Oxygen light same frequency nano composite type negative oxygen ion liquid and preparation method thereof

Abstract

This invention relates to the field of air purification technology and discloses an oxygen-photonic co-frequency nanocomposite negative oxygen ion liquid and its preparation method. The method includes the following steps: preparation of nano precursors, preparation of photocatalytic composite dispersion, functionalization of negative ion release body, photocuring and stabilization, liquid phase activation and finished product formulation. Based on core-shell structured oxygen photosensitive nanomaterials, a photocatalytic component system is constructed by combining bismuth-based photocatalysts and nano-carbon quantum dots, which enhances the separation and utilization efficiency of photogenerated electron-hole pairs, improves the photoresponse performance and negative oxygen ion release concentration of the product, and forms a functionalized prepolymer slurry by mixing functional mineral components with acrylate functional monomers and photoinitiators, and then photocuring and crosslinking it with the photocatalytic composite dispersion to form a three-dimensional network gel structure, which slows down the deactivation and loss of active components, thereby ensuring the long-term effectiveness and stability of negative oxygen ion release performance.

Description

Technical Field

[0001] This invention relates to the field of air purification technology, specifically to an oxygen-light co-frequency nanocomposite negative oxygen ion liquid and its preparation method. Background Technology

[0002] With the improvement of living standards, indoor air pollution has received increasing attention. Negative oxygen ions are oxygen molecules with a negative charge that can effectively neutralize harmful substances in the air, such as volatile organic compounds like formaldehyde and benzene, as well as microorganisms like bacteria and viruses. The concentration of negative ions in the air is one of the indicators of air quality.

[0003] Currently, negative ion generation technology is widely researched and applied in the field of indoor air purification and healthy environment construction. However, existing technical solutions generally have bottlenecks. Most negative ion generating materials rely on the static spontaneous radiation of a single mineral or the principle of high-voltage corona discharge. Their negative ion release concentration is limited and decays rapidly, making it difficult to maintain an effective purification concentration in open spaces. Especially when there is no continuous input of external energy, their performance deteriorates, failing to meet the needs for long-term and stable air quality improvement.

[0004] Therefore, a nanocomposite negative oxygen ion liquid with oxygen-light co-frequency and its preparation method are proposed to solve the above problems. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an oxygen-light co-frequency nanocomposite negative oxygen ion liquid and its preparation method, which solves the problems mentioned in the background technology, namely, the limited release concentration of negative oxygen ions and their rapid decay, which cannot meet the requirements for long-term and stable air quality improvement.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an oxygen-light co-frequency nanocomposite negative oxygen ion liquid and its preparation method, the method comprising the following steps: Step 1: Preparation of nano precursors. Using silane coupling agent modified titanium dioxide nanoparticles as crystal nuclei, oxygen vacancy type zinc oxide nanorods co-doped with gadolinium, cerium and lanthanum are grown in situ in rare earth salt aqueous solution by hydrothermal method to obtain core-shell structured oxygen photosensitized nanomaterials. Step 2: Preparation of photocatalytic composite dispersion. The oxygen photosensitizing nanomaterials, bismuth-based photocatalysts, and nano-carbon quantum dots prepared in Step 1 are mixed with organosilicon dispersion medium and dispersed under ultrasonic and high-speed shearing to obtain a primary dispersion. Step 3: Functionalization of negative ion releasers. Natural tourmaline powder, far-infrared ceramic powder, and nano-montmorillonite with quaternary ammonium salt groups grafted on the surface are mixed and stirred with acrylate functional monomers containing unsaturated double bonds and photoinitiators under light-protected conditions to obtain functionalized prepolymer slurry. Step 4: Photocuring and stabilization. The primary dispersion obtained in Step 2 is mixed with the functionalized prepolymer slurry obtained in Step 3. Under the protection of an inert gas, it is irradiated and cured with ultraviolet light of a specific wavelength to initiate a cross-linking reaction. After curing, it is subjected to aging treatment to obtain a gel intermediate. Step 5: Liquid phase activation and finished product preparation. The gel intermediate obtained in Step 4, deionized water, polyol moisturizer, and stabilizer system containing superoxide dismutase mimic and antioxidant amino acids are mixed and hydrated under constant temperature and low speed stirring conditions. Finally, the pH value is adjusted to obtain the oxygen-light co-frequency nanocomposite negative oxygen ion liquid.

[0007] Preferably, in step one, the preparation method of the silane coupling agent modified titanium dioxide nanoparticles is as follows: anatase titanium dioxide nanoparticles with a particle size of 10-30 nm are dispersed in anhydrous ethanol, 1-3% of the silane coupling agent KH-570 is added, and the mixture is refluxed at 60-80°C for 2-4 hours. After the reaction is completed, the mixture is centrifuged, washed with ethanol, and vacuum dried at 50-70°C to obtain titanium dioxide nanoparticles with olefin groups modified on the surface; the rare earth salt aqueous solution is a mixed aqueous solution of gadolinium nitrate, cerium nitrate, and lanthanum nitrate, wherein the molar concentration ratio of gadolinium ions, cerium ions, and lanthanum ions is 1:0.5-1.5:0.2-0.8.

[0008] Preferably, in step one, the hydrothermal method specifically involves: dispersing the modified titanium dioxide nanoparticles in deionized water, adding urea as a mineralizing agent, then adding the gadolinium-cerium-lanthanum rare earth ion mixed salt solution dropwise, adjusting the pH to 8-10 with ammonia, transferring the solution to a high-pressure reactor lined with polytetrafluoroethylene, reacting at 120-180°C for 6-18 hours, allowing it to cool naturally after the reaction, centrifuging, washing, and drying the product, and then calcining it in air at 400-500°C for 2-4 hours to obtain the oxygen photosensitized nanomaterial, which has a spiky spherical structure with titanium dioxide as the core and doped zinc oxide nanorods as the shell. The length of the zinc oxide nanorods is 100-300 nm, and the diameter is 20-50 nm.

