A method for preparing recycled Fe2O3@TiO2@MoS2 nano-antibacterial magnetic materials

Abstract

This invention belongs to the field of nanomaterial preparation and sterilization application technology, and relates to a method for preparing and applying a recyclable Fe2O3@TiO2@MoS2 nano-antibacterial magnetic material. Fe2O3 is synthesized using a one-step solvothermal method, and then TiO2 is coated onto the core using mechanical stirring to obtain Fe2O3@TiO2 powder. MoS2 is then hydrothermally synthesized using L-cysteine ​​and sodium molybdate as precursors. The MoS2 and Fe2O3@TiO2 powder are then transferred together into a reactor for high-temperature reaction. After cooling to room temperature, the mixture is washed and dried to obtain the Fe2O3@TiO2@MoS2 nano-antibacterial magnetic material. This nanomaterial exhibits excellent peroxidase-like properties, photocatalytic properties, magnetic recyclability, and antibacterial properties. The preparation method is simple, and the antibacterial effect is good and harmless to the human body. The entire process is green and pollution-free, environmentally friendly, and has broad market prospects.

Description

Technical fields:

[0001] This invention belongs to the field of nanomaterial preparation and performance testing technology, and relates to a method for preparing recyclable Fe2O3@TiO2@MoS2 nano-antibacterial magnetic materials, and their application in sterilization. The Fe2O3@TiO2@MoS2 nano-magnetic materials are prepared by hydrothermal method and mechanical stirring. The enzyme-like properties and photocatalytic properties of Fe2O3@TiO2@MoS2 nano-magnetic materials are used to achieve the purpose of sterilization. The antibacterial effect is good and it is harmless to the human body. Background technology:

[0002] Currently, the importance of water resources to humankind is self-evident; it is one of the most vital resources for human survival and development. However, with the development of industry and the discharge of domestic sewage, water resources have become polluted. In particular, the spread of antibiotic resistance poses a serious threat to global public health, not only posing a huge risk to public health but also placing a heavy burden on the world economy. Therefore, people have made significant contributions to the development of antibiotics. However, with the promotion and abuse of antibiotics, multidrug-resistant bacteria are rampant, urgently requiring new alternatives to eradicate them. In recent years, ROS-based bacterial therapies have received considerable attention, including ·OH, H2O2, and... 1 O2, O 2·- Its strong oxidizing properties can lead to bacterial apoptosis. Nanoparticles, as a class of inorganic nanomaterials with natural enzyme activity, have advantages such as low cost, high stability, and strong durability. In particular, they possess peroxidase-like activity, catalyzing the generation of ·OH from H₂O₂, exhibiting strong antibacterial activity. To enhance the antibacterial effect, nanomaterial composite materials have been developed and designed. These materials can simultaneously undergo different catalytic reactions, exerting multiple catalytic activities to enhance antibacterial activity, and potential synergistic antibacterial mechanisms have been proposed. Molybdenum disulfide (MoS₂) nanomaterials, as an inherent peroxidase-like catalyst, have attracted much attention due to their excellent physical properties and promising applications in photocatalytic reactions.

