CN110352982A - A kind of quaternary alkylphosphonium salt modified montmorillonoid load Co-doped ZnO quantum dot nano complex antimicrobials and preparation method thereof - Google Patents
A kind of quaternary alkylphosphonium salt modified montmorillonoid load Co-doped ZnO quantum dot nano complex antimicrobials and preparation method thereof Download PDFInfo
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Abstract
The present invention discloses a kind of quaternary alkylphosphonium salt modified montmorillonoid load Co-doped ZnO quantum dot nano complex antimicrobials and preparation method thereof, utilize the huge specific surface area of the modified MMT of quaternary alkylphosphonium salt and high-absorbility, by bacterial adsorption to its surface, then collaboration is supported on montmorillonite surface and cobalt (Co) the doping zinc-oxide quantum dot (ZnO QDs) of interlayer plays high-efficiency antimicrobial effect, bacterium is killed, the high novel nano complex antimicrobials of a kind of good biocompatibility, antibacterial activity are finally prepared;The load Co-doped ZnO quantum dot nano complex antimicrobials of quaternary alkylphosphonium salt modified montmorillonoid prepared by the present invention have many advantages, such as that safety and environmental protection, drug resistance are strong, to the minimal inhibitory concentrations of Escherichia coli up to 1.8mg/mL.
Description
Technical field
The present invention relates to a kind of high-efficient antibacterial agents, and in particular to a kind of quaternary alkylphosphonium salt modified montmorillonoid load Co-doped ZnO
Quantum dot nano complex antimicrobials and preparation method thereof.
Background technique
In recent years, not enough, it is unfavorable to prevent, and, which results in global, is expected to industrial negative effect due to people
Three big crises: shortage of resources, environmental pollution, ecological disruption.At the same time, the improper use of antibacterials leads to various cause a disease
The appearance of bacterium, fungi and virus more has the increase of drug-fast bacteria and the generation of super drug-resistant bacteria.The research and development of various antibacterial agents are
Through becoming current research hotspot, wherein inorganic antibacterial material, can be high-efficiency continuous because cheap, security performance is high, nontoxic
It sterilizes and receives more and more attention.ZnO antibacterial agent is because having nontoxic, safe and reliable and thermal stability and chemical stability
The advantages that high, rapidly becomes the research hotspot of current antibacterial agent.Correlative study shows: nano-ZnO size is smaller, antibiotic property
Can be better, but the nano-ZnO of small size large specific surface area itself, easy to reunite, and its greater band gap, biocompatibility it is poor,
Electron-hole is easily compound, is unfavorable for it and plays high-efficiency antimicrobial performance.
Montmorillonite (MMT) has many advantages, such as big specific surface area and high ion-exchange capacity as a kind of natural carrier,
It is set to be widely used in terms of improving environment.Octahedra alumina layer is located at two silicon oxygen in the layer structure of the 2:1 of MMT
Between tetrahedral layer and mutually share oxygen atom.In addition, a large amount of exchangeable cations can be by the sun with antibacterial activity in MMT
Ion exchange, so that MMT interlayer surface be caused to generate negative electrical charge, negative electrical charge can attract electron hole pair, promote electron hole pair
Transfer.
But original montmorillonoid soil does not have excellent anti-microbial property, and it is modified through organic modifiers, organic cation takes
Increase its interlamellar spacing for MMT interlayer cation, while improving MMT layers of microenvironment, makes the surfaces externally and internally of MMT by hydrophily
Be converted into hydrophobicity, enhancing montmorillonite layer and be supported the compatibility of material, and increase silicate material specific surface area,
Absorptivity is improved, and then adsorbs bacterium ability, improves anti-microbial property.Therefore, the modified montmorillonoid of layer structure is that one kind is used for
Prepare the excellent substrate of good anti-microbial property.
Summary of the invention
In view of the above shortcomings of the prior art, present invention aims at propose a kind of quaternary alkylphosphonium salt modified montmorillonoid Supported Co
Doping zinc-oxide quantum dot nano complex antimicrobials and preparation method thereof, easy to operate, preparation process mild condition, preparation is received
Rice complex antimicrobials good biocompatibility, safety and environmental protection, antibacterial effect are excellent.
To achieve the goals above, the present invention uses following technical scheme.
