CN113498791A - Ag@Fe3O4@SiC/TiO2Synthesis method and application of nano material - Google Patents
Ag@Fe3O4@SiC/TiO2Synthesis method and application of nano material Download PDFInfo
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Abstract
The invention relates to Ag @ Fe3O4@SiC/TiO2A method for synthesizing nano material and its application. The synthesis method comprises the following steps: A. uniformly mixing SiC, the single-arm carbon nanotube and graphene to obtain a silicon carbide substrate material; B. taking Fe3O4Magnetic nanoparticles dispersed in ethanol to Fe3O4Adding ethanol into the ethanol dispersion liquid, then adding deionized water and concentrated ammonia solution, performing ultrasonic treatment, adding a silicon carbide substrate material, continuously stirring at room temperature, and washing to obtain Fe3O4@ SiC; C. mixing Fe3O4@ SiC and AgNO3The solution is mixed inAnd dropping sodium hydroxide solution while stirring to obtain a precipitate a, washing the precipitate a to be neutral to obtain deionized water dispersion liquid of the precipitate a, dropping sodium borohydride solution into the dispersion liquid while stirring, filtering to obtain a precipitate b, and washing the precipitate b to be neutral by using deionized water to obtain the catalyst. Ag @ Fe prepared by the method3O4@SiC/TiO2The nano material has excellent infrared photo-thermal antibacterial performance.
Description
Technical Field
The invention relates to the field of novel antibacterial materials, in particular to Ag @ Fe3O4@SiC/TiO2A synthesis method of nano material and an infrared photo-thermal antibacterial application.
Background
At present, the removal of bacteriostatic materials indoors or in a vehicle mainly uses a chemical method for sterilization, such as chlorine dioxide sterilization; or a method of sterilizing using ultraviolet rays. These methods have some problems. For example, chlorine dioxide disinfection is a low toxicity chemical oxidation process, but still has an effect on the human respiratory tract. And use ultraviolet sterilization, the ultraviolet ray has certain injury to the human body at first, and secondly if use ultraviolet sterilization can have great influence to car interior trim in the car, consequently, need develop a novel antibacterial material, when inhibiting the bacterium and growing in object surface and air, possess better security.
Disclosure of Invention
The invention aims to provide Ag @ Fe3O4@SiC/TiO2A synthesis method of a nano material and application thereof in infrared photo-thermal bacteriostasis.
The Ag @ Fe3O4@SiC/TiO2The synthesis method of the nano material comprises the following steps:
A. uniformly mixing 1 weight part of SiC, 0-1 weight part of single-arm carbon nanotube and 0-1 weight part of graphene to obtain a silicon carbide substrate material:
B. taking Fe3O4Magnetic nanoparticles dispersed in ethanol to obtain Fe3O4Ethanol dispersion to Fe3O4Adding ethanol into the ethanol dispersion liquid, then adding deionized water and a concentrated ammonia solution, uniformly mixing, performing ultrasonic treatment for 10-60 minutes, adding the silicon carbide substrate material prepared in the step A, continuously stirring for 5-20 hours at room temperature, filtering, washing precipitates with the deionized water and the ethanol respectively, and filtering to obtain Fe3O4@SiC；
C. Mixing Fe3O4@ SiC and AgNO3Mixing the solutions, dropwise adding a sodium hydroxide solution under stirring to obtain a precipitate a, washing the precipitate a to be neutral by using deionized water, retaining water washed for the last time to obtain deionized water dispersion liquid of the precipitate a, dropwise adding a sodium borohydride solution into the dispersion liquid under stirring, filtering to obtain a precipitate b, washing the precipitate b to be neutral by using the deionized water to obtain Ag @ Fe3O4@SiC/TiO2And (3) nano materials.
Said Fe3O4The preparation method of the magnetic nanoparticles comprises the following steps:
taking FeCl3Dissolving trisodium citrate and sodium acetate in ethylene glycol, stirring uniformly to obtain a yellow solution, transferring the yellow solution into a high-pressure reaction kettle, reacting for 6-20h under a sealing body at 160-240 ℃, cooling to room temperature, and filtering to obtain Fe3O4Magnetic nanoparticles.
