Light-driven nano-antibacterial agent and preparation method thereof

A nano-antibacterial, light-driven technology, applied in the fields of botanical equipment and methods, fungicides, nanotechnology, etc., can solve the problems of large band gap, easy recombination of photogenerated electron-hole pairs, and restricted application scope, etc. Achieve strong drug resistance and good antibacterial effect

Active Publication Date: 2017-11-24
四川华运天晨新材料技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, as a photocatalytic antibacterial agent, ZnO itself has problems such as large band gap and easy recombination of photogenerated electron-hole pairs, which restrict its application range.

Method used

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  • Light-driven nano-antibacterial agent and preparation method thereof
  • Light-driven nano-antibacterial agent and preparation method thereof

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preparation example Construction

[0027] The preparation method of light-driven type nano antibacterial agent that the present invention relates to comprises the following steps:

[0028] Step 1: Weigh 3-6g of citric acid into a three-neck flask, heat to 200°C and react for 20-50min to obtain an orange solid;

[0029] Next, slowly add NaOH aqueous solution under stirring state, the amount of NaOH added is 1g, after ultrasonic treatment until the solid solution is completely dissolved, gradually add HCl aqueous solution to adjust the pH of the solution to 7; the mass volume fraction of NaOH aqueous solution is 10-40 mg / mL ; The molar volume fraction of HCl aqueous solution is 2-4mol / L;

[0030] Finally, the resulting liquid was dialyzed in ultrapure water for 1 day to obtain a graphene quantum dot (GQD) solution.

[0031] Step 2: After drying the graphene quantum dot solution obtained in step 1, weigh 0.05 to 0.3 g of graphene quantum dots and add them to diethylene glycol for ultrasonic treatment for 20 to 60...

Embodiment 1

[0037] Step 1: Weigh 4g of citric acid into a three-necked flask, heat to 200°C for a certain period of time to obtain an orange solid; then, slowly add 100mL of 10 mg / mL NaOH aqueous solution under stirring, and ultrasonicate for a period of time until the solid solution is completely dissolved Finally, gradually add 2 mol / L HCl dropwise to adjust the pH of the solution to 7; finally, dialyze the obtained liquid in ultrapure water for 1 day to obtain the GQD solution;

[0038] Step 2: After drying the GQD solution obtained above, weigh 0.1 g of GQD and add it to 120 mL of diethylene glycol for ultrasonic treatment for 30 min; then, transfer it to a three-necked flask with a reflux condenser and an electric stirrer, and slowly add 0.768 g Zinc stearate was reacted at 200°C for 2 hours to obtain a dark brown liquid. After the product was centrifuged and washed 3 times with toluene, it was dialyzed with ultrapure water for 2 days, and the suspended matter was filtered out to obta...

Embodiment 2

[0041] Step 1: Weigh 5g of citric acid into a three-necked flask, heat to 200°C for 35 minutes to react to obtain an orange solid; then, slowly add 50mL of 20 mg / mL NaOH aqueous solution under stirring, and sonicate for 30 minutes until the solid solution is completely dissolved. Gradually add 4 mol / L HCl dropwise to adjust the pH of the solution to 7; finally, dialyze the obtained liquid in ultrapure water for 1 day to obtain the GQD solution;

[0042] Step 2: After drying the GQD solution obtained above, weigh 0.2g of GQD and add it to 200mL diethylene glycol for ultrasonic treatment for 40min; then, transfer it to a three-necked flask with a reflux condenser and an electric stirrer, and slowly add 1.536g Zinc stearate was reacted at 180°C for 2 hours to obtain a dark brown liquid. After the product was centrifuged and washed with toluene for 3 times, it was dialyzed with ultrapure water for 2 days, and the suspended matter was filtered to obtain the nano-antibacterial agent....

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Abstract

The invention relates to a light-driven nano-antibacterial agent and a preparation method thereof. The preparation method comprises the steps of heating citric acid and reacting so as to obtain orange solid; adding an NaOH water solution and performing ultrasonic treatment till the solid is dissolved completely, and then regulating pH of the solution to be 7; dialyzing the obtained solution in ultra-pure water so as to obtain a graphene quantum dot solution; drying and then adding the solution into diglycol and performing ultrasonic treatment; adding zinc stearate and reacting so as to obtain dark brown liquid; and centrifugally washing a product with methylbenzene, dialyzing in ultra-pure water, and filtering to remove suspended matters so as to obtain the nano-antibacterial agent. Compared with a traditional antibacterial agent, the nano-antibacterial agent prepared by the method has the advantages of being safe and environment-friendly, and having a good antibacterial effect and high drug resistance. The nano-antibacterial agent prepared through the method can kill 99.78% of colibacillus after being exposed in 100w of ultraviolet light for 1min.

Description

technical field [0001] The invention relates to a novel high-efficiency antibacterial agent, in particular to a light-driven nano-antibacterial agent and a preparation method thereof. Background technique [0002] With the development of economy and industry, energy crisis and environmental pollution have become two major themes in the field of science and technology today. In 2013, "smog" became the key word of the year. In January of that year, only 5 days in Beijing were not smog days. In 2016, "smog" has developed from "smog locks the capital" to "ambush on all sides", and 17 provinces, regions and cities across the country are affected by smog. Researchers from the University of Gothenburg in Sweden found that there were 64.4 species of bacterial communities containing drug-resistant genes in Beijing's smog weather. All kinds of bacterial infections, especially the emergence of some drug-resistant bacteria, pose a great threat to human health. Therefore, the research...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N59/16A01N59/00A01N37/02A01P1/00A01P3/00B82Y30/00B82Y40/00A61L9/20
CPCA01N37/02A01N59/00A01N59/16A61L9/205B82Y30/00B82Y40/00
Inventor 刘俊莉陈少伟马建中刘辉
Owner 四川华运天晨新材料技术有限公司
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