Nanometer titanium oxide main body photocatalytic sterilization multi-element material and preparation method thereof

Abstract

The nano titanium oxide main body photocatalytic sterilization multi-element material provided by the invention comprises 85%-98% of a nano titanium oxide material, 2%-15% of a perovskite material and a modifier, the modifier comprises silver, silver oxide and graphene, and the modifier comprises a nano titanium oxide main body and a nano titanium oxide main body. The nano titanium oxide main body photocatalytic sterilization multi-element material can fully utilize the characteristics of a perovskite structure material, overcomes the defects of a nano titanium oxide material, improves the light utilization rate, inhibits carrier recombination, improves the antibacterial durability, can utilize ultraviolet light to carry out catalytic sterilization and can also utilize ions to carry out sterilization, and the antibacterial effect is good. Sterilization can be achieved through the photolysis reaction of visible light, the synergistic composite sterilization effect is achieved, harmful germs are rapidly and effectively killed, the environment is kept fresh and safe, and the comprehensive sterilization and deodorization effect can be achieved by adding the modifier; the preparation method of the nano titanium oxide main body photocatalytic sterilization multi-element material provided by the invention is simple in steps, convenient to operate and easy to implement.

Description

Technical Field

[0001] This invention relates to the field of bactericidal materials technology, specifically to a nano-titanium oxide-based photocatalytic bactericidal multi-component material and its preparation method. Background Technology

[0002] Currently, photocatalytic sterilization materials are mainly composed of nano-titanium oxide (TiO2). Their mechanism of action is as follows: under ultraviolet light irradiation, electrons transition from the valence band to the conduction band (3.2 eV), forming holes that capture electrons from oxygen adsorbed and dissolved on the surface of nano-titanium oxide (TiO2), thus forming active oxygen (O2). - Holes will adsorb OH groups on the surface of nano-titanium oxide (TiO2). - It is oxidized by H2O to form free radicals HO - reactive oxygen species (O2) - and free radicals HO - It can penetrate the cell wall of bacteria and enter the bacterial cell, preventing the transport of film-forming substances and blocking its respiratory and electron transport systems, thereby effectively killing bacteria.

[0003] While nano-titanium oxide (TiO2) has the advantages mentioned above, it still has the following disadvantages:

[0004] (1) It has a wide band gap (~3.2eV) and absorbs only <5% of sunlight (ultraviolet band), requiring an additional UV light source to drive it, and has low utilization of visible light.

[0005] (2) Photogenerated electron-hole pairs recombine easily, which reduces the efficiency of free radical generation. This phenomenon is particularly obvious when there is no co-catalyst, and the recombination rate of charge carriers is high.

[0006] (3) When organic pollutants cover the surface, their active sites are easily deactivated, requiring regular cleaning or photoregeneration, thus limiting the durability of antibacterial properties. Summary of the Invention

[0007] The purpose of this invention is to overcome one or more shortcomings in the prior art and provide a nano-titanium oxide-based photocatalytic bactericidal multi-element material and its preparation method.

[0008] To achieve the above objectives, the product in the technical solution adopted by this invention is a nano-titanium oxide-based photocatalytic bactericidal multi-component material, comprising nano-titanium oxide material, perovskite material, and modifier. The nano-titanium oxide material comprises 85%-98% of the material, the perovskite material comprises 2%-15%, and the modifier comprises silver, silver oxide, and graphene.

[0009] Preferably, the nano-titanium oxide in the nano-titanium oxide material is anatase nano-titanium oxide.

[0010] Preferably, the perovskite material has a composition of 4%-7%.

[0011] More preferably, the perovskite material has a composition of 5%-6%.

[0012] Preferably, the perovskite material has the general chemical formula ABO3, wherein the element occupying position A is a trivalent or divalent element, and the element occupying position B is a variable valence element.

[0013] More preferably, the elements occupying position A include La, Y, Ce, Nd, Sr, Ba, and Ca, and the elements occupying position B include Co, Fe, Ni, Mn, Cr, and Cu.