The FeCl3With FeCl3·6H2In the O form, FeCl3·6H2The weight ratio of O, trisodium citrate, sodium acetate and glycol is as follows: 1-5:1-2:4-8: 100-130.
In the step B, the Fe3O4In an ethanol dispersion, Fe3O4The content of (A) is 0.01-0.1 g/mL; said Fe3O4The weight ratio of the ethanol dispersion liquid to the ethanol to the deionized water to the concentrated ammonia solution to the silicon carbide substrate material is 1-3:180-280:50-90: 2-5: 1.
the concentrated ammonia solution is 25-28% concentrated ammonia water.
In the step C, Fe3O4@SiC、AgNO3The weight ratio of the solution to the sodium hydroxide solution is as follows: 1-10:100: 100; wherein, AgNO3The concentration of the solution is 0.08-0.15g/mL, and the weight percentage concentration of the sodium hydroxide solution is 0.8-1.5%.
In the step C, the weight of the sodium borohydride solution and AgNO are dripped into the deionized water dispersion liquid of the precipitate a3The weight of the solution is consistent; wherein, the weight percentage of the sodium borohydride solution is 2-6%.
Ag @ Fe prepared by the method3O4@SiC/TiO2The application of the nano material in infrared photo-thermal bacteriostasis.
The Ag @ Fe3O4@ SiC/TiO2 nano material prepared by the method has excellent infrared photo-thermal antibacterial performance. The bacteriostasis experiment of the embodiment 7 of the invention shows that the bacteriostasis rate of the compound preparation on escherichia coli represented by gram-negative bacteria reaches more than 99 percent, the bacteriostasis rate on staphylococcus aureus represented by gram-positive bacteria reaches more than 99 percent, and the bacteriostasis rate on mould represented by aspergillus niger is more than 90 percent.
Drawings
FIG. 1 is a diagram of an Aspergillus niger bacteria inhibition experiment in an embodiment of the present invention;
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and examples.
Example 1
The Ag @ Fe3O4@SiC/TiO2The synthesis method of the nano material comprises the following steps:
A. taking 1kg of SiC to obtain a silicon carbide substrate material:
B. taking Fe3O4Magnetic nanoparticles dispersed in ethanol to obtain Fe3O4Ethanol dispersion to Fe3O4Adding ethanol into the ethanol dispersion liquid, then adding deionized water and a concentrated ammonia solution with the weight percentage concentration of 25%, uniformly mixing, carrying out ultrasonic treatment for 10 minutes, adding the silicon carbide substrate material prepared in the step A, continuously stirring for 5 hours at room temperature, filtering, washing precipitates with the deionized water and the ethanol respectively, and filtering to obtain Fe3O4@SiC；
Said Fe3O4In an ethanol dispersion, Fe3O4The content of (A) is 0.01 g/mL; said Fe3O4The weight ratio of the ethanol dispersion liquid to the ethanol to the deionized water to the concentrated ammonia solution to the silicon carbide substrate material is 1:180:50: 2: 1;
said Fe3O4The preparation method of the magnetic nanoparticles comprises the following steps: taking FeCl3Dissolving trisodium citrate and sodium acetate in ethylene glycol, stirring to obtain yellow solution, transferring the yellow solution into a high-pressure reaction kettle, reacting at 160 deg.C for 6h in a sealed body, cooling to room temperature, and filtering to obtain Fe3O4Magnetic nanoparticles;
wherein, the FeCl3With FeCl3·6H2In the O form, FeCl3·6H2The weight ratio of O, trisodium citrate, sodium acetate and glycol is as follows: 1:1:4: 100, respectively;
C. mixing Fe3O4@ SiC with 0.08g/mL AgNO3Mixing the solutions, dropwise adding sodium hydroxide solution with weight percentage concentration of 0.8-1.5% under stirring to obtain precipitate a, washing with deionized water to neutrality, retaining the water of the last washing to obtain deionized water dispersion of precipitate a, and dropwise adding AgNO into the dispersion under stirring3Sodium borohydride solution with the weight percentage content of 2 percent and consistent weight of the solution is filtered to obtain precipitate b, and the precipitate b is washed to be neutral by deionized water to obtain Ag @ Fe3O4@SiC/TiO2A nanomaterial; wherein, Fe3O4@SiC、AgNO3The weight ratio of the solution to the sodium hydroxide solution is as follows: 1:100:100.
