Preparation method of silver-carrying layered titanate composite nano-grade material

A composite nanomaterial, layered titanate technology, applied in the fields of botanical equipment and methods, nanotechnology, nanotechnology, etc., can solve the problems of discoloration of antibacterial products, insufficient stability of silver antibacterial nanopowder, and easy deterioration.

Inactive Publication Date: 2013-03-27
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current silver-based antibacterial nano-powders have the following problems in industrial application: 1. The release rate of the active ingredient silver ions is too fast, which cannot guarantee the durability of its efficacy; 2. The silver-based antibacterial nano-powders are not stable

Method used

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  • Preparation method of silver-carrying layered titanate composite nano-grade material
  • Preparation method of silver-carrying layered titanate composite nano-grade material

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Add 2.0 g of anatase titanium dioxide nanoparticles into 10 mol / L sodium hydroxide aqueous solution, stir and disperse evenly. Then the suspension was put into a Teflon-lined stainless steel autoclave and reacted at 403 K for 24 h. After the reaction, the precipitated product was washed with deionized water, and then dried under normal pressure at 333K for 24 hours. A layered sodium titanate powder material is obtained.

[0025] Add the layered sodium titanate powder prepared in the previous step into 100 ml of deionized water, and stir evenly. Silver nitrate and 3 mL of ammonia were added to another 50 mL of deionized water and stirred to dissolve. The percentage of added silver element mass to titanium dioxide mass is 5%. The dilute ammonia solution of silver nitrate was added to the layered sodium titanate suspension, stirred for 12 hours, suction filtered, and then washed once with deionized water. The washed powder material was dried under normal pressure at 33...

Embodiment 2

[0027] Add 8 ml of n-tetrabutyl titanate into 1 mol / L sodium hydroxide aqueous solution, stir and disperse evenly. Then the suspension was put into a Teflon-lined stainless steel autoclave and reacted at 453 K for 24 h. After the reaction, the precipitated product was washed with deionized water, and then dried under normal pressure at 333K for 24 hours. A layered sodium titanate powder material is obtained.

[0028] Add the layered sodium titanate powder prepared in the previous step into 100 ml of deionized water, and stir evenly. Silver nitrate and 2 mL of ammonia were added to another 50 mL of deionized water and stirred to dissolve. The percentage of the added silver element mass to the mass equivalent of titanium dioxide is 3%, and the mass equivalent of titanium dioxide is converted by the raw material n-tetrabutyl titanate. Then, the dilute ammonia solution of silver nitrate was added to the layered sodium titanate suspension, stirred for 12 hours, and then filtered...

Embodiment 3

[0030] Add 5 ml of isopropyl titanate into 2 mol / L sodium hydroxide aqueous solution, stir and disperse evenly. Then the suspension was put into a Teflon-lined stainless steel autoclave and reacted at 423 K for 12 h. After the reaction, the precipitated product was washed with deionized water, and then dried under normal pressure at 333K for 24 hours. A layered sodium titanate powder material is obtained.

[0031] Add the layered sodium titanate powder prepared in the previous step into 100 ml of deionized water, and stir evenly. Silver nitrate and 3 mL of ammonia were added to another 50 mL of deionized water and stirred to dissolve. The percentage of the added silver element mass to the mass equivalent of titanium dioxide is 3%, and the mass equivalent of titanium dioxide is converted by the raw material isopropyl titanate. Then, the dilute ammonia solution of silver nitrate was added to the layered sodium titanate suspension, stirred for 12 hours, and then filtered with ...

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Abstract

The invention relates to a preparation method of a silver-carrying layered titanate composite nano-grade material. The method is characterized in that: a certain amount of a solid-phase or liquid-phase titanium source is subjected to a high-pressure hydrothermal treatment or a normal-pressure reflux reaction in an alkali solution, such that a layered titanate nano-grade material is prepared; silver nitrate is dissolved in a dilute ammonia water solution; the prepared layered titanate powder is added; with an ion exchange reduction method, elemental silver nano-particle loading is carried out, such that the silver-carrying layered titanate composite nano-grade material is prepared. With the preparation method, silver nano-particles can be uniformly loaded on the inside and surface of the titanate layered structure. The particle size of the silver nano-particles is ultra-small, particle size distribution is narrow, and particle dispersion is high. The obtained composite product is pure white, and has the advantages such as stable performance and no discoloration. The preparation method and the process flow are simple, parameter adjustable range is wide, repeatability is high, and large-scale production can be carried out.

Description

technical field [0001] The invention relates to a preparation method of a composite nano material, in particular to a preparation method of a silver-loaded layered titanate composite nano material. Background technique [0002] Silver-based antibacterial agents have broad-spectrum antibacterial and disinfection effects, and can endow various antibacterial products with excellent antibacterial effects. The reason why silver-based antibacterial agents have excellent antibacterial properties is that the trace amount of silver ions released from the material has antibacterial and sterilizing effects. However, the current silver-based antibacterial nano-powders have the following problems in industrial application: 1. The release rate of the active ingredient silver ions is too fast, which cannot guarantee the durability of its efficacy; 2. The silver-based antibacterial nano-powders are not stable enough, easily Deterioration; 3. Excessive migration of active ingredients from t...

Claims

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Application Information

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IPC IPC(8): A01N59/16A01P1/00B82Y30/00B82Y40/00
Inventor 赵斌金彩虹殷天惠陈超何丹农
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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