[0014] More preferably, the elements occupying position A are La and Sr, and the composition ratio of La to Sr is 1:1.

[0015] More preferably, the elements occupying position B are Mn, Fe, and Cu, wherein the composition ratio of Mn, Fe, and Cu is 0.45:0.45:0.1.

[0016] More preferably, the chemical formula of the perovskite material is La. 0.5 Sr 0.5 Mn 0.45 Fe 0.45 Cu 0.1 O3.

[0017] To achieve the above objectives, the method employed in this invention is a method for preparing the aforementioned nano-titanium oxide-based photocatalytic bactericidal multi-component material, comprising the following steps:

[0018] S1. The raw material powder for making perovskite material is prepared into powder according to the proportion, mixed and dry ball milled, then sieved, and then calcined to obtain a complete perovskite structure phase. Then it is wet ball milled, dried, and sieved to obtain ultrafine powder.

[0019] S2. The ultrafine powder and the modifier powder are mixed evenly in a certain proportion and then ball-milled to obtain a mixture;

[0020] S3. Place the mixture in a solvent, add a suspending agent, transfer it to a reaction vessel, and stir continuously until the solvent evaporates to obtain a composite material in which the perovskite material and the modifier are uniformly mixed.

[0021] S4. Mix the composite material and the nano-titanium oxide material in a certain proportion to obtain a nano-titanium oxide-based photocatalytic bactericidal multi-component material.

[0022] Preferably, the raw material powders used to make the perovskite material include La2O3, SrCO3, Fe2O3, MnO2, and CuO.

[0023] Preferably, the chemical formula of the fully perovskite phase is La.0.5 Sr 0.5 Mn 0.475 Fe 0.475 Cu 0.1 O3.

[0024] Preferably, in step S1, the dry ball milling time is 10-24 hours, the calcination temperature is 1100℃-1250℃, the calcination time is not less than 2 hours, the wet ball milling time is not less than 24 hours, the drying temperature is 80℃-95℃, and the mesh size of the sieve is 100 mesh.

[0025] Preferably, in step S2, the ultrafine powder component is 95%-99.5%, and the modifier is 0.5%-5% Ag2O and / or 2% graphene.

[0026] Preferably, the ball milling time in step S2 is not less than 24 hours.

[0027] Preferably, the proportion of composite material added in step S4 is 2%-5%.

[0028] Preferably, the nano-titanium oxide host photocatalytic bactericidal multi-component material in step S4 is formed by pressing and sintering to obtain a block electrode sheet with a relative density of 70%-95%, and the sintering temperature is 850℃-1300℃.

[0029] Preferably, the nano-titanium oxide host photocatalytic bactericidal multi-component material in step S4 is made into a parallel-mode finger-like structure to reduce power consumption and increase bactericidal efficiency.

[0030] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0031] The present invention provides a nano-titanium oxide-based photocatalytic bactericidal multi-component material, comprising nano-titanium oxide material, perovskite material, and modifiers. The nano-titanium oxide material comprises 85%-98% of the material, the perovskite material comprises 2%-15%, and the modifiers include silver, silver oxide, and graphene. This nano-titanium oxide-based photocatalytic bactericidal multi-component material fully utilizes the characteristics of perovskite structure materials, compensates for the shortcomings of nano-titanium oxide materials, improves light utilization, inhibits carrier recombination, and enhances antibacterial durability. It can utilize ultraviolet photocatalytic bactericidal, ion bactericidal, and visible light photolysis reaction for bactericidal effects, achieving a synergistic and comprehensive bactericidal effect. This allows for the rapid and effective elimination of harmful bacteria, maintaining a fresh and safe environment. By adding modifiers including silver, silver oxide, and graphene, a low-power power supply can be applied to form a composite electrocatalytic bactericidal effect, achieving comprehensive bactericidal and deodorizing effects. The method for manufacturing the nano-titanium oxide-based photocatalytic bactericidal multi-component material provided by the present invention is simple, convenient, and easy to implement. Detailed Implementation

[0032] The present invention provides a nano-titanium oxide-based photocatalytic bactericidal multi-component material, comprising nano-titanium oxide material, perovskite material, and modifier. The nano-titanium oxide material comprises 85%-98% of the material, the perovskite material comprises 2%-15%, and the modifier comprises silver, silver oxide, and graphene.

