Preparation method of nanometer titanium dioxide composite nanometer silver sol

A nano-titanium dioxide, nano-silver sol technology, applied in chemical instruments and methods, botanical equipment and methods, separation methods, etc., can solve the problems of narrowing the scope of application, inability to use, etc., to expand the scope of application, easy operation, and stability. Good results

Inactive Publication Date: 2015-08-12
上海上星家居用品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, patent 200910100623.5 prepares silver-loaded nano-titanium dioxide antifungal and antibacterial agent. Although the preparation method can obtain the composite of silver and titanium dioxide particles at the nanometer scale, the product is powdery, which greatly reduces its application range; patent 200510126613.0 prepared nano-titanium dioxide-loaded silver The nanoparticle method, although it provides a method for loading silver nanoparticles in different nano-titanium dioxide structures, the product produced by the method is also granular and cannot be used in some products, such as antibacterial and deodorant sprays , but also its dispersion in the solution and other issues to be solved

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  • Preparation method of nanometer titanium dioxide composite nanometer silver sol

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Embodiment 1

[0029] Embodiment 1 The preparation method of this nano-titanium dioxide composite nano-silver sol comprises the following steps:

[0030] (1) Add 15 g of titanyl sulfate to 1000 g of deionized water to prepare a solution. After stirring for 30 minutes, adjust the pH value to 7 with 25% ammonia water, and continue stirring for 30 minutes to prepare a titanium hydroxide solution.

[0031] (2) Add 15 g of stabilizer organic acid citric acid to the titanium hydroxide solution, stir thoroughly for 30 minutes, then add 15 g of oxidant hydrogen peroxide, continue to stir fully and let the reaction solution stand for more than 10 hours.

[0032] (3) The reaction solution was placed in a reaction kettle with a reflux device under the condition of 100° C. and a stirring speed of 250 rpm, and reacted for 4 hours to obtain a transparent nano-titanium dioxide sol.

[0033] (4) 4.5g of polyvinylpyrrolidone and 100g of glycerol were dissolved in the nano-titanium dioxide sol to form a reduc...

Embodiment 2

[0043] Embodiment 2 The preparation method of this nano-titanium dioxide composite nano-silver sol comprises the following steps:

[0044] (1) Add 5 g of titanyl sulfate to 1000 g of deionized water to prepare a solution, stir thoroughly for 30 minutes, adjust the pH value to 8 with 10% ammonia water, and continue stirring for 1 hour to prepare a titanium hydroxide solution.

[0045] (2) Add 0.05 g of stabilizer organic acid citric acid to the titanium hydroxide solution, stir thoroughly for 30 minutes, then add 5 g of oxidant hydrogen peroxide, continue to stir fully, and let the reaction solution stand for 12 hours.

[0046] (3) The reaction solution was placed in a reaction kettle with a reflux device under the condition of 90° C. and a stirring speed of 50 rpm, and reacted for 2 hours to obtain a transparent nano-titanium dioxide sol.

[0047] (4) 15g of sodium dodecylbenzenesulfonate and 150g of propylene glycol were dissolved in the nano-titanium dioxide sol to form a re...

Embodiment 3

[0057] Example 3 The preparation method of the nano-titanium dioxide composite nano-silver sol comprises the following steps:

[0058] (1) Add 4 kg of titanyl sulfate to 400 kg of deionized water to prepare a solution. After stirring for 30 minutes, adjust the pH value to 9 with 15% ammonia water, and continue stirring for 30 minutes to obtain a titanium hydroxide solution.

[0059] (2) Add 4 kg of stabilizer organic acid citric acid to the titanium hydroxide solution, stir thoroughly for 30 minutes, then add 40 kg of oxidizing agent hydrogen peroxide, continue to stir fully and let the reaction solution stand for 12 hours.

[0060] (3) The reaction solution was placed in a reaction kettle with a reflux device under the condition of 120° C. and a stirring speed of 500 rpm, and reacted for 6 hours to obtain a transparent nano-titanium dioxide sol.

[0061] (4) Dissolving 50kg of β-cyclodextrin and 400kg of ethylene glycol in the nano titanium dioxide sol to form a reducing solu...

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Abstract

The invention provides a preparation method of nanometer titanium dioxide composite nanometer silver sol. The preparation method comprises the following steps of 1, dissolving titanyl sulfate or titanium sulfate in water, carrying out stirring, adjusting pH by ammonium hydroxide and carrying out stirring, 2, adding citric acid as a stabilizing agent into titanium hydroxide, carrying out stirring, adding hydrogen peroxide as an oxidizing agent into the mixed solution, carrying out full stirring and standing the mixture for 10h or more, 3, carrying out stirring heating reflux on the reaction solution in an oil bath at a temperature of 90-120 DEG C for 2-6h, 4, dissolving a protective agent and a reducer into the nanometer titanium dioxide sol to obtain a reduction solution, 5, dissolving a silver-containing oxidizing agent in water to obtain an oxidation solution, 6, putting the reduction solution into a reactor with a stirring reflux device at a temperature of 100-160 DEG C, and dropwisely adding the silver-containing oxidizing agent into the reduction solution, and 7, after dropwise addition, carrying out heating reflux stirring for 1-6h to obtain the nanometer titanium dioxide composite nanometer silver sol.

Description

technical field [0001] The invention relates to the technical field of nano-titanium dioxide sol, in particular to a preparation method of nano-titanium dioxide compounded nano-silver sol. Background technique [0002] Nano-titanium dioxide is an ideal environment-friendly photocatalyst, which has the advantages of good biological and chemical inertness, strong resistance to light and chemical corrosion, and low synthesis cost, so it is considered to have the most application potential. Since Frank and Bark first discovered that titanium dioxide can be used to degrade cyanide in sewage in 1997, more and more scientists have been engaged in research on the application of titanium dioxide in environmental protection. Especially in water purification, air purification, antibacterial disinfection, cancer treatment, sewage treatment and so on. [0003] Nano-silver sol is favored by people as an inorganic, broad-spectrum, long-acting, and side-effect-free antibacterial agent, and...

Claims

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Application Information

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IPC IPC(8): A01N59/16A01P1/00A01P3/00B01J23/50B01D53/86
Inventor 蒲秀英任旺任明星王康陈华杰
Owner 上海上星家居用品有限公司
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