Example 2
The Ag @ Fe3O4@SiC/TiO2The synthesis method of the nano material comprises the following steps:
A. taking 1kg of SiC, 1kg of single-arm carbon nanotube and 1kg of graphene, and uniformly mixing to obtain a silicon carbide substrate material:
B. taking Fe3O4Magnetic nanoparticles dispersed in ethanol to obtain Fe3O4Ethanol dispersion to Fe3O4Adding ethanol into the ethanol dispersion liquid, then adding deionized water and a concentrated ammonia solution with the weight percentage concentration of 28%, uniformly mixing, carrying out ultrasonic treatment for 60 minutes, adding the silicon carbide substrate material prepared in the step A, continuously stirring for 20 hours at room temperature, filtering, washing precipitates with the deionized water and the ethanol respectively, and filtering to obtain Fe3O4@SiC；
Said Fe3O4In an ethanol dispersion, Fe3O4The content of (A) is 0.1 g/mL; said Fe3O4The weight ratio of the ethanol dispersion liquid to the ethanol to the deionized water to the concentrated ammonia solution to the silicon carbide substrate material is 3:280:90: 5: 1;
said Fe3O4The preparation method of the magnetic nano-particles comprisesThe method comprises the following steps: taking FeCl3Dissolving trisodium citrate and sodium acetate in ethylene glycol, stirring to obtain yellow solution, transferring the yellow solution into a high-pressure reaction kettle, reacting at 240 deg.C for 20h in a sealed state, cooling to room temperature, and filtering to obtain Fe3O4Magnetic nanoparticles;
wherein, the FeCl3With FeCl3·6H2In the O form, FeCl3·6H2The weight ratio of O, trisodium citrate, sodium acetate and glycol is as follows: 5:2:8: 130, 130;
C. mixing Fe3O4@ SiC with 0.15g/mL AgNO3Mixing the solutions, dropwise adding sodium hydroxide solution with the weight percentage concentration of 1.5% under stirring to obtain precipitate a, washing the precipitate a to be neutral by using deionized water, reserving water for the last washing to obtain deionized water dispersion liquid of the precipitate a, and dropwise adding AgNO into the dispersion liquid under stirring3Sodium borohydride solution with the weight percentage content of 6 percent and consistent weight of the solution is filtered to obtain precipitate b, and the precipitate b is washed to be neutral by deionized water to obtain Ag @ Fe3O4@SiC/TiO2A nanomaterial; wherein, Fe3O4@SiC、AgNO3The weight ratio of the solution to the sodium hydroxide solution is as follows: 10:100:100.