A kind of preparation method of quaternary alkylphosphonium salt modified montmorillonoid load Co-doped ZnO quantum dot nano complex antimicrobials, packet
Include following steps:
Step 1: being that 1:0.007 weighs acetic acid dihydrate zinc respectively and four acetate hydrate cobalts disperse by zinc and cobalt molar ratio
It is (0.03-0.07) An quaternary alkylphosphonium salt modified montmorillonoid and acetic acid dihydrate zinc mass ratio: 1 after mixing evenly in dehydrated alcohol
Quaternary alkylphosphonium salt modified montmorillonoid is added, 60-90 DEG C of heating in water bath for reaction 0.5-2h mixes to get zinc, cobalt, quaternary alkylphosphonium salt modified montmorillonoid
Precursor solution;
Step 2: magnetic agitation in lithium hydroxide addition ethanol solution is uniform, by acetic acid dihydrate zinc and lithium hydroxide
Middle Zn2+:OH-Molar ratio be 1:1.4 by gained aqueous slkali be added drop-wise to step 1 preparation zinc, cobalt, quaternary alkylphosphonium salt modified montmorillonoid
It mixes in precursor solution, after mixing, magnetic agitation to reaction terminates;Then deionized water is gradually added into until solution becomes
At milky, stands, cleans, centrifugation resists to get quaternary alkylphosphonium salt modified montmorillonoid load Co-doped ZnO quantum dot nano is compound
Microbial inoculum.
Further, the preparation process of the quaternary alkylphosphonium salt modified montmorillonoid is as follows:
Step 1.1: weighing appropriate sodium-based montmorillonite and be scattered in deionized water, 80 DEG C of heating water bath stirring 30min obtain sodium
Base montmorillonite dispersion liquid;Cetyltributylphosphonium bromine is taken by hexadecyl tributyl phosphonium bromide and sodium-based montmorillonite mass ratio 1:2
Hua Phosphonium is scattered in deionized water, after it is completely dissolved, is added in sodium-based montmorillonite dispersion liquid, in 60-80 DEG C of heating water bath
Under the conditions of stir 2h after, stand 1-2h wait for its cooling;
Step 1.2: filtering and washing repeatedly is carried out to cooling solution, until no Br ion detection goes out, then drying, grinding
At fine powder to get quaternary alkylphosphonium salt modified montmorillonoid.
Further, the temperature when dropwise addition alkali source is 20-30 DEG C.
Further, centrifugal treating in the step 2, centrifugation rate 8000rpm/min.
Further, magnetic force stirs solution addition deionized water again at room temperature after solution becomes milky in the step 2
Mix 10min.
The invention has the following advantages:
Quaternary alkylphosphonium salt modified montmorillonoid of the invention loads Co-doped ZnO quantum dot nano complex antimicrobials, with quaternary alkylphosphonium salt
Modified MMT is carrier, and four acetate hydrate cobalts are dopant, and novel photoelectric functional material ZnO quantum dot is major antibacterial components, benefit
The huge specific surface area of the modified MMT of Yong quaternary alkylphosphonium salt and high-absorbility, by bacterial adsorption to its surface, then it is de- to be supported on illiteracy for collaboration
Cobalt (Co) the doping zinc-oxide quantum dot (ZnO QDs) of native surface and interlayer plays high-efficiency antimicrobial effect, bacterium is killed, finally
Prepare the high novel nano complex antimicrobials of a kind of good biocompatibility, antibacterial activity.
Cobalt (Co) doping zinc-oxide quantum dot (ZnO QDs) with high antibacterial activity component is embedded into MMT interlayer, one
Aspect efficiently solves cobalt (Co) doping zinc-oxide quantum dot defect easy to reunite;On the other hand, the Al in MMT lattice3+And Si4 +Ion is easy and isomorphous substitutions occur for other cation at a low price, such as by with antibacterial activity quaternary alkylphosphonium salt cation replacement, from
And montmorillonite layer is made to cause MMT interlayer surface to generate negative electrical charge with negative electrical charge, negative electrical charge can attract electron hole
It is right, promote the transfer of electron hole pair.After organic cation replaces MMT interlayer cation, interlamellar spacing increases, and improves simultaneously
MMT layers of microenvironment makes the surfaces externally and internally of MMT by hydrophilic conversion hydrophobicity, enhances montmorillonite layer and be supported material
The compatibility of cobalt (Co) doping zinc-oxide quantum dot (ZnO QDs), while increasing the specific surface area of composite material, improving absorption
Rate, and then bacterium is adsorbed, improve its anti-microbial property.
Compared with traditional antibacterial, composite nano germicide prepared by the present invention has safety and environmental protection, drug resistance strong etc. excellent
Point, using the load Co-doped ZnO quantum dot nano complex antimicrobials of quaternary alkylphosphonium salt modified montmorillonoid prepared by the present invention to big
The minimal inhibitory concentration of enterobacteria is up to 1.8mg/mL.
