CN106392097A - Cu-Ag bimetallic nano material, preparation method and application thereof - Google Patents
Cu-Ag bimetallic nano material, preparation method and application thereof Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/16—Making metallic powder or suspensions thereof using chemical processes
- B22F9/18—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds
- B22F9/24—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from liquid metal compounds, e.g. solutions
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N59/00—Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds
- A01N59/16—Heavy metals; Compounds thereof
- A01N59/20—Copper
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/05—Metallic powder characterised by the size or surface area of the particles
- B22F1/054—Nanosized particles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/05—Metallic powder characterised by the size or surface area of the particles
- B22F1/054—Nanosized particles
- B22F1/0553—Complex form nanoparticles, e.g. prism, pyramid, octahedron
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
Abstract
The invention provides a Cu-Ag bimetallic nano material, a preparation method and application thereof, and belongs to the field of nano materials. The preparation method comprises the steps of preparing a polyatomic alcohol solution of silver nitrate, a polyatomic alcohol solution of polyvinylpyrrolidone and a polyatomic alcohol solution of copper acetate; mixing the polyatomic alcohol solution of silver nitrate with the polyatomic alcohol solution of polyvinylpyrrolidone according to the fact that the volume ratio of the polyatomic alcohol solution of silver nitrate to the polyatomic alcohol solution of polyvinylpyrrolidone is 1 to (1 to 1.2), and carrying out microwave treatment to obtain an Ag nano solution; mixing an n-heptanol solution of copper acetate with the Ag nano solution according to the volume ratio of the n-heptanol solution of copper acetate to the Ag nano solution is 1 to (1 to 1.2), and carrying out microwave treatment to obtain Cu-Ag nano sol suspension; and carrying out centrifugal cleaning on the Cu-Ag nano sol suspension, and removing supernate to obtain the Cu-Ag bimetallic nano material. The preparation method of the Cu-Ag bimetallic nano material provided by the invention is simple and reliable to use and environment-friendly in technology. The invention further discloses the Cu-Ag bimetallic nano material prepared through the method and application of the Cu-Ag bimetallic nano material as an antibacterial agent.
Description
Technical field
The present invention relates to field of nanometer material technology, in particular to a kind of Cu-Ag bimetal nano material, its preparation side
Method and application.
Background technology
Bimetal nano material be by two different kinds of compatibility material physics, be chemically synthesized have many
The double metallic composite material of phase structure.Through long-term research, people have synthesized nucleocapsid, hollow, polyhedron, Phaleria macrocarpa-bright
Pearl isostructural bimetal nano material, compared with monometallic nano material, bimetal nano material has that size is little, specific surface
Long-pending big feature, shows physics and the chemical property of uniqueness, has excellent photoelectricity and biochemical property, such as has Phaleria macrocarpa-bright
The catalysis activity of the Au-Pd nano material of pearls knot structure is than the catalysis of Au, Pd monometallic nano material and Au-Pd alloy nano-material
Activity wants much higher though it is foreseeable that bimetal nano material has in the field such as biomedical, catalysis material and photoelectricity
Vast potential for future development.
Cu-Ag bimetal nano material has the advantages that Cu nano material and Ag nano material, overcomes Cu nanometer material again
Expect oxidizable defect, there is very strong practical value, therefore have many scholars that Cu-Ag bimetal nano material is ground
Study carefully, such as Authorization Notice No. is a kind of patent of invention " method preparing nanometer copper-silver bimetallic composite powder " of CN10044857C, its
Disclose a kind of preparation method of the copper-silver metal powder of chain structure.But the method is complex, the copper silver preparing is double
The particle diameter of metal powder is larger (particle diameter is 30-100nm).And for example application publication number is patent of invention " the copper silver of CN105562702A
Alloy nano functional material and its preparation method and application ", it discloses copper silver nano material, its preparation of a kind of spherical structure
Method and its application in antibiosis.But the particle diameter of the copper silver nano material that the method prepares is also larger, and (particle diameter is 40-
60nm), and preparation process need time longer.