Example 3
The Ag @ Fe3O4@SiC/TiO2The synthesis method of the nano material comprises the following steps:
A. 1kg of SiC, 0.5kg of single-arm carbon nano tube and 0.5kg of graphene are uniformly mixed to obtain the silicon carbide substrate material:
B. taking Fe3O4Magnetic nanoparticles dispersed in ethanol to obtain Fe3O4Ethanol dispersion to Fe3O4Adding ethanol into the ethanol dispersion liquid, then adding deionized water and a concentrated ammonia solution with the weight percentage concentration of 26%, uniformly mixing, carrying out ultrasonic treatment for 40 minutes, adding the silicon carbide substrate material prepared in the step A, continuously stirring for 10 hours at room temperature, filtering, washing precipitates with the deionized water and the ethanol respectively, and filtering to obtain Fe3O4@SiC；
Said Fe3O4In an ethanol dispersion, Fe3O4The content of (A) is 0.5 g/mL; said Fe3O4The weight ratio of the ethanol dispersion liquid to the ethanol to the deionized water to the concentrated ammonia solution to the silicon carbide substrate material is 2:240:70: 3: 1;
said Fe3O4The preparation method of the magnetic nanoparticles comprises the following steps: taking FeCl3Dissolving trisodium citrate and sodium acetate in ethylene glycol, stirring to obtain yellow solution, transferring the yellow solution into a high-pressure reaction kettle, reacting at 180 deg.C for 12h in a sealed state, cooling to room temperature, and filtering to obtain Fe3O4Magnetic nanoparticles;
wherein, the FeCl3With FeCl3·6H2In the O form, FeCl3·6H2The weight ratio of O, trisodium citrate, sodium acetate and glycol is as follows: 3:1.5:6: 110;
C. mixing Fe3O4@ SiC with 0.12g/mL AgNO3Mixing the solutions, dropwise adding sodium hydroxide solution with the weight percentage concentration of 1.2% under stirring to obtain precipitate a, washing the precipitate a to be neutral by using deionized water, reserving water for the last washing to obtain deionized water dispersion liquid of the precipitate a, and dropwise adding AgNO into the dispersion liquid under stirring3Sodium borohydride solution with the weight percentage content of 4 percent and consistent weight of the solution is filtered to obtain precipitate b, and the precipitate b is washed to be neutral by deionized water to obtain Ag @ Fe3O4@SiC/TiO2A nanomaterial; wherein, Fe3O4@SiC、AgNO3The weight ratio of the solution to the sodium hydroxide solution is as follows: 6:100:100.
Example 4
The Ag @ Fe3O4@SiC/TiO2The synthesis method of the nano material comprises the following steps:
A. taking 1kg of SiC and 1kg of graphene, and uniformly mixing to obtain a silicon carbide substrate material:
B. taking Fe3O4Magnetic nanoparticles dispersed in ethanolIn the presence of iron to obtain Fe3O4Ethanol dispersion to Fe3O4Adding ethanol into the ethanol dispersion liquid, then adding deionized water and a concentrated ammonia solution with the weight percentage concentration of 28%, uniformly mixing, carrying out ultrasonic treatment for 20 minutes, adding the silicon carbide substrate material prepared in the step A, continuously stirring for 15 hours at room temperature, filtering, washing precipitates with the deionized water and the ethanol respectively, and filtering to obtain Fe3O4@SiC；
Said Fe3O4In an ethanol dispersion, Fe3O4The content of (A) is 0.07 g/mL; said Fe3O4The weight ratio of the ethanol dispersion liquid to the ethanol to the deionized water to the concentrated ammonia solution to the silicon carbide substrate material is 1:260:60: 4: 1;
said Fe3O4The preparation method of the magnetic nanoparticles comprises the following steps: taking FeCl3Dissolving trisodium citrate and sodium acetate in ethylene glycol, stirring to obtain yellow solution, transferring the yellow solution into a high-pressure reaction kettle, reacting at 200 deg.C for 13h in a sealed state, cooling to room temperature, and filtering to obtain Fe3O4Magnetic nanoparticles;
wherein, the FeCl3With FeCl3·6H2In the O form, FeCl3·6H2The weight ratio of O, trisodium citrate, sodium acetate and glycol is as follows: 4:2:4: 100, respectively;
C. mixing Fe3O4@ SiC with 0.14g/mL AgNO3Mixing the solutions, dropwise adding sodium hydroxide solution with weight percentage concentration of 0.9% under stirring to obtain precipitate a, washing with deionized water to neutrality, retaining water of the last washing to obtain deionized water dispersion of precipitate a, and dropwise adding AgNO into the dispersion under stirring3Sodium borohydride solution with the consistent weight percentage content of 5 percent is filtered to obtain precipitate b, and the precipitate b is washed to be neutral by deionized water to obtain Ag @ Fe3O4@SiC/TiO2A nanomaterial; wherein, Fe3O4@SiC、AgNO3The weight ratio of the solution to the sodium hydroxide solution is as follows: 3:100:100.