[0003] Among existing technologies, photocatalysis has advantages such as low cost, low energy consumption, environmental friendliness, and sustainable development, making it a promising method. Visible light is abundant, readily available, and pollution-free. Effectively utilizing solar energy for photocatalysis is of great significance. Titanium dioxide (TiO2) is an interesting semiconductor material that has been extensively studied for environmental applications due to its chemical inertness, strong oxidizing ability, cost-effectiveness, and long-term stability against photo and chemical corrosion. Its wide bandgap energy (Eg) of 3.0-3.2 eV allows it to absorb ultraviolet light and generate electrons (eg). - ) and holes (h +This provides favorable conditions for redox reactions. To further improve the photocatalytic efficiency of TiO2-based catalysts, numerous efforts have been made, including the use of vacancy engineering, ion doping, and heterojunction methods corresponding to rapid electron-hole separation. One strategy to improve the charge mobility of TiO2 is to use various auxiliary catalysts with exposed two-dimensional MoS2 edges, which possess excellent photocatalytic performance and more catalytic active sites. MoS2 / TiO2 nanocomposites, due to their enormous potential for crystal modification in terms of conductivity, aspect ratio, and ultrathin edges, are among the best candidate materials for promoting superior energy and environmental performance. For example, Chinese patent application CN201910396051.3 discloses a MoS2 / TiO2 composite photocatalyst, which uses a hydrothermal method to prepare MoS2 / TiO2 nano-aerogel composite material. This MoS2 / TiO2 nano-aerogel composite material is then laid on the base layer of an interior decoration project, and after curing, it forms an aerogel layer that can degrade toluene produced indoors under photocatalytic conditions. Chinese patent application CN201811359989.X discloses a method using a solvothermal method to obtain a flower-like Ni-doped MoS2 structure assembled from nanosheets without surfactants or templates. Subsequently, an ultrathin TiO2 layer is coated onto the surface using atomic layer deposition technology to obtain a flower-like Ni-doped MoS2 / TiO2 photocatalyst with excellent catalytic performance, resulting in a Ni-doped material with strong stability and high catalytic activity. The preparation of MoS2 / TiO2 photocatalysts offers high overall controllability. Chinese patent application CN201910455001.8 discloses a method for preparing flower-like MoS2 / TiO2 photocatalysts, comprising the following steps: dissolving ammonium molybdate and thioacetamide in deionized water to obtain a mixed solution; transferring the mixed solution to a hydrothermal reactor, sealing it, and reacting to obtain MoS2; dissolving MoS2 in anhydrous ethanol, adding ammonia solution and tetrabutyl titanate, and reacting at 45–60°C for 22–26 h; centrifuging the reaction product, washing and drying the precipitate, and finally heat-treating it at 500–800°C in an inert atmosphere to obtain the flower-like MoS2 / TiO2 photocatalyst. However, in existing MoS2 / TiO2 materials, because TiO2 is supported in molybdenum disulfide, the band gap of TiO2 is reduced, synergistically extending the photoresponse of TiO2 into the visible range, thus improving photocatalytic activity. Furthermore, the enzyme activity of MoS2 is significantly enhanced due to the binding of MoS2 with TiO2.

[0004] According to the inventors' research, based on summarizing the shortcomings of existing technologies, exploring and developing the recycling and reuse of synthetic nanomaterials and their further applications is of great significance. Traditional separation methods, including centrifugation and filtration, may lead to catalyst loss and energy consumption; separation and collection present another challenge if enzyme activity is to be reused. To solve the current technical problems, it is necessary to find a method for synthesizing nanomaterial biomimetic enzyme precursors. A novel magnetic nanomaterial, Fe2O3@TiO2@MoS2, was prepared through a simple mechanical stirring and solvothermal synthesis method, and this material was made to have significant photocatalytic and enzyme-like activities, providing a new and effective strategy for the treatment of bacteria in wastewater. Summary of the Invention:

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and to provide a method for preparing recyclable Fe2O3@TiO2@MoS2 nano-antibacterial magnetic materials, which can be applied to sterilization. The Fe2O3@TiO2@MoS2 nano-magnetic materials prepared by this invention have peroxidase-like properties and photocatalytic properties. Under visible light irradiation, combined with its enzyme-like properties, it can effectively inhibit bacteria and can be recycled and reused.

[0006] To achieve the above objectives, the specific process steps of the method for preparing the recycled Fe2O3@TiO2@MoS2 nano-antibacterial magnetic material involved in this invention include:

[0007] (1) Preparation of Fe2O3 particles: Fe2O3 was prepared by a one-step solvothermal method using ferric chloride hexahydrate (FeCl3·2H2O) and anhydrous sodium acetate (NaOAC) as iron precursors. The specific process is as follows: 0.54g of FeCl3·2H2O (ferric chloride hexahydrate) and 1.5g of NaOAC (anhydrous sodium acetate) were added to 20 mL of ethylene glycol and placed in a 30 mL reaction vessel. After high-temperature treatment at 200℃ for 5-15 hours, the mixture was cooled to room temperature and centrifuged at 10000 rpm for 5-15 minutes. The precipitate was collected and washed and dried several times with ethanol and distilled water to obtain Fe2O3 particles.

[0008] (2) Preparation of Fe2O3@TiO2: Fe2O3@TiO2 powder is prepared by coating a layer of TiO2 with Fe2O3 particles as the core by mechanical stirring. The specific process is as follows: 60mg of Fe2O3 particles are thoroughly mixed with 0.24ml of deionized water and 60ml of anhydrous ethanol. Then, 200ml of tetrabutyl titanate (TBOT) and 10ml of anhydrous ethanol are introduced at 70-105℃. After mechanical stirring for 60-120 minutes, the mixture is washed and dried with distilled water and ethanol. Then, it is calcined in air in a tube furnace at 300-600℃ for 1-4 hours at a heating rate of 3℃ / min to obtain Fe2O3@TiO2 powder.

