Multi-dimensional disinfection device for generating nano-enzyme based on light particle wave and active oxygen
By combining the synergistic effect of light particle waves, vanadium-doped TiO2 nanoenzyme coating film, and ultrasound, the problems of low active oxygen generation efficiency and complex structure in existing air disinfection devices have been solved, achieving rapid and efficient air disinfection, suitable for various environments.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- TIANJIN UNIV
- Filing Date
- 2026-04-14
- Publication Date
- 2026-05-19
AI Technical Summary
Among existing air disinfection technologies, reactive oxygen species (ROS) have low generation efficiency, long reaction pathways, complex device structures, and high maintenance costs. Traditional photocatalytic materials have low efficiency, while traditional TiO2 has a high photogenerated electron-hole recombination rate, resulting in limited ROS production. ROS are also prone to quenching during transport, and the devices have complex structures and high maintenance costs.
By employing photonic wave and vanadium-doped modified TiO2 nanoenzyme coating film, combined with an ultrasonic generator, reactive oxygen species are generated by directly irradiating the nanoenzyme film surface with photonic waves. Vanadium doping reduces the band gap and improves the photogenerated electron-hole separation efficiency, while ultrasonic waves enhance mass transfer, thus achieving rapid and efficient reactive oxygen species generation.
It achieves efficient active oxygen generation, rapid disinfection effect, compact structure for easy integration, safety and environmental protection, no ozone residue, and is suitable for various environments, meeting the needs of rapid response to public health emergencies.
Smart Images
Figure CN122062331A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of air purification and disinfection technology, specifically to a multidimensional disinfection device based on the generation of nanoenzymes from light particle waves and active oxygen. Background Technology
[0002] Air disinfection is an important means of preventing respiratory infectious diseases and ensuring public health safety. Currently, common air disinfection technologies mainly include ultraviolet (UV) irradiation, ozone disinfection, chemical disinfectant spraying, high-efficiency particulate air (HEPA) filters, and photocatalytic oxidation technology. UV disinfection uses 254nm UV light to destroy the DNA structure of microorganisms, but its penetration is weak, it has blind spots, and prolonged exposure is harmful to humans, making it unsuitable for continuous use in occupied environments. While ozone disinfection has strong oxidizing properties, ozone itself is toxic, requiring unoccupied environments for use, and it is prone to residue and inconvenient to operate. Chemical disinfectant sprays can rapidly inactivate pathogens, but leave chemical residues, potentially corroding equipment and irritating the respiratory tract. Photocatalysis commonly uses titanium dioxide (TiO2) to generate reactive oxygen species such as hydroxyl radicals (·OH) under UV irradiation, but traditional TiO2 photocatalytic efficiency is low, and it is usually suspended in powder form or coated on a honeycomb carrier, resulting in a long diffusion path for reactive oxygen species and limited efficiency in capturing and inactivating microorganisms in aerosols.
[0003] In related technologies, such as the air purification device and method based on ultraviolet laser and TiO2 photocatalysis disclosed in announcement number CN111920999B, the air purification device includes an ultraviolet laser, a beam splitter, a beam expander group, a deflection optical path assembly, and a purification chamber. The purification chamber is provided with a TiO2 mesh, and the purification chamber is divided into a first chamber and a second chamber by the TiO2 mesh. The first chamber and the second chamber are vertically connected and intersected. The first chamber is located in the horizontal section of the purification chamber.
[0004] The aforementioned device uses ultraviolet lasers to purify the air, but it still has the following problems: First, the efficiency of reactive oxygen species generation is low. Traditional photocatalytic materials such as pure TiO2 have a high photogenerated electron-hole recombination rate, resulting in limited reactive oxygen species production. Secondly, the reaction path is long, and ROS is easily quenched by water molecules, organic matter, etc. during its transport in the air, resulting in a low effective concentration that actually reaches the surface of microorganisms. Moreover, some devices have complex structures, requiring multi-layer filtration or complex airflow organization, resulting in high maintenance costs. Summary of the Invention
[0005] To address the shortcomings of existing technologies, this invention provides a multidimensional disinfection device based on light particle waves and reactive oxygen species generating nanoenzymes, which solves the problems of low reactive oxygen species generation efficiency, long reaction paths, complex sub-device structures, and high maintenance costs.
[0006] To achieve the above objectives, the present invention provides the following technical solution: a multidimensional disinfection device based on the generation of nanoenzymes from light particle waves and reactive oxygen species, comprising a device housing, and further comprising: An air intake fan is used to draw in air to be disinfected into the device housing. An exhaust fan, used to exhaust disinfected air; A photo-promoted reactive oxygen species (ROS) generating nanoenzyme coating film is disposed on the airflow path between the inlet fan and the outlet fan. A light particle wave generator is located inside the device housing and outside the air intake fan. It is used to emit high-energy light particle waves and irradiate the photo-induced reactive oxygen species nanoenzyme coating film. An ultrasonic generator, located at the bottom of the device housing, provides a vibration source for the photo-induced reactive oxygen species (ROS) nanoenzyme coating membrane. Vanadium doping modifies TiO2, reducing the bandgap and improving the photogenerated electron-hole separation efficiency. The light particle waves directly irradiate the membrane surface, and the ROS generated in situ immediately acts on the flowing air, avoiding transmission loss and achieving synergistic high efficiency.