[0009] Preferably, in step two, the primary dispersion is made from the following raw materials by weight: 5-15 parts of oxygen photosensitizing nanomaterials, 3-8 parts of bismuth-based photocatalysts, 1-4 parts of carbon nanoparticles, and 70-90 parts of organosilicon dispersion medium. The bismuth-based photocatalyst is at least one of bismuth oxyhalide or bismuth vanadate, with a particle size of 50-200 nm. The carbon nanoparticles have a particle size of less than 10 nm and are rich in carboxyl and amino functional groups on their surface. The organosilicon dispersion medium is one of vinyl-terminated polydimethylsiloxane or amino-terminated polydimethylsiloxane. The dispersion process is carried out in a high-speed shear disperser at a speed of 8000-15000 rpm for 30-60 minutes, supplemented by ultrasonic treatment with a power of 300-600W. The ultrasonic working mode is intermittent, specifically with a 2-second working interval followed by a 1-second interval.

[0010] Preferably, the nano-carbon quantum dots are prepared by the following method: weigh citric acid and urea, mix them in a molar ratio of 1:2-4, add an appropriate amount of deionized water to dissolve them, transfer them to a microwave reactor or high-pressure reactor, react them at 160-200℃ for 2-4 hours, and after the reaction solution is cooled, it is purified by dialysis and freeze-dried to obtain the nano-carbon quantum dots with a surface rich in carboxyl and amino groups.

[0011] Preferably, in step three, the functionalized prepolymer slurry is made from the following raw materials by weight: 10-20 parts of natural tourmaline powder, 5-12 parts of far-infrared ceramic powder, 3-8 parts of nano-montmorillonite with surface-grafted quaternary ammonium salt, 15-30 parts of acrylate functional monomer, and 1-3 parts of photoinitiator. The acrylate functional monomer is selected from at least two of hydroxyethyl methacrylate, pentaerythritol triacrylate, and dipentaerythritol pentaacrylate. The photoinitiator is 2-hydroxy-2-methyl-1-phenyl-1-propanone or 1-hydroxycyclohexylphenyl ketone. The mixing and stirring are carried out in a light-proof reactor at a stirring speed of 200-400 rpm for 2-5 hours, and the temperature is controlled at 25-35℃.

[0012] Preferably, the preparation method of the nano-montmorillonite grafted with quaternary ammonium salt is as follows: sodium-based montmorillonite is dispersed in deionized water to form a 1-3 wt% suspension, heated to 60-80°C, and cetyltrimethylammonium bromide is added in a molar amount equivalent to 1.2-1.5 times the cation exchange capacity of montmorillonite. The mixture is stirred at a constant temperature for 6-12 hours. After the reaction is completed, the mixture is centrifuged and washed repeatedly with deionized water and ethanol until no bromide ions are detected. Finally, the mixture is vacuum dried at 50-70°C and ground through a 200-600 mesh sieve.

[0013] Preferably, in step four, the mixing process is as follows: all the primary dispersions obtained in step two and all the functionalized prepolymer slurries obtained in step three are added to a transparent reactor equipped with a stirrer and an inert gas inlet and outlet. Under the protection of continuous nitrogen or argon gas, the mixture is stirred and mixed at a speed of 100-300 rpm for 1-2 hours. The wavelength of the ultraviolet light irradiation curing is 365 nm, the irradiation intensity is 20-50 mW / cm², the irradiation time is 10-30 minutes, and the irradiation distance is 10-20 cm. The curing conditions are as follows: the photocured product is placed in a constant temperature environment of 40-60℃ and allowed to stand for 24-72 hours to obtain a translucent to milky white gel intermediate.

[0014] Preferably, in step five, the specific steps of liquid phase activation and finished product preparation are as follows: the gel intermediate obtained in step four is broken into particles smaller than 5 mm, and added to a jacketed stirred tank with deionized water, polyol humectant, and stabilizer system in a weight ratio of 20-40:50-70:5-10:1-3. The polyol humectant is at least one of glycerol, propylene glycol, and sorbitol. The stabilizer system consists of superoxide dismutase mimic, glutathione, and L-arginine in a mass ratio of 1:1:0.5. Under constant temperature of 25-35℃ and stirring speed of 50-150 rpm, the mixture is slowly stirred and activated for 12-24 hours until the gel particles are completely hydrated and dispersed. Finally, the pH value of the system is adjusted to 6.0-7.5 with food-grade citric acid or sodium bicarbonate dilute solution to obtain the oxygen-light co-frequency nanocomposite negative oxygen ion liquid.

[0015] Preferably, the negative oxygen ion liquid comprises, by weight, 5-15 parts of a photocatalytic component mainly composed of core-shell structured oxygen photosensitizing nanomaterials, 18-40 parts of a functional mineral component composed of natural tourmaline powder, nano far-infrared ceramic powder and organic nano montmorillonite, 85-120 parts of a carrier component composed of a polymer formed by photocuring and cross-linking of acrylate functional monomers and an organosilicon dispersion medium, 50-70 parts of deionized water, 5-10 parts of polyol humectant, and 1-3 parts of composite stabilizer.

[0016] Compared with the prior art, the present invention provides an oxygen-photonic co-frequency nanocomposite negative oxygen ion liquid and its preparation method, which has the following beneficial effects: 1. In this invention, a photocatalytic component system is constructed by combining a bismuth-based photocatalyst with nano-carbon quantum dots on a core-shell structured oxygen photosensitizing nanomaterial. Under illumination, this multi-component nanomaterial system can produce a synergistic effect, enhancing the separation and utilization efficiency of photogenerated electron-hole pairs, thereby achieving continuous production of negative oxygen ions under light excitation and improving the product's photosensitivity and negative oxygen ion release concentration.

[0017] 2. In this invention, a functionalized prepolymer slurry is formed by mixing functional mineral components with acrylate functional monomers and photoinitiators, and then photocuring and crosslinking it with a photocatalytic composite dispersion to form a three-dimensional network gel structure. This structure can encapsulate and fix the photocatalytic components and functional mineral components in a polymer-organosilicon carrier network, slowing down the deactivation and loss of active components, thereby ensuring the long-term effectiveness and stability of negative oxygen ion release performance.