[0033] Preferably, the nano-titanium oxide in the nano-titanium oxide material is anatase nano-titanium oxide.

[0034] Preferably, the perovskite material comprises 4%-7% of the material.

[0035] More preferably, the perovskite material comprises 5%-6% of the material.

[0036] Preferably, the chemical formula of the perovskite material is ABO3, wherein the element occupying position A is a trivalent or divalent element, and the element occupying position B is a variable valence element.

[0037] More preferably, the elements occupying position A include La, Y, Ce, Nd, Sr, Ba, and Ca, and the elements occupying position B include Co, Fe, Ni, Mn, Cr, and Cu.

[0038] More preferably, the elements occupying position A are La and Sr, and the composition ratio of La to Sr is 1:1.

[0039] More preferably, the elements occupying position B are Mn, Fe, and Cu, wherein the composition ratio of Mn, Fe, and Cu is 0.45:0.45:0.1.

[0040] More preferably, the chemical formula of the perovskite material is La. 0.5 Sr 0.5 Mn 0.45 Fe 0.45 Cu 0.1 O3.

[0041] This nano-titanium oxide-based photocatalytic bactericidal multi-element material fully utilizes the characteristics of perovskite structure materials, compensates for the shortcomings of nano-titanium oxide materials, improves light utilization, inhibits carrier recombination, and enhances antibacterial durability. It can utilize ultraviolet photocatalytic sterilization, ion sterilization, and visible light photolysis to achieve synergistic and compound sterilization effects, thereby quickly and effectively eliminating harmful bacteria and maintaining a fresh and safe environment. By adding modifiers including silver, silver oxide, and graphene, it can also form a compound electrocatalytic sterilization by applying a low-power power supply, achieving a comprehensive sterilization and deodorization effect.

[0042] Specifically, perovskite structural materials have the following advantages:

[0043] (1) Endogenous redox activity: Mn and Fe multivalent state catalysis (e.g., Mn) 3+ / Mn 4+ Fe 2+ / Fe 3+ It can directly generate reactive oxygen species (ROS) and kill bacteria without the need for light (chemical catalysis mechanism).

[0044] (2) Improved visible light response: The band gap is narrower (~2.0–2.5eV), which can absorb 30–50% of visible light and improve the utilization rate of sunlight.

[0045] (3) Kinetics of the reaction enhanced by mixed conductivity: The conductivity of oxygen ions promotes surface oxygen exchange and accelerates O2. - Generation, electronic conductivity suppresses carrier recombination.

[0046] (4) High temperature / chemical stability: High temperature resistance (>800℃) and oxidation resistance, suitable for high temperature sterilization of medical devices.

[0047] Perovskite (ABO3) structures possess titanium dioxide (TiO2)-like functions in the visible light range: they can absorb light energy (typically visible or ultraviolet light, accounting for 55% of sunlight), generate electron-hole pairs, and effectively separate electrons and holes, subsequently reacting with surface water or oxygen to generate reactive oxygen species. Their advantages include a bandgap narrowed to the visible light range (typically E9 ≈ 1.5-2.5 eV), allowing for visible light absorption; good electronic conductivity (Co-O octahedral covalent network); and the oxygen vacancies introduced by Sr doping and the Co... 3+ / Co 4+ Valence state cycling can promote charge separation and reduce recombination rate.

