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Preparation method of inorganic nano material for efficient and lasting disinfection and sterilization

An inorganic nano-material, disinfection and sterilization technology, applied in the field of nano-material preparation and photocatalysis, can solve the problems of corrosion, instability, and irritation of chlorine-containing disinfectant, and achieve simple operation process, small impact on human body and environment, and wide-ranging The effect of spectrum antibacterial disinfection

Active Publication Date: 2022-07-22
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are more or less deficiencies in the disinfectants currently on the market. For example, chlorine-containing disinfectants are irritating, corrosive and unstable. Alcohol needs to maintain its effective concentration above 75% and has strict requirements on the storage environment. Liquid and quaternary ammonium salt disinfectants are not effective against the coronavirus, etc.

Method used

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  • Preparation method of inorganic nano material for efficient and lasting disinfection and sterilization
  • Preparation method of inorganic nano material for efficient and lasting disinfection and sterilization
  • Preparation method of inorganic nano material for efficient and lasting disinfection and sterilization

Examples

Experimental program
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Effect test

Embodiment 1

[0026] (1) Combine 200 mg ZnO nanosheets with 100 mg Zn(AC) 2 ·2H 2 O. 100 mg of 2-methylimidazole was dissolved in 60 mL of N,N-dimethylformamide, stirred for 30 min, solvothermally reacted at 90 °C for 6 h, and centrifuged to obtain Zn-MOFs / ZnO photocatalyst.

[0027] (2) Uniformly disperse 30 mg Zn-MOFs / ZnO photocatalyst into AgNO containing 3 wt% 3 30 g methanol solution, stirred in the dark for 20 minutes, illuminated with a 300W xenon light with a wavelength greater than 400 nm and continuously stirred for 5 minutes, and centrifuged to dry to obtain a gray powder, which was heated in 5% H 2 The inorganic nanomaterials (AgZn@Ag-Zn-MOFs / ZnO) were obtained by calcining at 370°C for 1 h under / Ar atmosphere.

[0028] The photocatalytic bactericidal performance test was carried out on the inorganic nanomaterials obtained above: an equal amount of the target photocatalytic bactericide was added to the phosphate buffer solution containing the same concentration of Escherichi...

Embodiment 2

[0030] (1) Combine 300 mg ZnO nanosheets with 50 mg Zn(AC) 2 ·2H 2 O. 50 mg of 2-methylimidazole was dissolved in 60 mL of N,N-dimethylformamide, stirred for 30 min, solvothermally reacted at 100 °C for 6 h, and centrifuged to obtain Zn-MOFs / ZnO photocatalyst.

[0031] (2) 30 mg of Zn-MOFs / ZnO nanosheets were uniformly dispersed to contain 3 wt% AgNO 3 30g methanol solution, stirred in the dark for 30 minutes, illuminated under 400nm 300W xenon lamp and continuously stirred for 10min, centrifuged and dried to obtain a powder sample, and the powder was immersed in 10% H 2 The inorganic nanomaterials (AgZn@Ag-Zn-MOFs / ZnO) with high efficiency and long-term sterilization were obtained by calcining at 340 degrees Celsius for 1 h in / Ar atmosphere.

[0032] The antibacterial performance was tested according to the method of Example 1, and it was observed that the number of colonies in the medium of the inorganic nanomaterial was zero, which proved that the sterilization rate was...

Embodiment 3

[0034] (1) 200mg TiO 2 Nanotubes with 20mg Zn(AC) 2 ·2H 2 O and 20 mg of 2-methylimidazole were dissolved in 60 mL of N,N-dimethylformamide, stirred for 30 min, solvothermally reacted at 160 °C for 6 h, and centrifuged to obtain Zn-MOFs / TiO 2 catalyst of light.

[0035](2) 30 mg Zn-MOFs / TiO 2 uniformly dispersed to contain 3wt% AgNO 3 In 30g methanol solution, after stirring for 20 minutes in the dark, under 400nm 300W xenon lamp illumination and continuous stirring for 5min centrifugation and drying to obtain powder samples. 2 Inorganic nanomaterials (AgZn@Ag-Zn-MOFs / TiO) were obtained by calcining at 360 degrees Celsius for 1 h in an Ar atmosphere. 2 ).

[0036] The antibacterial performance was tested according to the method of Example 1, and it was observed that the number of colonies in the medium of the inorganic nanomaterial was zero, which proved that the sterilization rate was >99%, and it had significant disinfection and sterilization performance.

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Abstract

The preparation method comprises the following steps: firstly, growing a compact ultrathin zinc organic framework heterostructure in situ to realize that O2 and OH <-> are effectively adsorbed and activated by metal sites under sunlight to form free radicals with strong oxidizing activity; furthermore, a bimetallic coupling silver-zinc organic framework heterogeneous material is prepared through Ag ion exchange, abundant antibacterial active sites are provided, and interface transfer between electrons and oxidative stress generation for killing bacteria are promoted; ag < + > in the solution and Zn < 2 + > on the surface of the catalyst are reduced to form superfine AgZn nano alloy particles, so that the antibacterial broad spectrum of the material is expanded, and the antibacterial rate of the material is increased. The preparation method disclosed by the invention is simple in process and mild in reaction condition; raw materials and equipment are cheap, easily available and low in cost; the synthesis time is short, the efficiency is high, efficient, lasting and safe broad-spectrum antibacterial disinfection is realized, and the method is suitable for large-scale production.

Description

technical field [0001] The invention belongs to the field of nanometer material preparation and photocatalysis, and in particular relates to a preparation method of an efficient and durable sterilization and sterilization inorganic nanometer material. Background technique [0002] Every epidemic is a great test for human beings, and the invention of disinfectant has promoted the development of health and hygiene in all countries in the world. Faced with the huge demand for disinfectants and the high requirements for sterilization and disinfection effects, it is urgent to develop efficient, durable and low-toxic disinfectants. The recommendations of the National Health and Health Commission show that the current disinfectants that can effectively kill viruses are mainly medium and high-efficiency disinfectants, including: chlorine-containing compound disinfectants, peroxide disinfectants, and alcohol-based disinfectants. The mechanism of action of chlorine-containing disinfe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N59/16A01N25/10A01P1/00
CPCA01N59/16A01N25/10
Inventor 董文钧汤薇张立国高晴韩一铭王鑫
Owner UNIV OF SCI & TECH BEIJING
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