[0007] Preferably, the front of the device housing is provided with an openable device door, and the device housing is provided with an air inlet layer, an air outlet layer and a bottom layer in sequence from top to bottom. The air inlet layer fan is located at the air inlet at the top of the air inlet layer, the air outlet layer fan is located at the air outlet of the air outlet layer, and the ultrasonic generator is located in the bottom layer.
[0008] Preferably, the photo-induced reactive oxygen species (ROS) generating nanoenzyme coating film uses a polyacrylonitrile film as a substrate and is coated with vanadium-doped titanium dioxide nanomaterials.
[0009] Preferably, the nanomaterial can be replaced by any one of iron, copper, and cobalt doped with titanium dioxide, or any one of iron, copper, and cobalt doped with any one of zinc oxide and tin oxide.
[0010] Preferably, the substrate polyacrylonitrile membrane is replaced by any one of polyvinylidene fluoride membrane, polyethersulfone membrane, glass fiber membrane, and ceramic fiber membrane.
[0011] Preferably, the vanadium-doped titanium dioxide nanomaterial is in the form of nanoparticles with an average particle size of 20-50 nm.
[0012] This invention provides a multidimensional disinfection device based on the generation of nanoenzymes from light particle waves and reactive oxygen species. It possesses the following beneficial effects: 1. Synergistic and efficient: By modifying TiO2 with vanadium doping, the band gap is reduced and the efficiency of photogenerated electron-hole separation is improved; the light particle wave directly irradiates the film surface, and ROS is generated in situ and immediately acts on the air flowing through it, avoiding transmission loss. According to the test, the inactivation rate of Bacillus subtilis var. niger spores reaches more than 95% within 30 seconds.
[0013] 2. Rapid response: The device has a compact structure and a short contact time between air and active oxygen, enabling disinfection in seconds and meeting the needs of rapid response to public health emergencies.
[0014] 3. Safe and environmentally friendly: It does not use ozone or chemical disinfectants. After the active oxygen reacts, it degrades into water and oxygen, leaving no residue. It can coexist with humans and machines.
[0015] 4. Simple structure: It adopts a modular design of "fan-membrane-fan", which is small in size and easy to integrate into existing air conditioning systems or be used as a stand-alone device.
[0016] 5. Auxiliary enhancement: An ultrasonic generator is added to enhance mass transfer on the membrane surface through cavitation effect, further increasing the production of reactive oxygen species, and maintaining stable disinfection performance even under harsh environments or high loads. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 Transmission electron microscope image of nanozymes generated by photocatalytic reactive oxygen species; Figure 3 Total density of states and momentum projection density of states for photo-induced reactive oxygen species (ROS) generation nanozymes; Figure 4 Fluorescent staining images of live / dead Staphylococcus aureus bacteria (green: live bacteria, red: dead bacteria) for the action of photo-induced reactive oxygen species generation nanozymes. Figure 5 The results of the inhibition zone experiment on Staphylococcus aureus using photo-induced reactive oxygen species to generate nanozymes; Figure 6 Flow cytometry results of live / dead bacteria after Staphylococcus aureus was treated with photo-induced reactive oxygen species nanozymes (FITC channel: live bacteria marker).