[0018] 3. In this invention, through liquid-phase activation and finished product formulation processes, the photocured gel intermediate is hydrated at low speed and constant temperature in an aqueous environment with a polyol humectant and a composite stabilizer system. This process promotes uniform swelling and dispersion of the gel network, while the stabilizer system protects the active ingredients and maintains the acid-base balance of the system, avoiding stratification and precipitation during storage and use, and ensuring the uniformity and dispersion stability of the product performance. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. 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 of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0020] Example 1: An oxygen-light co-frequency nanocomposite negative oxygen ion liquid and its preparation method, the method comprising the following steps: Step 1: Preparation of nano precursors. Using silane coupling agent modified titanium dioxide nanoparticles as crystal nuclei, oxygen vacancy type zinc oxide nanorods co-doped with gadolinium, cerium and lanthanum are grown in situ in rare earth salt aqueous solution by hydrothermal method to obtain core-shell structured oxygen photosensitized nanomaterials. Step 2: Preparation of photocatalytic composite dispersion. The oxygen photosensitizing nanomaterials, bismuth-based photocatalysts, and nano-carbon quantum dots prepared in Step 1 are mixed with organosilicon dispersion medium and dispersed under ultrasonic and high-speed shearing to obtain a primary dispersion. Step 3: Functionalization of negative ion releasers. Natural tourmaline powder, far-infrared ceramic powder, and nano-montmorillonite with quaternary ammonium salt groups grafted on the surface are mixed and stirred with acrylate functional monomers containing unsaturated double bonds and photoinitiators under light-protected conditions to obtain functionalized prepolymer slurry. Step 4: Photocuring and stabilization. The primary dispersion obtained in Step 2 is mixed with the functionalized prepolymer slurry obtained in Step 3. Under the protection of an inert gas, it is irradiated and cured with ultraviolet light of a specific wavelength to initiate a cross-linking reaction. After curing, it is subjected to aging treatment to obtain a gel intermediate. Step 5: Liquid phase activation and finished product preparation. The gel intermediate obtained in Step 4, deionized water, polyol moisturizer, and stabilizer system containing superoxide dismutase mimic and antioxidant amino acids are mixed and hydrated under constant temperature and low speed stirring conditions. Finally, the pH value is adjusted to obtain oxygen-light co-frequency nanocomposite negative oxygen ion liquid.

[0021] In step one, the preparation method of silane coupling agent modified titanium dioxide nanoparticles is as follows: anatase titanium dioxide nanoparticles with a particle size of 10 nm are dispersed in anhydrous ethanol, and silane coupling agent KH-570 accounting for 1% of the mass of titanium dioxide is added. The mixture is refluxed at 60 °C for 2 hours. After the reaction is completed, the nanoparticles are centrifuged, washed with ethanol, and vacuum dried at 50 °C to obtain titanium dioxide nanoparticles with olefin groups modified on the surface. The rare earth salt aqueous solution is a mixed aqueous solution of gadolinium nitrate, cerium nitrate, and lanthanum nitrate, wherein the molar concentration ratio of gadolinium ions, cerium ions, and lanthanum ions is 1:0.5:0.2.

[0022] In step one, the hydrothermal method is as follows: the modified titanium dioxide nanoparticles are dispersed in deionized water, urea is added as a mineralizing agent, and then a mixed salt solution of gadolinium-cerium-lanthanum rare earth ions is added dropwise. The pH is adjusted to 8 with ammonia water, and the mixture is transferred to a high-pressure reactor lined with polytetrafluoroethylene. The reaction is carried out at 120°C for 6 hours. After the reaction is completed, the mixture is naturally cooled. The product is centrifuged, washed, and dried, and then calcined in air at 400°C for 2 hours to obtain oxygen photosensitized nanomaterials. The morphology is a spiky spherical structure with titanium dioxide as the core and doped zinc oxide nanorods as the shell. The length of the zinc oxide nanorods is 100 nm and the diameter is 20 nm.

[0023] In step two, the primary dispersion is made from the following raw materials by weight: 5 parts of oxygen photosensitizing nanomaterials, 3 parts of bismuth-based photocatalyst, 1 part of carbon nanoparticles, and 70 parts of organosilicon dispersion medium. The bismuth-based photocatalyst is bismuth halide with a particle size of 50 nm. The carbon nanoparticles have a particle size of less than 10 nm and are rich in carboxyl and amino functional groups on their surface. The organosilicon dispersion medium is vinyl-terminated polydimethylsiloxane. The dispersion process is carried out in a high-speed shear disperser at a speed of 8000 rpm for 30 minutes, while being supplemented by ultrasonic treatment with a power of 300W. The ultrasonic working mode is intermittent, specifically with a 2-second working interval followed by a 1-second interval.

[0024] The nano-carbon quantum dots were prepared by the following method: citric acid and urea were weighed, mixed in a molar ratio of 1:2, dissolved in an appropriate amount of deionized water, transferred to a microwave reactor, and reacted at 160°C for 2 hours. After the reaction solution was cooled, it was purified by dialysis and freeze-dried to obtain nano-carbon quantum dots with a surface rich in carboxyl and amino groups.

[0025] In step three, the functionalized prepolymer slurry is made from the following raw materials by weight: 10 parts natural tourmaline powder, 5 parts far-infrared ceramic powder, 3 parts nano-montmorillonite with surface grafted quaternary ammonium salt, 15 parts acrylate functional monomer, and 1 part photoinitiator. The acrylate functional monomer is a mixture of hydroxyethyl methacrylate and pentaerythritol triacrylate, and the photoinitiator is 2-hydroxy-2-methyl-1-phenyl-1-propanone. The mixing and stirring are carried out in a light-proof reactor at a stirring speed of 200 rpm for 2 hours, and the temperature is controlled at 25°C.

[0026] The preparation method of nano-montmorillonite grafted with quaternary ammonium salt is as follows: sodium-based montmorillonite is dispersed in deionized water to form a 1 wt% suspension, heated to 60°C, and cetyltrimethylammonium bromide is added in a molar amount equivalent to 1.2 times the cation exchange capacity of montmorillonite. The mixture is stirred at a constant temperature for 6 hours. After the reaction is completed, the mixture is centrifuged and washed repeatedly with deionized water and ethanol until no bromide ions are detected. Finally, it is vacuum dried at 50°C and ground through a 200-mesh sieve.

[0027] In step four, the mixing process is as follows: all the primary dispersions obtained in step two and all the functionalized prepolymer slurries obtained in step three are added to a transparent reactor equipped with a stirrer and an inert gas inlet and outlet. Under continuous nitrogen protection, the mixture is stirred and mixed at 100 rpm for 1 hour. The wavelength of ultraviolet irradiation curing is 365 nm, the irradiation intensity is 20 mW / cm², the irradiation time is 10 minutes, and the irradiation distance is 10 cm. The curing conditions are as follows: the photocured product is placed in a constant temperature environment of 40°C and allowed to stand for 24 hours to cure, resulting in a translucent to milky white gel intermediate.

