Functionalized graphene oxide antibacterial material and preparation method thereof
An antibacterial material and a functionalized technology are applied in the field of functionalized graphene oxide antibacterial materials and their preparation, and can solve the problems of unstable antibacterial materials, easy shedding of silver nanoparticles, antibacterial properties, and unfavorable long-term use.
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Embodiment 1
[0024] A preparation method of graphene oxide-based antibacterial material, comprising the steps of:
[0025] 1) Add 40ml of concentrated sulfuric acid to a 250ml three-necked flask and heat to 90°C, then mechanically stir, add 4g of potassium persulfate and 4g of phosphorus pentoxide, cool down to 80°C, add 5g of graphite, and react in a constant temperature water bath for 4.5 h, stop the reaction, after cooling to room temperature, dilute with 200ml distilled water, filter, and repeat washing with distilled water three times, dry to obtain pre-oxidized graphite.
[0026] 2) Add 60ml of concentrated sulfuric acid (in an ice-water bath) to a 250ml three-necked flask, stir mechanically for 30min, then add 2.5g of pre-oxidized graphite flakes and 0.5g of sodium nitrate, wait until the solid is completely dissolved, then slowly add 5g of potassium permanganate React for 30 minutes; then raise the temperature to 35°C, add 230ml of distilled water dropwise with a constant pressure ...
Embodiment 2
[0033] A preparation method of graphene oxide-based antibacterial material, comprising the steps of:
[0034] 1) Add 40ml of concentrated sulfuric acid to a 250ml three-necked flask and heat to 90°C, then mechanically stir, add 4g of potassium persulfate and 4g of phosphorus pentoxide at the same time, cool down to 80°C, then add 5g of graphite, and react in a constant temperature water bath for 4.5 h, stop the reaction, after cooling to room temperature, dilute with 200ml distilled water, filter, and repeat washing with distilled water three times, dry to obtain pre-oxidized graphite.
[0035] 2) Add 60ml of concentrated sulfuric acid (in an ice-water bath) to a 250ml three-necked flask, stir mechanically for 30min, then add 2.5g of pre-oxidized graphite flakes and 0.5g of sodium nitrate, until the solid is completely dissolved, slowly add 7.5g of potassium permanganate After reacting for 30min. Then raise the temperature to 35°C, add 230ml of distilled water dropwise with a...
Embodiment 3
[0040] A preparation method of graphene oxide-based antibacterial material, comprising the steps of:
[0041] 1) Add 50ml of concentrated sulfuric acid to a 250ml three-necked flask and heat to 95°C, then mechanically stir, add 4g of potassium persulfate and 4g of phosphorus pentoxide at the same time, cool down to 75°C, then add 5g of graphite, and react in a constant temperature water bath for 4.5 h, stop the reaction, after cooling to room temperature, dilute with 200ml distilled water, filter, and repeat washing with distilled water three times, dry to obtain pre-oxidized graphite.
[0042] 2) Add 70ml of concentrated sulfuric acid (in an ice-water bath) to a 250ml three-necked flask, stir mechanically for 30min, then add 2.5g of pre-oxidized graphite flakes and 0.5g of sodium nitrate, and slowly add 7.5g of potassium permanganate until the solid is completely dissolved After reacting for 30min. Then raise the temperature to 35°C, add 230ml of distilled water dropwise wit...
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