Example 5
The Ag @ Fe3O4@SiC/TiO2The synthesis method of the nano material comprises the following steps:
A. taking 1kg of SiC and 0.7kg of single-arm carbon nano tube, and uniformly mixing to obtain the silicon carbide substrate material:
B. taking Fe3O4Magnetic nanoparticles dispersed in ethanol to obtain Fe3O4Ethanol dispersion to Fe3O4Adding ethanol into the ethanol dispersion liquid, then adding deionized water and a concentrated ammonia solution with the weight percentage concentration of 26%, uniformly mixing, carrying out ultrasonic treatment for 50 minutes, adding the silicon carbide substrate material prepared in the step A, continuously stirring for 17 hours at room temperature, filtering, washing precipitates with the deionized water and the ethanol respectively, and filtering to obtain Fe3O4@SiC；
Said Fe3O4In an ethanol dispersion, Fe3O4The content of (A) is 0.8 g/mL; said Fe3O4The weight ratio of the ethanol dispersion liquid to the ethanol to the deionized water to the concentrated ammonia solution to the silicon carbide substrate material is 1:200:60: 5: 1;
said Fe3O4The preparation method of the magnetic nanoparticles comprises the following steps: taking FeCl3Dissolving trisodium citrate and sodium acetate in ethylene glycol, stirring uniformly to obtain a yellow solution, transferring the yellow solution into a high-pressure reaction kettle, reacting for 6-20h under a sealing body at 160-240 ℃, cooling to room temperature, and filtering to obtain Fe3O4Magnetic nanoparticles;
wherein, the FeCl3With FeCl3·6H2In the O form, FeCl3·6H2The weight ratio of O, trisodium citrate, sodium acetate and glycol is as follows: 1:2:7: 110;
C. mixing Fe3O4@ SiC with 0.11g/mL AgNO3Mixing the solutions, dropwise adding sodium hydroxide solution with the weight percentage concentration of 1.1% under stirring to obtain a precipitate a, washing the precipitate a to be neutral by using deionized water, reserving water for the last washing to obtain deionized water dispersion liquid of the precipitate a,adding AgNO dropwise into the dispersion under stirring3Sodium borohydride solution with the consistent weight percentage content of 5 percent is filtered to obtain precipitate b, and the precipitate b is washed to be neutral by deionized water to obtain Ag @ Fe3O4@SiC/TiO2A nanomaterial; wherein, Fe3O4@SiC、AgNO3The weight ratio of the solution to the sodium hydroxide solution is as follows: 2:100:100.
Example 6
The Ag @ Fe3O4@SiC/TiO2The synthesis method of the nano material comprises the following steps:
A. 1kg of SiC, 0.4kg of single-arm carbon nano tube and 0.6kg of graphene are uniformly mixed to obtain the silicon carbide substrate material:
B. taking Fe3O4Magnetic nanoparticles dispersed in ethanol to obtain Fe3O4Ethanol dispersion to Fe3O4Adding ethanol into the ethanol dispersion liquid, then adding deionized water and a concentrated ammonia solution with the weight percentage concentration of 27%, uniformly mixing, carrying out ultrasonic treatment for 15 minutes, adding the silicon carbide substrate material prepared in the step A, continuously stirring for 10 hours at room temperature, filtering, washing precipitates with the deionized water and the ethanol respectively, and filtering to obtain Fe3O4@SiC；
Said Fe3O4In an ethanol dispersion, Fe3O4The content of (A) is 0.6 g/mL; said Fe3O4The weight ratio of the ethanol dispersion liquid to the ethanol to the deionized water to the concentrated ammonia solution to the silicon carbide substrate material is 2:220:70: 3: 1;
said Fe3O4The preparation method of the magnetic nanoparticles comprises the following steps: taking FeCl3Dissolving trisodium citrate and sodium acetate in ethylene glycol, stirring uniformly to obtain a yellow solution, transferring the yellow solution into a high-pressure reaction kettle, reacting for 6-20h under a sealing body at 160-240 ℃, cooling to room temperature, and filtering to obtain Fe3O4Magnetic nanoparticles;
wherein, the FeCl3With FeCl3·6H2The O-form exists in the presence of,FeCl3·6H2the weight ratio of O, trisodium citrate, sodium acetate and glycol is as follows: 1:2:6: 100, respectively;