[0018] Among them, 1. Device shell; 101. Air inlet layer; 102. Air outlet layer; 103. Device door; 2. Air outlet; 3. Ultrasonic generator; 4. Air inlet layer fan; 5. Air outlet layer fan; 6. Photo-induced active oxygen generation nanoenzyme coating film; 7. Photoparticle wave generator. Detailed Implementation
[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0020] Example: like Figure 1-6 As shown, this embodiment of the invention provides a multidimensional disinfection device based on the generation of nanoenzymes from light particle waves and active oxygen, including a device housing 1, an openable device door 103 at the front of the device housing 1, and an air inlet layer 101, an air outlet layer 102, and a bottom layer arranged sequentially from top to bottom inside the device housing 1. Also includes: Air intake fan 4 is used to draw air to be disinfected into the device housing 1. Air intake fan 4 is located at the air intake at the top of the air intake layer 101. The exhaust fan 5 is used to exhaust the disinfected air. The exhaust fan 5 is located at the exhaust port 2 of the exhaust layer 102. A photo-induced reactive oxygen species (ROS) generation nanoenzyme coating film 6 is disposed on the airflow path between the inlet fan 4 and the outlet fan 5. The photo-induced ROS generation nanoenzyme coating film 6 uses a polyacrylonitrile (PAN) film as a substrate and is coated with vanadium-doped titanium dioxide (TiO2:V) nanomaterials. The vanadium-doped titanium dioxide (TiO2:V) nanomaterials are in the form of nanoparticles with an average particle size of 20~50 nm. The following provides a method for preparing vanadium-doped titanium dioxide (TiO2:V) nanomaterials and a coating film for photocatalytic reactive oxygen species generation disinfectant: (1) Preparation of vanadium-doped titanium dioxide (TiO2:V) nanomaterials 10 mL of tetrabutyl titanate (Ti(OC4H9)4) was slowly added to 30 mL of anhydrous ethanol and magnetically stirred for 30 min to form a homogeneous titanium source precursor solution. Ammonium metavanadate (NH4VO3) was weighed and dissolved in 10 mL of deionized water, maintaining a vanadium to titanium molar ratio of 1:50 to 1:20. The solution was stirred until completely dissolved to obtain a vanadium source solution. The vanadium source solution was then slowly added dropwise to the titanium source precursor solution, and stirring was continued for 30 min. A homogeneous mixed solution was formed by stirring for 1 hour. The pH of the mixed solution was adjusted to 2-3 with dilute hydrochloric acid, and stirring was continued for 1 hour to obtain a clear precursor sol. The precursor sol was transferred to a stainless steel reactor lined with polytetrafluoroethylene, sealed, and placed in an oven for hydrothermal reaction at 200°C for 12 hours. After the reaction was completed, the mixture was naturally cooled to room temperature. The precipitate was washed three times each with deionized water and anhydrous ethanol, and collected by centrifugation. The washed precipitate was placed in a vacuum drying oven and dried at 80°C for 12 hours. After grinding, vanadium-doped titanium dioxide (TiO2:V) nanomaterials were obtained. The obtained material was uniform in size, had good crystallinity, and was in the form of nanoparticles with an average particle size of 20-50 nm.
[0021] (2) Preparation of a coating film for photo-induced reactive oxygen species generation disinfectant Take 10 g of polyacrylonitrile (PAN) powder, dissolve it in 90 mL of N,N-dimethylformamide (DMF), and stir magnetically for 3 h in a water bath at 60 °C to form a PAN spinning solution with a mass fraction of 10%. PAN substrate membranes were prepared using electrospinning technology: the spinning solution was injected into a syringe, and the spinning voltage was set to 15 kV, the receiving distance to 15 cm, and the feed rate to 0.5 mL / h. PAN nanofiber membranes were collected on a receiving plate, and the spinning time was 4 h, resulting in a PAN substrate membrane with a thickness of approximately 50 μm. The prepared TiO2:V nanomaterials were added to anhydrous ethanol to prepare a TiO2:V dispersion with a mass fraction of 1%–5%, and ultrasonically dispersed for 30 min to ensure uniform dispersion of the nanomaterials. The TiO2:V dispersion was uniformly sprayed onto the surface of the PAN substrate membrane using an ultrasonic spraying device. The spraying parameters were set as follows: spraying distance 10 cm, spraying pressure 0.2 MPa, spraying speed 20 mm / s, and 3–5 spraying passes. After spraying, the composite membrane was placed in a vacuum drying oven and dried at 60°C for 6 hours. h, allowing the solvent to evaporate completely, the TiO2:V nanomaterials firmly adhere to the surface of the PAN membrane and the gaps between the fibers, thus obtaining a photo-promoted active oxygen generation disinfectant coating membrane (TiO2:V / PAN composite membrane); the TiO2:V nanomaterials in this coating membrane are uniformly distributed, the loading is controllable, the membrane structure remains intact, and the air permeability is good, which can effectively ensure air circulation and provide sufficient active oxygen generation sites.