Detailed description of the invention
Fig. 1 is that quaternary alkylphosphonium salt modified montmorillonoid prepared by the present invention loads Co-doped ZnO quantum dot nano composite antibacterial
The SEM photograph of agent;
Fig. 2 a) it is Escherichia coli blank master drawing;
Fig. 2 b) it is that quaternary alkylphosphonium salt modified montmorillonoid load Co-doped ZnO quantum dot nano prepared by the present invention is compound anti-
Antibacterial effect figure of the microbial inoculum to Escherichia coli;
Fig. 3 is that quaternary alkylphosphonium salt modified montmorillonoid prepared by the present invention loads Co-doped ZnO quantum dot nano composite antibacterial
Minimal inhibitory concentration test chart of the agent to Escherichia coli.
Specific embodiment
Present invention is further described in detail combined with specific embodiments below, but not as a limitation of the invention.
Embodiment 1:
Step 1: weighing 5g sodium-based montmorillonite and be scattered in 100mL deionized water, and 80 DEG C of heating water baths stir 30min;It will
2.5g hexadecyl tributyl phosphonium bromide is scattered in 50mL deionized water, and after it is completely dissolved, sodium-based montmorillonite point is added
In dispersion liquid, after stirring 2h under 60 DEG C of condition of water bath heating, stands 1h and wait for its cooling, it is carried out repeatedly with Vacuum filtration device
Filtering and washing, up to no Br ion detection goes out (to use AgNO3It examines).After 60 DEG C of drying for 24 hours, fine powder is ground into get season
Phosphonium salt modified montmorillonoid;
Step 2: the four acetate hydrate cobalts for weighing 5mmol acetic acid dihydrate zinc and 0.035mmol respectively are scattered in 100mL
In dehydrated alcohol, after mixing evenly, the modified MMT of 30mg quaternary alkylphosphonium salt is added, pours into three-necked flask, 80 DEG C of heating in water bath for reaction
1h is to get zinc, cobalt, quaternary alkylphosphonium salt modified montmorillonoid mixing precursor solution;100mL ethanol solution is added in 7mmol lithium hydroxide
In, after magnetic agitation 30min, before gained aqueous slkali is added drop-wise to zinc prepared by early period, the mixing of cobalt, quaternary alkylphosphonium salt modified montmorillonoid
It drives in liquid solution, after mixing, 100mL deionized water is added until solution becomes cream in magnetic agitation 30min after reaction
White, magnetic agitation 10min, stands, cleaning, is centrifuged to get quaternary alkylphosphonium salt modified montmorillonoid load Co-doped ZnO at room temperature
Quantum dot nano complex antimicrobials.
As shown in Figure 1, it can be seen from the figure that Co-doped ZnO quantum dot is evenly distributed on quaternary alkylphosphonium salt modified montmorillonoid
On lamella, show the successful preparation of quaternary alkylphosphonium salt modified montmorillonoid load Co-doped ZnO quantum dot nano complex antimicrobials.Figure
It is 2a) that quaternary alkylphosphonium salt modified montmorillonoid prepared by the present invention loads Co-doped ZnO quantum dot nano composite antibacterial with Fig. 2 b)
Antibacterial effect figure of the agent to Escherichia coli;Fig. 3 is that quaternary alkylphosphonium salt modified montmorillonoid prepared by the present invention loads Co-doped ZnO
Minimal inhibitory concentration test chart of the quantum dot nano complex antimicrobials to Escherichia coli.It can be seen from the figure that quaternary alkylphosphonium salt is modified
Montmorillonite load Co-doped ZnO quantum dot nano complex antimicrobials are 1.8mg/mL to the minimal inhibitory concentration of Escherichia coli.