Accordingly, it would be desirable to a kind of preparation method is simple, take shorter, can prepare that particle diameter is little, the Cu-Ag of good dispersion
The method of nano material.
Content of the invention
The invention provides a kind of preparation method of Cu-Ag bimetal nano material, the method is easy and simple to handle, the response time
Short and course of reaction is easy to control, prepared particle size is little, good dispersion.
Present invention also offers a kind of Cu-Ag bimetal nano material, it is to be prepared by above-mentioned preparation method.
Present invention also offers application in terms of antibacterial for the above-mentioned Cu-Ag bimetal nano material.
The present invention is realized in：A kind of preparation method of Cu-Ag bimetal nano material, it comprises the following steps：
Prepare the polyhydric alcohol solutions of silver nitrate of 5-20mmol/L, the polynary of the Polyvinylpyrrolidone of 40-100mmol/L
The polyhydric alcohol solutions of the Schweinfurt green of alcoholic solution and 5-20mmol/L；
By the polyhydric alcohol solutions of the polyhydric alcohol solutions of silver nitrate and Polyvinylpyrrolidone by volume 1:1-1.2 mixes simultaneously
Stir, obtain the first solution, the first solution is carried out microwave heating treatment, obtain Ag Nano sol；
By the n-heptanol solution of Schweinfurt green and Ag Nano sol by volume 1:1-1.2 is mixed and stirred for uniformly, obtaining
Two solution, the second solution is carried out microwave heating treatment, obtains Cu-Ag Nano sol suspension；
By Cu-Ag Nano sol suspension eccentric cleaning, remove supernatant and obtain Cu-Ag bimetal nano material.
Further, polyhydric alcohol includes one of ethylene glycol, glycerol, n-heptanol.
Further, when the first solution being carried out microwave heating treatment, microwave power is 520-650W, and process time is
90-120s.
Further, the mol ratio of the Cu in the second solution and Ag is 4:1-1:4.
Further, when the second solution being carried out microwave heating treatment, microwave power is 500-650W, and process time is
90-180s.
Further, the method for eccentric cleaning is：Cu-Ag Nano sol suspension is first pressed volume using ethanol and acetone
Ratio 1:The cleanout fluid eccentric cleaning that 1 is mixed to get 2-3 time, subsequently uses deionized water eccentric cleaning 2-3 time.
Further, the centrifugal rotational speed of eccentric cleaning is 12000-15000rpm, and the eccentric cleaning time is 15-20min.
Present invention also offers a kind of Cu-Ag bimetal nano material, it adopts above-mentioned Cu-Ag bimetal nano material
Preparation method prepares.
Further, Cu-Ag bimetal nano material is polyhedral structure, and its particle diameter is 10-30nm.
The invention also discloses the application that above-mentioned Cu-Ag bimetal nano material uses as antibacterial.
The invention has the beneficial effects as follows：The invention provides a kind of preparation method of Cu-Ag bimetal nano material, the party
Method adopt microwave heating alcohol reducing process, with Polyvinylpyrrolidone as dispersion stabilizer, polyhydric alcohol be reducing agent, successively by silver from
Son and copper ion carry out reduction and prepare Cu-Ag bimetal nano material, and it is cheap and easy to get that the method has a raw material, apparatus and process
Simply, the response time is short, and reaction controllability is strong, and yield is high, the advantages of energy-conserving and environment-protective.Using the double gold of the Cu-Ag of the method preparation
Metal nanometer material presents various polyhedral structures, and particle diameter is little and is evenly distributed, good dispersion.This Cu-Ag bimetal nano material
Material shows the Developing restraint effect stronger to escherichia coli, has the application prospect of antibacterial aspect.
Brief description
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, below will be attached to use required in embodiment
Figure is briefly described it will be appreciated that the following drawings illustrate only certain embodiments of the present invention, and it is right to be therefore not construed as
The restriction of scope, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to this
A little accompanying drawings obtain other related accompanying drawings.