[0022] In other embodiments, the nanomaterial can be replaced by any one of iron, copper, or cobalt doped with titanium dioxide, or any one of iron, copper, or cobalt doped with any one of zinc oxide or tin oxide; the substrate polyacrylonitrile (PAN) membrane can be replaced by any one of polyvinylidene fluoride (PVDF) membrane, polyethersulfone (PES) membrane, glass fiber membrane, or ceramic fiber membrane. The iron, copper, and cobalt mentioned above are transition metals; zinc oxide and tin oxide are wide bandgap semiconductor materials, and the resulting nanomaterials can still generate active oxygen through photoexcitation to achieve air disinfection. Polyvinylidene fluoride (PVDF) membranes and polyethersulfone (PES) membranes are porous polymer membranes; glass fiber membranes and ceramic fiber membranes are inorganic fiber membranes; this base membrane can still support photocatalytic materials and allow airflow; The light particle wave generator 7 is located inside the device housing 1 and outside the air intake fan 4. It is used to emit high-energy light particle waves to irradiate the photo-induced reactive oxygen species (ROS) generating nanoenzyme coated membrane 6. The light particle wave generator 7 irradiates the photo-induced ROS generating nanoenzyme coated membrane 6 to excite TiO2:V to efficiently generate reactive oxygen species (ROS). After the air flowing over the membrane surface comes into contact with the ROS, pathogenic microorganisms are rapidly inactivated. An ultrasonic generator 3 is located at the bottom of the device housing 1 and is used to provide a vibration source for the photo-induced reactive oxygen species nanoenzyme coating membrane 6. The ultrasonic generator 3 is located inside the bottom layer. The vibrating end face of the ultrasonic generator 3 is in contact with the photo-induced reactive oxygen species generation nanoenzyme coated membrane 6. The ultrasonic generator 3 enhances the mass transfer on the membrane surface through the ultrasonic cavitation effect, thereby synergistically improving the reactive oxygen species generation efficiency.
[0023] This invention is applicable to various enclosed or semi-enclosed spaces that require air disinfection, such as hospitals, laboratories, public transportation (subways, high-speed rail), schools, shopping malls, and homes. It can also be embedded in air conditioning systems or fresh air systems.
[0024] Working principle: First, the inlet fan 4 draws in the air to be disinfected into the device housing 1. The photo-particle wave generator 7 irradiates the photo-induced reactive oxygen species (ROS) generation nanoenzyme-coated membrane 6, which excites TiO2:V to efficiently generate reactive oxygen species (ROS). After the air flowing across the membrane surface comes into contact with the ROS, the pathogenic microorganisms are quickly inactivated. The vibrating end face of the ultrasonic generator 3 comes into contact with the photo-induced reactive oxygen species (ROS) generation nanoenzyme-coated membrane 6. The ultrasonic generator 3 enhances the mass transfer on the membrane surface through the ultrasonic cavitation effect, synergistically improving the efficiency of reactive oxygen species generation. After disinfection, the outlet fan 5 discharges the disinfected air, completing the multi-dimensional disinfection operation.
[0025] 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 variations 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 multidimensional disinfection device based on the generation of nanoenzymes from light particle waves and reactive oxygen species, comprising a device housing (1), characterized in that, Also includes: An air intake fan (4) is used to draw in air to be disinfected into the device housing (1); An exhaust fan (5) is used to exhaust the disinfected air. A photo-promoted reactive oxygen species (ROS) generating nanoenzyme coating film (6) is disposed on the airflow path between the inlet fan (4) and the outlet fan (5); The light particle wave generator (7) is located inside the device housing (1) and outside the air intake fan (4), and is used to emit high-energy light particle waves and irradiate the photo-promoted reactive oxygen generation nanoenzyme coating film (6). An ultrasonic generator (3) is located at the bottom of the device housing (1) and is used to provide a vibration source for the photo-induced reactive oxygen species nanoenzyme coating membrane (6).
2. The multidimensional disinfection device based on the generation of nanoenzymes from light particle waves and reactive oxygen species according to claim 1, characterized in that: The front of the device housing (1) is provided with an openable device door (103). The device housing (1) is provided with an air inlet layer (101), an air outlet layer (102), and a bottom layer from top to bottom. The air inlet fan (4) is located at the air inlet at the top of the air inlet layer (101). The air outlet fan (5) is located at the air outlet (2) of the air outlet layer (102). The ultrasonic generator (3) is located in the bottom layer.
3. The multidimensional disinfection device based on the generation of nanoenzymes from light particle waves and reactive oxygen species according to claim 1, characterized in that: The photo-induced reactive oxygen species generating nanoenzyme coating film (6) is based on a polyacrylonitrile (PAN) film, and its surface is coated with vanadium-doped titanium dioxide (TiO2:V) nanomaterials.
4. The multidimensional disinfection device based on the generation of nanoenzymes from light particle waves and reactive oxygen species according to claim 3, characterized in that: The nanomaterial can be replaced by any one of iron, copper, or cobalt doped with titanium dioxide, or any one of iron, copper, or cobalt doped with any one of zinc oxide or tin oxide.
5. The multidimensional disinfection device based on the generation of nanoenzymes from light particle waves and reactive oxygen species according to claim 3, characterized in that: The substrate polyacrylonitrile (PAN) membrane can be replaced with any one of polyvinylidene fluoride membrane, polyethersulfone membrane, glass fiber membrane, or ceramic fiber membrane.
6. The multidimensional disinfection device based on the generation of nanoenzymes from light particle waves and reactive oxygen species according to claim 3, characterized in that: The vanadium-doped titanium dioxide (TiO2:V) nanomaterials are in the form of nanoparticles with an average particle size of 20-50 nm.