[0048] Taking into account production costs, performance, environmental protection, and safety of use, La 0.5 Sr 0.5 FeO3, La 0.5 Sr 0.5 MnO3 and La 0.5 Sr 0.5 Fe 0.5 Mn 0.5 O3 is one of the best materials to choose from.

[0049] Adding trace amounts of copper can optimize its electronic conduction and ion diffusion properties; therefore, multi-metallic elements (such as Mn) are introduced at the B position. 0.5 Fe 0.5 Mn 0.48 Fe 0.48 Cu 0.04 Combining the high conductivity of Mn with the OH group of Fe -The ability to generate Cu and appropriate Cu doping can optimize electron conduction and ion diffusion, achieving a synergistic effect of "high conductivity and high activity".

[0050] Therefore, to enhance the bactericidal efficacy of nano-titanium oxide (TiO2) material systems while considering cost, chemical stability, and safety, some perovskite photocatalyst materials can be added to optimize performance.

[0051] This invention also provides a method for preparing the above-mentioned nano-titanium oxide-based photocatalytic bactericidal multi-component material, comprising the following steps:

[0052] S1. The raw material powder for making perovskite material is prepared into powder according to the proportion, mixed and dry ball milled, then sieved, and then calcined to obtain a complete perovskite structure phase. Then it is wet ball milled, dried, and sieved to obtain ultrafine powder.

[0053] S2. The ultrafine powder and the modifier powder are mixed evenly in a certain proportion and then ball-milled to obtain a mixture;

[0054] S3. Place the mixture in a solvent, add a suspending agent, transfer it to a reaction vessel, and stir continuously until the solvent evaporates to obtain a composite material in which the perovskite material and the modifier are uniformly mixed.

[0055] S4. Mix the composite material and the nano-titanium oxide material in a certain proportion to obtain a nano-titanium oxide-based photocatalytic bactericidal multi-component material.

[0056] Preferably, the raw material powders used to make the perovskite material include La2O3, SrCO3, Fe2O3, MnO2, and CuO.

[0057] Preferably, the chemical formula of the fully perovskite phase is La. 0.5 Sr 0.5 Mn 0.475 Fe 0.475 Cu 0.1 O3.

[0058] Preferably, in step S1, the dry ball milling time is 10-24 hours, the calcination temperature is 1100℃-1250℃, the calcination time is not less than 2 hours, the wet ball milling time is not less than 24 hours, the drying temperature is 80℃-95℃, and the mesh size of the sieve is 100 mesh.

[0059] Preferably, in step S2, the ultrafine powder component is 95%-99.5%, and the modifier is 0.5%-5% Ag2O and / or 2% graphene.

[0060] Preferably, the ball milling time in step S2 is not less than 24 hours.

[0061] Preferably, the proportion of composite material added in step S4 is 2%-5%.

[0062] Preferably, the nano-titanium oxide host photocatalytic bactericidal multi-component material in step S4 is formed by pressing and sintering to obtain a block electrode sheet with a relative density of 70%-95%, and the sintering temperature is 850℃-1300℃.

[0063] Preferably, the nano-titanium oxide host photocatalytic bactericidal multi-component material in step S4 is made into a parallel-mode finger-like structure to reduce power consumption and increase bactericidal efficiency.

[0064] The method for producing this nano-titanium oxide-based photocatalytic bactericidal multi-element material is simple, convenient, and easy to implement. The resulting nano-titanium oxide-based photocatalytic bactericidal multi-element material can overcome the limitation that it can only function under ultraviolet light irradiation, giving it excellent antibacterial, antifouling, and deodorizing functions over a wide wavelength range.

[0065] The following is a description using specific embodiments.

[0066] Example 1: Adding 5% perovskite material (La) to nano-titanium oxide powder 0.5 Sr 0.5 The manufacturing method of this perovskite material is as follows: (CoO3 + 2% Ag2O)

[0067] La2O3, SrCO3, and Co3O4 were mixed in a certain proportion to prepare (La 0.5 Sr 0.5 CoO3, after being ball-milled and sieved, was calcined at 1200℃ for 2 hours to form a complete perovskite structure. Then, 98wt% (La) 0.5 Sr 0.5 CoO3 and 2wt% Ag2O are then mixed to form a homogeneous mixture, yielding a perovskite material.