Fig. 1 is the TEM electromicroscopic photograph of the Cu-Ag bimetal nano material of preparation in the embodiment of the present invention 1；
Fig. 2 is the energy spectrum diagram of the Cu-Ag bimetal nano material of preparation in the embodiment of the present invention 1；
Fig. 3 is the XRD figure of the Cu-Ag bimetal nano material of preparation in the embodiment of the present invention 1；
Fig. 4 is the electronogram in constituency in Fig. 3；
The Cu-Ag bimetal nano material that Fig. 5 prepares for embodiment 1 to embodiment 4 is to colibacillary antibacterial ring size
Figure.
Specific embodiment
Purpose, technical scheme and advantage for making the embodiment of the present invention are clearer, below will be in the embodiment of the present invention
Technical scheme be clearly and completely described.In embodiment, unreceipted actual conditions person, builds according to normal condition or manufacturer
The condition of view is carried out.Agents useful for same or the unreceipted production firm person of instrument, being can be by the commercially available conventional product bought and obtain
Product.
Preparation method to Cu-Ag bimetal nano material provided in an embodiment of the present invention and being prepared using the method below
The Cu-Ag bimetal nano material obtaining is specifically described.
The embodiment of the present invention provides a kind of preparation method of Cu-Ag bimetal nano material, comprises the following steps：
Prepare the polyhydric alcohol solutions of silver nitrate of 5-20mmol/L, the polynary of the Polyvinylpyrrolidone of 40-100mmol/L
The polyhydric alcohol solutions of the Schweinfurt green of alcoholic solution and 5-20mmol/L；Wherein polyhydric alcohol include ethylene glycol, glycerol, in n-heptanol
One kind.
By the polyhydric alcohol solutions of the polyhydric alcohol solutions of silver nitrate and Polyvinylpyrrolidone by volume 1:1-1.2 mixes simultaneously
Stirring and dissolving, obtains the first solution, and the first solution is carried out microwave heating treatment, obtains Ag Nano sol, and microwave power is
520-650W, process time is 90-120s；
By the n-heptanol solution of Schweinfurt green and Ag Nano sol by volume 1:1-1.2 is mixed and stirred for dissolving, and obtains the
Two solution, the mol ratio of the Cu in the second solution and Ag is 4:1-1:4；Second solution is carried out microwave heating treatment, microwave work(
Rate is 500-650W, and process time is 90-180s, obtains Cu-Ag Nano sol suspension；
By Cu-Ag Nano sol suspension eccentric cleaning, remove supernatant and obtain Cu-Ag bimetal nano material.Centrifugation
Cleaning method be：By Cu-Ag Nano sol suspension first using ethanol and acetone by volume 1:1 cleanout fluid being mixed to get
Eccentric cleaning 2-3 time, subsequently uses deionized water eccentric cleaning 2-3 time；The centrifugal rotational speed of eccentric cleaning is 12000-
15000rpm, the eccentric cleaning time is 15-20min.
The preparation method of the Cu-Ag bimetal nano material that the present embodiment provides, is by presoma silver nitrate and presoma
Schweinfurt green is dissolved separately in polyhydric alcohol solutions, subsequently use the polyhydric alcohol solutions of Polyvinylpyrrolidone of suitable concn with
The polyhydric alcohol solutions mixing of presoma silver nitrate, and reduction obtains finely dispersed Ag Nano sol solution under microwave heating,
Subsequently this Ag Nano sol solution is mixed with the polyhydric alcohol solutions of presoma Schweinfurt green, and reduction reaction under microwave heating,
Obtain that particle diameter is little and the Cu-Ag bimetal nano particles of even particle size distribution.This preparation method utilizes microwave heating, makes to be heated
The dipole molecule high-frequency reciprocating motion in internal portion, thus internal produce heat and so that heated temperature of charge is raised it is not necessary to borrow
Help the heat transfer process of medium, material inside and outside portion just can be made to heat simultaneously, heat up simultaneously, firing rate they heat quickly and evenly, and
Obtain the Cu-Ag bimetal nano particles of appropriate particle size, and the energy consumption consuming only has the 1/20-1/30 of traditional heating mode, should
It is cheap and easy to get that the preparation method of Cu-Ag bimetal nano material has a raw material, and apparatus and process is simple, and the response time is short, reaction
Controllability is strong, and product yield is high, the many merits such as energy-conserving and environment-protective.
