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Preparation method of cobalt-doped zinc oxide/molybdenum disulfide nano composite antibacterial agent

A technology of molybdenum disulfide and nanocomposite, applied in botany equipment and methods, fungicides, biocides, etc., can solve the problems of electron-hole recombination, poor biocompatibility, easy aggregation, etc., and achieve broad-spectrum antibacterial Strong antibacterial activity, high biocompatibility

Inactive Publication Date: 2020-10-30
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Relevant studies have shown that the smaller the size of nano-ZnO, the better the antibacterial performance, but the small-sized nano-ZnO itself has a large specific surface area, is easy to agglomerate, and has a wide band gap, poor biocompatibility, and easy electron-hole recombination. It is not conducive to its high-efficiency antibacterial performance

Method used

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  • Preparation method of cobalt-doped zinc oxide/molybdenum disulfide nano composite antibacterial agent
  • Preparation method of cobalt-doped zinc oxide/molybdenum disulfide nano composite antibacterial agent
  • Preparation method of cobalt-doped zinc oxide/molybdenum disulfide nano composite antibacterial agent

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Experimental program
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Effect test

Embodiment 1

[0028] Step 1: Weigh 0.3g of sodium molybdate and 0.6g of L-cysteine ​​and disperse them in 50mL of deionized water, and stir for 30min until they are evenly dispersed. Put the uniformly dispersed solution into an ultrasonic cell pulverizer (400w) for ultrasonic treatment for 20 minutes, then take out the solution and pour it into a polytetrafluoroethylene lining, and put it into a reaction kettle. Subsequently, the reactor was put into an oven to react at a temperature of 180° C. for 30 h. Finally, centrifuge, wash, and purify to obtain molybdenum disulfide nanosheets.

[0029] Step 2: Weigh zinc acetate dihydrate and cobalt acetate tetrahydrate respectively according to the molar ratio of zinc and cobalt as 1:0.007 and disperse them in absolute ethanol. After stirring evenly, the mass ratio of molybdenum disulfide nanosheets to zinc acetate dihydrate Add molybdenum disulfide nanosheets at a ratio of 0.03:1, heat and react in a water bath at 80°C for 2 hours to obtain a mixe...

Embodiment 2

[0033] Step 1: Weigh 0.3g of sodium molybdate and 0.6g of L-cysteine ​​and disperse them in 50mL of deionized water, and stir for 30min until they are evenly dispersed. Put the uniformly dispersed solution into an ultrasonic cell pulverizer (400w) for ultrasonic treatment for 20 minutes, then take out the solution and pour it into a polytetrafluoroethylene lining, and put it into a reaction kettle. Subsequently, the reactor was put into an oven to react at a temperature of 180° C. for 30 h. Finally, centrifuge, wash, and purify to obtain molybdenum disulfide nanosheets.

[0034] Step 2: Weigh zinc acetate dihydrate and cobalt acetate tetrahydrate respectively according to the molar ratio of zinc and cobalt as 1:0.007 and disperse them in absolute ethanol. After stirring evenly, the mass ratio of molybdenum disulfide nanosheets to zinc acetate dihydrate Add molybdenum disulfide nanosheets at a ratio of 0.025:1, heat and react in a water bath at 80°C for 2 hours to obtain a mix...

Embodiment 3

[0037] Step 1: Weigh 0.3g of sodium molybdate and 0.6g of L-cysteine ​​and disperse them in 50mL of deionized water, and stir for 30min until they are evenly dispersed. Put the uniformly dispersed solution into an ultrasonic cell pulverizer (400w) for ultrasonic treatment for 20 minutes, then take out the solution and pour it into a polytetrafluoroethylene lining, and put it into a reaction kettle. Subsequently, the reactor was put into an oven to react at a temperature of 180° C. for 30 h. Finally, centrifuge, wash, and purify to obtain molybdenum disulfide nanosheets.

[0038] Step 2: Weigh zinc acetate dihydrate and cobalt acetate tetrahydrate respectively according to the molar ratio of zinc and cobalt as 1:0.007 and disperse them in absolute ethanol. After stirring evenly, the mass ratio of molybdenum disulfide nanosheets to zinc acetate dihydrate Add molybdenum disulfide nanosheets at a ratio of 0.02:1, heat and react in a water bath at 80°C for 2 hours to obtain a mixe...

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Abstract

The invention discloses a preparation method of a cobalt-doped zinc oxide / molybdenum disulfide nano composite antibacterial agent. The advantages of large specific surface area, high surface adsorption capacity and the like of molybdenum disulfide nanosheets are utilized; the preparation method comprises the steps: adsorbing bacteria to the surface of the molybdenum disulfide nanosheets, then cooperatively loading cobalt (Co) doped zinc oxide (ZnO) on the surface and between layers of the molybdenum disulfide nanosheets to play an efficient antibacterial role to kill the bacteria, and thus finally preparing the novel nano composite antibacterial agent with good biocompatibility and high antibacterial activity. The cobalt-doped ZnO quantum dot / molybdenum disulfide nano composite antibacterial agent prepared by the method has the advantages of good biocompatibility, strong broad-spectrum antibacterial effect and the like, and the minimum inhibitory concentration on escherichia coli can reach 0.25 mg / mL.

Description

technical field [0001] The invention relates to a preparation method of a high-efficiency antibacterial agent, in particular to a preparation method of a cobalt-doped zinc oxide / molybdenum disulfide nanocomposite antibacterial agent. Background technique [0002] In recent years, bacterial infections have been increasingly recognized as an important cause of high morbidity and mortality. The overuse of antibiotics in order to effectively destroy bacteria has led to the emergence of "superbugs". In today's society, human health has become a global hot topic, and infectious diseases are still one of the biggest health challenges in the world. The development of new rapid antimicrobial agents that do not develop resistance to conventional antimicrobial agents is particularly important and urgent because they are increasingly less effective against many microorganisms. In recent years, people have conducted extensive research on nanomaterials. Compared with traditional materia...

Claims

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Application Information

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IPC IPC(8): A01N25/08A01N59/16A01P1/00A01P3/00
CPCA01N25/08A01N59/16
Inventor 刘俊莉沈佳昊王宇涵刘辉
Owner SHAANXI UNIV OF SCI & TECH
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