[0068] Example 2: Adding 5% perovskite material (La) to nano-titanium oxide powder 0.5 Sr 0.5 The manufacturing method of this perovskite material is as follows: (MnO3 + 2% Ag2O)

[0069] La₂O₃, SrCO₃, and MnO₂ were mixed in a certain proportion to prepare (La 0.5 Sr 0.5 MnO3, after being mixed, ball-milled, and sieved, was calcined at 1200℃ for 2 hours to form a complete perovskite structure. Then, 98wt% (La) 0.5 Sr 0.5 MnO3 and 2wt% Ag2O are then mixed to form a homogeneous mixture, yielding a perovskite material.

[0070] Example 3: Adding 5% perovskite material (La) to nano-titanium oxide powder 0.5 Sr 0.5 The manufacturing method of this perovskite material is as follows: (FeO3 + 2% Ag2O)

[0071] La₂O₃, SrCO₃, and Fe₂O₃ were mixed in a certain proportion to prepare (La 0.5 Sr 0.5 FeO3, after being ball-milled and sieved, was calcined at 1200℃ for 2 hours to form a complete perovskite structure. Then, 98wt% (La) 0.5 Sr 0.5 FeO3 and 2wt% Ag2O are then mixed to form a homogeneous mixture, yielding a perovskite material.

[0072] Example 4: Adding 5% perovskite material (La) to nano-titanium oxide powder 0.5 Sr 0.5 The manufacturing method of this perovskite material is as follows: (NiO3 + 2% Ag2O)

[0073] La2O3, SrCO3, and NiO were mixed in a certain proportion to prepare (La 0.5 Sr 0.5 NiO3, after being ball-milled and sieved, was calcined at 1200℃ for 2 hours to form a complete perovskite structure. Then, 98wt% (La) 0.5 Sr 0.5 NiO3 and 2wt% Ag2O are then mixed to form a homogeneous mixture, yielding a perovskite material.

[0074] Example 5: Adding 5% perovskite material (La) to nano-titanium oxide powder 0.5 Sr 0.5 The manufacturing method of this perovskite material is as follows: (CrO3 + 2% Ag2O)

[0075] La₂O₃, SrCO₃, and Cr₂O₃ were mixed in a certain proportion to prepare (La 0.5 Sr 0.5 CrO3, after being ball-milled and sieved, was calcined at 1200℃ for 2 hours to form a complete perovskite structure. Then, 98wt% (La) 0.5 Sr 0.5 CrO3 and 2wt% Ag2O are then mixed to form a homogeneous mixture, yielding a perovskite material.

[0076] Example 6: Adding 5% perovskite material (La) to nano-titanium oxide powder 0.5 Sr 0.5 The manufacturing method of this perovskite material is as follows: (CoO3 + 2% graphene)

[0077] La2O3, SrCO3, and Co3O4 were mixed in a certain proportion to prepare (La 0.5 Sr 0.5 CoO3, after being ball-milled and sieved, was calcined at 1200℃ for 2 hours to form a complete perovskite structure. Then, 98wt% (La) 0.5 Sr 0.5 CoO3 and 2wt% graphene are then mixed to form a homogeneous mixture, resulting in a perovskite material.

[0078] Example 7: Adding 5% perovskite material (La) to nano-titanium oxide powder 0.5 Sr 0.5 The manufacturing method of this perovskite material is as follows: (MnO3 + 2% graphene)

[0079] La₂O₃, SrCO₃, and MnO₂ were mixed in a certain proportion to prepare (La 0.5 Sr 0.5 MnO3, after being mixed, ball-milled, and sieved, was calcined at 1200℃ for 2 hours to form a complete perovskite structure. Then, 98wt% (La) 0.5 Sr 0.5 MnO3 and 2wt% graphene are then mixed to form a homogeneous mixture, resulting in a perovskite material.