The embodiment of the invention also discloses a kind of Cu-Ag bimetal nano material being prepared using above-mentioned preparation method
Material, this Cu-Ag bimetal nano material particle size is 10-30nm, and its structure is in polyhedron-shaped.
The invention also discloses application in terms of antibacterial for the above-mentioned Cu-Ag bimetal nano material.
With reference to embodiments the feature and performance of the present invention is described in further detail.
Embodiment 1
Embodiments of the invention 1 provide a kind of Cu-Ag bimetal nano material, and its preparation method is as follows：
S101, the n-heptanol solution of silver nitrate preparing 10mmol/L, the n-heptanol of 60mmol/L Polyvinylpyrrolidone
Solution, the n-heptanol solution of 20mmol/L Schweinfurt green；
S102, by the n-heptanol solution of the n-heptanol solution of this silver nitrate and Polyvinylpyrrolidone by volume 1:1.2
Mix homogeneously, magnetic agitation 120s, to being completely dissolved, obtains the first solution, the first solution is transferred to be positioned over microwave chemical anti-
Answer the polyethylene can tank in device, regulation microwave power is 550W, heats 110s, obtains Ag Nano sol after being cooled to room temperature；
S103, by the n-heptanol solution of Schweinfurt green and Ag Nano sol by volume 1:1.1 mix homogeneously, magnetic agitation
90s, to being completely dissolved, obtains the second solution, and in the second solution, the mol ratio of Cu and Ag is 2:1；Second solution is transferred to placement
Polyethylene can tank in microwave chemical reactor, regulation microwave power is 600W, heats 160s, obtains Cu-Ag nanometer molten
Glue suspension；
S104, Cu-Ag Nano sol suspension is put in high speed centrifuge, using ethanol and acetone by volume 1:1
After the cleanout fluid eccentric cleaning being mixed to get 3 times, using deionized water eccentric cleaning 3 times, the centrifugal rotational speed of eccentric cleaning is
13000rpm, each eccentric cleaning time is 17min, subsequently outwells the supernatant, and removal supernatant obtains Cu-Ag bimetallic and receives
Rice material.
Embodiment 2
Embodiments of the invention 2 provide a kind of Cu-Ag bimetal nano material, and its preparation method is as follows：
S201, the ethylene glycol solution of silver nitrate preparing 10mmol/L, the ethylene glycol of 75mmol/L Polyvinylpyrrolidone
Solution, the ethylene glycol solution of 10mmol/L Schweinfurt green；
S202, by the ethylene glycol solution of the ethylene glycol solution of this silver nitrate and Polyvinylpyrrolidone by volume 1:1 mixes
Close uniformly, magnetic agitation 90s, to being completely dissolved, obtains the first solution, the first solution is transferred to and is positioned over microwave chemical reaction
Polyethylene can tank in device, regulation microwave power is 600W, heats 105s, obtains Ag Nano sol after being cooled to room temperature；
S203, by the ethylene glycol solution of Schweinfurt green and Ag Nano sol by volume 1:1.1 mix homogeneously, magnetic agitation
100s, to being completely dissolved, obtains the second solution, and in the second solution, the mol ratio of Cu and Ag is 1:1；Second solution is transferred to and puts
It is placed in the polyethylene can tank in microwave chemical reactor, regulation microwave power is 500W, heats 140s, obtains Cu-Ag nanometer
Colloidal sol suspension；
S204, Cu-Ag Nano sol suspension is put in high speed centrifuge, using ethanol and acetone by volume 1:1
After the cleanout fluid eccentric cleaning being mixed to get 3 times, using deionized water eccentric cleaning 3 times, during eccentric cleaning, centrifugal rotational speed is
14000rpm, each eccentric cleaning time is 16min, subsequently outwells the supernatant, and removal supernatant obtains Cu-Ag bimetallic and receives
Rice material.