[0028] In step five, the specific steps for liquid phase activation and finished product preparation are as follows: The gel intermediate obtained in step four is broken into particles smaller than 5 mm, and added to a jacketed stirred tank with deionized water, polyol humectant, and stabilizer system in a weight ratio of 20:50:5:1. The polyol humectant is glycerol, and the stabilizer system consists of superoxide dismutase mimic, glutathione, and L-arginine in a mass ratio of 1:1:0.5. Under constant temperature of 25°C and stirring speed of 50 rpm, the mixture is slowly stirred and activated for 12 hours until the gel particles are completely hydrated and dispersed. Finally, the pH value of the system is adjusted to 6.0 with food-grade citric acid solution to obtain the oxygen-light co-frequency nanocomposite negative oxygen ion liquid.

[0029] The negative oxygen ion liquid, by weight, comprises: 5 parts of photocatalytic component mainly composed of core-shell structured oxygen photosensitizing nanomaterials; 18 parts of functional mineral component composed of natural tourmaline powder, nano far-infrared ceramic powder and organic nano montmorillonite; 85 parts of carrier component composed of polymer formed by photocuring and cross-linking of acrylate functional monomers and organosilicon dispersion medium; 50 parts of deionized water; 5 parts of polyol moisturizer; and 1 part of composite stabilizer.

[0030] Example 2: An oxygen-light co-frequency nanocomposite negative oxygen ion liquid and its preparation method, the method comprising the following steps: Step 1: Preparation of nano precursors. Using silane coupling agent modified titanium dioxide nanoparticles as crystal nuclei, oxygen vacancy type zinc oxide nanorods co-doped with gadolinium, cerium and lanthanum are grown in situ in rare earth salt aqueous solution by hydrothermal method to obtain core-shell structured oxygen photosensitized nanomaterials. Step 2: Preparation of photocatalytic composite dispersion. The oxygen photosensitizing nanomaterials, bismuth-based photocatalysts, and nano-carbon quantum dots prepared in Step 1 are mixed with organosilicon dispersion medium and dispersed under ultrasonic and high-speed shearing to obtain a primary dispersion. Step 3: Functionalization of negative ion releasers. Natural tourmaline powder, far-infrared ceramic powder, and nano-montmorillonite with quaternary ammonium salt groups grafted on the surface are mixed and stirred with acrylate functional monomers containing unsaturated double bonds and photoinitiators under light-protected conditions to obtain functionalized prepolymer slurry. Step 4: Photocuring and stabilization. The primary dispersion obtained in Step 2 is mixed with the functionalized prepolymer slurry obtained in Step 3. Under the protection of an inert gas, it is irradiated and cured with ultraviolet light of a specific wavelength to initiate a cross-linking reaction. After curing, it is subjected to aging treatment to obtain a gel intermediate. Step 5: Liquid phase activation and finished product preparation. The gel intermediate obtained in Step 4, deionized water, polyol moisturizer, and stabilizer system containing superoxide dismutase mimic and antioxidant amino acids are mixed and hydrated under constant temperature and low speed stirring conditions. Finally, the pH value is adjusted to obtain oxygen-light co-frequency nanocomposite negative oxygen ion liquid.

[0031] In step one, the preparation method of silane coupling agent modified titanium dioxide nanoparticles is as follows: anatase titanium dioxide nanoparticles with a particle size of 20 nm are dispersed in anhydrous ethanol, and silane coupling agent KH-570 accounting for 2% of the mass of titanium dioxide is added. The mixture is refluxed at 70 °C for 3 hours. After the reaction is completed, the nanoparticles are centrifuged, washed with ethanol, and vacuum dried at 60 °C to obtain titanium dioxide nanoparticles with olefin groups modified on the surface. The rare earth salt aqueous solution is a mixed aqueous solution of gadolinium nitrate, cerium nitrate, and lanthanum nitrate, wherein the molar concentration ratio of gadolinium ions, cerium ions, and lanthanum ions is 1:1:0.5.

[0032] In step one, the hydrothermal method is as follows: the modified titanium dioxide nanoparticles are dispersed in deionized water, urea is added as a mineralizing agent, and then a mixed salt solution of gadolinium-cerium-lanthanum rare earth ions is added dropwise. The pH is adjusted to 9 with ammonia water, and the mixture is transferred to a high-pressure reactor lined with polytetrafluoroethylene. The reaction is carried out at 150°C for 12 hours. After the reaction is completed, the mixture is naturally cooled. The product is centrifuged, washed, and dried, and then calcined in air at 450°C for 3 hours to obtain oxygen photosensitized nanomaterials. The morphology is a spiky spherical structure with titanium dioxide as the core and doped zinc oxide nanorods as the shell. The length of the zinc oxide nanorods is 200 nm and the diameter is 35 nm.

[0033] In step two, the primary dispersion is made from the following raw materials by weight: 10 parts of oxygen photosensitizing nanomaterials, 5 parts of bismuth-based photocatalyst, 3 parts of carbon nanoparticles, and 80 parts of organosilicon dispersion medium. The bismuth-based photocatalyst is bismuth halide with a particle size of 100 nm. The carbon nanoparticles have a particle size of less than 10 nm and are rich in carboxyl and amino functional groups on their surface. The organosilicon dispersion medium is vinyl-terminated polydimethylsiloxane. The dispersion process is carried out in a high-speed shear disperser at a speed of 12,000 rpm for 45 minutes, and is supplemented by ultrasonic treatment with a power of 500 W. The ultrasonic working mode is intermittent, specifically with a 2-second working interval followed by a 1-second interval.

[0034] The nano-carbon quantum dots were prepared by the following method: citric acid and urea were weighed, mixed in a molar ratio of 1:3, dissolved in an appropriate amount of deionized water, transferred to a microwave reactor, and reacted at 180°C for 3 hours. After the reaction solution was cooled, it was purified by dialysis and freeze-dried to obtain nano-carbon quantum dots with a surface rich in carboxyl and amino groups.

[0035] In step three, the functionalized prepolymer slurry is made from the following raw materials by weight: 15 parts natural tourmaline powder, 10 parts far-infrared ceramic powder, 5 parts nano-montmorillonite with surface grafted quaternary ammonium salt, 20 parts acrylate functional monomer, and 2 parts photoinitiator. The acrylate functional monomer is a mixture of hydroxyethyl methacrylate and pentaerythritol triacrylate, and the photoinitiator is 2-hydroxy-2-methyl-1-phenyl-1-propanone. The mixing and stirring are carried out in a light-proof reactor at a stirring speed of 300 rpm for 4 hours, and the temperature is controlled at 30℃.