[0080] Example 8: Adding 5% perovskite material (La) to nano-titanium oxide powder 0.5 Sr 0.5 The manufacturing method of this perovskite material is as follows: (FeO3 + 2% graphene)

[0081] La₂O₃, SrCO₃, and Fe₂O₃ were mixed in a certain proportion to prepare (La 0.5 Sr 0.5 FeO3, after being ball-milled and sieved, was calcined at 1200℃ for 2 hours to form a complete perovskite structure. Then, 98wt% (La) 0.5 Sr 0.5 FeO3 and 2wt% graphene are mixed to form a homogeneous mixture, thus obtaining perovskite material.

[0082] Example 9: Adding 5% perovskite material (La) to nano-titanium oxide powder 0.5 Sr 0.5 The manufacturing method of this perovskite material is as follows: (NiO3 + 2% graphene)

[0083] La2O3, SrCO3, and NiO were mixed in a certain proportion to prepare (La 0.5 Sr 0.5 NiO3, after being ball-milled and sieved, was calcined at 1200℃ for 2 hours to form a complete perovskite structure. Then, 98wt% (La) 0.5Sr 0.5 NiO3 and 2wt% graphene are then mixed to form a homogeneous mixture, resulting in a perovskite material.

[0084] Example 10: Adding 5% perovskite material (La) to nano-titanium oxide powder 0.5 Sr 0.5 The manufacturing method of this perovskite material is as follows: (CrO3 + 2% graphene)

[0085] La₂O₃, SrCO₃, and Cr₂O₃ were mixed in a certain proportion to prepare (La 0.5 Sr 0.5 CrO3, after being ball-milled and sieved, was calcined at 1200℃ for 2 hours to form a complete perovskite structure. Then, 98wt% (La) 0.5 Sr 0.5 CrO3 and 2wt% graphene are mixed to form a homogeneous mixture, thus obtaining a perovskite material.

[0086] Example 11: Adding 5% perovskite material (La) to nano-titanium oxide powder 0.5 Sr 0.5 The perovskite material is manufactured using a process involving the addition of 2% CoO3 and 2% Ag2O and 2% graphene.

[0087] La2O3, SrCO3, and Co3O4 were mixed in a certain proportion to prepare (La 0.5 Sr 0.5 CoO3, after being ball-milled and sieved, was calcined at 1200℃ for 2 hours to form a complete perovskite structure. Then, 96wt% (La) 0.5 Sr 0.5 CoO3 is mixed with 2wt% Ag2O and 2wt% graphene to form a homogeneous mixture, thus obtaining a perovskite material.

[0088] Example 12: Adding 5% perovskite material (La) to nano-titanium oxide powder 0.5 Sr 0.5 The manufacturing method of this perovskite material is as follows: (MnO3 + 2% Ag2O + 2% graphene)

[0089] La₂O₃, SrCO₃, and MnO₂ were mixed in a certain proportion to prepare (La 0.5 Sr 0.5 MnO3, after being mixed, ball-milled, and sieved, was calcined at 1200℃ for 2 hours to form a complete perovskite structure. Then, 96wt% (La) 0.5 Sr 0.5 MnO3 is mixed with 2wt% Ag2O and 2wt% graphene to form a homogeneous mixture, thus obtaining a perovskite material.

[0090] Example 13: Adding 5% perovskite material (La) to nano-titanium oxide powder 0.5 Sr 0.5 The manufacturing method of this perovskite material is as follows: (FeO3 + 2% Ag2O + 2% graphene)

[0091] La₂O₃, SrCO₃, and Fe₂O₃ were mixed in a certain proportion to prepare (La 0.5 Sr 0.5 FeO3, after being ball-milled and sieved, was calcined at 1200℃ for 2 hours to form a complete perovskite structure. Then, 96wt% (La) 0.5 Sr 0.5 FeO3 is mixed with 2% Ag2O and 2wt% graphene to form a homogeneous mixture, thus obtaining perovskite material.