[0009] (3) Preparation of Fe2O3@TiO2@MoS2: MoS2 was hydrothermally synthesized using L-cysteine ​​and sodium molybdate as precursors. Specifically, 0.1g of sodium molybdate dihydrate (Na2MoO4·2H2O) and 0.1g of L-cysteine ​​were stirred in 50ml of deionized water for 10-50 minutes to obtain MoS2. Then, MoS2 and 20mg of Fe2O3@TiO2 powder were transferred into a 100ml reaction vessel and kept at 200℃ for 10-30 hours. After cooling to room temperature, the mixture was washed and dried with ethanol and distilled water to obtain Fe2O3@TiO2@MoS2 nano antibacterial magnetic material.

[0010] The Fe2O3@TiO2@MoS2 nano-antibacterial magnetic material of this invention is composed of MoS2 in the shape of nanoflowers and Fe2O3@TiO2 in the shape of nanospheres. It has excellent magnetic properties and is recyclable.

[0011] The Fe2O3@TiO2@MoS2 nano-antibacterial magnetic material described in this invention has peroxidase activity, which enables it to catalyze the generation of hydroxyl radicals from hydrogen peroxide, thereby more effectively inhibiting bacteria.

[0012] The Fe2O3@TiO2@MoS2 nano-antibacterial magnetic material described in this invention has a wide absorption range in the visible light region and exhibits excellent photocatalytic properties.

[0013] The present invention also provides the application of the Fe2O3@TiO2@MoS2 nano antibacterial magnetic material as an antibacterial material, specifically the application of the Fe2O3@TiO2@MoS2 nano antibacterial magnetic material in inhibiting bacteria in the aquatic environment and its magnetic recycling and reuse.

[0014] The Fe2O3@TiO2@MoS2 nano-antibacterial magnetic material prepared by this invention can serve as a multifunctional material, possessing both peroxidase activity and photocatalytic properties, as well as excellent magnetic recyclability. Furthermore, the photothermal effect after visible light irradiation allows it to reach temperatures near its optimal enzyme-like activity, resulting in a better enzyme-like state. Photocatalysis offers advantages such as low cost, low energy consumption, environmental friendliness, and sustainable development. Therefore, utilizing the photocatalytic properties and enzyme-like antibacterial properties of the Fe2O3@TiO2@MoS2 nano-antibacterial magnetic material has promising development and application prospects.

[0015] Compared with existing technologies, the Fe2O3@TiO2@MoS2 nano-antibacterial magnetic material prepared by this invention has high catalytic activity, can be stored for a long time, and has advantages such as high tolerance to harsh environments, high stability, and adjustable catalytic activity. The product has excellent peroxidase-like activity, photocatalytic properties, and antibacterial performance. Its preparation process is simple, the equipment is readily available, the preparation process is green and pollution-free, and it has good antibacterial effect, is harmless to the human body, can be recycled and reused, is environmentally friendly, and has broad market prospects. Attached image description:

[0016] Figure 1 This is a schematic diagram of the antibacterial mechanism of the Fe2O3@TiO2@MoS2 nano-antibacterial magnetic material involved in this invention.

[0017] Figure 2 The images shown are scanning electron microscope (SEM) images of the Fe2O3@TiO2@MoS2 nano-antibacterial magnetic materials involved in this invention, where A represents Fe2O3, B represents Fe2O3@TiO2, and C represents Fe2O3@TiO2@MoS2.

[0018] Figure 3 The images show the X-ray diffraction pattern and X-ray photoelectron spectroscopy pattern of the Fe2O3@TiO2@MoS2 nano-antibacterial magnetic material involved in this invention, where A is the X-ray diffraction pattern and B is the X-ray photoelectron spectroscopy pattern.

[0019] Figure 4 This is a schematic diagram illustrating the peroxidase-like activity characterization of the Fe2O3@TiO2@MoS2 nano-antibacterial magnetic material involved in this invention.

[0020] Figure 5 The image shows the electron paramagnetic resonance (EPR) pattern of the Fe2O3@TiO2@MoS2 nano-antibacterial magnetic material involved in this invention.