[0036] The preparation method of nano-montmorillonite grafted with quaternary ammonium salt is as follows: sodium-based montmorillonite is dispersed in deionized water to form a 5 wt% suspension, heated to 70°C, and cetyltrimethylammonium bromide is added in a molar amount equivalent to 1.3 times the cation exchange capacity of montmorillonite. The mixture is stirred at a constant temperature for 8 hours. After the reaction is completed, the mixture is centrifuged and washed repeatedly with deionized water and ethanol until no bromide ions are detected. Finally, it is vacuum dried at 60°C and ground through a 400-mesh sieve.

[0037] In step four, the mixing process is as follows: all the primary dispersions obtained in step two and all the functionalized prepolymer slurries obtained in step three are added to a transparent reactor equipped with a stirrer and an inert gas inlet and outlet. Under continuous nitrogen protection, the mixture is stirred and mixed at a speed of 200 rpm for 1.5 hours. The wavelength of ultraviolet irradiation curing is 365 nm, the irradiation intensity is 40 mW / cm², the irradiation time is 20 minutes, and the irradiation distance is 15 cm. The curing conditions are as follows: the photocured product is placed in a constant temperature environment of 50°C and allowed to stand for 36 hours to cure, resulting in a translucent to milky white gel intermediate.

[0038] In step five, the specific steps for liquid phase activation and finished product preparation are as follows: The gel intermediate obtained in step four is broken into particles smaller than 5 mm, and added to a jacketed stirred tank with deionized water, polyol humectant, and stabilizer system in a weight ratio of 30:60:7:2. The polyol humectant is glycerol, and the stabilizer system consists of superoxide dismutase mimic, glutathione, and L-arginine in a mass ratio of 1:1:0.5. Under constant temperature of 30°C and stirring speed of 100 rpm, the mixture is slowly stirred and activated for 18 hours until the gel particles are completely hydrated and dispersed. Finally, the pH value of the system is adjusted to 7 with food-grade citric acid solution to obtain the oxygen-light co-frequency nanocomposite negative oxygen ion liquid.

[0039] The negative oxygen ion liquid, by weight, comprises: 10 parts of photocatalytic component mainly composed of core-shell structured oxygen photosensitizing nanomaterials; 26 parts of functional mineral component composed of natural tourmaline powder, nano far-infrared ceramic powder and organic nano montmorillonite; 100 parts of carrier component composed of polymer formed by photocuring and cross-linking of acrylate functional monomers and organosilicon dispersion medium; 60 parts of deionized water; 7 parts of polyol moisturizer; and 2 parts of composite stabilizer.

[0040] Example 3: An oxygen-light co-frequency nanocomposite negative oxygen ion liquid and its preparation method, the method comprising the following steps: Step 1: Preparation of nano precursors. Using silane coupling agent modified titanium dioxide nanoparticles as crystal nuclei, oxygen vacancy type zinc oxide nanorods co-doped with gadolinium, cerium and lanthanum are grown in situ in rare earth salt aqueous solution by hydrothermal method to obtain core-shell structured oxygen photosensitized nanomaterials. Step 2: Preparation of photocatalytic composite dispersion. The oxygen photosensitizing nanomaterials, bismuth-based photocatalysts, and nano-carbon quantum dots prepared in Step 1 are mixed with organosilicon dispersion medium and dispersed under ultrasonic and high-speed shearing to obtain a primary dispersion. Step 3: Functionalization of negative ion releasers. Natural tourmaline powder, far-infrared ceramic powder, and nano-montmorillonite with quaternary ammonium salt groups grafted on the surface are mixed and stirred with acrylate functional monomers containing unsaturated double bonds and photoinitiators under light-protected conditions to obtain functionalized prepolymer slurry. Step 4: Photocuring and stabilization. The primary dispersion obtained in Step 2 is mixed with the functionalized prepolymer slurry obtained in Step 3. Under the protection of an inert gas, it is irradiated and cured with ultraviolet light of a specific wavelength to initiate a cross-linking reaction. After curing, it is subjected to aging treatment to obtain a gel intermediate. Step 5: Liquid phase activation and finished product preparation. The gel intermediate obtained in Step 4, deionized water, polyol moisturizer, and stabilizer system containing superoxide dismutase mimic and antioxidant amino acids are mixed and hydrated under constant temperature and low speed stirring conditions. Finally, the pH value is adjusted to obtain oxygen-light co-frequency nanocomposite negative oxygen ion liquid.

[0041] In step one, the preparation method of silane coupling agent modified titanium dioxide nanoparticles is as follows: 30 nm anatase titanium dioxide nanoparticles are dispersed in anhydrous ethanol, and 3% of the mass of titanium dioxide silane coupling agent KH-570 is added. The mixture is refluxed at 80 °C for 4 hours. After the reaction, the nanoparticles are centrifuged, washed with ethanol, and vacuum dried at 70 °C to obtain titanium dioxide nanoparticles with olefin groups modified on the surface. The rare earth salt aqueous solution is a mixed aqueous solution of gadolinium nitrate, cerium nitrate, and lanthanum nitrate, wherein the molar concentration ratio of gadolinium ions, cerium ions, and lanthanum ions is 1:1.5:0.8.

[0042] In step one, the hydrothermal method is as follows: the modified titanium dioxide nanoparticles are dispersed in deionized water, urea is added as a mineralizing agent, and then a mixed salt solution of gadolinium-cerium-lanthanum rare earth ions is added dropwise. The pH is adjusted to 10 with ammonia water, and the mixture is transferred to a high-pressure reactor lined with polytetrafluoroethylene. The reaction is carried out at 180°C for 18 hours. After the reaction is completed, the mixture is naturally cooled. The product is centrifuged, washed, and dried, and then calcined in air at 500°C for 4 hours to obtain oxygen photosensitized nanomaterials. The morphology is a spiky spherical structure with titanium dioxide as the core and zinc oxide nanorods as the shell. The length of the zinc oxide nanorods is 300 nm and the diameter is 50 nm.