Embodiment 3
Embodiments of the invention 3 provide a kind of Cu-Ag bimetal nano material, and its preparation method is as follows：
S301, prepare the glycerin solution of silver nitrate of 5mmol/L, 80mmol/L Polyvinylpyrrolidone glycerol molten
Liquid, the glycerin solution of 20mmol/L Schweinfurt green；
S302, by the glycerin solution of the glycerin solution of this silver nitrate and Polyvinylpyrrolidone by volume 1:1 mixes
Close uniformly, magnetic agitation 90s, to being completely dissolved, obtains the first solution, the first solution is transferred to and is positioned over microwave chemical reaction
Polyethylene can tank in device, regulation microwave power is 650W, heats 115s, obtains Ag Nano sol after being cooled to room temperature；
S303, by the glycerin solution of Schweinfurt green and Ag Nano sol by volume 1:1.2 mix homogeneously, magnetic agitation
120s, to being completely dissolved, obtains the second solution, and in the second solution, the mol ratio of Cu and Ag is 4:1；Second solution is transferred to and puts
It is placed in the polyethylene can tank in microwave chemical reactor, regulation microwave power is 530W, heats 150s, obtains Cu-Ag nanometer
Colloidal sol suspension；
S304, Cu-Ag Nano sol suspension is put in high speed centrifuge, using ethanol and acetone by volume 1:1
After the cleanout fluid eccentric cleaning being mixed to get 2 times, using deionized water eccentric cleaning 2 times, during eccentric cleaning, centrifugal rotational speed is
12000rpm, each eccentric cleaning time is 18min, subsequently outwells the supernatant, and removal supernatant obtains Cu-Ag bimetallic and receives
Rice material.
Embodiment 4
Embodiments of the invention 4 provide a kind of Cu-Ag bimetal nano material, and its preparation method is as follows：
S401, the n-heptanol solution of silver nitrate preparing 16mmol/L, the n-heptanol of 90mmol/L Polyvinylpyrrolidone
Solution, the n-heptanol solution of 8mmol/L Schweinfurt green；
S402, by the n-heptanol solution of the n-heptanol solution of this silver nitrate and Polyvinylpyrrolidone by volume 1:1.2
Mix homogeneously, magnetic agitation 60s, to being completely dissolved, obtains the first solution, the first solution is transferred to be positioned over microwave chemical anti-
Answer the polyethylene can tank in device, regulation microwave power is 580W, heats 100s, obtains Ag Nano sol after being cooled to room temperature；
S403, by the n-heptanol solution of Schweinfurt green and Ag Nano sol by volume 1:1.2 mix homogeneously, magnetic agitation
90s, to being completely dissolved, obtains the second solution, and in the second solution, the mol ratio of Cu and Ag is 1:2；Second solution is transferred to placement
Polyethylene can tank in microwave chemical reactor, regulation microwave power is 620W, heats 150s, obtains Cu-Ag nanometer molten
Glue suspension；
S404, Cu-Ag Nano sol suspension is put in high speed centrifuge, using ethanol and acetone by volume 1:1
After the cleanout fluid eccentric cleaning being mixed to get 3 times, using deionized water eccentric cleaning 3 times, during eccentric cleaning, centrifugal rotational speed is
15000rpm, each eccentric cleaning time is 20min, subsequently outwells the supernatant, and removal supernatant obtains Cu-Ag bimetallic and receives
Rice material.
Respectively the Cu-Ag bimetal nano material that embodiment 1, embodiment 2, embodiment 3, embodiment 4 prepare is made
It is distributed in deionized water with ultrasound wave, form Cu-Ag bimetal nano colloidal sol, and they are detected.
First, Electronic Speculum detection.