[0021] Figure 6 This is a schematic diagram illustrating the experimental results of the antibacterial effects of Fe2O3@TiO2@MoS2 nano-antibacterial magnetic materials of the present invention on drug-resistant Escherichia coli and drug-resistant Staphylococcus aureus after different treatments.

[0022] Figure 7 This is a schematic diagram of the MTT cytotoxicity test results for the Fe2O3@TiO2@MoS2 nano-antibacterial magnetic material of the present invention.

[0023] Figure 8 This invention relates to Fe2O3@TiO2@MoS2 nano-antibacterial magnetic materials for magnetic and antibacterial cycle experiments, wherein A is a comparison of hysteresis loops after initial, second and third experiments, and B is a comparison of the antibacterial effects of Fe2O3@TiO2@MoS2+H2O2+Vis three times. Detailed implementation method:

[0024] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0025] Example 1:

[0026] This embodiment relates to a method for preparing a recyclable Fe2O3@TiO2@MoS2 nano-antibacterial magnetic material, the specific process steps of which are as follows:

[0027] (I) Preparation of Fe2O3: Fe2O3 was prepared by a one-step solvothermal method using ferric chloride hexahydrate (FeCl3·2H2O) and anhydrous sodium acetate (NaOAC) as iron precursors. The specific steps are as follows:

[0028] (1) Weigh 0.54g FeCl3·2H2O and 1.5g NaOAC accurately using an electronic balance, place them in a 30ml reaction vessel, add 20ml ethylene glycol, and stir thoroughly to disperse them evenly;

[0029] (2) The reactor was placed in an oven and subjected to high-temperature treatment at 200°C for 10 hours, and then cooled to room temperature.

[0030] (3) Take out the sample and centrifuge it at 10,000 speed for 10 minutes. Collect the precipitate, wash it with ethanol and distilled water several times and dry it to obtain Fe2O3.

[0031] (II) Preparation of Fe2O3@TiO2: Fe2O3@TiO2 powder is prepared by coating Fe2O3 particles with a layer of TiO2 through mechanical stirring; specifically:

[0032] (1) Accurately weigh 60 mg of Fe2O3 particles with an electronic balance, mix them thoroughly with 0.24 mL of deionized water and 60 mL of anhydrous ethanol, and then introduce 200 mL of tetrabutyl titanate (TBOT) and 10 mL of anhydrous ethanol at 85 °C and mechanically stir for 90 minutes.

[0033] (2) After washing and drying the sample with distilled water and ethanol, it was calcined in air in a tube furnace at 450°C for 2 hours at a rate of 3°C / min to obtain Fe2O3@TiO2;

[0034] (III) Preparation of Fe2O3@TiO2@MoS2:

[0035] (1) MoS2 was hydrothermally synthesized using L-cysteine ​​and sodium molybdate as precursors. Specifically, 0.1 g of sodium molybdate dihydrate (Na2MoO4·2H2O) and 0.1 g of L-cysteine ​​were accurately weighed using an electronic balance and added to 50 mL of deionized water. The mixture was stirred for 30 minutes to obtain MoS2. Then, MoS2 and 20 mg of Fe2O3@TiO2 powder were transferred to a 100 mL reaction vessel and kept at 200 °C for 20 hours.

[0036] (2) After cooling to room temperature, the Fe2O3@TiO2@MoS2 nano antibacterial magnetic material was obtained by washing and drying with ethanol and distilled water.

[0037] In this embodiment, the unique properties of Fe2O3@TiO2@MoS2 were characterized using scanning electron microscopy (SEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The prepared Fe2O3@TiO2@MoS2 antibacterial nanomaterials were characterized using electron spin resonance (EPR) and peroxidase activity assays. The characterization results are as follows: Figures 2-5 As shown.

[0038] from Figure 2 As can be seen from the SEM image, Figure 2 In sample A, Fe2O3 was observed to be spherical with an average size of 200-300 nm. Figure 2 The Fe2O3@TiO2 shown in B is still a nanosphere with an average size of 200-300 nm. Figure 2 As shown in Figure C, there are a large number of Fe2O3@TiO2 nanospheres between the nanoflower-like MoS2 sheets, which represents the complete morphology of Fe2O3@TiO2@MoS2.

[0039] from Figure 3 The XRD and XPS images show that the material contains Fe, Ti, Mo, S and O elements, and contains different valence states, which is conducive to electron transfer and the generation of free radicals.

[0040] from Figure 4 The peroxidase activity diagram shows that the composite material has peroxidase-like activity and can catalyze the generation of hydroxyl radicals from hydrogen peroxide.