[0043] In step two, the primary dispersion is made from the following raw materials by weight: 15 parts of oxygen photosensitizing nanomaterials, 8 parts of bismuth-based photocatalyst, 4 parts of carbon nanoparticles, and 90 parts of organosilicon dispersion medium. The bismuth-based photocatalyst is bismuth halide with a particle size of 200 nm. The carbon nanoparticles have a particle size of less than 10 nm and are rich in carboxyl and amino functional groups on their surface. The organosilicon dispersion medium is vinyl-terminated polydimethylsiloxane. The dispersion process is carried out in a high-speed shear disperser at a speed of 15,000 rpm for 60 minutes, and is supplemented by ultrasonic treatment with a power of 600 W. The ultrasonic working mode is intermittent, specifically with a 2-second working interval followed by a 1-second interval.

[0044] The nano-carbon quantum dots were prepared by the following method: citric acid and urea were weighed, mixed in a molar ratio of 1:4, dissolved in an appropriate amount of deionized water, transferred to a microwave reactor, and reacted at 200°C for 4 hours. After the reaction solution was cooled, it was purified by dialysis and freeze-dried to obtain nano-carbon quantum dots with a surface rich in carboxyl and amino groups.

[0045] In step three, the functionalized prepolymer slurry is made from the following raw materials by weight: 20 parts natural tourmaline powder, 12 parts far-infrared ceramic powder, 8 parts nano-montmorillonite with surface grafted quaternary ammonium salt, 30 parts acrylate functional monomer, and 3 parts photoinitiator. The acrylate functional monomer is a mixture of hydroxyethyl methacrylate and pentaerythritol triacrylate, and the photoinitiator is 2-hydroxy-2-methyl-1-phenyl-1-propanone. The mixing and stirring are carried out in a light-proof reactor at a stirring speed of 400 rpm for 5 hours, and the temperature is controlled at 35℃.

[0046] The preparation method of nano-montmorillonite grafted with quaternary ammonium salt is as follows: sodium-based montmorillonite is dispersed in deionized water to form a 3wt% suspension, heated to 80℃, and cetyltrimethylammonium bromide is added in a molar amount equivalent to 1.5 times the cation exchange capacity of montmorillonite. The mixture is stirred at a constant temperature for 12 hours. After the reaction is completed, the mixture is centrifuged and washed repeatedly with deionized water and ethanol until no bromide ions are detected. Finally, it is vacuum dried at 70℃ and ground through a 600-mesh sieve.

[0047] In step four, the mixing process is as follows: all the primary dispersions obtained in step two and all the functionalized prepolymer slurries obtained in step three are added to a transparent reactor equipped with a stirrer and an inert gas inlet and outlet. Under continuous nitrogen protection, the mixture is stirred and mixed at 300 rpm for 2 hours. The wavelength of ultraviolet irradiation curing is 365 nm, the irradiation intensity is 50 mW / cm², the irradiation time is 30 minutes, and the irradiation distance is 20 cm. The curing conditions are as follows: the photocured product is placed in a constant temperature environment of 60°C and allowed to stand for 72 hours to cure, resulting in a translucent to milky white gel intermediate.

[0048] In step five, the specific steps for liquid phase activation and finished product preparation are as follows: The gel intermediate obtained in step four is broken into particles smaller than 5 mm, and added to a jacketed stirred tank with deionized water, polyol humectant, and stabilizer system in a weight ratio of 40:70:10:3. The polyol humectant is glycerol, and the stabilizer system consists of superoxide dismutase mimic, glutathione, and L-arginine in a mass ratio of 1:1:0.5. Under constant temperature of 35℃ and stirring speed of 150 rpm, the mixture is slowly stirred and activated for 24 hours until the gel particles are completely hydrated and dispersed. Finally, the pH value of the system is adjusted to 7.5 with food-grade citric acid solution to obtain the oxygen-light co-frequency nanocomposite negative oxygen ion liquid.

[0049] The negative oxygen ion liquid, by weight, comprises: 15 parts of photocatalytic component mainly composed of core-shell structured oxygen photosensitizing nanomaterials; 40 parts of functional mineral component composed of natural tourmaline powder, nano far-infrared ceramic powder and organic nano montmorillonite; 120 parts of carrier component composed of polymer formed by photocuring and cross-linking of acrylate functional monomers and organosilicon dispersion medium; 70 parts of deionized water; 10 parts of polyol moisturizer; and 3 parts of composite stabilizer.

[0050] Comparative Example 1 differs from Example 1 in that rare earth ion doping was not performed during the preparation of the oxygen photosensitized nanomaterials in this comparative example.

[0051] Comparative Example 2 differs from Example 1 in that no nano-carbon quantum dots were added when preparing the primary dispersion in this comparative example.

[0052] Comparative Example 3 differs from Example 1 in that: no nano-montmorillonite with surface-grafted quaternary ammonium salt was added when preparing the functionalized prepolymer slurry in this comparative example.

[0053] Comparative Example 4 differs from Example 1 in that: this comparative example did not undergo ultraviolet irradiation curing treatment in the photocuring and stabilization steps.

[0054] The performance of the oxygen-photonic co-frequency nanocomposite negative oxygen ion liquids prepared in Examples 1-3 and Comparative Examples 1-4 was tested. The test items and test methods are as follows: For the negative oxygen ion release concentration test, in a 1m³ static environment chamber with a temperature of 25±2℃, relative humidity of 50±5% and no active ventilation, 50g of sample was placed in an open petri dish with a diameter of 10cm. A calibrated air negative ion detector was used to continuously monitor the concentration at a distance of 10±1cm directly above the liquid surface. The negative oxygen ion concentration value was recorded after 2 hours, and recorded once per hour. The average value over 24 hours was taken as the final test result. For the photoresponse performance test, under the standard test environment of 25℃ and 50% humidity, the sample was placed in a sealed test chamber with a controllable light source. First, the basic negative oxygen ion release concentration was measured under no light conditions. Then, the sample surface was irradiated with an ultraviolet light source with a wavelength of 365±5nm and a visible light source with a wavelength range of 420-480nm, respectively. After the light source was turned on for 30 minutes, the photoresponse enhancement coefficient was calculated to evaluate the photocatalytic synergistic effect of the material. For stability and durability testing, the samples were sealed and stored in a constant temperature oven at 40±2℃ for accelerated aging. Samples were taken on days 0, 7, and 30 to determine the initial and aged negative oxygen ion release concentrations and calculate the concentration retention rate. Simultaneously, the samples were uniformly coated on the surface of a glass plate to form a thin film and placed in an indoor natural light environment. The negative oxygen ion release concentration was continuously monitored, and the time required for the concentration to decay to 50% of the initial value was recorded as its half-life under actual use conditions. For the dispersion stability test, 50 mL of sample was placed in a 100 mL stoppered graduated cylinder and left to stand at room temperature for 30 ± 1 day. The presence or absence of stratification, precipitation or flocculation was observed and recorded. After standing, the liquid at the top 1 / 10 and bottom 1 / 10 of the graduated cylinder was measured and the concentration of negative oxygen ions was determined. The concentration ratio between the upper and lower layers was calculated to evaluate the uniformity of the distribution of active ingredients.