Embodiment 2:
Step 1: weighing 8g sodium-based montmorillonite and be scattered in 150mL deionized water, and 80 DEG C of heating water baths stir 30min;It will
4g hexadecyl tributyl phosphonium bromide is scattered in 75mL deionized water, and after it is completely dissolved, sodium-based montmorillonite dispersion is added
In liquid, after stirring 2h under 70 DEG C of condition of water bath heating, stands 1h and wait for its cooling, it is taken out repeatedly with Vacuum filtration device
Filter washing, up to no Br ion detection goes out (to use AgNO3It examines).After 60 DEG C of drying for 24 hours, fine powder is ground into get quaternary phosphine
Salt modified montmorillonoid;
Step 2: the four acetate hydrate cobalts for weighing 5mmol acetic acid dihydrate zinc and 0.035mmol respectively are scattered in 100mL
In dehydrated alcohol, after mixing evenly, the modified MMT of 40mg quaternary alkylphosphonium salt is added, pours into three-necked flask, 70 DEG C of heating in water bath for reaction
1.5h is to get zinc, cobalt, quaternary alkylphosphonium salt modified montmorillonoid mixing precursor solution;It is molten that 100mL ethyl alcohol is added in 7mmol lithium hydroxide
In liquid, after magnetic agitation 30min, gained aqueous slkali is added drop-wise to zinc prepared by early period, cobalt, quaternary alkylphosphonium salt modified montmorillonoid mixes
In precursor solution, after mixing, 100mL deionized water is added until solution becomes in magnetic agitation 30min after reaction
Milky, magnetic agitation 10min, stands, cleaning, is centrifuged to get the load cobalt doped oxidation of quaternary alkylphosphonium salt modified montmorillonoid at room temperature
Zinc quantum dot nano complex antimicrobials.
Embodiment 3:
Step 1: weighing 5g sodium-based montmorillonite and be scattered in 100mL deionized water, and 80 DEG C of heating water baths stir 30min;It will
2.5g hexadecyl tributyl phosphonium bromide is scattered in 50mL deionized water, and after it is completely dissolved, sodium-based montmorillonite point is added
In dispersion liquid, after stirring 2h under 80 DEG C of condition of water bath heating, stands 2h and wait for its cooling, it is carried out repeatedly with Vacuum filtration device
Filtering and washing, up to no Br ion detection goes out (to use AgNO3It examines).After 60 DEG C of drying for 24 hours, fine powder is ground into get season
Phosphonium salt modified montmorillonoid;
Step 2: the four acetate hydrate cobalts for weighing 5mmol acetic acid dihydrate zinc and 0.035mmol respectively are scattered in 100mL
In dehydrated alcohol, after mixing evenly, the modified MMT of 60mg quaternary alkylphosphonium salt is added, pours into three-necked flask, 60 DEG C of heating in water bath for reaction
2h is to get zinc, cobalt, quaternary alkylphosphonium salt modified montmorillonoid mixing precursor solution;100mL ethanol solution is added in 7mmol lithium hydroxide
In, after magnetic agitation 30min, before gained aqueous slkali is added drop-wise to zinc prepared by early period, the mixing of cobalt, quaternary alkylphosphonium salt modified montmorillonoid
It drives in liquid solution, after mixing, 100mL deionized water is added until solution becomes cream in magnetic agitation 30min after reaction
White, magnetic agitation 10min, stands, cleaning, is centrifuged to get quaternary alkylphosphonium salt modified montmorillonoid load Co-doped ZnO at room temperature
Quantum dot nano complex antimicrobials.
Embodiment 4:
Step 1: weighing 8g sodium-based montmorillonite and be scattered in 150mL deionized water, and 80 DEG C of heating water baths stir 30min;It will
4g hexadecyl tributyl phosphonium bromide is scattered in 75mL deionized water, and after it is completely dissolved, sodium-based montmorillonite dispersion is added
In liquid, after stirring 2h under 90 DEG C of condition of water bath heating, stands 2h and wait for its cooling, it is taken out repeatedly with Vacuum filtration device
Filter washing, up to no Br ion detection goes out (to use AgNO3It examines).After 60 DEG C of drying for 24 hours, fine powder is ground into get quaternary phosphine
Salt modified montmorillonoid;
Step 2: the four acetate hydrate cobalts for weighing 5mmol acetic acid dihydrate zinc and 0.035mmol respectively are scattered in 100mL
In dehydrated alcohol, after mixing evenly, the modified MMT of 70mg quaternary alkylphosphonium salt is added, pours into three-necked flask, 90 DEG C of heating in water bath for reaction
0.5h is to get zinc, cobalt, quaternary alkylphosphonium salt modified montmorillonoid mixing precursor solution;It is molten that 100mL ethyl alcohol is added in 7mmol lithium hydroxide
In liquid, after magnetic agitation 30min, gained aqueous slkali is added drop-wise to zinc prepared by early period, cobalt, quaternary alkylphosphonium salt modified montmorillonoid mixes
In precursor solution, after mixing, 100mL deionized water is added until solution becomes in magnetic agitation 30min after reaction
Milky, magnetic agitation 10min, stands, cleaning, is centrifuged to get the load cobalt doped oxidation of quaternary alkylphosphonium salt modified montmorillonoid at room temperature
Zinc quantum dot nano complex antimicrobials.
Nano antibacterial agent prepared by the present invention is to the minimal inhibitory concentration of Escherichia coli up to 1.8mg/mL.