[0092] Example 14: Adding 5% perovskite material (La) to nano-titanium oxide powder 0.5 Sr 0.5 The manufacturing method of this perovskite material is as follows: (NiO3 + 2% Ag2O + 2% graphene).

[0093] La2O3, SrCO3, and NiO were mixed in a certain proportion to prepare (La 0.5 Sr 0.5 NiO3, after being ball-milled and sieved, was calcined at 1200℃ for 2 hours to form a complete perovskite structure. Then, 96wt% (La) 0.5 Sr 0.5 NiO3 is mixed with 2% Ag2O and 2wt% graphene to form a homogeneous mixture, thus obtaining a perovskite material.

[0094] Example 15: Adding 5% perovskite material (La) to nano-titanium oxide powder 0.5 Sr 0.5 The perovskite material is manufactured using a process involving CrO3 + 2% Ag2O + 2% graphene.

[0095] La₂O₃, SrCO₃, and Cr₂O₃ were mixed in a certain proportion to prepare (La 0.5 Sr 0.5 CrO3, after being ball-milled and sieved, was calcined at 1200℃ for 2 hours to form a complete perovskite structure. Then, 96wt% (La) 0.5 Sr 0.5 CrO3 is mixed with 2% Ag2O and 2wt% graphene to form a homogeneous mixture, thus obtaining perovskite material.

[0096] Example 16: Adding 5% perovskite material (La) to nano-titanium oxide powder 0.5 Sr 0.5 (Co)0.5 Mn 0.5 The manufacturing method of this perovskite material is as follows: (O3 + 2% Ag2O + 2% graphene).

[0097] La2O3, SrCO3, Co3O4, and MnO2 were mixed in a certain proportion to prepare (La 0.5 Sr 0.5 (Co) 0.5 Mn 0.5 O3, after being ball-milled and sieved, was calcined at 1200℃ for 2 hours to form a complete perovskite structure. Then, 96wt% (La) 0.5 Sr 0.5 (Co) 0.5 Mn 0.5 O3 is mixed with 2wt% Ag2O and 2wt% graphene to form a homogeneous mixture, thus obtaining perovskite material.

[0098] Example 17: Adding 5% perovskite material (La) to nano-titanium oxide powder 0.5 Sr 0.5 (Co) 0.5 Fe 0.5 )

[0099] The manufacturing method of this perovskite material is as follows: (O3 + 2% Ag2O + 2% graphene).

[0100] La₂O₃, SrCO₃, Co₃O₄, and Fe₂O₃ were mixed in a certain proportion to prepare (La 0.5 Sr 0.5 (Co) 0.5 Fe 0.5 O3, after being ball-milled and sieved, was calcined at 1200℃ for 2 hours to form a complete perovskite structure. Then, 96wt% (La) 0.5 Sr 0.5 (Co) 0.5 Fe 0.5 O3 is mixed with 2wt% Ag2O and 2wt% graphene to form a homogeneous mixture, thus obtaining perovskite material.

[0101] Example 18: Adding 5% perovskite material (La) to nano-titanium oxide powder 0.5 Sr 0.5 )(Mn 0.5 Fe 0.5 The manufacturing method of this perovskite material is as follows: (O3 + 2% Ag2O + 2% graphene).

[0102] La₂O₃, SrCO₃, MnO₂, and Fe₂O₃ were mixed in a certain proportion to prepare (La 0.5 Sr 0.5 )(Mn0.5 Fe 0.5 O3, after being ball-milled and sieved, was calcined at 1200℃ for 2 hours to form a complete perovskite structure. Then, 96wt% (La) 0.5 Sr 0.5 )(Mn 0.5 Fe 0.5 O3 is mixed with 2% Ag2O and 2wt% graphene to form a homogeneous mixture, thus obtaining perovskite material.