[0055] The test data of the oxygen-photonic co-frequency nanocomposite negative oxygen ion liquids prepared in Examples 1-3 and Comparative Examples 1-4 are recorded in the table below:

[0056] By comparing and analyzing the data in the table, it can be seen that the oxygen-photonic co-frequency nanocomposite negative oxygen ion liquid prepared using the processes in Examples 1-3 exhibits advantages over the negative oxygen ion liquid prepared in Comparative Examples 1-4 in terms of negative oxygen ion release concentration, photoresponse performance, stability, and dispersion uniformity. This indicates that a photocatalytic component system was constructed by combining a bismuth-based photocatalyst with nano-carbon quantum dots on the basis of a core-shell structured oxygen photosensitive nanomaterial. Under illumination, this multi-component nanomaterial system can produce a synergistic effect, enhancing the separation and utilization efficiency of photogenerated electron-hole pairs, thereby achieving continuous production of negative oxygen ions under light excitation and improving the product's photoresponse performance and negative oxygen ion release concentration. By mixing functional mineral components with acrylate functional monomers and photoinitiators to form a functionalized prepolymer slurry, and then photocuring and crosslinking it with the photocatalytic composite dispersion, a three-dimensional network gel structure is formed. This structure can encapsulate and fix the photocatalytic components and functional mineral components in a polymer-organosilicon carrier network, slowing down the deactivation and loss of active components, thereby ensuring the long-term effectiveness and stability of negative oxygen ion release performance. Through liquid-phase activation and finished product formulation processes, the photocured gel intermediate is hydrated at low speed and constant temperature in an aqueous environment with a polyol humectant and composite stabilizer system. This process promotes uniform swelling and dispersion of the gel network, while the stabilizer system protects the active ingredients and maintains the system's acid-base balance, avoiding stratification and precipitation during storage and use, and ensuring the uniformity and dispersion stability of the product performance.

[0057] In summary, by comparing and analyzing the relevant data in the table, it can be seen that the oxygen-light co-frequency nanocomposite negative oxygen ion liquid prepared by the preparation process provided by the present invention not only has a high concentration of negative oxygen ion release capacity and photoresponse characteristics, but also has excellent long-term stability and uniformity.

[0058] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0059] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for preparing an oxygen-photon co-frequency nanocomposite negative oxygen ion liquid, characterized in that: The method includes the following steps: Step 1: Preparation of nano precursors. Using silane coupling agent modified titanium dioxide nanoparticles as crystal nuclei, oxygen vacancy type zinc oxide nanorods co-doped with gadolinium, cerium and lanthanum are grown in situ in rare earth salt aqueous solution by hydrothermal method to obtain core-shell structured oxygen photosensitized nanomaterials. Step 2: Preparation of photocatalytic composite dispersion. The oxygen photosensitizing nanomaterials, bismuth-based photocatalysts, and nano-carbon quantum dots prepared in Step 1 are mixed with organosilicon dispersion medium and dispersed under ultrasonic and high-speed shearing to obtain a primary dispersion. Step 3: Functionalization of negative ion releasers. Natural tourmaline powder, far-infrared ceramic powder, and nano-montmorillonite with quaternary ammonium salt groups grafted on the surface are mixed and stirred with acrylate functional monomers containing unsaturated double bonds and photoinitiators under light-protected conditions to obtain functionalized prepolymer slurry. Step 4: Photocuring and stabilization. The primary dispersion obtained in Step 2 is mixed with the functionalized prepolymer slurry obtained in Step 3. Under the protection of an inert gas, it is irradiated and cured with ultraviolet light of a specific wavelength to initiate a cross-linking reaction. After curing, it is subjected to aging treatment to obtain a gel intermediate. Step 5: Liquid phase activation and finished product preparation. The gel intermediate obtained in Step 4, deionized water, polyol moisturizer, and stabilizer system containing superoxide dismutase mimic and antioxidant amino acids are mixed and hydrated under constant temperature and low speed stirring conditions. Finally, the pH value is adjusted to obtain the oxygen-light co-frequency nanocomposite negative oxygen ion liquid.

2. The preparation method of the oxygen-photonic co-frequency nanocomposite negative oxygen ion liquid according to claim 1, characterized in that: In step one, the preparation method of the silane coupling agent modified titanium dioxide nanoparticles is as follows: anatase titanium dioxide nanoparticles with a particle size of 10-30 nm are dispersed in anhydrous ethanol, and silane coupling agent KH-570 accounting for 1-3% of the mass of titanium dioxide is added. The mixture is refluxed at 60-80℃ for 2-4 hours. After the reaction is completed, the nanoparticles are centrifuged, washed with ethanol, and vacuum dried at 50-70℃ to obtain titanium dioxide nanoparticles with olefin groups modified on the surface. The rare earth salt aqueous solution is a mixed aqueous solution of gadolinium nitrate, cerium nitrate, and lanthanum nitrate, wherein the molar concentration ratio of gadolinium ions, cerium ions, and lanthanum ions is 1:0.5-1.5:0.2-0.

8.

3. The preparation method of the oxygen-photonic co-frequency nanocomposite negative oxygen ion liquid according to claim 1, characterized in that: In step one, the hydrothermal method specifically involves: dispersing the modified titanium dioxide nanoparticles in deionized water, adding urea as a mineralizing agent, then adding the gadolinium-cerium-lanthanum rare earth ion mixed salt solution dropwise, adjusting the pH to 8-10 with ammonia, transferring the solution to a high-pressure reactor lined with polytetrafluoroethylene, and reacting at 120-180℃ for 6-18 hours. After the reaction, the solution is allowed to cool naturally, and the product is centrifuged, washed, and dried, then calcined in air at 400-500℃ for 2-4 hours to obtain the oxygen-sensitized nanomaterial. The morphology of the nanomaterial is a spiky spherical structure with titanium dioxide as the core and doped zinc oxide nanorods as the shell. The length of the zinc oxide nanorods is 100-300 nm, and the diameter is 20-50 nm.