[0041] from Figure 5 The EPR spectrum shows that the ratio of each peak is 1:2:2:1, indicating that the material can generate free radicals after being irradiated with visible light, and the type of free radical is hydroxyl radical.

[0042] Example 2:

[0043] This embodiment relates to the application experiment of Fe2O3@TiO2@MoS2 nanomagnetic antibacterial material in aquatic environment antibacterial activity. The Fe2O3@TiO2@MoS2 nanomagnetic antibacterial material solution prepared in Example 1 was applied to the aquatic environment antibacterial experiment. Single colonies of drug-resistant bacteria (drug-resistant Escherichia coli and drug-resistant Staphylococcus aureus) from solid LB medium were inoculated into 50 mL of sterile liquid LB medium containing tryptone (0.5 g), yeast extract (0.25 g), and NaCl (0.5 g). The suspension of drug-resistant bacteria was then placed on a rotary shaker and cultured overnight at 37°C at 150 rpm / min. Subsequently, the bacteria were diluted to 10⁻¹⁰ with sterile physiological saline. 7 CFU / mL was used to obtain the bacterial culture. Fe2O3@TiO2@MoS2 (final concentration 100 μg / mL Fe2O3@TiO2@MoS2) and 50 μmol H2O2 were added. The mixture was irradiated with visible light for 10 minutes and incubated at 37°C for 30 minutes. Then, 100 μL of the mixed solution was evenly spread onto a solid culture medium. The solid culture medium was then incubated at 37°C for 18 hours. The bacterial colony count was performed using the CFU method. Sterile physiological saline was used as a blank control. Parallel control experiments were conducted with bacteria alone and with either H2O2 or Fe2O3@TiO2@MoS2 nanomagnetic antibacterial material. The experiments were performed in the dark as described above. The experimental results are as follows: Figure 6 As shown. From Figure 6 It can be seen that when H2O2 and Fe2O3@TiO2@MoS2 nanomagnetic antibacterial materials are added simultaneously under visible light irradiation, there are very few bacterial colonies in the plate. The antibacterial rate against drug-resistant Escherichia coli and drug-resistant Staphylococcus aureus is 99%, indicating that Fe2O3@TiO2@MoS2 nanomagnetic antibacterial materials have extremely strong antibacterial properties in the presence of visible light and H2O2.

[0044] Example 3:

[0045] This example demonstrates the application of Fe2O3@TiO2@MoS2 nanomagnetic antibacterial materials in biotoxicity testing. Mouse L929 cells were used in the experiment. L929 cells were cultured in RPMI 1640 medium containing 1% penicillin-streptomycin (Gibco) and 10% fetal bovine serum at 37°C. L929 cells were incubated in 96-well plates at a density of 5 × 10³ cells / well for 12 hours using CO2. All experiments were performed at a cell concentration of 70%–80%. Then, the 96-well plates were treated with aqueous solutions of Fe₂O₃@TiO₂@MoS₂ nanomagnetic antibacterial material at different concentrations (0 μg / mL, 40 μg / mL, 60 μg / mL, 80 μg / mL, 100 μg / mL, 120 μg / mL, 140 μg / mL, 160 μg / mL, 180 μg / mL, 200 μg / mL) at 37°C for 24 hours. Finally, 10 μL of dimethyl sulfoxide (DMSO) was added to each well for an additional 4 hours of incubation, and absorbance values ​​were collected on a 490 nm microplate reader. Cell viability without incubation with the Fe₂O₃@TiO₂@MoS₂ nanomagnetic antibacterial material aqueous solution was set as 100%, and the results are as follows. Figure 7 As shown, the results indicate that L929 cells at 200 μg / mL -1 At certain concentrations, the survival rate decreased slightly but remained around 90%. In conclusion, Fe2O3@TiO2@MoS2 has no significant impact on the normal life activities of organisms, promotes wastewater treatment without damaging the biological environment, and has a significant advantage in terms of biocompatibility.

[0046] Example 4:

[0047] This embodiment is an application experiment demonstrating the stability of Fe2O3@TiO2@MoS2 nanomagnetic antibacterial materials in practical applications.