[0103] Example 19: Adding 5% perovskite material (La) to nano-titanium oxide powder 0.5 Sr 0.5 )(Mn 0.45 Fe 0.45 Cu 0.1 The manufacturing method of this perovskite material is as follows: (O3 + 2% Ag2O + 2% graphene).

[0104] La₂O₃, SrCO₃, MnO₂, Fe₂O₃, and CuO were mixed in a certain proportion to prepare (La 0.5 Sr 0.5 )(Mn 0.45 Fe 0.45 Cu 0.1 O3, after being ball-milled and sieved, was calcined at 1200℃ for 2 hours to form a complete perovskite structure. Then, 96wt% (La) 0.5 Sr 0.5 )(Mn 0.45 Fe 0.45 Cu 0.1 O3 is mixed with 2% Ag2O and 2wt% graphene to form a homogeneous mixture, thus obtaining perovskite material.

[0105] The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be used to limit the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A nano-titanium oxide-based photocatalytic bactericidal multi-component material, characterized in that: It includes nano-titanium oxide material, perovskite material and modifier, wherein the nano-titanium oxide material has a composition of 85%-98%, the perovskite material has a composition of 2%-15%, and the modifier includes silver, silver oxide and graphene.

2. The nano-titanium oxide-based photocatalytic bactericidal multi-component material according to claim 1, characterized in that: The nano-titanium oxide in the nano-titanium oxide material is anatase nano-titanium oxide.

3. The nano-titanium oxide-based photocatalytic bactericidal multi-component material according to claim 1, characterized in that: The perovskite material has a composition of 4%-7%.

4. The nano-titanium oxide-based photocatalytic bactericidal multi-component material according to claim 3, characterized in that: The perovskite material has a composition of 5%-6%.

5. The nano-titanium oxide-based photocatalytic bactericidal multi-component material according to claim 1, characterized in that: The perovskite material has the general chemical formula ABO3, wherein the element occupying position A is a trivalent or divalent element, and the element occupying position B is a variable valence element.

6. The nano-titanium oxide-based photocatalytic bactericidal multi-component material according to claim 5, characterized in that: Elements occupying position A include La, Y, Ce, Nd, Sr, Ba, and Ca, while elements occupying position B include Co, Fe, Ni, Mn, Cr, and Cu.

7. The nano-titanium oxide-based photocatalytic bactericidal multi-component material according to claim 6, characterized in that: The elements occupying position A are La and Sr, and the composition ratio of La to Sr is 1:

1.

8. The nano-titanium oxide-based photocatalytic bactericidal multi-component material according to claim 6, characterized in that: The elements occupying position B are Mn, Fe, and Cu, with the composition ratio of Mn, Fe, and Cu being 0.45:0.45:0.

1.

9. The nano-titanium oxide-based photocatalytic bactericidal multi-component material according to claim 5, characterized in that: The chemical formula of the perovskite material is La. 0.5 Sr 0.5 Mn 0.45 Fe 0.45 Cu 0.1 O3.

10. A method for preparing the nano-titanium oxide-based photocatalytic bactericidal multi-component material as described in claim 1, characterized in that, Includes the following steps: S1. The raw material powder for making perovskite material is prepared into powder according to the proportion, mixed and dry ball milled, then sieved, and then calcined to obtain a complete perovskite structure phase. Then it is wet ball milled, dried, and sieved to obtain ultrafine powder. S2. The ultrafine powder and the modifier powder are mixed evenly in a certain proportion and then ball-milled to obtain a mixture; S3. Place the mixture in a solvent, add a suspending agent, transfer it to a reaction vessel, and stir continuously until the solvent evaporates to obtain a composite material in which the perovskite material and the modifier are uniformly mixed. S4. Mix the composite material and the nano-titanium oxide material in a certain proportion to obtain a nano-titanium oxide-based photocatalytic bactericidal multi-component material.