Finally it should be noted that: the above examples are only used to illustrate the technical scheme of the present invention rather than its limitations, to the greatest extent
Pipe is described the invention in detail referring to above-described embodiment, it should be understood by those ordinary skilled in the art that: still may be used
With modifications or equivalent substitutions are made to specific embodiments of the invention, and repaired without departing from any of spirit and scope of the invention
Change or equivalent replacement, should all cover in present claims range.
Claims (6)
1. a kind of preparation method of quaternary alkylphosphonium salt modified montmorillonoid load Co-doped ZnO quantum dot nano complex antimicrobials, special
Sign is to include the following steps:
Step 1: being that 1:0.007 weighs acetic acid dihydrate zinc respectively and four acetate hydrate cobalts are scattered in nothing by zinc and cobalt molar ratio
In water-ethanol, after mixing evenly, be (0.03-0.07) An quaternary alkylphosphonium salt modified montmorillonoid and acetic acid dihydrate zinc mass ratio: 1 is added
Quaternary alkylphosphonium salt modified montmorillonoid, 60-90 DEG C of heating in water bath for reaction 0.5-2h mix forerunner to get zinc, cobalt, quaternary alkylphosphonium salt modified montmorillonoid
Liquid solution;
Step 2: magnetic agitation in lithium hydroxide addition ethanol solution is uniform, by Zn in acetic acid dihydrate zinc and lithium hydroxide2 +:OH-Molar ratio be 1:1.4 by gained aqueous slkali be added drop-wise to step 1 preparation zinc, cobalt, quaternary alkylphosphonium salt modified montmorillonoid mix before
It drives in liquid solution, after mixing, magnetic agitation to reaction terminates;Then deionized water is gradually added into until solution becomes milky white
Color stands, cleaning, is centrifuged to get quaternary alkylphosphonium salt modified montmorillonoid load Co-doped ZnO quantum dot nano complex antimicrobials.
2. quaternary alkylphosphonium salt modified montmorillonoid load Co-doped ZnO quantum dot nano complex antimicrobials as described in claim 1
Preparation method, it is characterised in that the preparation process of the quaternary alkylphosphonium salt modified montmorillonoid is as follows:
Step 1.1: weighing appropriate sodium-based montmorillonite and be scattered in deionized water, 80 DEG C of heating water bath stirring 30min obtain sodium base illiteracy
De- soil dispersion liquid;Hexadecyl tributyl phosphonium bromide is taken by hexadecyl tributyl phosphonium bromide and sodium-based montmorillonite mass ratio 1:2
It is scattered in deionized water, after it is completely dissolved, is added in sodium-based montmorillonite dispersion liquid, in 60-80 DEG C of condition of water bath heating
After lower stirring 2h, stands 1-2h and wait for its cooling;
Step 1.2: filtering and washing repeatedly being carried out to cooling solution, until no Br ion detection goes out, then dries, be ground into carefully
Small powder is to get quaternary alkylphosphonium salt modified montmorillonoid.
3. quaternary alkylphosphonium salt modified montmorillonoid load Co-doped ZnO quantum dot nano complex antimicrobials as described in claim 1
Preparation method, it is characterised in that: the temperature when dropwise addition alkali source is 20-30 DEG C.
4. quaternary alkylphosphonium salt modified montmorillonoid load Co-doped ZnO quantum dot nano complex antimicrobials as described in claim 1
Preparation method, it is characterised in that: centrifugal treating in the step 2, centrifugation rate 8000rpm/min.
5. quaternary alkylphosphonium salt modified montmorillonoid load Co-doped ZnO quantum dot nano complex antimicrobials as described in claim 1
Preparation method, it is characterised in that: deionized water is added after solution becomes milky at room temperature again in solution in the step 2
Magnetic agitation 10min.
6. a kind of quaternary alkylphosphonium salt modified montmorillonoid such as any one of claim 1-5 the method preparation loads Co-doped ZnO amount
Son point composite nano germicide.
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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CN114752140A (en) * | 2019-12-23 | 2022-07-15 | 青岛科技大学 | Low-density functional elastomer material |
CN111838148A (en) * | 2020-07-14 | 2020-10-30 | 陕西科技大学 | Preparation method of cobalt-doped zinc oxide/molybdenum disulfide nano composite antibacterial agent |
CN111889055A (en) * | 2020-07-28 | 2020-11-06 | 黄俊雄 | Novel elastomer coating production device and process thereof |
CN114345316A (en) * | 2022-01-12 | 2022-04-15 | 上海大学 | TiO22Preparation method of magnesium lithium silicate composite photocatalyst |
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