[0048] To achieve magnetic recyclability, multiple cyclic experiments were conducted on the same batch of Fe2O3@TiO2@MoS2. Fe2O3@TiO2@MoS2 that had undergone one wastewater treatment was centrifuged at 3000 rpm for 5 minutes to remove bacteria and other impurities. This process was repeated three times. After centrifugation and washing with deionized water, magnetic cleaning was performed again. Finally, the precipitate was dried, and wastewater was treated again. The wastewater was then subjected to a plate count method to obtain the corresponding antibacterial effect, thus completing the second repeated experiment. This process was repeated three times to obtain Fe2O3@TiO2@MoS2 after three cycles. Magnetic and antibacterial experiments were conducted using hysteresis loops and the aforementioned visible light antibacterial experiment to evaluate the stability of Fe2O3@TiO2@MoS2. The results are as follows: Figure 8 As shown. From Figure 8As can be seen from A, the saturation magnetization decreased slightly after three cycles, but not significantly, and remained above 19.6 emu / g at the end of the three cycles.

[0049] In addition, the antibacterial results of Fe2O3@TiO2@MoS2 materials (Fe2O3@TiO2@MoS2+H2O2+Vis (visible light)) were compared with those of a single bacterial blank control. Figure 8 B shows the comparison of antibacterial results. As can be clearly seen from the figure, the material still exhibits excellent antibacterial effects after three reuses, maintaining an inhibition rate of over 99% against Escherichia coli and reaching 98.8% against MRSA (Methicillin-resistant Staphylococcus aureus). In conclusion, the Fe2O3@TiO2@MoS2 composite material can be magnetically recovered and reused for bacterial treatment in wastewater.

Claims

1. A method for preparing a recyclable Fe2O3@TiO2@MoS2 nano-antibacterial magnetic material, characterized in that, The specific steps include: (1) Preparation of Fe2O3: Fe2O3 particles were prepared by one-step solvothermal method using FeCl3•2H2O and NaOAC as iron precursors; (2) Preparation of Fe2O3@TiO2: Fe2O3@TiO2 powder is prepared by coating a layer of TiO2 with Fe2O3 particles as the core by mechanical stirring. The specific process of step (2) is as follows: Fe2O3 particles are thoroughly mixed with deionized water and anhydrous ethanol, and a mixture of tetrabutyl titanate and anhydrous ethanol is introduced at 70-105℃. After mechanical stirring for 60-120 minutes, the mixture is washed and dried with distilled water and ethanol, and then calcined in air in a tube furnace at 300-600℃ for 1-4 hours to obtain Fe2O3@TiO2 powder. (3) Preparation of Fe2O3@TiO2@MoS2: MoS2 was hydrothermally synthesized using L-cysteine ​​and sodium molybdate as precursors. The MoS2 and Fe2O3@TiO2 powder were then transferred into a reaction vessel and kept at 200℃ for 10-30 hours. After cooling to room temperature, the mixture was washed and dried to obtain Fe2O3@TiO2@MoS2 nano antibacterial magnetic material.

2. The preparation method of the reclaimed Fe2O3@TiO2@MoS2 nano-antibacterial magnetic material according to claim 1, characterized in that, The specific process of step (1) is as follows: FeCl3•2H2O and NaOAC are added to ethylene glycol and then placed in a reaction vessel; after high temperature treatment at 200°C for 5-15 h, the mixture is cooled to room temperature, centrifuged, and the precipitate is collected. It is then washed and dried several times with ethanol and distilled water to obtain Fe2O3 particles.

3. The preparation method of the reclaimed Fe2O3@TiO2@MoS2 nano-antibacterial magnetic material according to claim 1, characterized in that, The Fe2O3@TiO2@MoS2 nanomaterial is composed of MoS2 and Fe2O3@TiO2 nanospheres in the shape of nanoflowers and has magnetic and recyclable properties.

4. The preparation method of the reclaimed Fe2O3@TiO2@MoS2 nano-antibacterial magnetic material according to claim 1, characterized in that, Fe2O3@TiO2@MoS2 nanomaterials possess peroxidase activity, which can catalyze the generation of hydroxyl radicals from hydrogen peroxide, thereby inhibiting bacteria.

5. The preparation method of the reclaimed Fe2O3@TiO2@MoS2 nano-antibacterial magnetic material according to claim 1, characterized in that, Fe2O3@TiO2@MoS2 nanomaterials exhibit absorption in the visible light region and possess photocatalytic properties.

6. A Fe2O3@TiO2@MoS2 nanomaterial prepared by the method as described in claim 1.

7. An application of the Fe2O3@TiO2@MoS2 nanomaterial as described in claim 6 as an antibacterial material.

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