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Application of reduced metal oxide semiconductor nanomaterial in antibacterial material

A technology of oxide semiconductors and nanomaterials, applied in the field of antibacterial nanomaterials, can solve the problems of single antibacterial mechanism, antibacterial activity to be improved, and limit the application range of antibacterial performance, so as to improve utilization, inhibit nucleic acid transcription and replication, and inhibit cell wall synthesis Effect

Pending Publication Date: 2021-12-24
CIXI INST OF BIOMEDICAL ENG NINGBO INST OF MATERIALS TECH & ENG CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

2) The antibacterial mechanism is single, and the antibacterial activity needs to be improved
TiO 2 Relying on ultraviolet light excitation to generate active oxygen to destroy the bacterial structure, antibacterial activity cannot be produced without ultraviolet light, which severely limits the application range of its antibacterial properties

Method used

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  • Application of reduced metal oxide semiconductor nanomaterial in antibacterial material
  • Application of reduced metal oxide semiconductor nanomaterial in antibacterial material
  • Application of reduced metal oxide semiconductor nanomaterial in antibacterial material

Examples

Experimental program
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Effect test

Embodiment 1

[0049] The black TiO of embodiment 1 different degree of reduction 2 Preparation of spherical nanoparticles

[0050] Take anatase white TiO with a particle size of 25 nm 2 3 parts of spherical nanoparticle powder, 10 grams each, and 3 parts of sodium borohydride powder, 5 grams each, were mixed and ground uniformly at room temperature respectively. Put the mixed powder into a tube furnace, raise the temperature to 350°C at a rate of 10°C / min under the protection of argon, and heat and react for 1, 2, and 3 hours respectively. After the reaction, the obtained powders were respectively dispersed into ultrapure water, centrifuged at 12,000 rpm for 20 minutes, repeated 5 times, then dispersed in absolute ethanol, and centrifuged at 12,000 rpm for 20 minutes to remove residual The reactant, the centrifuged precipitate was placed in an oven at 80°C, and after drying, black TiO with different degrees of reduction was obtained. 2 Spherical nanoparticles, respectively marked as 1#, ...

Embodiment 2

[0051] Embodiment 2 black ZrO 2 Preparation of spherical nanoparticles

[0052] Take 5.0 g of ZrO 2 Spherical nanoparticle powder and 1 gram of sodium borohydride powder were mixed and ground uniformly at room temperature. Put the mixed powder into a tube furnace, raise the temperature to 350° C. at a rate of 10° C. / min under the protection of argon, and heat and react for 4 hours respectively. After the reaction, the powder was dispersed into ultrapure water, centrifuged at 12,000 rpm for 20 minutes, repeated 3 times, then dispersed in absolute ethanol, and centrifuged at 12,000 rpm for 20 minutes to remove residual reactants. The centrifuged precipitate was placed in an oven at 80°C, and black ZrO was obtained after drying. 2 spherical nanoparticles.

Embodiment 3

[0053] Embodiment 3 black TiO 2 Preparation of hollow nanospheres

[0054] Take 5 ml of tetraethyl orthosilicate and add it to 100 ml of the mixed solution of ethanol, ammonium hydroxide and water (volume ratio of ethanol: ammonium hydroxide: water = 95:4:1), and stir at 25°C 8 hours, get SiO 2 kernel. 5 ml of isopropyl titanate was added to the reaction solution, and stirring was continued for 8 hours. After the reaction, centrifuge at 12,000 rpm for 30 minutes, repeat washing and centrifugation 3 times to obtain SiO 2 -TiO 2 Core-shell nanospheres. In order to remove SiO 2 core, the SiO 2 -TiO 2 The core-shell nanospheres were dispersed in 1 mol / L sodium hydroxide solution and stirred for 6 hours. After the reaction, centrifuged at 12,000 rpm for 30 minutes, repeated washing and centrifuging for 3 times, and dried at 80°C for 6 hours to obtain white TiO 2 Hollow nanosphere powder. Take 1 gram of white TiO 2 Hollow nanospheres and 0.3 g of sodium borohydride were m...

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Abstract

The invention discloses an application of a reduced metal oxide semiconductor nanomaterial in an antibacterial material. The antibacterial material can be excited by ultraviolet light, visible light and near-infrared light with the wavelength of 280-1700 nm to generate reactive oxygen free radicals and heat, a killing effect on pathogenic microorganisms is achieved, and compared with white TiO2, the utilization of the excitation light wavelength range is greatly improved. The antibacterial material can generate an inhibition effect on pathogen microproduction through multiple mechanisms. Wide application prospects are realized in the aspects of antibacterial dressings, antibacterial consumables, mask surface antibacterial and self-cleaning coatings and the like.

Description

technical field [0001] The application relates to the application of reduced metal oxide semiconductor nanomaterials in antibacterial materials, belonging to the field of antibacterial nanomaterials. Background technique [0002] TiO 2 Nanomaterials are wide-bandgap semiconductor materials with excellent photocatalytic performance, stable structure, hydrophilic surface, and good biocompatibility, and are considered to be the most effective and environmentally friendly photocatalysts. It is widely used in clean energy, food, cosmetics, biomedicine such as antibacterial materials and other fields. As a UV-excited photocatalytic material, TiO 2 It can kill Gram-negative and Gram-positive bacteria, hepatitis B virus, herpes virus, etc., but the killing effect on bacterial spores is average. [0003] TiO 2 The active oxygen free radicals generated mainly through ultraviolet excitation destroy the structure of pathogens, thereby killing pathogenic bacteria. But TiO 2 If nano...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K41/00A61K49/00A61K49/18A61K49/22A61P31/04C01G23/047B82Y40/00C01G25/02C01G23/053C01B32/194C01B32/15C01G9/02C01G49/08
CPCC01G23/08B82Y40/00C01G25/02C01G23/053C01B32/194C01B32/15C01G9/02C01G49/08A61K41/0052A61K41/0057A61K49/0002A61K49/0019A61K49/0093A61K49/1818A61K49/225A61P31/04C01P2004/32C01P2004/34C01P2004/16C01P2004/20C01P2004/13C01P2004/30C01P2004/80C01P2004/04C01P2002/84
Inventor 任文智吴爱国徐晨马雪华陈天翔
Owner CIXI INST OF BIOMEDICAL ENG NINGBO INST OF MATERIALS TECH & ENG CHINESE ACAD OF SCI
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