C. mixing Fe3O4@ SiC with 0.12g/mL AgNO3Mixing the solutions, dropwise adding sodium hydroxide solution with the weight percentage concentration of 1.1% under stirring to obtain precipitate a, washing the precipitate a to be neutral by using deionized water, reserving water for the last washing to obtain deionized water dispersion liquid of the precipitate a, and dropwise adding AgNO into the dispersion liquid under stirring3Sodium borohydride solution with the weight percentage content of 4 percent and consistent weight of the solution is filtered to obtain precipitate b, and the precipitate b is washed to be neutral by deionized water to obtain Ag @ Fe3O4@SiC/TiO2A nanomaterial; wherein, Fe3O4@SiC、AgNO3The weight ratio of the solution to the sodium hydroxide solution is as follows: 8:100:100.
Example 7:
escherichia coli
1. Experiment grouping
Escherichia coli
1. Experiment grouping
Experimental group 2: to 1ml of 1.0X 103cfu/ml of Escherichia coli solution, 1% by weight of the photothermal bacteriostatic material of example 3 of the present invention was added.
Blank control group: 1ml of a solution containing 1.0X 103cfu/ml Escherichia coli liquid.
2. Experimental methods and results:
after the blank groups are loaded, 20ul of the blank groups are irradiated by infrared light (with the wavelength of 818nm) and taken from each group at corresponding time, the blank groups are injected into a culture dish and mixed evenly, and the blank groups are cultured for 24 hours at the temperature of 37 ℃, wherein the culture medium is LB culture medium.
It can be seen that experiment group 2 and experiment group 3 using the nano material of the invention have obvious effect of inhibiting escherichia coli by light and heat compared with the blank control group, and escherichia coli can be completely killed 10min after the nano material is added.
Second, Staphylococcus aureus
1. Experiment grouping
Experimental group 2: to 1ml of 1.0X 103The photothermal bacteriostatic material of the embodiment 3 of the invention, which is 1 percent of the weight of the golden yellow staphylococcus bacterium liquid, is added into the cfu/ml golden yellow staphylococcus bacterium liquid.
Blank control group: 1ml of a solution containing 1.0X 103cfu/ml of staphylococcus aureus liquid.
2. Experimental methods and results:
after the samples of the experimental group and the blank group are added, irradiating by infrared light (wavelength of 818nm), taking 20ul of the samples from each group at corresponding time, injecting the samples into a culture dish, mixing the samples uniformly, and culturing the samples at 37 ℃ for 24h, wherein the culture medium is nutrient agar culture medium.
It can be seen that the experiment group 2 and the experiment group 3 using the nano material have obvious effect of inhibiting staphylococcus aureus by photo-heat compared with the blank control group, and staphylococcus aureus can be completely killed 10min after the nano material is added.
Aspergillus niger
1. Experiment grouping
Experimental groups: to 1ml of the solution containing 5.0X 103cfu/ml of aspergillus niger bacterial liquid, and the photothermal bacteriostatic material of the embodiment 3 of the invention which is 1 percent of the weight of the aspergillus niger bacterial liquid is added.
Blank control group: 1ml of a solution containing 5.0X 103cfu/ml Aspergillus niger liquid。
During the test, the test group and the control group are respectively added and diluted by 100 ten thousand times, 1ml of the mixture is placed in a culture medium for culturing at 31 ℃ for 48 hours after being irradiated by infrared light (the wavelength is 818nm), and the culture medium is PDA culture medium. The results are shown in fig. 1, the left-most part in fig. 1 is added into the experimental group, and the middle part and the right part are blank control groups, so that the bacteriostatic effect of the experimental group is more obvious over time.