Respectively prepared by the Cu-Ag bimetal nano material in above-described embodiment 1, embodiment 2, embodiment 3, embodiment 4
The Cu-Ag bimetal nano colloidal sol obtaining carries out observing and Electronic Speculum detection, and result is as follows：
The Cu-Ag bimetal nano colloidal sol color that embodiment 1 prepares is khaki, and nano-particle disperses in water
Uniformly, Electronic Speculum detection is carried out to this Cu-Ag bimetal nano colloidal sol, as shown in figure 1, electromicroscopic photograph shows this Cu-Ag bimetallic
In Nano sol, mostly to assume positive trihedral shape, cubic shaped, regular hexahedron shape etc. polyhedron-shaped for nano-particle, few
Number present spherical and bar-shaped, its grain size be 10-30nm.
The Cu-Ag bimetal nano colloidal sol color that embodiment 2 prepares is light gray, and nano-particle disperses all in water
Even, electromicroscopic photograph shows that in this Cu-Ag bimetal nano colloidal sol, nano-particle mostly assumes equilateral triangle shape, and minority assumes ball
Shape, bar-shaped, its grain size is 12-25nm.
The Cu-Ag bimetal nano colloidal sol color that embodiment 3 prepares is filbert, and nano-particle disperses all in water
Even, electromicroscopic photograph shows that in this Cu-Ag bimetal nano colloidal sol, nano-particle mostly assumes cubic shaped and regular hexagon shape,
Minority present spherical, its grain size be 15-30nm.
The Cu-Ag bimetal nano colloidal sol color that embodiment 4 prepares is brown color, and nano-particle disperses all in water
Even, electromicroscopic photograph shows that in this Cu-Ag bimetal nano colloidal sol, nano-particle mostly assumes regular hexagon shape, and minority assumes ball
Shape, bar-shaped, its grain size is 11-24nm.
2nd, spectroscopy detection and XRD detection.
The Cu-Ag bimetal nano colloidal sol that Cu-Ag bimetal nano material in embodiment 1 is prepared carries out power spectrum
Detection and XRD detection, result is as follows：
Fig. 2 is the energy spectrum diagram of the Cu-Ag bimetal nano colloidal sol of preparation in the embodiment of the present invention 1, as seen from Figure 2,
This Cu-Ag bimetal nano material is by two kinds of elementary composition alloy materials of Cu, Ag.
Fig. 3 is the XRD figure of the Cu-Ag bimetal nano colloidal sol of preparation in embodiment 1, can see Cu's and Ag in Fig. 3
Characteristic peak, shows that this Cu-Ag bimetal nano material is elementary composition by two kinds of Cu, Ag.Fig. 4 is the electronic diffraction in constituency in Fig. 3
Figure, as seen from Figure 4, this Cu-Ag bimetal nano material is to be formed by fcc Cu and face-centered cubic Ag crystal combination.
3rd, anti-microbial property detection.
Cu-Ag bimetal nano material in above-described embodiment 1, embodiment 2, embodiment 3, embodiment 4 is prepared
The anti-microbial property of Cu-Ag bimetal nano colloidal sol tested, method of testing is as follows：
E. coli concentration is measured using dilution plate counting method, colibacillary concentration is 107-108cfu/mL.No
In the superclean bench of bacterium laboratory, after the heating fusing of LB solid medium, it is poured in culture dish, makes the culture medium thickness be
4-5mm, after culture medium solidifying, with liquid-transfering gun transferase 12 00uL escherichia coli on LB solid medium, with the triangle after sterilizing
Escherichia coli are uniformly coated on LB solid medium even spread rod.Got multiple a diameter of from filter paper with card punch
The circular filter paper piece of 6mm, and the autoclave mesohigh sterilizing in 138 DEG C/0.25MPa, with the circular filter of four after sterilizing
The Cu-Ag bimetal nano colloidal sol that the scraps of paper absorb 20uL embodiment 1 respectively, embodiment 2, embodiment 3, embodiment 4 prepare,
It is positioned over absorbing four circular filter paper pieces having Cu-Ag bimetal nano colloidal sol on Escherichia coli culture medium, 37 DEG C of constant temperature trainings
After foster 24h, observe antibacterial ring size.
