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 dioxi

Method used

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  • Preparation method of nanometer titanium dioxide composite nanometer silver sol

Examples

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Example Embodiment

[0029] Example 1 The preparation method of the nanometer titanium dioxide compound nanometer silver sol includes the following steps:

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

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

[0032] (3) Place the reaction solution in a reaction kettle with a reflux device at 100°C and a stirring speed of 250 rpm, and react for 4 hours to obtain a transparent nano titanium dioxide sol.

[0033] (4) Dissolving 4.5 g of polyvinylpyrrolidone and 100 g of glycerol in the nano titanium dioxide sol to form a reducing solution.

[0034...

Example Embodiment

[0043] Example 2 The preparation method of the nanometer titanium dioxide compound nanometer silver sol includes the following steps:

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

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

[0046] (3) Place the reaction solution in a reaction kettle with a reflux device at 90° C. and a stirring speed of 50 rpm, and react for 2 hours to obtain a transparent nano titanium dioxide sol.

[0047] (4) Dissolve 15 g of sodium dodecylbenzene sulfonate and 150 g of propylene glycol in the nano titanium dioxide sol to form a reducing solution.

[004...

Example Embodiment

[0057] Example 3 The preparation method of the nanometer titanium dioxide compound nanometer silver sol includes the following steps:

[0058] (1) Add 4 kg of titanium oxysulfate to 400 kg of deionized water to prepare a solution, fully stir for 30 minutes, adjust the pH to 9 with 15% ammonia water, and continue to fully stir for 30 minutes to prepare a titanium hydroxide solution.

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

[0060] (3) Place the reaction solution in a reaction kettle with a reflux device at 120°C and a stirring speed of 500 rpm, and react for 6 hours to obtain a transparent nano titanium dioxide sol.

[0061] (4) Dissolve 50 kg β-cyclodextrin and 400 kg ethylene glycol in the nano-titania sol to form a reducing solution.

[0062] (5) Dissolve 150 g of silver n...

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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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