4. The preparation method of the oxygen-photonic co-frequency nanocomposite negative oxygen ion liquid according to claim 1, characterized in that: In step two, the primary dispersion is made from the following raw materials by weight: 5-15 parts of oxygen photosensitizing nanomaterials, 3-8 parts of bismuth-based photocatalysts, 1-4 parts of carbon nanoparticles, and 70-90 parts of organosilicon dispersion medium. The bismuth-based photocatalyst is at least one of bismuth oxyhalide or bismuth vanadate, with a particle size of 50-200 nm. The carbon nanoparticles have a particle size of less than 10 nm and are rich in carboxyl and amino functional groups on their surface. The organosilicon dispersion medium is one of vinyl-terminated polydimethylsiloxane or amino-terminated polydimethylsiloxane. The dispersion process is carried out in a high-speed shear disperser at a speed of 8000-15000 rpm for 30-60 minutes, supplemented by ultrasonic treatment with a power of 300-600W. The ultrasonic working mode is intermittent, specifically with a 2-second working interval followed by a 1-second interval.

5. The preparation method of the oxygen-photonic co-frequency nanocomposite negative oxygen ion liquid according to claim 4, characterized in that: The nano-carbon quantum dots are prepared by the following method: citric acid and urea are weighed, mixed in a molar ratio of 1:2-4, dissolved in an appropriate amount of deionized water, transferred to a microwave reactor or high-pressure reactor, and reacted at 160-200℃ for 2-4 hours. After the reaction solution is cooled, it is purified by dialysis and freeze-dried to obtain the nano-carbon quantum dots with a surface rich in carboxyl and amino groups.

6. The preparation method of the oxygen-photonic co-frequency nanocomposite negative oxygen ion liquid according to claim 1, characterized in that: In step three, the functionalized prepolymer slurry is made from the following raw materials by weight: 10-20 parts of natural tourmaline powder, 5-12 parts of far-infrared ceramic powder, 3-8 parts of nano-montmorillonite grafted with quaternary ammonium salt, 15-30 parts of acrylate functional monomers, and 1-3 parts of photoinitiator. The acrylate functional monomers are selected from at least two of hydroxyethyl methacrylate, pentaerythritol triacrylate, and dipentaerythritol pentaacrylate. The photoinitiator is 2-hydroxy-2-methyl-1-phenyl-1-propanone or 1-hydroxycyclohexylphenyl ketone. The mixing and stirring are carried out in a light-proof reactor at a stirring speed of 200-400 rpm for 2-5 hours, and the temperature is controlled at 25-35℃.

7. The preparation method of the oxygen-photonic co-frequency nanocomposite negative oxygen ion liquid according to claim 6, characterized in that: The preparation method of the nano-montmorillonite with surface grafted quaternary ammonium salt is as follows: sodium-based montmorillonite is dispersed in deionized water to form a 1-3 wt% suspension, heated to 60-80℃, and cetyltrimethylammonium bromide is added in a molar amount equivalent to 1.2-1.5 times the cation exchange capacity of montmorillonite. The mixture is stirred at a constant temperature for 6-12 hours. After the reaction is completed, the mixture is centrifuged and washed repeatedly with deionized water and ethanol until no bromide ions are detected. Finally, it is vacuum dried at 50-70℃ and ground through a 200-600 mesh sieve.

8. The preparation method of the oxygen-photonic co-frequency nanocomposite negative oxygen ion liquid according to claim 1, characterized in that: In step four, the mixing process is as follows: all the primary dispersions obtained in step two and all the functionalized prepolymer slurries obtained in step three are added to a transparent reactor equipped with a stirrer and an inert gas inlet and outlet. Under the protection of continuous nitrogen or argon gas, the mixture is stirred and mixed at a speed of 100-300 rpm for 1-2 hours. The wavelength of the ultraviolet irradiation curing is 365 nm, the irradiation intensity is 20-50 mW / cm², the irradiation time is 10-30 minutes, and the irradiation distance is 10-20 cm. The curing conditions are as follows: the photocured product is placed in a constant temperature environment of 40-60℃ and allowed to stand for 24-72 hours to obtain a translucent to milky white gel intermediate.

9. The preparation method of the oxygen-photonic co-frequency nanocomposite negative oxygen ion liquid according to claim 1, characterized in that: In step five, the specific steps of liquid phase activation and finished product preparation are as follows: the gel intermediate obtained in step four is broken into particles smaller than 5 mm, and added to a jacketed stirred tank with deionized water, polyol humectant, and stabilizer system in a weight ratio of 20-40:50-70:5-10:1-3. The polyol humectant is at least one of glycerol, propylene glycol, and sorbitol. The stabilizer system consists of superoxide dismutase mimic, glutathione, and L-arginine in a mass ratio of 1:1:0.

5. Under constant temperature of 25-35℃ and stirring speed of 50-150 rpm, the mixture is slowly stirred and activated for 12-24 hours until the gel particles are completely hydrated and dispersed. Finally, the pH value of the system is adjusted to 6.0-7.5 with food-grade citric acid or sodium bicarbonate dilute solution to obtain the oxygen-light co-frequency nanocomposite negative oxygen ion liquid.

10. An oxygen-photonic co-frequency nanocomposite negative oxygen ion liquid, prepared by the preparation method of the oxygen-photonic co-frequency nanocomposite negative oxygen ion liquid according to any one of claims 1-9, characterized in that: The negative oxygen ion liquid, by weight, comprises: 5-15 parts of a photocatalytic component mainly composed of core-shell structured oxygen photosensitizing nanomaterials; 18-40 parts of a functional mineral component composed of natural tourmaline powder, nano far-infrared ceramic powder, and organic nano montmorillonite; 85-120 parts of a carrier component composed of a polymer formed by photocuring and cross-linking of acrylate functional monomers and an organosilicon dispersion medium; 50-70 parts of deionized water; 5-10 parts of a polyol humectant; and 1-3 parts of a composite stabilizer.

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