As shown in figure 5, A is the antibacterial ring size picture of the Cu-Ag bimetal nano colloidal sol of embodiment 1 preparation in wherein Fig. 5, suppression
The a diameter of 7.7-7.8mm of collarium；In Fig. 5, B is the antibacterial ring size picture of the Cu-Ag bimetal nano colloidal sol of embodiment 2 preparation, antibacterial
Ring diameter is 7.4-7.5mm；In Fig. 5, C is the antibacterial ring size picture of the Cu-Ag bimetal nano colloidal sol of embodiment 3 preparation, antibacterial ring size
A diameter of 7.0-7.1mm；In Fig. 5, D is the antibacterial ring size picture of the Cu-Ag bimetal nano colloidal sol of embodiment 4 preparation, and antibacterial ring size is straight
Footpath is 11.2-11.3mm.From above-mentioned antibacterial ring test structure, the Cu-Ag bimetal nano material that the present invention prepares
There is to escherichia coli good inhibition, it has the prospect of the application of medical antibacterial agent.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, made any repair
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (10)
1. a kind of preparation method of Cu-Ag bimetal nano material is it is characterised in that comprise the following steps：
Prepare the polyhydric alcohol solutions of silver nitrate of 5-20mmol/L, the Polyvinylpyrrolidone of 40-100mmol/L polyhydric alcohol molten
The polyhydric alcohol solutions of the Schweinfurt green of liquid and 5-20mmol/L；
By the polyhydric alcohol solutions of the polyhydric alcohol solutions of described silver nitrate and described Polyvinylpyrrolidone by volume 1:1-1.2 it is mixed
Merging stirs, and obtains the first solution, described first solution is carried out microwave heating treatment, obtains Ag Nano sol；
By the n-heptanol solution of described Schweinfurt green and described Ag Nano sol by volume 1:1-1.2 is mixed and stirred for uniformly, obtaining
To the second solution, described second solution is carried out microwave heating treatment, obtain Cu-Ag Nano sol suspension；
By described Cu-Ag Nano sol suspension eccentric cleaning, remove supernatant and obtain Cu-Ag bimetal nano material.
2. the preparation method of Cu-Ag bimetal nano material according to claim 1 is it is characterised in that described polyhydric alcohol
Including one of ethylene glycol, glycerol, n-heptanol.
3. the preparation method of Cu-Ag bimetal nano material according to claim 1 is it is characterised in that by described first
When solution carries out microwave heating treatment, microwave power is 520-650W, and process time is 90-120s.
4. the preparation method of Cu-Ag bimetal nano material according to claim 1 is it is characterised in that described second is molten
The mol ratio of the Cu in liquid and Ag is 4:1-1:4.
5. the preparation method of Cu-Ag bimetal nano material according to claim 1 is it is characterised in that by described second
When solution carries out microwave heating treatment, microwave power is 500-650W, and process time is 90-180s.
6. the preparation method of Cu-Ag bimetal nano material according to claim 1 is it is characterised in that described centrifugation is clear
The method washed is：By described Cu-Ag Nano sol suspension first using ethanol and acetone by volume 1:1 cleaning being mixed to get
Liquid eccentric cleaning 2-3 time, subsequently uses deionized water eccentric cleaning 2-3 time.
7. the preparation method of Cu-Ag bimetal nano material according to claim 6 is it is characterised in that described centrifugation is clear
The centrifugal rotational speed washed is 12000-15000rpm, and the eccentric cleaning time is 15-20min.
8. a kind of Cu-Ag bimetal nano material is it is characterised in that it adopts the Cu-Ag any one of claim 1-7
The preparation method of bimetal nano material prepares.
9. Cu-Ag bimetal nano material according to claim 8 is it is characterised in that described Cu-Ag bimetal nano material
Expect for polyhedral structure, and its particle diameter is 10-30nm.
10. a kind of application of the Cu-Ag bimetal nano material described in claim 8 is it is characterised in that described Cu-Ag is double golden
Metal nanometer material uses as antibacterial.
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Cited By (3)
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| WO2021100930A1 (en) * | 2019-11-22 | 2021-05-27 | 주식회사 메디풀 | Antibacterial deodorant composition and production method therefor |
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Application publication date: 20170215 |