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Preparation of porous graphene loaded low-light photocatalyst-nano-silver composite antiviral powder

A porous graphene, low-light technology, applied in the directions of disinfection, disinfectants, botanical equipment and methods, etc., can solve the problems of low data and poor persistence of infectious virus killing rate, and achieve high sterilization and antivirus efficiency, Expand the application field and scope and improve the effect of contact sterilization and disinfection capabilities

Active Publication Date: 2020-12-29
聚治苏州纳米科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The domestic market basically uses organic antibacterial agents, and a small amount of silver-loaded zirconium phosphate is used as an additive to make products with antibacterial properties, but its killing rate for infectious viruses has the disadvantages of low data and poor persistence.

Method used

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  • Preparation of porous graphene loaded low-light photocatalyst-nano-silver composite antiviral powder
  • Preparation of porous graphene loaded low-light photocatalyst-nano-silver composite antiviral powder
  • Preparation of porous graphene loaded low-light photocatalyst-nano-silver composite antiviral powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Preparation of highly dispersed nano-graphene microsheet slurry: 3g of expanded graphite was added to 992.4g of aqueous solution, and 3g of dispersant CTAB, 0.1g of defoamer DELTA-FC1501, 0.5g of wetting In the aqueous solution of agent TEGO245, stir and mix, emulsifier pre-disperse. Then grind and disperse in a sand mill, the filling rate of zirconium beads is 70%, the diameter of zirconium beads is 0.3mm, and the grinding line speed is 12m / s. Under the synergistic effect of 1g intercalation agent PVP, dispersant and grinding shear force, Prepare nano-graphene microsheet slurry with a diameter of about 5 microns and a thickness of ≤10 layers.

[0027] Preparation of zinc oxide weak-light photocatalyst slurry: Add 20g of zinc nitrate to 72.8g of ethanol and stir, then add 0.2g of n-butyl titanate, 3g of acetylacetone, 3g of ethylenediaminetetraacetic acid, 1g of citric acid, and use ammonia water Adjust the pH to 8, quickly stir at 80°C to form a transparent sol, pre-f...

Embodiment 2

[0031] Preparation of highly dispersed nano-graphene microsheet slurry: 5g of expanded graphite was added to 992.4g of aqueous solution, and while stirring, 5g of dispersant CTAB, 0.15g of defoamer DELTA-FC1503, 0.6g of wetting In the aqueous solution of agent TEGOwet280, stir and mix well, and pre-disperse with an emulsifier. Carry out sand mill to grind and disperse then, zirconium bead filling rate is 75%, and the diameter of zirconium bead selection is 0.3mm, and grinding line speed 12m / s, in 2g intercalation agent dodecylbenzene sulfonic acid, dispersant and grinding shear Under the synergistic action of forces, a nano-graphene microsheet slurry with a diameter of about 3 microns and a thickness of ≤10 layers is made.

[0032] Preparation of zinc oxide weak-light photocatalyst slurry: Add 30g zinc oxalate to 60g ethanol and stir, then add 0.5g titanium tetrachloride, 4g acetylacetone, 4g ethylenediaminetetraacetic acid, 1.5g citric acid, adjust with ammonia water pH to 9...

Embodiment 3

[0036] Preparation of highly dispersed nanographene microsheet slurry: Add 8g of expanded graphite to 983g of aqueous solution, and add 8g of dispersant CTAB, 0.2g of defoamer DELTA-FC1522, and 0.8g of wetting agent while stirring In the aqueous solution of TEGO wet280, stir and mix well, and pre-disperse with an emulsifier. Carry out sand mill to grind and disperse then, zirconium bead filling rate is 80%, and zirconium bead is selected to be that diameter is 0.3mm, and grinding line speed 12m / s, in the synergy of 3g intercalation agent ferric chloride, dispersant and grinding shearing force Under the action, a nano-graphene microsheet slurry with a diameter of about 2 microns and a thickness of ≤10 layers is made.

[0037] Preparation of zinc oxide weak-light photocatalyst slurry: 40g zinc stearate was added to 47.2g ethanol and stirred, then 0.8g isopropyl titanate, 5g acetylacetone, 5g ethylenediaminetetraacetic acid, 2g citric acid were added successively, Adjust the pH ...

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Abstract

A preparation method of porous graphene loaded low-light photocatalyst nano-silver composite antiviral powder comprises the following steps: uniformly mixing a dispersing agent in an aqueous solution,prefabricating an expanded graphite premixed solution, then conducting grinding by a sand mill, and preparing a nano-graphene microchip solution with 10 or less layers under the synergistic effect ofan intercalating agent, a dispersing agent, a wetting agent, a defoaming agent and a grinding shear force; utilizing a sol-gel method to form an amorphous titanium dioxide coating layer on the surface of zinc oxide crystal lattices while doping titanium into the zinc oxide crystal lattices to prepare low-light photocatalyst powder, and preparing low-light photocatalyst dispersion liquid with theparticle size of 50 nanometers or less; then, preparing a metastable ultra-high-concentration nano complex silver solution from a silver compound by using an efficient complexing agent; and finally, mixing the three solutions, conducting ultrasonic treatment, irradiating the composite slurry under a constant-power fluorescent lamp to reduce remaining silver ions, then conducting drying, so as to finally obtain porous graphene loaded low-light photocatalyst nano-silver composite antiviral powder with excellent sterilization and virus killing capacity.

Description

technical field [0001] The invention belongs to the technical field of preparation of antiviral materials, and in particular relates to the preparation of porous graphene-loaded weak-light photocatalyst-nano-silver composite antiviral powder. Background technique [0002] In recent years, studies have reported that silver nanoparticles can effectively inhibit human immunodeficiency virus, hepatitis B virus, respiratory syncytial virus, herpes simplex virus-1, monkeypox virus and influenza virus. With its extremely high antibacterial activity and no drug resistance, nano silver has incomparable advantages over traditional inorganic antibacterial agents. Although the antimicrobial activity of nanosilver is widely recognized, silver is a heavy metal, and even in nanometer form, excessive contact with the human body may produce mild toxicity. How to reduce the amount of silver while maintaining its high antibacterial activity is an important issue facing the development of nano...

Claims

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Application Information

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IPC IPC(8): A01N59/16A01N25/08A01N25/12A61L2/08A01P1/00A01P3/00
CPCA01N59/16A01N25/08A01N25/12A61L2/088A61L2/084
Inventor 张春明冉伟
Owner 聚治苏州纳米科技有限公司
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