Claims (8)
1. Ag @ Fe3O4@SiC/TiO2The synthesis method of the nano material is characterized by comprising the following steps:
A. uniformly mixing 1 weight part of SiC, 0-1 weight part of single-arm carbon nanotube and 0-1 weight part of graphene to obtain a silicon carbide substrate material;
B. taking Fe3O4Magnetic nanoparticles dispersed in ethanol to obtain Fe3O4Ethanol dispersion to Fe3O4Adding ethanol into the ethanol dispersion liquid, then adding deionized water and a concentrated ammonia solution, uniformly mixing, performing ultrasonic treatment for 10-60 minutes, adding the silicon carbide substrate material prepared in the step A, continuously stirring for 5-20 hours at room temperature, filtering, washing precipitates with the deionized water and the ethanol respectively, and filtering to obtain Fe3O4@SiC；
C. Mixing Fe3O4@ SiC and AgNO3Mixing the solutions, dropwise adding a sodium hydroxide solution under stirring to obtain a precipitate a, washing the precipitate a to be neutral by using deionized water, retaining water washed for the last time to obtain deionized water dispersion liquid of the precipitate a, dropwise adding a sodium borohydride solution into the dispersion liquid under stirring, filtering to obtain a precipitate b, washing the precipitate b to be neutral by using the deionized water to obtain Ag @ Fe3O4@SiC/TiO2And (3) nano materials.
2. Ag @ Fe as defined in claim 13O4@SiC/TiO2The synthesis method of the nano material is characterized in that the Fe3O4The preparation method of the magnetic nanoparticles comprises the following steps:
taking FeCl3Dissolving trisodium citrate and sodium acetate in ethylene glycol, stirring uniformly to obtain a yellow solution, transferring the yellow solution into a high-pressure reaction kettle, reacting for 6-20h under a sealing body at 160-240 ℃, cooling to room temperature, and filtering to obtain Fe3O4Magnetic nanoparticles.
3. Ag @ Fe as claimed in claim 23O4@SiC/TiO2The synthesis method of the nano material is characterized by comprising the following steps: the FeCl3With FeCl3·6H2In the O form, FeCl3·6H2The weight ratio of O, trisodium citrate, sodium acetate and glycol is as follows: 1-5:1-2:4-8: 100-130.
4. Ag @ Fe as defined in claim 13O4@SiC/TiO2The synthesis method of the nano material is characterized by comprising the following steps:
in the step B, the Fe3O4In an ethanol dispersion, Fe3O4The content of (A) is 0.01-0.1 g/mL; said Fe3O4The weight ratio of the ethanol dispersion liquid to the ethanol to the deionized water to the concentrated ammonia solution to the silicon carbide substrate material is 1-3:180-280:50-90: 2-5: 1.
5. ag @ Fe as in claim 43O4@SiC/TiO2The synthesis method of the nano material is characterized by comprising the following steps: the concentrated ammonia solution is 25-28% concentrated ammonia water.
6. Ag @ Fe as defined in claim 13O4@SiC/TiO2The synthesis method of the nano material is characterized by comprising the following steps:
in the step C, Fe3O4@SiC、AgNO3The weight ratio of the solution to the sodium hydroxide solution is as follows: 1-10:100: 100; wherein, AgNO3The concentration of the solution is 0.08-0.15g/mL, and the weight percentage concentration of the sodium hydroxide solution is 0.8-1.5%.
7. Ag @ Fe as defined in claim 13O4@SiC/TiO2The synthesis method of the nano material is characterized by comprising the following steps:
in the step C, the weight of the sodium borohydride solution and AgNO are dripped into the deionized water dispersion liquid of the precipitate a3The weight of the solution is consistent; wherein, the weight percentage of the sodium borohydride solution is 2-6%.
8. Ag @ Fe prepared by the process of any one of claims 1 to 73O4@SiC/TiO2The application of the nano material in infrared photo-thermal bacteriostasis.
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